java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 18:59:37,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 18:59:37,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 18:59:37,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 18:59:37,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 18:59:37,635 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 18:59:37,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 18:59:37,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 18:59:37,642 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 18:59:37,643 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 18:59:37,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 18:59:37,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 18:59:37,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 18:59:37,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 18:59:37,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 18:59:37,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 18:59:37,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 18:59:37,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 18:59:37,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 18:59:37,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 18:59:37,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 18:59:37,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 18:59:37,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 18:59:37,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 18:59:37,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 18:59:37,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 18:59:37,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 18:59:37,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 18:59:37,680 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 18:59:37,706 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 18:59:37,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 18:59:37,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 18:59:37,708 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 18:59:37,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 18:59:37,709 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 18:59:37,709 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 18:59:37,709 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 18:59:37,711 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 18:59:37,711 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 18:59:37,713 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 18:59:37,714 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 18:59:37,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 18:59:37,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 18:59:37,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 18:59:37,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 18:59:37,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 18:59:37,715 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 18:59:37,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 18:59:37,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 18:59:37,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 18:59:37,716 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 18:59:37,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 18:59:37,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 18:59:37,717 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 18:59:37,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 18:59:37,718 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 18:59:37,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 18:59:37,718 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 18:59:37,718 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 18:59:37,773 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 18:59:37,786 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 18:59:37,790 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 18:59:37,791 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 18:59:37,792 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 18:59:37,793 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label34.c [2019-10-02 18:59:37,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8fdf845e/2ad3cd2d532e4f8780baee183b78fa21/FLAG8a2dae565 [2019-10-02 18:59:38,477 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 18:59:38,478 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label34.c [2019-10-02 18:59:38,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8fdf845e/2ad3cd2d532e4f8780baee183b78fa21/FLAG8a2dae565 [2019-10-02 18:59:38,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8fdf845e/2ad3cd2d532e4f8780baee183b78fa21 [2019-10-02 18:59:38,708 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 18:59:38,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 18:59:38,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 18:59:38,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 18:59:38,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 18:59:38,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:59:38" (1/1) ... [2019-10-02 18:59:38,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54268d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:59:38, skipping insertion in model container [2019-10-02 18:59:38,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:59:38" (1/1) ... [2019-10-02 18:59:38,727 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 18:59:38,784 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 18:59:39,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:59:39,287 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 18:59:39,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:59:39,408 INFO L192 MainTranslator]: Completed translation [2019-10-02 18:59:39,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:59:39 WrapperNode [2019-10-02 18:59:39,409 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 18:59:39,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 18:59:39,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 18:59:39,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 18:59:39,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:59:39" (1/1) ... [2019-10-02 18:59:39,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:59:39" (1/1) ... [2019-10-02 18:59:39,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:59:39" (1/1) ... [2019-10-02 18:59:39,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:59:39" (1/1) ... [2019-10-02 18:59:39,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:59:39" (1/1) ... [2019-10-02 18:59:39,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:59:39" (1/1) ... [2019-10-02 18:59:39,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:59:39" (1/1) ... [2019-10-02 18:59:39,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 18:59:39,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 18:59:39,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 18:59:39,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 18:59:39,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:59:39" (1/1) ... No working directory specified, using /storage/repos/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 [2019-10-02 18:59:39,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 18:59:39,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 18:59:39,591 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 18:59:39,591 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 18:59:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 18:59:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 18:59:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 18:59:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 18:59:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 18:59:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 18:59:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 18:59:40,899 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 18:59:40,899 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 18:59:40,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:59:40 BoogieIcfgContainer [2019-10-02 18:59:40,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 18:59:40,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 18:59:40,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 18:59:40,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 18:59:40,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 06:59:38" (1/3) ... [2019-10-02 18:59:40,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65455632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:59:40, skipping insertion in model container [2019-10-02 18:59:40,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:59:39" (2/3) ... [2019-10-02 18:59:40,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65455632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:59:40, skipping insertion in model container [2019-10-02 18:59:40,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:59:40" (3/3) ... [2019-10-02 18:59:40,910 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label34.c [2019-10-02 18:59:40,921 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 18:59:40,930 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 18:59:40,947 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 18:59:40,978 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 18:59:40,978 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 18:59:40,978 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 18:59:40,978 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 18:59:40,979 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 18:59:40,979 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 18:59:40,979 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 