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.epf -i ../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 00:14:06,833 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 00:14:06,835 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 00:14:06,850 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 00:14:06,850 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 00:14:06,851 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 00:14:06,852 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 00:14:06,854 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 00:14:06,856 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 00:14:06,857 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 00:14:06,857 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 00:14:06,858 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 00:14:06,859 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 00:14:06,860 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 00:14:06,861 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 00:14:06,863 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 00:14:06,865 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 00:14:06,867 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 00:14:06,869 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 00:14:06,870 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 00:14:06,872 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 00:14:06,878 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.epf [2018-01-21 00:14:06,887 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 00:14:06,887 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 00:14:06,888 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 00:14:06,888 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 00:14:06,888 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 00:14:06,888 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 00:14:06,888 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 00:14:06,889 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 00:14:06,889 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 00:14:06,889 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 00:14:06,889 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 00:14:06,889 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 00:14:06,890 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 00:14:06,890 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 00:14:06,890 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 00:14:06,890 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 00:14:06,890 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 00:14:06,890 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 00:14:06,890 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 00:14:06,891 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 00:14:06,891 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 00:14:06,891 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 00:14:06,891 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 00:14:06,891 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 00:14:06,891 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 00:14:06,892 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 00:14:06,892 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 00:14:06,892 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 00:14:06,892 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 00:14:06,892 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 00:14:06,892 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 00:14:06,892 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 00:14:06,893 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 00:14:06,893 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 00:14:06,893 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 00:14:06,893 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 00:14:06,894 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 00:14:06,894 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 00:14:06,925 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 00:14:06,936 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 00:14:06,939 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 00:14:06,940 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 00:14:06,940 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 00:14:06,941 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i [2018-01-21 00:14:07,102 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 00:14:07,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 00:14:07,107 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 00:14:07,107 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 00:14:07,112 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 00:14:07,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:14:07" (1/1) ... [2018-01-21 00:14:07,115 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 12:14:07, skipping insertion in model container [2018-01-21 00:14:07,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 12:14:07" (1/1) ... [2018-01-21 00:14:07,129 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:14:07,169 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 00:14:07,292 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:14:07,315 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 00:14:07,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:14:07 WrapperNode [2018-01-21 00:14:07,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 00:14:07,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 00:14:07,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 00:14:07,325 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 00:14:07,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:14:07" (1/1) ... [2018-01-21 00:14:07,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:14:07" (1/1) ... [2018-01-21 00:14:07,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:14:07" (1/1) ... [2018-01-21 00:14:07,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:14:07" (1/1) ... [2018-01-21 00:14:07,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:14:07" (1/1) ... [2018-01-21 00:14:07,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:14:07" (1/1) ... [2018-01-21 00:14:07,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:14:07" (1/1) ... [2018-01-21 00:14:07,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 00:14:07,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 00:14:07,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 00:14:07,368 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 00:14:07,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:14:07" (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 00:14:07,419 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 00:14:07,419 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 00:14:07,419 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 00:14:07,419 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 00:14:07,419 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 00:14:07,419 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 00:14:07,419 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 00:14:07,420 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 00:14:07,420 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 00:14:07,420 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 00:14:07,420 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 00:14:07,420 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 00:14:07,420 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 00:14:07,420 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-01-21 00:14:07,420 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 00:14:07,420 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 00:14:07,420 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 00:14:07,708 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 00:14:07,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:14:07 BoogieIcfgContainer [2018-01-21 00:14:07,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 00:14:07,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 00:14:07,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 00:14:07,711 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 00:14:07,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 12:14:07" (1/3) ... [2018-01-21 00:14:07,712 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c14320b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:14:07, skipping insertion in model container [2018-01-21 00:14:07,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 12:14:07" (2/3) ... [2018-01-21 00:14:07,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c14320b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 12:14:07, skipping insertion in model container [2018-01-21 00:14:07,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 12:14:07" (3/3) ... [2018-01-21 00:14:07,715 INFO L105 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1_true-unreach-call_true-valid-memsafety.i [2018-01-21 00:14:07,724 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 00:14:07,731 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 00:14:07,776 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:14:07,777 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:14:07,777 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:14:07,777 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:14:07,777 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:14:07,777 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:14:07,777 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:14:07,777 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 00:14:07,778 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:14:07,799 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2018-01-21 00:14:07,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 00:14:07,804 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:14:07,804 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 00:14:07,804 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 00:14:07,808 INFO L82 PathProgramCache]: Analyzing trace with hash 202351, now seen corresponding path program 1 times [2018-01-21 00:14:07,810 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:14:07,856 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:14:07,857 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:14:07,857 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:14:07,857 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:14:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:14:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:14:07,906 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:14:07,913 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:14:07,918 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:14:07,918 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:14:07,919 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:14:07,919 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:14:07,919 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:14:07,919 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:14:07,919 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:14:07,919 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 00:14:07,919 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:14:07,922 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2018-01-21 00:14:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-01-21 00:14:07,924 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:14:07,924 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] [2018-01-21 00:14:07,924 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:14:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash -579641887, now seen corresponding path program 1 times [2018-01-21 00:14:07,925 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:14:07,927 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:14:07,927 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:14:07,927 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:14:07,927 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:14:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:14:07,955 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:14:08,073 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 00:14:08,074 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:14:08,075 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:14:08,075 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:14:08,077 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:14:08,087 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:14:08,088 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:14:08,090 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 2 states. [2018-01-21 00:14:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:14:08,109 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2018-01-21 00:14:08,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:14:08,110 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2018-01-21 00:14:08,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:14:08,122 INFO L225 Difference]: With dead ends: 117 [2018-01-21 00:14:08,122 INFO L226 Difference]: Without dead ends: 70 [2018-01-21 00:14:08,125 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 00:14:08,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2018-01-21 00:14:08,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2018-01-21 00:14:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-01-21 00:14:08,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2018-01-21 00:14:08,157 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 20 [2018-01-21 00:14:08,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:14:08,157 INFO L432 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2018-01-21 00:14:08,158 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:14:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2018-01-21 00:14:08,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-21 00:14:08,159 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:14:08,159 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] [2018-01-21 00:14:08,159 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:14:08,159 INFO L82 PathProgramCache]: Analyzing trace with hash -675072438, now seen corresponding path program 1 times [2018-01-21 00:14:08,159 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:14:08,160 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:14:08,160 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:14:08,160 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:14:08,160 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:14:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:14:08,177 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:14:08,280 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 00:14:08,280 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:14:08,280 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:14:08,280 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:14:08,282 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:14:08,282 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:14:08,282 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:14:08,283 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 5 states. [2018-01-21 00:14:08,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:14:08,398 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2018-01-21 00:14:08,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:14:08,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-01-21 00:14:08,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:14:08,401 INFO L225 Difference]: With dead ends: 118 [2018-01-21 00:14:08,401 INFO L226 Difference]: Without dead ends: 99 [2018-01-21 00:14:08,402 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 00:14:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2018-01-21 00:14:08,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2018-01-21 00:14:08,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-01-21 00:14:08,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2018-01-21 00:14:08,412 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 29 [2018-01-21 00:14:08,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:14:08,412 INFO L432 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2018-01-21 00:14:08,412 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:14:08,412 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2018-01-21 00:14:08,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-01-21 00:14:08,414 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:14:08,414 INFO L322 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:14:08,414 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 00:14:08,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1367476593, now seen corresponding path program 1 times [2018-01-21 00:14:08,414 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:14:08,416 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:14:08,416 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:14:08,416 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:14:08,416 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:14:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:14:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 00:14:08,470 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 00:14:08,478 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:14:08,484 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:14:08,484 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 00:14:08,497 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 00:14:08,498 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 00:14:08,498 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 00:14:08,498 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 00:14:08,498 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 00:14:08,498 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 00:14:08,498 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 00:14:08,498 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 00:14:08,498 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 00:14:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2018-01-21 00:14:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-01-21 00:14:08,501 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:14:08,502 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 00:14:08,502 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 00:14:08,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1698925306, now seen corresponding path program 1 times [2018-01-21 00:14:08,502 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:14:08,504 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:14:08,504 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:14:08,504 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:14:08,504 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:14:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:14:08,514 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:14:08,527 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 00:14:08,528 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:14:08,528 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 00:14:08,528 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:14:08,528 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 00:14:08,529 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 00:14:08,529 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 00:14:08,529 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 2 states. [2018-01-21 00:14:08,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:14:08,535 INFO L93 Difference]: Finished difference Result 117 states and 154 transitions. [2018-01-21 00:14:08,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 00:14:08,535 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2018-01-21 00:14:08,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:14:08,536 INFO L225 Difference]: With dead ends: 117 [2018-01-21 00:14:08,536 INFO L226 Difference]: Without dead ends: 68 [2018-01-21 00:14:08,537 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 00:14:08,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-01-21 00:14:08,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-01-21 00:14:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-01-21 00:14:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2018-01-21 00:14:08,542 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 18 [2018-01-21 00:14:08,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:14:08,543 INFO L432 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2018-01-21 00:14:08,543 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 00:14:08,543 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2018-01-21 00:14:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 00:14:08,544 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:14:08,544 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 00:14:08,544 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 00:14:08,544 INFO L82 PathProgramCache]: Analyzing trace with hash -456567889, now seen corresponding path program 1 times [2018-01-21 00:14:08,544 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:14:08,546 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:14:08,546 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:14:08,546 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:14:08,546 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:14:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:14:08,558 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:14:08,613 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 00:14:08,613 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 00:14:08,614 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 00:14:08,614 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 00:14:08,614 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 00:14:08,614 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 00:14:08,614 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 00:14:08,614 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 5 states. [2018-01-21 00:14:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 00:14:08,750 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2018-01-21 00:14:08,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 00:14:08,751 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2018-01-21 00:14:08,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 00:14:08,752 INFO L225 Difference]: With dead ends: 114 [2018-01-21 00:14:08,752 INFO L226 Difference]: Without dead ends: 97 [2018-01-21 00:14:08,752 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 00:14:08,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-01-21 00:14:08,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2018-01-21 00:14:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-01-21 00:14:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2018-01-21 00:14:08,758 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 27 [2018-01-21 00:14:08,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 00:14:08,758 INFO L432 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2018-01-21 00:14:08,758 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 00:14:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2018-01-21 00:14:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-01-21 00:14:08,760 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 00:14:08,760 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] [2018-01-21 00:14:08,760 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 00:14:08,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1118740172, now seen corresponding path program 1 times [2018-01-21 00:14:08,761 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 00:14:08,762 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:14:08,762 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 00:14:08,762 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 00:14:08,762 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 00:14:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 00:14:08,779 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 00:14:08,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 00:14:08,921 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 00:14:08,921 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 00:14:08,922 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 42 with the following transitions: [2018-01-21 00:14:08,924 INFO L201 CegarAbsIntRunner]: [0], [1], [2], [3], [4], [8], [10], [13], [39], [43], [48], [52], [60], [61], [66], [70], [78], [82], [84], [85], [128], [130], [131], [137], [141], [143], [144], [155], [156], [157], [158], [159], [164], [166], [167], [168], [174], [175], [176] [2018-01-21 00:14:08,987 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 00:14:08,987 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