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-alloca_true-valid-memsafety_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-2f49842 [2018-01-21 08:16:30,431 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-01-21 08:16:30,433 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-01-21 08:16:30,447 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-01-21 08:16:30,447 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-01-21 08:16:30,448 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-01-21 08:16:30,449 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-01-21 08:16:30,452 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-01-21 08:16:30,454 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-01-21 08:16:30,455 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-01-21 08:16:30,455 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-01-21 08:16:30,456 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-01-21 08:16:30,457 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-01-21 08:16:30,459 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-01-21 08:16:30,460 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-01-21 08:16:30,462 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-01-21 08:16:30,465 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-01-21 08:16:30,467 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-01-21 08:16:30,468 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-01-21 08:16:30,470 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-01-21 08:16:30,472 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-01-21 08:16:30,477 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-01-21 08:16:30,478 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-01-21 08:16:30,479 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 08:16:30,489 INFO L110 SettingsManager]: Loading preferences was successful [2018-01-21 08:16:30,489 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-01-21 08:16:30,490 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-01-21 08:16:30,491 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-01-21 08:16:30,491 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-01-21 08:16:30,491 INFO L133 SettingsManager]: * Weq Fattening=true [2018-01-21 08:16:30,491 INFO L133 SettingsManager]: * Flatten before fatten=true [2018-01-21 08:16:30,491 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=VPDomain [2018-01-21 08:16:30,492 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-01-21 08:16:30,492 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-01-21 08:16:30,493 INFO L133 SettingsManager]: * sizeof long=4 [2018-01-21 08:16:30,493 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-01-21 08:16:30,493 INFO L133 SettingsManager]: * Check allocation purity=true [2018-01-21 08:16:30,493 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-01-21 08:16:30,493 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-01-21 08:16:30,493 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-01-21 08:16:30,494 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-01-21 08:16:30,494 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-01-21 08:16:30,494 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-01-21 08:16:30,494 INFO L133 SettingsManager]: * sizeof long double=12 [2018-01-21 08:16:30,494 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-01-21 08:16:30,495 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-01-21 08:16:30,495 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-01-21 08:16:30,495 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-01-21 08:16:30,495 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-01-21 08:16:30,495 INFO L133 SettingsManager]: * Add additional assume for each assert=false [2018-01-21 08:16:30,496 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-01-21 08:16:30,496 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-01-21 08:16:30,496 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-01-21 08:16:30,496 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-01-21 08:16:30,497 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-01-21 08:16:30,497 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-01-21 08:16:30,497 INFO L133 SettingsManager]: * Stop after first violation was found=false [2018-01-21 08:16:30,497 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-01-21 08:16:30,497 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-01-21 08:16:30,497 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-01-21 08:16:30,498 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-01-21 08:16:30,498 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-01-21 08:16:30,499 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-01-21 08:16:30,499 INFO L133 SettingsManager]: * TransformationType=HEAP_SEPARATOR [2018-01-21 08:16:30,535 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-01-21 08:16:30,549 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully initialized [2018-01-21 08:16:30,554 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-01-21 08:16:30,556 INFO L271 PluginConnector]: Initializing CDTParser... [2018-01-21 08:16:30,556 INFO L276 PluginConnector]: CDTParser initialized [2018-01-21 08:16:30,557 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-memsafety/mult_array-alloca_true-valid-memsafety_true-termination.i [2018-01-21 08:16:30,741 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-01-21 08:16:30,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-01-21 08:16:30,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-01-21 08:16:30,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-01-21 08:16:30,753 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-01-21 08:16:30,754 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:16:30" (1/1) ... [2018-01-21 08:16:30,757 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2fa6e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:16:30, skipping insertion in model container [2018-01-21 08:16:30,757 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.01 08:16:30" (1/1) ... [2018-01-21 08:16:30,777 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:16:30,819 INFO L153 Dispatcher]: Using SV-COMP mode [2018-01-21 08:16:30,948 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:16:30,966 INFO L450 PostProcessor]: Settings: Checked method=main [2018-01-21 08:16:30,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:16:30 WrapperNode [2018-01-21 08:16:30,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-01-21 08:16:30,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-01-21 08:16:30,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-01-21 08:16:30,975 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-01-21 08:16:30,992 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:16:30" (1/1) ... [2018-01-21 08:16:30,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:16:30" (1/1) ... [2018-01-21 08:16:31,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:16:30" (1/1) ... [2018-01-21 08:16:31,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:16:30" (1/1) ... [2018-01-21 08:16:31,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:16:30" (1/1) ... [2018-01-21 08:16:31,009 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:16:30" (1/1) ... [2018-01-21 08:16:31,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:16:30" (1/1) ... [2018-01-21 08:16:31,013 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-01-21 08:16:31,013 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-01-21 08:16:31,014 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-01-21 08:16:31,014 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-01-21 08:16:31,015 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:16:30" (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 08:16:31,071 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-01-21 08:16:31,072 