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_mostprecise.epf -i ../../../trunk/examples/svcomp/array-memsafety/mult_array-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 02:50:21,150 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 02:50:21,152 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 02:50:21,165 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 02:50:21,166 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 02:50:21,167 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 02:50:21,168 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 02:50:21,170 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 02:50:21,172 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 02:50:21,173 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 02:50:21,173 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 02:50:21,173 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 02:50:21,174 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 02:50:21,175 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 02:50:21,176 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 02:50:21,178 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 02:50:21,180 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 02:50:21,182 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 02:50:21,184 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 02:50:21,185 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 02:50:21,187 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 02:50:21,192 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 02:50:21,193 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 02:50:21,193 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_mostprecise.epf [2018-01-21 02:50:21,203 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 02:50:21,203 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 02:50:21,204 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 02:50:21,204 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 02:50:21,205 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 02:50:21,205 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 02:50:21,205 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 02:50:21,205 INFO L133 SettingsManager]: * Precise comparison operator=true [2018-01-21 02:50:21,205 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 02:50:21,206 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 02:50:21,206 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 02:50:21,206 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 02:50:21,206 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 02:50:21,206 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 02:50:21,207 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 02:50:21,207 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 02:50:21,207 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 02:50:21,207 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 02:50:21,207 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 02:50:21,207 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 02:50:21,207 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 02:50:21,207 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 02:50:21,208 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 02:50:21,208 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 02:50:21,208 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 02:50:21,208 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 02:50:21,209 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 02:50:21,209 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 02:50:21,209 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 02:50:21,209 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 02:50:21,209 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 02:50:21,209 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 02:50:21,209 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 02:50:21,209 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 02:50:21,210 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 02:50:21,210 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 02:50:21,210 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 02:50:21,210 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 02:50:21,211 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 02:50:21,211 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 02:50:21,244 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 02:50:21,254 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 02:50:21,258 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 02:50:21,259 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 02:50:21,260 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 02:50:21,260 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/mult_array-alloca_true-valid-memsafety_true-termination.i [2018-01-21 02:50:21,438 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 02:50:21,443 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 02:50:21,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 02:50:21,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 02:50:21,450 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 02:50:21,451 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:50:21" (1/1) ... [2018-01-21 02:50:21,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e99cb12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:21, skipping insertion in model container [2018-01-21 02:50:21,454 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 02:50:21" (1/1) ... [2018-01-21 02:50:21,468 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:50:21,506 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 02:50:21,632 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:50:21,650 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 02:50:21,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:21 WrapperNode [2018-01-21 02:50:21,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 02:50:21,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 02:50:21,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 02:50:21,660 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 02:50:21,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:21" (1/1) ... [2018-01-21 02:50:21,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:21" (1/1) ... [2018-01-21 02:50:21,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:21" (1/1) ... [2018-01-21 02:50:21,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:21" (1/1) ... [2018-01-21 02:50:21,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:21" (1/1) ... [2018-01-21 02:50:21,694 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:21" (1/1) ... [2018-01-21 02:50:21,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:21" (1/1) ... [2018-01-21 02:50:21,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 02:50:21,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 02:50:21,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 02:50:21,698 