java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf -i ../../../trunk/examples/svcomp/array-memsafety/mult_array_unsafe_false-valid-deref.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:12:37,355 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:12:37,384 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:12:37,399 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:12:37,399 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:12:37,400 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:12:37,401 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:12:37,403 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:12:37,405 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:12:37,406 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:12:37,406 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:12:37,406 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:12:37,407 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:12:37,408 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:12:37,408 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:12:37,411 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:12:37,413 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:12:37,415 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:12:37,416 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:12:37,418 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:12:37,420 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 08:12:37,425 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:12:37,426 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:12:37,426 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/eq-bench/mempurity-32bit-Automizer_Taipan+AI_EQ_preciseopt.epf [2018-01-21 08:12:37,436 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:12:37,436 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:12:37,437 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:12:37,437 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:12:37,437 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:12:37,438 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:12:37,438 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:12:37,438 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:12:37,438 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:12:37,439 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:12:37,439 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:12:37,439 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:12:37,439 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:12:37,439 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:12:37,440 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:12:37,440 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:12:37,440 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:12:37,440 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:12:37,440 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:12:37,441 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:12:37,441 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:12:37,441 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:12:37,441 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:12:37,441 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:12:37,442 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:12:37,442 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:12:37,442 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:12:37,442 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:12:37,442 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:12:37,443 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:12:37,443 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:12:37,443 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:12:37,443 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:12:37,443 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:12:37,444 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:12:37,444 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:12:37,444 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:12:37,444 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:12:37,445 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:12:37,445 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:12:37,479 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:12:37,491 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:12:37,495 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:12:37,497 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:12:37,497 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:12:37,498 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/mult_array_unsafe_false-valid-deref.i [2018-01-21 08:12:37,677 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:12:37,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:12:37,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:12:37,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:12:37,689 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:12:37,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:12:37" (1/1) ... [2018-01-21 08:12:37,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@719878db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:12:37, skipping insertion in model container [2018-01-21 08:12:37,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:12:37" (1/1) ... [2018-01-21 08:12:37,710 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:12:37,750 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:12:37,860 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:12:37,882 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:12:37,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:12:37 WrapperNode [2018-01-21 08:12:37,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:12:37,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:12:37,891 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:12:37,891 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:12:37,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:12:37" (1/1) ... [2018-01-21 08:12:37,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:12:37" (1/1) ... [2018-01-21 08:12:37,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:12:37" (1/1) ... [2018-01-21 08:12:37,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:12:37" (1/1) ... [2018-01-21 08:12:37,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:12:37" (1/1) ... [2018-01-21 08:12:37,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:12:37" (1/1) ... [2018-01-21 08:12:37,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:12:37" (1/1) ... [2018-01-21 08:12:37,918 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:12:37,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:12:37,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:12:37,919 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:12:37,920 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:12:37" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:12:37,964 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:12:37,964 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:12:37,964 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:12:37,965 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:12:37,965 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:12:37,965 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:12:37,965 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:12:37,965 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:12:37,965 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:12:37,965 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:12:37,966 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:12:37,966 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:12:38,146 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:12:38,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:12:38 BoogieIcfgContainer [2018-01-21 08:12:38,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:12:38,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:12:38,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:12:38,149 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:12:38,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:12:37" (1/3) ... [2018-01-21 08:12:38,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22df62b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:12:38, skipping insertion in model container [2018-01-21 08:12:38,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:12:37" (2/3) ... [2018-01-21 08:12:38,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22df62b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:12:38, skipping insertion in model container [2018-01-21 08:12:38,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:12:38" (3/3) ... [2018-01-21 08:12:38,152 INFO L105 eAbstractionObserver]: Analyzing ICFG mult_array_unsafe_false-valid-deref.i [2018-01-21 08:12:38,160 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:12:38,165 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 08:12:38,212 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:12:38,212 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:12:38,212 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:12:38,212 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:12:38,212 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:12:38,212 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:12:38,213 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:12:38,213 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:12:38,214 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:12:38,234 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 08:12:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:12:38,241 