18:59:40,979 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 18:59:41,012 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 18:59:41,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-02 18:59:41,032 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:59:41,033 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:59:41,037 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:59:41,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:59:41,045 INFO L82 PathProgramCache]: Analyzing trace with hash -864026194, now seen corresponding path program 1 times [2019-10-02 18:59:41,048 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:59:41,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:59:41,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:59:41,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:59:41,113 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:59:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:59:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:59:41,540 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:59:41,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 18:59:41,541 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:59:41,547 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 18:59:41,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 18:59:41,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 18:59:41,563 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-10-02 18:59:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:59:43,107 INFO L93 Difference]: Finished difference Result 524 states and 782 transitions. [2019-10-02 18:59:43,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 18:59:43,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2019-10-02 18:59:43,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:59:43,129 INFO L225 Difference]: With dead ends: 524 [2019-10-02 18:59:43,130 INFO L226 Difference]: Without dead ends: 437 [2019-10-02 18:59:43,132 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 18:59:43,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-02 18:59:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2019-10-02 18:59:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-02 18:59:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 633 transitions. [2019-10-02 18:59:43,235 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 633 transitions. Word has length 69 [2019-10-02 18:59:43,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:59:43,235 INFO L475 AbstractCegarLoop]: Abstraction has 437 states and 633 transitions. [2019-10-02 18:59:43,236 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 18:59:43,236 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 633 transitions. [2019-10-02 18:59:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-02 18:59:43,243 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:59:43,244 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:59:43,244 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:59:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:59:43,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1649198670, now seen corresponding path program 1 times [2019-10-02 18:59:43,245 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:59:43,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:59:43,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:59:43,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:59:43,247 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:59:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:59:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:59:43,536 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:59:43,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 18:59:43,536 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:59:43,538 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 18:59:43,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 18:59:43,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 18:59:43,539 INFO L87 Difference]: Start difference. First operand 437 states and 633 transitions. Second operand 6 states. [2019-10-02 18:59:44,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:59:44,477 INFO L93 Difference]: Finished difference Result 898 states and 1343 transitions. [2019-10-02 18:59:44,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:59:44,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-10-02 18:59:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:59:44,490 INFO L225 Difference]: With dead ends: 898 [2019-10-02 18:59:44,490 INFO L226 Difference]: Without dead ends: 898 [2019-10-02 18:59:44,491 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 18:59:44,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2019-10-02 18:59:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 880. [2019-10-02 18:59:44,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-10-02 18:59:44,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1283 transitions. [2019-10-02 18:59:44,571 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1283 transitions. Word has length 143 [2019-10-02 18:59:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:59:44,572 INFO L475 AbstractCegarLoop]: Abstraction has 880 states and 1283 transitions. [2019-10-02 18:59:44,572 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 18:59:44,572 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1283 transitions. [2019-10-02 18:59:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-02 18:59:44,578 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:59:44,578 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:59:44,579 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:59:44,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:59:44,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1422420137, now seen corresponding path program 1 times [2019-10-02 18:59:44,580 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:59:44,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:59:44,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:59:44,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:59:44,582 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:59:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:59:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 18:59:44,789 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:59:44,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 18:59:44,789 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:59:44,790 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 18:59:44,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 18:59:44,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 18:59:44,791 INFO L87 Difference]: Start difference. First operand 880 states and 1283 transitions. Second operand 6 states. [2019-10-02 18:59:45,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:59:45,800 INFO L93 Difference]: Finished difference Result 1353 states and 2021 transitions. [2019-10-02 18:59:45,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:59:45,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2019-10-02 18:59:45,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:59:45,812 INFO L225 Difference]: With dead ends: 1353 [2019-10-02 18:59:45,813 INFO L226 Difference]: Without dead ends: 1353 [2019-10-02 18:59:45,813 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 18:59:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2019-10-02 18:59:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1323. [2019-10-02 18:59:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1323 states. [2019-10-02 18:59:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1900 transitions. [2019-10-02 18:59:45,864 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1900 transitions. Word has length 176 [2019-10-02 18:59:45,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:59:45,865 INFO L475 AbstractCegarLoop]: Abstraction has 1323 states and 1900 transitions. [2019-10-02 18:59:45,865 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 18:59:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1900 transitions. [2019-10-02 18:59:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2019-10-02 18:59:45,872 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:59:45,873 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:59:45,873 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:59:45,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:59:45,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2012360138, now seen corresponding path program 1 times [2019-10-02 18:59:45,874 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:59:45,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:59:45,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:59:45,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:59:45,876 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:59:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:59:46,251 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 118 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-02 18:59:46,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:59:46,252 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:59:46,254 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 264 with the following transitions: [2019-10-02 18:59:46,257 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [646], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:59:46,349 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:59:46,349 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:00:11,171 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:00:11,174 INFO L272 AbstractInterpreter]: Visited 112 different actions 112 times. Never merged. Never widened. Performed 149 root evaluator evaluations with a