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 02:50:21,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:21" (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 02:50:21,754 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 02:50:21,754 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 02:50:21,754 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 02:50:21,755 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 02:50:21,755 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 02:50:21,755 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 02:50:21,755 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 02:50:21,755 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 02:50:21,755 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 02:50:21,755 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 02:50:21,755 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 02:50:21,755 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 02:50:21,973 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 02:50:21,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:50:21 BoogieIcfgContainer [2018-01-21 02:50:21,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 02:50:21,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 02:50:21,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 02:50:21,976 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 02:50:21,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 02:50:21" (1/3) ... [2018-01-21 02:50:21,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0f5871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:50:21, skipping insertion in model container [2018-01-21 02:50:21,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 02:50:21" (2/3) ... [2018-01-21 02:50:21,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0f5871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 02:50:21, skipping insertion in model container [2018-01-21 02:50:21,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 02:50:21" (3/3) ... [2018-01-21 02:50:21,980 INFO L105 eAbstractionObserver]: Analyzing ICFG mult_array-alloca_true-valid-memsafety_true-termination.i [2018-01-21 02:50:21,986 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 02:50:21,992 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 02:50:22,031 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:50:22,032 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:50:22,032 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:50:22,032 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:50:22,032 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:50:22,032 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:50:22,032 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:50:22,032 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 02:50:22,033 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:50:22,055 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 02:50:22,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 02:50:22,062 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:22,063 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 02:50:22,064 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 02:50:22,069 INFO L82 PathProgramCache]: Analyzing trace with hash 100907, now seen corresponding path program 1 times [2018-01-21 02:50:22,072 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:22,118 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:22,118 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:22,118 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:22,119 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:22,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:50:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:50:22,179 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 02:50:22,185 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:50:22,190 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:50:22,191 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:50:22,191 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:50:22,191 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:50:22,191 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:50:22,191 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:50:22,191 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:50:22,191 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 02:50:22,191 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:50:22,193 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 02:50:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 02:50:22,194 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:22,194 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:50:22,194 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:50:22,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1756096489, now seen corresponding path program 1 times [2018-01-21 02:50:22,194 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:22,195 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:22,195 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:22,195 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:22,196 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:22,213 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 02:50:22,213 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 02:50:22,213 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 02:50:22,222 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:22,223 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 02:50:22,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:22,267 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-21 02:50:22,269 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 02:50:22,270 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 02:50:22,270 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 02:50:22,282 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:22,283 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 02:50:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:22,323 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 02:50:22,488 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 02:50:22,489 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 02:50:22,525 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 02:50:22,546 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:50:22,546 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2018-01-21 02:50:22,546 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:50:22,548 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 02:50:22,625 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 02:50:22,626 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-21 02:50:22,628 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2018-01-21 02:50:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:50:22,765 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 02:50:22,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 02:50:22,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-01-21 02:50:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:50:22,778 INFO L225 Difference]: With dead ends: 60 [2018-01-21 02:50:22,779 INFO L226 Difference]: Without dead ends: 35 [2018-01-21 02:50:22,782 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-01-21 02:50:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-21 02:50:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-21 02:50:22,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-21 02:50:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-01-21 02:50:22,821 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 21 [2018-01-21 02:50:22,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:50:22,821 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-01-21 02:50:22,821 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 02:50:22,822 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-01-21 02:50:22,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 02:50:22,823 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:22,823 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 02:50:22,823 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:50:22,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1252120768, now seen corresponding path program 1 times [2018-01-21 02:50:22,823 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:22,824 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:22,825 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:22,825 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:22,825 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:22,834 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 02:50:22,834 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 02:50:22,835 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 02:50:22,845 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:22,845 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 02:50:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:22,890 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-21 02:50:22,890 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 02:50:22,890 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 02:50:22,890 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 02:50:22,896 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:22,896 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 02:50:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:22,915 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 02:50:22,939 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 02:50:22,940 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 02:50:22,968 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 02:50:22,990 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:50:22,990 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2018-01-21 02:50:22,990 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:50:22,991 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 02:50:22,991 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 02:50:22,991 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 02:50:22,992 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 4 states. [2018-01-21 02:50:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:50:23,040 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2018-01-21 02:50:23,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 02:50:23,041 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-01-21 02:50:23,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:50:23,042 INFO L225 Difference]: With dead ends: 56 [2018-01-21 02:50:23,042 INFO L226 Difference]: Without dead ends: 40 [2018-01-21 02:50:23,044 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 02:50:23,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-21 02:50:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2018-01-21 02:50:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-21 02:50:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-21 02:50:23,050 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2018-01-21 02:50:23,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:50:23,051 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-21 02:50:23,051 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 02:50:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-21 02:50:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 02:50:23,052 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:23,053 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:50:23,053 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:50:23,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1880809997, now seen corresponding path program 1 times [2018-01-21 02:50:23,053 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:23,054 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:23,054 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:23,054 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:23,055 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:23,064 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 02:50:23,064 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 02:50:23,064 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 02:50:23,074 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:23,075 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 02:50:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:23,111 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-01-21 02:50:23,113 INFO L201 CegarAbsIntRunner]: [0], [1], [6], [7], [10], [14], [17], [21], [22], [23], [24], [32], [36], [39], [41], [42], [43], [45], [49], [53], [56], [67], [68], [69], [70], [71], [72], [74], [75], [76], [77] [2018-01-21 02:50:23,167 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 02:50:23,167 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 02:50:34,664 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 02:50:34,666 INFO L268 AbstractInterpreter]: Visited 31 different actions 47 times. Merged at 15 different actions 15 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 27 variables. [2018-01-21 02:50:34,709 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 02:50:34,710 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 02:50:34,710 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-01-21 02:50:34,724 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:34,724 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 02:50:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:34,752 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 02:50:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 02:50:34,782 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 02:50:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 02:50:34,885 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:50:34,885 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2018-01-21 02:50:34,885 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:50:34,886 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 02:50:34,886 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 02:50:34,887 