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-01-21 08:16:31,072 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-01-21 08:16:31,072 INFO L128 BoogieDeclarations]: Found specification of procedure write~int [2018-01-21 08:16:31,072 INFO L128 BoogieDeclarations]: Found specification of procedure read~int [2018-01-21 08:16:31,072 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.free [2018-01-21 08:16:31,072 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-01-21 08:16:31,072 INFO L128 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-01-21 08:16:31,072 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-01-21 08:16:31,072 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-01-21 08:16:31,073 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-01-21 08:16:31,073 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-01-21 08:16:31,264 INFO L257 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-01-21 08:16:31,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:16:31 BoogieIcfgContainer [2018-01-21 08:16:31,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-01-21 08:16:31,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-01-21 08:16:31,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-01-21 08:16:31,268 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-01-21 08:16:31,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.01 08:16:30" (1/3) ... [2018-01-21 08:16:31,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c60ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:16:31, skipping insertion in model container [2018-01-21 08:16:31,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.01 08:16:30" (2/3) ... [2018-01-21 08:16:31,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12c60ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.01 08:16:31, skipping insertion in model container [2018-01-21 08:16:31,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.01 08:16:31" (3/3) ... [2018-01-21 08:16:31,272 INFO L105 eAbstractionObserver]: Analyzing ICFG mult_array-alloca_true-valid-memsafety_true-termination.i [2018-01-21 08:16:31,279 INFO L130 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-01-21 08:16:31,284 INFO L142 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2018-01-21 08:16:31,319 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:16:31,319 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:16:31,319 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:16:31,319 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:16:31,319 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:16:31,320 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:16:31,320 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:16:31,320 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.initErr0EnsuresViolation======== [2018-01-21 08:16:31,320 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:16:31,341 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 08:16:31,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2018-01-21 08:16:31,348 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:16:31,349 INFO L322 BasicCegarLoop]: trace histogram [1, 1, 1] [2018-01-21 08:16:31,350 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.initErr0EnsuresViolation]=== [2018-01-21 08:16:31,355 INFO L82 PathProgramCache]: Analyzing trace with hash 100907, now seen corresponding path program 1 times [2018-01-21 08:16:31,358 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:16:31,402 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:31,402 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:31,403 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:31,403 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:16:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:16:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:16:31,454 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:16:31,460 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:16:31,465 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:16:31,466 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:16:31,466 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:16:31,466 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:16:31,466 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:16:31,466 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:16:31,466 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:16:31,466 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.startErr0EnsuresViolation======== [2018-01-21 08:16:31,466 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:16:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 08:16:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-01-21 08:16:31,469 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:16:31,469 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 08:16:31,469 INFO L371 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:16:31,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1756096489, now seen corresponding path program 1 times [2018-01-21 08:16:31,469 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:16:31,470 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:31,471 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:31,471 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:31,471 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:16:31,487 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 08:16:31,487 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 08:16:31,487 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 08:16:31,493 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:31,494 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 08:16:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:31,529 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-21 08:16:31,531 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 08:16:31,531 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:16:31,531 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 08:16:31,538 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:31,539 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 08:16:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:31,588 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 08:16:31,719 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 08:16:31,719 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 08:16:31,757 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 08:16:31,779 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:16:31,780 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2018-01-21 08:16:31,780 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:16:31,782 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 08:16:31,873 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 08:16:31,874 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-21 08:16:31,876 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2018-01-21 08:16:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:16:31,989 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 08:16:31,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 08:16:31,991 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2018-01-21 08:16:31,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:16:31,999 INFO L225 Difference]: With dead ends: 60 [2018-01-21 08:16:31,999 INFO L226 Difference]: Without dead ends: 35 [2018-01-21 08:16:32,002 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2018-01-21 08:16:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-01-21 08:16:32,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-01-21 08:16:32,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-21 08:16:32,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-01-21 08:16:32,034 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 21 [2018-01-21 08:16:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:16:32,035 