maximum evaluation depth of 16. Performed 149 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 19:00:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:00:11,178 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:00:41,671 INFO L227 lantSequenceWeakener]: Weakened 254 states. On average, predicates are now at 73.53% of their original sizes. [2019-10-02 19:00:41,671 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:00:41,708 INFO L420 sIntCurrentIteration]: We unified 262 AI predicates to 262 [2019-10-02 19:00:41,708 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:00:41,709 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:00:41,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2019-10-02 19:00:41,709 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:00:41,710 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 19:00:41,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 19:00:41,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-02 19:00:41,711 INFO L87 Difference]: Start difference. First operand 1323 states and 1900 transitions. Second operand 7 states. [2019-10-02 19:00:48,440 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:04:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:04:23,021 INFO L93 Difference]: Finished difference Result 1467 states and 2052 transitions. [2019-10-02 19:04:23,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:04:23,022 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 263 [2019-10-02 19:04:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:04:23,030 INFO L225 Difference]: With dead ends: 1467 [2019-10-02 19:04:23,030 INFO L226 Difference]: Without dead ends: 1467 [2019-10-02 19:04:23,031 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-02 19:04:23,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2019-10-02 19:04:23,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1466. [2019-10-02 19:04:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1466 states. [2019-10-02 19:04:23,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 2051 transitions. [2019-10-02 19:04:23,070 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 2051 transitions. Word has length 263 [2019-10-02 19:04:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:04:23,071 INFO L475 AbstractCegarLoop]: Abstraction has 1466 states and 2051 transitions. [2019-10-02 19:04:23,071 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 19:04:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 2051 transitions. [2019-10-02 19:04:23,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2019-10-02 19:04:23,079 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:04:23,079 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:04:23,080 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:04:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:04:23,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1638254450, now seen corresponding path program 1 times [2019-10-02 19:04:23,081 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:04:23,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:04:23,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:04:23,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:04:23,082 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:04:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:04:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 258 proven. 87 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-02 19:04:24,019 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:04:24,019 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:04:24,019 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 334 with the following transitions: [2019-10-02 19:04:24,020 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [646], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:04:24,028 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:04:24,028 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:04:26,760 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:05:34,944 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:05:34,946 INFO L272 AbstractInterpreter]: Visited 116 different actions 226 times. Merged at 4 different actions 4 times. Never widened. Performed 443 root evaluator evaluations with a maximum evaluation depth of 16. Performed 443 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:05:34,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:05:34,946 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:06:42,536 INFO L227 lantSequenceWeakener]: Weakened 330 states. On average, predicates are now at 73.4% of their original sizes. [2019-10-02 19:06:42,537 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:06:42,640 INFO L420 sIntCurrentIteration]: We unified 332 AI predicates to 332 [2019-10-02 19:06:42,641 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:06:42,641 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:06:42,641 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 23 [2019-10-02 19:06:42,641 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:06:42,642 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 19:06:42,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 19:06:42,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-02 19:06:42,643 INFO L87 Difference]: Start difference. First operand 1466 states and 2051 transitions. Second operand 11 states. [2019-10-02 19:12:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:12:06,504 INFO L93 Difference]: Finished difference Result 1613 states and 2211 transitions. [2019-10-02 19:12:06,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-02 19:12:06,505 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 333 [2019-10-02 19:12:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:12:06,513 INFO L225 Difference]: With dead ends: 1613 [2019-10-02 19:12:06,514 INFO L226 Difference]: Without dead ends: 1613 [2019-10-02 19:12:06,514 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-10-02 19:12:06,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2019-10-02 19:12:06,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1611. [2019-10-02 19:12:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1611 states. [2019-10-02 19:12:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 2209 transitions. [2019-10-02 19:12:06,556 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 2209 transitions. Word has length 333 [2019-10-02 19:12:06,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:12:06,557 INFO L475 AbstractCegarLoop]: Abstraction has 1611 states and 2209 transitions. [2019-10-02 19:12:06,557 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 19:12:06,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 2209 transitions. [2019-10-02 19:12:06,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2019-10-02 19:12:06,565 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:12:06,566 INFO L411 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:12:06,566 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:12:06,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:12:06,567 INFO L82 PathProgramCache]: Analyzing trace with hash -343850119, now seen corresponding path program 1 times [2019-10-02 19:12:06,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:12:06,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:12:06,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:12:06,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:12:06,569 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:12:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:12:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 191 proven. 163 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-02 19:12:06,825 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:12:06,825 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:12:06,825 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 343 with the following transitions: [2019-10-02 19:12:06,826 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [461], [463], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [566], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [619], [623], [627], [631], [635], [639], [643], [646], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 19:12:06,831 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:12:06,831 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:12:17,836 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:12:55,086 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:12:55,086 INFO L272 AbstractInterpreter]: Visited 116 different actions 225 times. Merged at 3 different actions 3 times. Never widened. Performed 359 root evaluator evaluations with a maximum evaluation depth of 16. Performed 359 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-02 19:12:55,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:12:55,087 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:13:38,167 INFO L227 lantSequenceWeakener]: Weakened 339 states. On average, predicates are now at 73.38% of their original sizes. [2019-10-02 19:13:38,168 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:13:38,245 INFO L420 sIntCurrentIteration]: We unified 341 AI predicates to 341 [2019-10-02 19:13:38,245 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:13:38,245 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:13:38,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-10-02 19:13:38,245 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:13:38,246 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 19:13:38,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 19:13:38,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 19:13:38,247 INFO L87 Difference]: Start difference. First operand 1611 states and 2209 transitions. Second operand 11 states.