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 02:50:34,887 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 5 states. [2018-01-21 02:50:34,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:50:34,988 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2018-01-21 02:50:34,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 02:50:34,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-01-21 02:50:34,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:50:34,991 INFO L225 Difference]: With dead ends: 102 [2018-01-21 02:50:34,992 INFO L226 Difference]: Without dead ends: 93 [2018-01-21 02:50:34,992 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 02:50:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-01-21 02:50:35,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 54. [2018-01-21 02:50:35,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-21 02:50:35,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-21 02:50:35,002 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2018-01-21 02:50:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:50:35,003 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-21 02:50:35,003 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 02:50:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-21 02:50:35,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 02:50:35,004 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:35,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:50:35,005 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:50:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2014823503, now seen corresponding path program 1 times [2018-01-21 02:50:35,005 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:35,006 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:35,007 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:35,007 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:35,007 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:35,015 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 02:50:35,015 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 02:50:35,015 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 02:50:35,025 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:35,026 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 02:50:35,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:35,055 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-01-21 02:50:35,055 INFO L201 CegarAbsIntRunner]: [0], [1], [6], [7], [10], [14], [19], [21], [22], [23], [24], [32], [36], [39], [41], [42], [43], [45], [49], [53], [56], [67], [68], [69], [70], [71], [72], [74], [75], [76], [77] [2018-01-21 02:50:35,057 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 02:50:35,057 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 02:50:41,756 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 02:50:41,756 INFO L268 AbstractInterpreter]: Visited 31 different actions 47 times. Merged at 15 different actions 15 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 27 variables. [2018-01-21 02:50:41,761 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 02:50:41,761 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 02:50:41,761 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 02:50:41,766 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:41,767 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 02:50:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:41,785 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 02:50:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 02:50:41,818 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 02:50:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 02:50:41,899 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:50:41,899 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2018-01-21 02:50:41,899 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:50:41,900 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 02:50:41,900 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 02:50:41,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 02:50:41,900 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 5 states. [2018-01-21 02:50:41,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:50:41,939 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-01-21 02:50:41,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 02:50:41,939 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-01-21 02:50:41,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:50:41,940 INFO L225 Difference]: With dead ends: 95 [2018-01-21 02:50:41,940 INFO L226 Difference]: Without dead ends: 86 [2018-01-21 02:50:41,941 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 02:50:41,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-21 02:50:41,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2018-01-21 02:50:41,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-21 02:50:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-21 02:50:41,947 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2018-01-21 02:50:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:50:41,947 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-21 02:50:41,947 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 02:50:41,947 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-21 02:50:41,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 02:50:41,948 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:41,948 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:50:41,948 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:50:41,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1818770383, now seen corresponding path program 1 times [2018-01-21 02:50:41,948 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:41,949 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:41,949 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:41,949 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:41,949 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:41,954 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 02:50:41,954 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 02:50:41,955 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 02:50:41,961 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:41,961 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 02:50:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:41,988 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-01-21 02:50:41,989 INFO L201 CegarAbsIntRunner]: [0], [1], [6], [7], [12], [14], [17], [21], [22], [23], [24], [32], [36], [39], [41], [42], [43], [45], [49], [53], [56], [67], [68], [69], [70], [71], [72], [74], [75], [76], [77] [2018-01-21 02:50:41,990 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 02:50:41,990 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 02:50:46,479 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 02:50:46,480 INFO L268 AbstractInterpreter]: Visited 31 different actions 47 times. Merged at 15 different actions 15 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 27 variables. [2018-01-21 02:50:46,486 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 02:50:46,486 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 02:50:46,486 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 02:50:46,494 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:46,494 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 02:50:46,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:46,510 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 02:50:46,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 02:50:46,529 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 02:50:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 02:50:46,633 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:50:46,633 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2018-01-21 02:50:46,633 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:50:46,634 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 02:50:46,634 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 02:50:46,634 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 02:50:46,634 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 5 states. [2018-01-21 02:50:46,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:50:46,692 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2018-01-21 02:50:46,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 02:50:46,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-01-21 02:50:46,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:50:46,693 INFO L225 Difference]: With dead ends: 110 [2018-01-21 02:50:46,694 INFO L226 Difference]: Without dead ends: 101 [2018-01-21 02:50:46,694 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 02:50:46,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-01-21 02:50:46,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 54. [2018-01-21 02:50:46,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-21 02:50:46,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-21 02:50:46,702 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2018-01-21 02:50:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:50:46,703 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-21 02:50:46,703 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 02:50:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-21 02:50:46,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 02:50:46,704 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:46,704 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:50:46,704 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:50:46,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1952783889, now seen corresponding path program 1 times [2018-01-21 02:50:46,705 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:46,705 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:46,706 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:46,706 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:46,706 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:46,713 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 02:50:46,713 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 02:50:46,713 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 02:50:46,726 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:46,726 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 02:50:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:46,779 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-01-21 02:50:46,779 INFO L201 CegarAbsIntRunner]: [0], [1], [6], [7], [12], [14], [19], [21], [22], [23], [24], [32], [36], [39], [41], [42], [43], [45], [49], [53], [56], [67], [68], [69], [70], [71], [72], [74], [75], [76], [77] [2018-01-21 02:50:46,817 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 02:50:46,817 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 02:50:50,418 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 02:50:50,418 INFO L268 AbstractInterpreter]: Visited 31 different actions 47 times. Merged at 15 different actions 15 times. Never widened. Found 2 fixpoints after 2 different actions. Largest state had 27 variables. [2018-01-21 02:50:50,420 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 02:50:50,420 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 02:50:50,420 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 02:50:50,427 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:50,427 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 02:50:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:50,456 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 02:50:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 02:50:50,477 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 02:50:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-01-21 02:50:50,545 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:50:50,545 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2018-01-21 02:50:50,545 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:50:50,545 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 02:50:50,545 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 02:50:50,546 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 02:50:50,546 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 5 states. [2018-01-21 02:50:50,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:50:50,594 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-01-21 02:50:50,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 02:50:50,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-01-21 02:50:50,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:50:50,595 INFO L225 Difference]: With dead ends: 69 [2018-01-21 02:50:50,596 INFO L226 Difference]: Without dead ends: 60 [2018-01-21 02:50:50,596 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 02:50:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-21 02:50:50,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2018-01-21 02:50:50,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-21 02:50:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-01-21 02:50:50,602 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2018-01-21 02:50:50,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:50:50,603 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-01-21 02:50:50,603 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 02:50:50,603 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-01-21 02:50:50,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-21 02:50:50,604 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:50,604 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] [2018-01-21 02:50:50,604 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 02:50:50,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1166525403, now seen corresponding path program 1 times [2018-01-21 02:50:50,604 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:50,605 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:50,605 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:50,605 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:50,605 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:50,610 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 02:50:50,611 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 02:50:50,611 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 02:50:50,616 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:50,616 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 02:50:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:50:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 02:50:50,685 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 02:50:50,694 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:50:50,700 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:50:50,700 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 02:50:50,713 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 02:50:50,713 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 02:50:50,713 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 02:50:50,713 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 02:50:50,713 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 02:50:50,713 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 02:50:50,714 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 02:50:50,714 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 02:50:50,714 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 02:50:50,715 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 02:50:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 02:50:50,716 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:50,716 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:50:50,716 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 02:50:50,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2112136767, now seen corresponding path program 1 times [2018-01-21 02:50:50,716 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:50,717 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:50,717 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:50,718 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:50,718 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:50,724 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 02:50:50,724 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 02:50:50,724 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 02:50:50,734 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:50,734 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 02:50:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:50,768 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-21 02:50:50,768 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 02:50:50,768 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 02:50:50,769 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 02:50:50,778 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:50,778 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 02:50:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:50,795 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 02:50:50,821 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 02:50:50,821 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 02:50:50,827 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 02:50:50,848 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:50:50,848 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2018-01-21 02:50:50,848 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:50:50,848 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 02:50:50,848 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 02:50:50,848 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-21 02:50:50,849 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2018-01-21 02:50:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:50:50,908 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 02:50:50,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 02:50:50,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-01-21 02:50:50,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:50:50,909 INFO L225 Difference]: With dead ends: 60 [2018-01-21 02:50:50,910 INFO L226 Difference]: Without dead ends: 33 [2018-01-21 02:50:50,910 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-01-21 02:50:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-21 02:50:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-21 02:50:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-21 02:50:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2018-01-21 02:50:50,916 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2018-01-21 02:50:50,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:50:50,916 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2018-01-21 02:50:50,916 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 02:50:50,916 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2018-01-21 02:50:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 02:50:50,917 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:50,917 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:50:50,917 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 02:50:50,918 INFO L82 PathProgramCache]: Analyzing trace with hash 197950760, now seen corresponding path program 1 times [2018-01-21 02:50:50,918 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:50,919 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:50,919 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:50,919 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:50,919 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:50,925 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 02:50:50,925 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 02:50:50,925 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 02:50:50,933 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:50,934 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 02:50:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:50,978 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-21 02:50:50,978 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 02:50:50,978 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 02:50:50,978 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 02:50:50,990 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:50,990 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 02:50:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:51,012 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 02:50:51,046 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 02:50:51,046 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 02:50:51,058 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 02:50:51,092 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:50:51,093 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2018-01-21 02:50:51,093 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:50:51,093 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 02:50:51,093 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 02:50:51,094 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 02:50:51,094 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 4 states. [2018-01-21 02:50:51,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 02:50:51,122 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2018-01-21 02:50:51,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 02:50:51,123 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-01-21 02:50:51,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 02:50:51,124 INFO L225 Difference]: With dead ends: 52 [2018-01-21 02:50:51,124 INFO L226 Difference]: Without dead ends: 38 [2018-01-21 02:50:51,124 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 02:50:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-21 02:50:51,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2018-01-21 02:50:51,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-21 02:50:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-01-21 02:50:51,128 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 25 [2018-01-21 02:50:51,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 02:50:51,129 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-01-21 02:50:51,129 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 02:50:51,129 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-01-21 02:50:51,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 02:50:51,130 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 02:50:51,130 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, 1, 1, 1, 1, 1, 1, 1, 1] [2018-01-21 02:50:51,130 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 02:50:51,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1753910501, now seen corresponding path program 1 times [2018-01-21 02:50:51,130 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 02:50:51,131 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:51,131 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:51,132 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 02:50:51,132 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 02:50:51,137 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 02:50:51,138 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 02:50:51,138 INFO L164 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 02:50:51,148 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 02:50:51,148 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 02:50:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 02:50:51,176 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-01-21 02:50:51,176 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [10], [14], [17], [21], [22], [23], [24], [32], [36], [39], [41], [42], [43], [45], [49], [53], [56], [67], [68], [69], [70], [71], [73], [74], [75], [76] [2018-01-21 02:50:51,177 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 02:50:51,177 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 02:50:54,732 INFO L262 AbstractInterpreter]: Error location(s) were unreachable [2018-01-21 02:50:54,733 INFO L268 AbstractInterpreter]: Visited 29 different actions 44 times. Merged at 14 different actions 14 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 27 variables. [2018-01-21 02:50:54,735 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates [2018-01-21 02:51:11,324 INFO L232 lantSequenceWeakener]: Weakened 29 states. On average, predicates are now at 64.25% of their original sizes. [2018-01-21 02:51:11,324 INFO L408 sIntCurrentIteration]: Unifying AI predicates [2018-01-21 02:51:11,871 INFO L419 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-01-21 02:51:11,872 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 02:51:11,872 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-01-21 02:51:11,872 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 02:51:11,873 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-21 02:51:11,873 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-21 02:51:11,873 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-01-21 02:51:11,873 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 17 states. Received shutdown request... [2018-01-21 02:51:19,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-01-21 02:51:19,326 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 02:51:19,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 02:51:19 BoogieIcfgContainer [2018-01-21 02:51:19,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 02:51:19,330 INFO L168 Benchmark]: Toolchain (without parser) took 57891.88 ms. Allocated memory was 305.7 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 263.8 MB in the beginning and 797.1 MB in the end (delta: -533.3 MB). Peak memory consumption was 1.3 GB. Max. memory is 5.3 GB. [2018-01-21 02:51:19,331 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 305.7 MB. Free memory is still 269.8 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 02:51:19,331 INFO L168 Benchmark]: CACSL2BoogieTranslator took 215.82 ms. Allocated memory is still 305.7 MB. Free memory was 262.8 MB in the beginning and 252.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 02:51:19,331 INFO L168 Benchmark]: Boogie Preprocessor took 37.36 ms. Allocated memory is still 305.7 MB. Free memory was 252.8 MB in the beginning and 251.8 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. [2018-01-21 02:51:19,332 INFO L168 Benchmark]: RCFGBuilder took 276.66 ms. Allocated memory is still 305.7 MB. Free memory was 250.8 MB in the beginning and 234.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 5.3 GB. [2018-01-21 02:51:19,332 INFO L168 Benchmark]: TraceAbstraction took 57355.04 ms. Allocated memory was 305.7 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 234.7 MB in the beginning and 797.1 MB in the end (delta: -562.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 5.3 GB. [2018-01-21 02:51:19,334 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 305.7 MB. Free memory is still 269.8 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 215.82 ms. Allocated memory is still 305.7 MB. Free memory was 262.8 MB in the beginning and 252.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 37.36 ms. Allocated memory is still 305.7 MB. Free memory was 252.8 MB in the beginning and 251.8 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 5.3 GB. * RCFGBuilder took 276.66 ms. Allocated memory is still 305.7 MB. Free memory was 250.8 MB in the beginning and 234.7 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 5.3 GB. * TraceAbstraction took 57355.04 ms. Allocated memory was 305.7 MB in the beginning and 2.2 GB in the end (delta: 1.9 GB). Free memory was 234.7 MB in the beginning and 797.1 MB in the end (delta: -562.4 MB). Peak memory consumption was 1.3 GB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 30 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 2 LocStat_NO_SUPPORTING_EQUALITIES : 403 LocStat_NO_SUPPORTING_DISEQUALITIES : 70 LocStat_NO_DISJUNCTIONS : -60 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 35 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 46 TransStat_NO_SUPPORTING_DISEQUALITIES : 13 TransStat_NO_DISJUNCTIONS : 38 TransStat_MAX_NO_DISJUNCTIONS : 4 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 5.075751 RENAME_VARIABLES(MILLISECONDS) : 0.019627 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 4.766810 PROJECTAWAY(MILLISECONDS) : 140.904369 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.075527 DISJOIN(MILLISECONDS) : 2.638421 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.041472 ADD_EQUALITY(MILLISECONDS) : 0.025319 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.017163 #CONJOIN_DISJUNCTIVE : 77 #RENAME_VARIABLES : 141 #UNFREEZE : 0 #CONJOIN : 121 #PROJECTAWAY : 116 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 13 #RENAME_VARIABLES_DISJUNCTIVE : 138 #ADD_EQUALITY : 44 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 7 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 30 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 2 LocStat_NO_SUPPORTING_EQUALITIES : 423 LocStat_NO_SUPPORTING_DISEQUALITIES : 70 LocStat_NO_DISJUNCTIONS : -60 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 35 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 47 TransStat_NO_SUPPORTING_DISEQUALITIES : 13 TransStat_NO_DISJUNCTIONS : 38 TransStat_MAX_NO_DISJUNCTIONS : 4 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 4.054001 RENAME_VARIABLES(MILLISECONDS) : 0.012847 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 3.861445 PROJECTAWAY(MILLISECONDS) : 86.597640 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.056058 DISJOIN(MILLISECONDS) : 1.623143 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.032038 ADD_EQUALITY(MILLISECONDS) : 0.021763 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.012427 #CONJOIN_DISJUNCTIVE : 77 #RENAME_VARIABLES : 141 #UNFREEZE : 0 #CONJOIN : 121 #PROJECTAWAY : 116 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 13 #RENAME_VARIABLES_DISJUNCTIVE : 138 #ADD_EQUALITY : 45 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 7 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 30 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 2 LocStat_NO_SUPPORTING_EQUALITIES : 425 LocStat_NO_SUPPORTING_DISEQUALITIES : 70 LocStat_NO_DISJUNCTIONS : -60 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 35 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 47 TransStat_NO_SUPPORTING_DISEQUALITIES : 13 TransStat_NO_DISJUNCTIONS : 38 TransStat_MAX_NO_DISJUNCTIONS : 4 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 2.692374 RENAME_VARIABLES(MILLISECONDS) : 0.011894 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 2.530960 PROJECTAWAY(MILLISECONDS) : 108.016348 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.057161 DISJOIN(MILLISECONDS) : 1.709352 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.022875 ADD_EQUALITY(MILLISECONDS) : 0.016323 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.013274 #CONJOIN_DISJUNCTIVE : 77 #RENAME_VARIABLES : 141 #UNFREEZE : 0 #CONJOIN : 121 #PROJECTAWAY : 116 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 13 #RENAME_VARIABLES_DISJUNCTIVE : 138 #ADD_EQUALITY : 45 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 7 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 30 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 2 LocStat_NO_SUPPORTING_EQUALITIES : 445 LocStat_NO_SUPPORTING_DISEQUALITIES : 70 LocStat_NO_DISJUNCTIONS : -60 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 35 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 48 TransStat_NO_SUPPORTING_DISEQUALITIES : 13 TransStat_NO_DISJUNCTIONS : 38 TransStat_MAX_NO_DISJUNCTIONS : 4 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 2.761080 RENAME_VARIABLES(MILLISECONDS) : 0.012025 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 2.618295 PROJECTAWAY(MILLISECONDS) : 101.712339 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.057355 DISJOIN(MILLISECONDS) : 1.627447 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.023155 ADD_EQUALITY(MILLISECONDS) : 0.014758 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.011127 #CONJOIN_DISJUNCTIVE : 77 #RENAME_VARIABLES : 141 #UNFREEZE : 0 #CONJOIN : 121 #PROJECTAWAY : 116 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 13 #RENAME_VARIABLES_DISJUNCTIVE : 138 #ADD_EQUALITY : 46 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 7 - StatisticsResult: ArrayEqualityDomainStatistics #Locations : 27 LocStat_MAX_WEQGRAPH_SIZE : 3 LocStat_MAX_SIZEOF_WEQEDGELABEL : 2 LocStat_NO_SUPPORTING_EQUALITIES : 364 LocStat_NO_SUPPORTING_DISEQUALITIES : 66 LocStat_NO_DISJUNCTIONS : -54 LocStat_MAX_NO_DISJUNCTIONS : -1 #Transitions : 33 TransStat_MAX_WEQGRAPH_SIZE : 2 TransStat_MAX_SIZEOF_WEQEDGELABEL : 1 TransStat_NO_SUPPORTING_EQUALITIES : 44 TransStat_NO_SUPPORTING_DISEQUALITIES : 13 TransStat_NO_DISJUNCTIONS : 36 TransStat_MAX_NO_DISJUNCTIONS : 4 - StatisticsResult: EqConstraintFactoryStatistics CONJOIN_DISJUNCTIVE(MILLISECONDS) : 0.562186 RENAME_VARIABLES(MILLISECONDS) : 2.100825 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.511408 PROJECTAWAY(MILLISECONDS) : 65.607369 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.090993 DISJOIN(MILLISECONDS) : 2.420535 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 2.167993 ADD_EQUALITY(MILLISECONDS) : 0.045827 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.047906 #CONJOIN_DISJUNCTIVE : 73 #RENAME_VARIABLES : 124 #UNFREEZE : 0 #CONJOIN : 105 #PROJECTAWAY : 93 #ADD_WEAK_EQUALITY : 9 #DISJOIN : 12 #RENAME_VARIABLES_DISJUNCTIVE : 121 #ADD_EQUALITY : 42 #DISJOIN_DISJUNCTIVE : 0 #ADD_DISEQUALITY : 7 * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: - StatisticsResult: Ultimate Automizer benchmark data for error location: ULTIMATE.initErr0EnsuresViolation CFG has 3 procedures, 42 locations, 3 error locations. UNSAFE Result, 0.1s OverallTime, 1 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, REUSE_STATISTICS: No data available - CounterExampleResult [Line: 1]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L541] int i, j; [L542] int length = __VERIFIER_nondet_int(); [L543] COND TRUE length < 1 || length >= 2147483647 / sizeof(int) [L543] length = 1 VAL [length=1] [L544] int fac = __VERIFIER_nondet_int(); [L545] COND TRUE fac < 1 || fac >= 2147483647 / (sizeof(int) * length) [L545] fac = 1 VAL [fac=1, length=1] [L546] EXPR, FCALL __builtin_alloca (length*sizeof(int)) VAL [__builtin_alloca (length*sizeof(int))={7:0}, fac=1, length=1] [L546] int *arr = __builtin_alloca (length*sizeof(int)); VAL [__builtin_alloca (length*sizeof(int))={7:0}, arr={7:0}, fac=1, length=1] [L547] EXPR, FCALL __builtin_alloca (fac*length*sizeof(int)) VAL [__builtin_alloca (fac*length*sizeof(int))={9:0}, __builtin_alloca (length*sizeof(int))={7:0}, arr={7:0}, fac=1, length=1] [L547] int *arr2 = __builtin_alloca (fac*length*sizeof(int)); VAL [__builtin_alloca (fac*length*sizeof(int))={9:0}, __builtin_alloca (length*sizeof(int))={7:0}, arr={7:0}, arr2={9:0}, fac=1, length=1] [L548] COND FALSE !(!arr || !arr2) [L549] i=0 VAL [__builtin_alloca (fac*length*sizeof(int))={9:0}, __builtin_alloca (length*sizeof(int))={7:0}, arr={7:0}, arr2={9:0}, fac=1, i=0, length=1] [L549] COND TRUE i