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-01-21 08:16:32,035 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 08:16:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-01-21 08:16:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-01-21 08:16:32,036 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:16:32,036 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 08:16:32,036 INFO L371 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:16:32,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1252120768, now seen corresponding path program 1 times [2018-01-21 08:16:32,036 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:16:32,037 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:32,038 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:32,038 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:32,038 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:16:32,048 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 08:16:32,048 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 08:16:32,048 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 08:16:32,057 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:32,057 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 08:16:32,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:32,101 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-21 08:16:32,101 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 08:16:32,101 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:16:32,101 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 08:16:32,106 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:32,106 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 08:16:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:32,126 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 08:16:32,157 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 08:16:32,158 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 08:16:32,180 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 08:16:32,204 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:16:32,204 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2018-01-21 08:16:32,204 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:16:32,205 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 08:16:32,205 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 08:16:32,205 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:16:32,205 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 4 states. [2018-01-21 08:16:32,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:16:32,268 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2018-01-21 08:16:32,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 08:16:32,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2018-01-21 08:16:32,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:16:32,271 INFO L225 Difference]: With dead ends: 56 [2018-01-21 08:16:32,271 INFO L226 Difference]: Without dead ends: 40 [2018-01-21 08:16:32,272 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 08:16:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-01-21 08:16:32,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2018-01-21 08:16:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-01-21 08:16:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2018-01-21 08:16:32,281 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2018-01-21 08:16:32,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:16:32,281 INFO L432 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2018-01-21 08:16:32,281 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 08:16:32,282 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2018-01-21 08:16:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 08:16:32,284 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:16:32,284 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 08:16:32,284 INFO L371 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:16:32,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1880809997, now seen corresponding path program 1 times [2018-01-21 08:16:32,284 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:16:32,285 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:32,286 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:32,286 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:32,286 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:16:32,295 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 08:16:32,295 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 08:16:32,295 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 08:16:32,304 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:32,304 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 08:16:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:32,345 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-01-21 08:16:32,348 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 08:16:32,390 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:16:32,390 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 08:16:42,853 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 08:16:42,854 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 08:16:42,872 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 08:16:42,872 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:16:42,873 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 08:16:42,878 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:42,878 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 08:16:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:42,899 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 08:16:42,929 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 08:16:42,930 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 08:16:43,051 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 08:16:43,073 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:16:43,073 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2018-01-21 08:16:43,074 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:16:43,074 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:16:43,074 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:16:43,075 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 08:16:43,075 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 5 states. [2018-01-21 08:16:43,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:16:43,190 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2018-01-21 08:16:43,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:16:43,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-01-21 08:16:43,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:16:43,196 INFO L225 Difference]: With dead ends: 102 [2018-01-21 08:16:43,196 INFO L226 Difference]: Without dead ends: 93 [2018-01-21 08:16:43,197 INFO L525 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 08:16:43,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-01-21 08:16:43,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 54. [2018-01-21 08:16:43,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-21 08:16:43,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-21 08:16:43,207 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2018-01-21 08:16:43,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:16:43,207 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-21 08:16:43,207 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:16:43,208 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-21 08:16:43,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 08:16:43,209 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:16:43,209 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 08:16:43,209 INFO L371 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:16:43,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2014823503, now seen corresponding path program 1 times [2018-01-21 08:16:43,210 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:16:43,211 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:43,211 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:43,211 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:43,212 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:16:43,222 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 08:16:43,222 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 08:16:43,222 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 08:16:43,233 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:43,233 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 08:16:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:43,276 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-01-21 08:16:43,277 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 08:16:43,278 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:16:43,279 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 08:16:49,382 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 08:16:49,382 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 08:16:49,386 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 08:16:49,386 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:16:49,386 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 08:16:49,391 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:49,392 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 08:16:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:49,407 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 08:16:49,425 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 08:16:49,425 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 08:16:49,478 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 08:16:49,513 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:16:49,513 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2018-01-21 08:16:49,513 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:16:49,513 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:16:49,513 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:16:49,514 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-01-21 08:16:49,514 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 5 states. [2018-01-21 08:16:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:16:49,565 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2018-01-21 08:16:49,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:16:49,565 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-01-21 08:16:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:16:49,567 INFO L225 Difference]: With dead ends: 95 [2018-01-21 08:16:49,567 INFO L226 Difference]: Without dead ends: 86 [2018-01-21 08:16:49,568 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 08:16:49,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-01-21 08:16:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2018-01-21 08:16:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-21 08:16:49,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-21 08:16:49,577 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2018-01-21 08:16:49,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:16:49,577 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-21 08:16:49,577 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:16:49,577 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-21 08:16:49,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 08:16:49,578 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:16:49,579 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 08:16:49,579 INFO L371 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:16:49,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1818770383, now seen corresponding path program 1 times [2018-01-21 08:16:49,579 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:16:49,580 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:49,580 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:49,581 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:49,581 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:16:49,587 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 08:16:49,587 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 08:16:49,588 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 08:16:49,598 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:49,598 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 08:16:49,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:49,628 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-01-21 08:16:49,628 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 08:16:49,629 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:16:49,630 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 08:16:53,474 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 08:16:53,474 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 08:16:53,476 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 08:16:53,476 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:16:53,476 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 08:16:53,481 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:53,481 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 08:16:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:53,493 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 08:16:53,509 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 08:16:53,509 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 08:16:53,547 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 08:16:53,577 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:16:53,577 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2018-01-21 08:16:53,577 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:16:53,577 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:16:53,577 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:16:53,578 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 08:16:53,578 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 5 states. [2018-01-21 08:16:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:16:53,620 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2018-01-21 08:16:53,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:16:53,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-01-21 08:16:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:16:53,622 INFO L225 Difference]: With dead ends: 110 [2018-01-21 08:16:53,623 INFO L226 Difference]: Without dead ends: 101 [2018-01-21 08:16:53,623 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 08:16:53,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-01-21 08:16:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 54. [2018-01-21 08:16:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-01-21 08:16:53,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2018-01-21 08:16:53,631 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2018-01-21 08:16:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:16:53,631 INFO L432 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2018-01-21 08:16:53,631 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:16:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2018-01-21 08:16:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-01-21 08:16:53,632 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:16:53,632 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 08:16:53,632 INFO L371 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:16:53,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1952783889, now seen corresponding path program 1 times [2018-01-21 08:16:53,632 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:16:53,633 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:53,633 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:53,633 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:53,633 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:16:53,639 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 08:16:53,639 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 08:16:53,640 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 08:16:53,651 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:53,652 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 08:16:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:53,681 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-01-21 08:16:53,681 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 08:16:53,682 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:16:53,682 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 08:16:57,021 INFO L259 AbstractInterpreter]: Some error location(s) were reachable [2018-01-21 08:16:57,021 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 08:16:57,023 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-01-21 08:16:57,023 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:16:57,023 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 08:16:57,028 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:57,028 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 08:16:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:57,042 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 08:16:57,059 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 08:16:57,060 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 08:16:57,099 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 08:16:57,122 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:16:57,122 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2018-01-21 08:16:57,122 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:16:57,122 INFO L409 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-01-21 08:16:57,122 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-01-21 08:16:57,122 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-01-21 08:16:57,123 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 5 states. [2018-01-21 08:16:57,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:16:57,157 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2018-01-21 08:16:57,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-01-21 08:16:57,158 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-01-21 08:16:57,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:16:57,159 INFO L225 Difference]: With dead ends: 69 [2018-01-21 08:16:57,159 INFO L226 Difference]: Without dead ends: 60 [2018-01-21 08:16:57,159 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 08:16:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-01-21 08:16:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2018-01-21 08:16:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-01-21 08:16:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-01-21 08:16:57,165 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2018-01-21 08:16:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:16:57,166 INFO L432 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-01-21 08:16:57,166 INFO L433 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-01-21 08:16:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-01-21 08:16:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-01-21 08:16:57,167 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:16:57,167 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 08:16:57,167 INFO L371 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0EnsuresViolation]=== [2018-01-21 08:16:57,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1166525403, now seen corresponding path program 1 times [2018-01-21 08:16:57,167 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:16:57,168 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:57,168 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:57,169 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:57,169 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:16:57,175 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 08:16:57,176 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 08:16:57,176 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 08:16:57,181 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:57,181 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 08:16:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:16:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-01-21 08:16:57,262 INFO L381 BasicCegarLoop]: Counterexample might be feasible [2018-01-21 08:16:57,272 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:16:57,279 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:16:57,279 WARN L343 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2018-01-21 08:16:57,295 INFO L322 AbstractCegarLoop]: Interprodecural is true [2018-01-21 08:16:57,295 INFO L323 AbstractCegarLoop]: Hoare is true [2018-01-21 08:16:57,295 INFO L324 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-01-21 08:16:57,295 INFO L325 AbstractCegarLoop]: Backedges is TWOTRACK [2018-01-21 08:16:57,296 INFO L326 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-01-21 08:16:57,296 INFO L327 AbstractCegarLoop]: Difference is false [2018-01-21 08:16:57,296 INFO L328 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-01-21 08:16:57,296 INFO L333 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == mainErr0EnsuresViolation======== [2018-01-21 08:16:57,296 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-01-21 08:16:57,297 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2018-01-21 08:16:57,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-01-21 08:16:57,298 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:16:57,298 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 08:16:57,298 INFO L371 AbstractCegarLoop]: === Iteration 1 === [mainErr0EnsuresViolation]=== [2018-01-21 08:16:57,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2112136767, now seen corresponding path program 1 times [2018-01-21 08:16:57,299 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:16:57,299 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:57,300 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:57,300 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:57,300 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:16:57,305 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 08:16:57,306 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 08:16:57,306 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) [2018-01-21 08:16:57,314 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:57,314 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 08:16:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:57,348 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-21 08:16:57,348 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 08:16:57,348 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:16:57,349 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 08:16:57,354 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:57,354 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 08:16:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:57,367 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 08:16:57,405 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 08:16:57,406 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 08:16:57,410 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 08:16:57,432 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:16:57,432 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2018-01-21 08:16:57,432 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:16:57,433 INFO L409 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-01-21 08:16:57,433 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-01-21 08:16:57,433 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-01-21 08:16:57,433 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 6 states. [2018-01-21 08:16:57,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:16:57,488 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2018-01-21 08:16:57,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-01-21 08:16:57,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2018-01-21 08:16:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:16:57,489 INFO L225 Difference]: With dead ends: 60 [2018-01-21 08:16:57,489 INFO L226 Difference]: Without dead ends: 33 [2018-01-21 08:16:57,490 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 08:16:57,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-01-21 08:16:57,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-01-21 08:16:57,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-01-21 08:16:57,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2018-01-21 08:16:57,492 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 19 [2018-01-21 08:16:57,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:16:57,493 INFO L432 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2018-01-21 08:16:57,493 INFO L433 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-01-21 08:16:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2018-01-21 08:16:57,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-01-21 08:16:57,493 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:16:57,493 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 08:16:57,494 INFO L371 AbstractCegarLoop]: === Iteration 2 === [mainErr0EnsuresViolation]=== [2018-01-21 08:16:57,494 INFO L82 PathProgramCache]: Analyzing trace with hash 197950760, now seen corresponding path program 1 times [2018-01-21 08:16:57,494 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:16:57,495 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:57,495 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:57,495 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:57,495 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:16:57,500 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 08:16:57,500 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 08:16:57,500 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 08:16:57,511 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:57,511 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 08:16:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:57,554 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2018-01-21 08:16:57,554 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 08:16:57,554 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:16:57,554 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 08:16:57,571 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:57,572 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 08:16:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:57,598 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 08:16:57,625 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 08:16:57,626 INFO L314 TraceCheckSpWp]: Computing backward predicates... [2018-01-21 08:16:57,637 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 08:16:57,669 INFO L320 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:16:57,669 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2018-01-21 08:16:57,669 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:16:57,670 INFO L409 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-01-21 08:16:57,670 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-01-21 08:16:57,670 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-01-21 08:16:57,670 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 4 states. [2018-01-21 08:16:57,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:16:57,708 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2018-01-21 08:16:57,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-01-21 08:16:57,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2018-01-21 08:16:57,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:16:57,709 INFO L225 Difference]: With dead ends: 52 [2018-01-21 08:16:57,709 INFO L226 Difference]: Without dead ends: 38 [2018-01-21 08:16:57,710 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 08:16:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-01-21 08:16:57,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2018-01-21 08:16:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-01-21 08:16:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-01-21 08:16:57,713 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 25 [2018-01-21 08:16:57,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:16:57,713 INFO L432 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-01-21 08:16:57,713 INFO L433 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-01-21 08:16:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-01-21 08:16:57,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 08:16:57,714 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:16:57,714 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 08:16:57,714 INFO L371 AbstractCegarLoop]: === Iteration 3 === [mainErr0EnsuresViolation]=== [2018-01-21 08:16:57,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1753910501, now seen corresponding path program 1 times [2018-01-21 08:16:57,714 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:16:57,715 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:57,715 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:57,715 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:16:57,715 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:16:57,720 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 08:16:57,720 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 08:16:57,720 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 08:16:57,726 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:16:57,726 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 08:16:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:16:57,756 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-01-21 08:16:57,757 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 08:16:57,758 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:16:57,758 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) [2018-01-21 08:17:00,543 INFO L262 AbstractInterpreter]: Error location(s) were unreachable [2018-01-21 08:17:00,544 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 08:17:00,545 INFO L395 sIntCurrentIteration]: Generating AbsInt predicates [2018-01-21 08:17:15,750 INFO L232 lantSequenceWeakener]: Weakened 29 states. On average, predicates are now at 64.25% of their original sizes. [2018-01-21 08:17:15,750 INFO L408 sIntCurrentIteration]: Unifying AI predicates [2018-01-21 08:17:16,151 INFO L419 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-01-21 08:17:16,152 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-01-21 08:17:16,152 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2018-01-21 08:17:16,152 INFO L252 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-01-21 08:17:16,152 INFO L409 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-01-21 08:17:16,152 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-01-21 08:17:16,152 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-01-21 08:17:16,153 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 17 states. [2018-01-21 08:17:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-01-21 08:17:26,502 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2018-01-21 08:17:26,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-01-21 08:17:26,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-01-21 08:17:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-01-21 08:17:26,503 INFO L225 Difference]: With dead ends: 63 [2018-01-21 08:17:26,503 INFO L226 Difference]: Without dead ends: 56 [2018-01-21 08:17:26,503 INFO L525 BasicCegarLoop]: 2 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2018-01-21 08:17:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-01-21 08:17:26,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2018-01-21 08:17:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-01-21 08:17:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2018-01-21 