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:12:38,242 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:12:38,242 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:12:38,247 INFO L82 PathProgramCache]: Analyzing trace with hash 100907, now seen corresponding path program 1 times [2018-01-21 08:12:38,250 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:12:38,303 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:12:38,303 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:12:38,303 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:12:38,303 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:12:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:12:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:12:38,359 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:12:38,366 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:12:38,372 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:12:38,372 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:12:38,373 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:12:38,373 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:12:38,373 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:12:38,373 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:12:38,373 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:12:38,373 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:12:38,374 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:12:38,375 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 08:12:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 08:12:38,377 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:12:38,377 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 08:12:38,377 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:12:38,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1756096489, now seen corresponding path program 1 times [2018-01-21 08:12:38,378 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:12:38,379 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:12:38,379 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:12:38,379 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:12:38,379 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:12:38,398 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 08:12:38,398 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 08:12:38,398 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 08:12:38,408 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:12:38,408 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 08:12:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:12:38,458 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-21 08:12:38,460 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 08:12:38,460 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:12:38,460 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 08:12:38,466 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:12:38,467 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 08:12:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:12:38,516 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 08:12:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:12:38,619 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 08:12:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:12:38,726 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:12:38,726 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2018-01-21 08:12:38,726 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:12:38,729 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 08:12:38,805 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 08:12:38,805 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-21 08:12:38,808 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2018-01-21 08:12:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:12:38,931 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 08:12:38,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 08:12:38,932 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-01-21 08:12:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:12:38,941 INFO L225 Difference]: With dead ends: 60 [2018-01-21 08:12:38,941 INFO L226 Difference]: Without dead ends: 35 [2018-01-21 08:12:38,944 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 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 08:12:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-21 08:12:38,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-21 08:12:38,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-21 08:12:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-01-21 08:12:38,976 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 21 [2018-01-21 08:12:38,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:12:38,977 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-01-21 08:12:38,977 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 08:12:38,977 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-01-21 08:12:38,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 08:12:38,978 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:12:38,978 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 08:12:38,978 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:12:38,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1252120768, now seen corresponding path program 1 times [2018-01-21 08:12:38,978 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:12:38,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:12:38,979 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:12:38,979 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:12:38,980 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:12:38,988 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 08:12:38,988 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 08:12:38,988 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 08:12:38,994 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:12:38,995 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 08:12:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:12:39,028 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-21 08:12:39,028 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 08:12:39,028 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:12:39,028 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 08:12:39,033 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:12:39,033 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 08:12:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:12:39,052 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 08:12:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:12:39,091 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 08:12:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-01-21 08:12:39,153 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:12:39,153 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2018-01-21 08:12:39,153 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:12:39,154 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 08:12:39,154 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 08:12:39,154 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:12:39,155 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 4 states. [2018-01-21 08:12:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:12:39,189 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2018-01-21 08:12:39,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 08:12:39,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-01-21 08:12:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:12:39,191 INFO L225 Difference]: With dead ends: 56 [2018-01-21 08:12:39,192 INFO L226 Difference]: Without dead ends: 40 [2018-01-21 08:12:39,193 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 08:12:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-21 08:12:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2018-01-21 08:12:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-21 08:12:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-21 08:12:39,199 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2018-01-21 08:12:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:12:39,200 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-21 08:12:39,200 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 08:12:39,200 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-21 08:12:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 08:12:39,201 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:12:39,201 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 08:12:39,201 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:12:39,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1880809997, now seen corresponding path program 1 times [2018-01-21 08:12:39,202 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:12:39,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:12:39,203 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:12:39,203 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:12:39,203 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:12:39,211 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 08:12:39,211 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 08:12:39,211 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) [2018-01-21 08:12:39,223 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:12:39,223 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 08:12:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:12:39,266 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-01-21 08:12:39,269 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 08:12:39,314 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:12:39,314 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown