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/memsafety/test-0504_true-valid-memsafety.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:26:44,854 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:26:44,856 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:26:44,870 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:26:44,870 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:26:44,871 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:26:44,872 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:26:44,874 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:26:44,877 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:26:44,877 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:26:44,878 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:26:44,878 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:26:44,879 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:26:44,879 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:26:44,880 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:26:44,883 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:26:44,885 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:26:44,887 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:26:44,888 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:26:44,890 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:26:44,892 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 08:26:44,898 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:26:44,898 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:26:44,899 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-21 08:26:44,909 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:26:44,909 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:26:44,910 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:26:44,910 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:26:44,911 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:26:44,911 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:26:44,911 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:26:44,911 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:26:44,911 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:26:44,912 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:26:44,912 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:26:44,913 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:26:44,913 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:26:44,913 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:26:44,913 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:26:44,913 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:26:44,914 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:26:44,914 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:26:44,914 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:26:44,914 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:26:44,914 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:26:44,914 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:26:44,915 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:26:44,915 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:26:44,915 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:26:44,915 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:26:44,916 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:26:44,916 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:26:44,916 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:26:44,916 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:26:44,916 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:26:44,917 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:26:44,917 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:26:44,917 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:26:44,917 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:26:44,917 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:26:44,917 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:26:44,918 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:26:44,919 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:26:44,919 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:26:44,954 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:26:44,966 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:26:44,971 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:26:44,973 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:26:44,973 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:26:44,974 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/memsafety/test-0504_true-valid-memsafety.i [2018-01-21 08:26:45,172 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:26:45,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:26:45,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:26:45,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:26:45,182 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:26:45,183 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:26:45" (1/1) ... [2018-01-21 08:26:45,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1188456b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:26:45, skipping insertion in model container [2018-01-21 08:26:45,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:26:45" (1/1) ... [2018-01-21 08:26:45,201 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:26:45,240 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:26:45,362 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:26:45,380 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:26:45,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:26:45 WrapperNode [2018-01-21 08:26:45,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:26:45,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:26:45,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:26:45,390 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:26:45,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:26:45" (1/1) ... [2018-01-21 08:26:45,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:26:45" (1/1) ... [2018-01-21 08:26:45,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:26:45" (1/1) ... [2018-01-21 08:26:45,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:26:45" (1/1) ... [2018-01-21 08:26:45,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:26:45" (1/1) ... [2018-01-21 08:26:45,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:26:45" (1/1) ... [2018-01-21 08:26:45,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:26:45" (1/1) ... [2018-01-21 08:26:45,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:26:45,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:26:45,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:26:45,433 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:26:45,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:26:45" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:26:45,482 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:26:45,483 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:26:45,483 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:26:45,483 INFO L128 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-01-21 08:26:45,483 INFO L128 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-01-21 08:26:45,483 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:26:45,484 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:26:45,484 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:26:45,484 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:26:45,484 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:26:45,484 INFO L128 BoogieDeclarations]: Found specification of procedure malloc [2018-01-21 08:26:45,485 INFO L128 BoogieDeclarations]: Found specification of procedure free [2018-01-21 08:26:45,485 INFO L128 BoogieDeclarations]: Found specification of procedure abort [2018-01-21 08:26:45,485 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:26:45,485 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:26:45,485 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:26:45,485 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:26:45,773 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:26:45,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:26:45 BoogieIcfgContainer [2018-01-21 08:26:45,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:26:45,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:26:45,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:26:45,776 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:26:45,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:26:45" (1/3) ... [2018-01-21 08:26:45,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce62b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:26:45, skipping insertion in model container [2018-01-21 08:26:45,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:26:45" (2/3) ... [2018-01-21 08:26:45,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce62b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:26:45, skipping insertion in model container [2018-01-21 08:26:45,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:26:45" (3/3) ... [2018-01-21 08:26:45,781 INFO L105 eAbstractionObserver]: Analyzing ICFG test-0504_true-valid-memsafety.i [2018-01-21 08:26:45,790 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:26:45,799 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 08:26:45,847 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:26:45,847 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:26:45,847 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:26:45,847 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:26:45,847 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:26:45,848 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:26:45,848 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:26:45,848 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:26:45,849 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:26:45,870 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2018-01-21 08:26:45,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:26:45,877 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:26:45,878 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:26:45,879 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:26:45,884 INFO L82 PathProgramCache]: Analyzing trace with hash 141778, now seen corresponding path program 1 times [2018-01-21 08:26:45,887 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:26:45,946 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:45,946 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:26:45,946 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:45,946 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:26:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:26:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:26:46,001 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:26:46,008 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:26:46,014 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:26:46,014 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:26:46,015 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:26:46,015 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:26:46,015 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:26:46,015 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:26:46,015 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:26:46,015 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:26:46,015 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:26:46,018 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2018-01-21 08:26:46,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-01-21 08:26:46,019 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:26:46,019 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:26:46,019 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:26:46,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1069227820, now seen corresponding path program 1 times [2018-01-21 08:26:46,020 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:26:46,021 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:46,021 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:26:46,021 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:46,021 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:26:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:26:46,039 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:26:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:26:46,068 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:26:46,069 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:26:46,069 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:26:46,071 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:26:46,083 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:26:46,084 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:26:46,086 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 2 states. [2018-01-21 08:26:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:26:46,202 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2018-01-21 08:26:46,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:26:46,204 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2018-01-21 08:26:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:26:46,216 INFO L225 Difference]: With dead ends: 109 [2018-01-21 08:26:46,216 INFO L226 Difference]: Without dead ends: 55 [2018-01-21 08:26:46,219 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:26:46,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-01-21 08:26:46,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-01-21 08:26:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-01-21 08:26:46,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2018-01-21 08:26:46,254 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 12 [2018-01-21 08:26:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:26:46,254 INFO L432 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2018-01-21 08:26:46,255 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:26:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2018-01-21 08:26:46,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-01-21 08:26:46,255 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:26:46,255 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:26:46,255 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:26:46,256 INFO L82 PathProgramCache]: Analyzing trace with hash 764024314, now seen corresponding path program 1 times [2018-01-21 08:26:46,256 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:26:46,257 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:46,257 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:26:46,257 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:46,257 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:26:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:26:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:26:46,281 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:26:46,285 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:26:46,286 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:26:46,287 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:26:46,294 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:26:46,294 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:26:46,294 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:26:46,294 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:26:46,294 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:26:46,294 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:26:46,294 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:26:46,294 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 08:26:46,294 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:26:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states. [2018-01-21 08:26:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-01-21 08:26:46,296 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:26:46,296 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:26:46,296 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 08:26:46,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1951957839, now seen corresponding path program 1 times [2018-01-21 08:26:46,297 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:26:46,297 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:46,298 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:26:46,298 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:46,298 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:26:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:26:46,305 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:26:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:26:46,315 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:26:46,315 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:26:46,315 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:26:46,315 INFO L409 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-01-21 08:26:46,316 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-01-21 08:26:46,316 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:26:46,316 INFO L87 Difference]: Start difference. First operand 58 states. Second operand 2 states. [2018-01-21 08:26:46,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:26:46,321 INFO L93 Difference]: Finished difference Result 109 states and 129 transitions. [2018-01-21 08:26:46,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-01-21 08:26:46,322 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-01-21 08:26:46,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:26:46,322 INFO L225 Difference]: With dead ends: 109 [2018-01-21 08:26:46,323 INFO L226 Difference]: Without dead ends: 53 [2018-01-21 08:26:46,323 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-01-21 08:26:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-01-21 08:26:46,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-01-21 08:26:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-01-21 08:26:46,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-01-21 08:26:46,330 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 10 [2018-01-21 08:26:46,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:26:46,330 INFO L432 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-01-21 08:26:46,330 INFO L433 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-01-21 08:26:46,330 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-01-21 08:26:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-01-21 08:26:46,331 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:26:46,331 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:26:46,331 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 08:26:46,331 INFO L82 PathProgramCache]: Analyzing trace with hash -691941633, now seen corresponding path program 1 times [2018-01-21 08:26:46,332 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:26:46,333 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:46,333 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:26:46,333 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:46,333 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:26:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:26:46,341 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:26:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:26:46,376 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:26:46,376 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-01-21 08:26:46,376 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:26:46,376 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 08:26:46,377 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 08:26:46,377 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:26:46,377 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 3 states. [2018-01-21 08:26:46,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:26:46,450 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2018-01-21 08:26:46,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 08:26:46,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-01-21 08:26:46,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:26:46,452 INFO L225 Difference]: With dead ends: 72 [2018-01-21 08:26:46,452 INFO L226 Difference]: Without dead ends: 69 [2018-01-21 08:26:46,453 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 08:26:46,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-01-21 08:26:46,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2018-01-21 08:26:46,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-01-21 08:26:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2018-01-21 08:26:46,460 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 13 [2018-01-21 08:26:46,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:26:46,460 INFO L432 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2018-01-21 08:26:46,461 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 08:26:46,461 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2018-01-21 08:26:46,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-01-21 08:26:46,462 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:26:46,462 INFO L322 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 08:26:46,462 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 08:26:46,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1939646148, now seen corresponding path program 1 times [2018-01-21 08:26:46,462 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:26:46,463 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:46,464 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:26:46,464 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:46,464 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:26:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:26:46,480 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:26:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:26:46,530 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:26:46,530 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-01-21 08:26:46,530 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:26:46,530 INFO L409 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-01-21 08:26:46,531 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-01-21 08:26:46,531 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-01-21 08:26:46,531 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 3 states. [2018-01-21 08:26:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:26:46,555 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2018-01-21 08:26:46,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-01-21 08:26:46,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2018-01-21 08:26:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:26:46,557 INFO L225 Difference]: With dead ends: 131 [2018-01-21 08:26:46,557 INFO L226 Difference]: Without dead ends: 82 [2018-01-21 08:26:46,558 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 08:26:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-01-21 08:26:46,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2018-01-21 08:26:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-01-21 08:26:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2018-01-21 08:26:46,566 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 22 [2018-01-21 08:26:46,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:26:46,566 INFO L432 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2018-01-21 08:26:46,566 INFO L433 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-01-21 08:26:46,566 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2018-01-21 08:26:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-01-21 08:26:46,567 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:26:46,567 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] [2018-01-21 08:26:46,567 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 08:26:46,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1620764504, now seen corresponding path program 1 times [2018-01-21 08:26:46,567 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:26:46,568 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:46,568 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:26:46,568 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:46,568 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:26:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:26:46,587 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:26:46,671 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 08:26:46,671 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:26:46,671 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-01-21 08:26:46,672 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:26:46,672 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:26:46,672 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:26:46,672 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:26:46,672 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand 5 states. [2018-01-21 08:26:46,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:26:46,794 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2018-01-21 08:26:46,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:26:46,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2018-01-21 08:26:46,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:26:46,843 INFO L225 Difference]: With dead ends: 133 [2018-01-21 08:26:46,843 INFO L226 Difference]: Without dead ends: 86 [2018-01-21 08:26:46,844 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 08:26:46,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-21 08:26:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2018-01-21 08:26:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-01-21 08:26:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2018-01-21 08:26:46,853 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 29 [2018-01-21 08:26:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:26:46,853 INFO L432 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2018-01-21 08:26:46,853 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:26:46,853 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2018-01-21 08:26:46,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-21 08:26:46,855 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:26:46,855 INFO L322 BasicCegarLoop]: trace histogram [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] [2018-01-21 08:26:46,855 INFO L371 AbstractCegarLoop]: === Iteration 5 === [mainErr0EnsuresViolation]=== [2018-01-21 08:26:46,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1106845045, now seen corresponding path program 1 times [2018-01-21 08:26:46,855 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:26:46,856 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:46,856 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:26:46,856 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:26:46,856 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:26:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:26:46,882 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-01-21 08:26:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:26:47,076 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:26:47,076 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-01-21 08:26:47,077 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-01-21 08:26:47,079 INFO L201 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [12], [13], [18], [20], [21], [22], [23], [24], [25], [29], [31], [34], [60], [72], [76], [78], [79], [80], [81], [82], [86], [90], [99], [103], [105], [106], [107], [113], [114], [115] [2018-01-21 08:26:47,127 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:26:47,127 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