08:17:26,510 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 30 [2018-01-21 08:17:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-01-21 08:17:26,510 INFO L432 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2018-01-21 08:17:26,510 INFO L433 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-01-21 08:17:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2018-01-21 08:17:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-01-21 08:17:26,511 INFO L314 BasicCegarLoop]: Found error trace [2018-01-21 08:17:26,511 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 08:17:26,512 INFO L371 AbstractCegarLoop]: === Iteration 4 === [mainErr0EnsuresViolation]=== [2018-01-21 08:17:26,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1535055783, now seen corresponding path program 1 times [2018-01-21 08:17:26,512 INFO L67 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-01-21 08:17:26,513 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:26,513 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:26,513 INFO L117 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-01-21 08:17:26,513 INFO L280 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-01-21 08:17:26,518 ERROR L243 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-01-21 08:17:26,519 INFO L266 seRefinementStrategy]: Advancing trace checker [2018-01-21 08:17:26,519 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-01-21 08:17:26,526 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:26,526 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2018-01-21 08:17:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:17:26,566 INFO L199 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-01-21 08:17:26,566 INFO L201 CegarAbsIntRunner]: [0], [1], [7], [10], [14], [19], [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 08:17:26,567 INFO L147 AbstractInterpreter]: Using domain VPDomain [2018-01-21 08:17:26,568 INFO L101 FixpointEngine]: Starting fixpoint engine with domain VPDomain (maxUnwinding=3, maxParallelStates=2) Received shutdown request... [2018-01-21 08:17:28,591 WARN L571 FixpointEngine]: Received timeout, aborting fixpoint engine [2018-01-21 08:17:28,591 WARN L157 AbstractInterpreter]: Abstract interpretation run out of time [2018-01-21 08:17:28,592 INFO L434 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-01-21 08:17:28,592 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-01-21 08:17:28,592 INFO L187 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-01-21 08:17:28,597 INFO L101 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-01-21 08:17:28,597 INFO L280 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-01-21 08:17:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-01-21 08:17:28,610 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-01-21 08:17:28,613 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-01-21 08:17:28,613 WARN L491 AbstractCegarLoop]: Verification canceled [2018-01-21 08:17:28,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.01 08:17:28 BoogieIcfgContainer [2018-01-21 08:17:28,615 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-01-21 08:17:28,616 INFO L168 Benchmark]: Toolchain (without parser) took 57874.46 ms. Allocated memory was 304.1 MB in the beginning and 2.0 GB in the end (delta: 1.7 GB). Free memory was 262.4 MB in the beginning and 393.5 MB in the end (delta: -131.1 MB). Peak memory consumption was 1.5 GB. Max. memory is 5.3 GB. [2018-01-21 08:17:28,616 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 304.1 MB. Free memory is still 268.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-01-21 08:17:28,617 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.15 ms. Allocated memory is still 304.1 MB. Free memory was 261.4 MB in the beginning and 251.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. [2018-01-21 08:17:28,617 INFO L168 Benchmark]: Boogie Preprocessor took 38.44 ms. Allocated memory is still 304.1 MB. Free memory was 251.4 MB in the beginning and 249.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. [2018-01-21 08:17:28,617 INFO L168 Benchmark]: RCFGBuilder took 251.47 ms. Allocated memory is still 304.1 MB. Free memory was 249.4 MB in the beginning and 233.9 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 5.3 GB. [2018-01-21 08:17:28,617 INFO L168 Benchmark]: TraceAbstraction took 57349.90 ms. Allocated memory was 304.1 MB in the beginning and 2.0 GB in the end (delta: 1.7 GB). Free memory was 233.9 MB in the beginning and 393.5 MB in the end (delta: -159.6 MB). Peak memory consumption was 1.5 GB. Max. memory is 5.3 GB. [2018-01-21 08:17:28,619 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 304.1 MB. Free memory is still 268.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 227.15 ms. Allocated memory is still 304.1 MB. Free memory was 261.4 MB in the beginning and 251.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 38.44 ms. Allocated memory is still 304.1 MB. Free memory was 251.4 MB in the beginning and 249.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 5.3 GB. * RCFGBuilder took 251.47 ms. Allocated memory is still 304.1 MB. Free memory was 249.4 MB in the beginning and 233.9 MB in the end (delta: 15.5 MB). Peak memory consumption was 15.5 MB. Max. memory is 5.3 GB. * TraceAbstraction took 57349.90 ms. Allocated memory was 304.1 MB in the beginning and 2.0 GB in the end (delta: 1.7 GB). Free memory was 233.9 MB in the beginning and 393.5 MB in the end (delta: -159.6 MB). Peak memory consumption was 1.5 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) : 3.287073 RENAME_VARIABLES(MILLISECONDS) : 0.019552 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 3.051128 PROJECTAWAY(MILLISECONDS) : 85.309465 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.076326 DISJOIN(MILLISECONDS) : 2.588693 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.041314 ADD_EQUALITY(MILLISECONDS) : 0.021899 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.017454 #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) : 2.725188 RENAME_VARIABLES(MILLISECONDS) : 0.011621 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 2.551242 PROJECTAWAY(MILLISECONDS) : 85.918718 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.051105 DISJOIN(MILLISECONDS) : 1.531966 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.028174 ADD_EQUALITY(MILLISECONDS) : 0.013615 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.010524 #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) : 2.538857 RENAME_VARIABLES(MILLISECONDS) : 0.010954 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 2.404419 PROJECTAWAY(MILLISECONDS) : 96.700585 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.049114 DISJOIN(MILLISECONDS) : 1.545986 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.021305 ADD_EQUALITY(MILLISECONDS) : 0.015923 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.009936 #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) : 2.741379 RENAME_VARIABLES(MILLISECONDS) : 0.011252 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 2.572655 PROJECTAWAY(MILLISECONDS) : 96.801020 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.049841 DISJOIN(MILLISECONDS) : 1.536829 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 0.021850 ADD_EQUALITY(MILLISECONDS) : 0.012847 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.009427 #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) : 0.325777 RENAME_VARIABLES(MILLISECONDS) : 1.319932 UNFREEZE(MILLISECONDS) : 0.000000 CONJOIN(MILLISECONDS) : 0.298657 PROJECTAWAY(MILLISECONDS) : 51.592468 ADD_WEAK_EQUALITY(MILLISECONDS) : 0.082980 DISJOIN(MILLISECONDS) : 1.455283 RENAME_VARIABLES_DISJUNCTIVE(MILLISECONDS) : 1.344755 ADD_EQUALITY(MILLISECONDS) : 0.059759 DISJOIN_DISJUNCTIVE(MILLISECONDS) : 0.000000 ADD_DISEQUALITY(MILLISECONDS) : 0.046802 #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