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_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 18:43:58,538 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 18:43:58,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 18:43:58,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 18:43:58,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 18:43:58,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 18:43:58,563 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 18:43:58,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 18:43:58,564 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 18:43:58,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 18:43:58,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 18:43:58,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 18:43:58,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 18:43:58,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 18:43:58,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 18:43:58,574 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 18:43:58,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 18:43:58,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 18:43:58,580 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 18:43:58,581 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 18:43:58,582 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 18:43:58,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 18:43:58,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 18:43:58,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 18:43:58,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 18:43:58,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 18:43:58,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 18:43:58,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 18:43:58,587 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 18:43:58,602 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 18:43:58,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 18:43:58,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 18:43:58,603 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 18:43:58,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 18:43:58,603 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 18:43:58,604 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 18:43:58,604 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 18:43:58,604 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 18:43:58,604 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 18:43:58,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 18:43:58,605 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 18:43:58,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 18:43:58,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 18:43:58,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 18:43:58,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 18:43:58,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 18:43:58,606 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 18:43:58,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 18:43:58,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 18:43:58,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 18:43:58,607 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 18:43:58,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 18:43:58,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 18:43:58,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 18:43:58,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 18:43:58,608 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 18:43:58,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 18:43:58,608 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 18:43:58,609 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 18:43:58,637 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 18:43:58,649 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 18:43:58,652 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 18:43:58,654 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 18:43:58,654 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 18:43:58,654 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label15.c [2019-10-02 18:43:58,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d85daac2/347c1f9af0274b48a3d77a5ae6f2a04a/FLAG49c3607ee [2019-10-02 18:43:59,270 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 18:43:59,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label15.c [2019-10-02 18:43:59,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d85daac2/347c1f9af0274b48a3d77a5ae6f2a04a/FLAG49c3607ee [2019-10-02 18:43:59,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d85daac2/347c1f9af0274b48a3d77a5ae6f2a04a [2019-10-02 18:43:59,546 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 18:43:59,547 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 18:43:59,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 18:43:59,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 18:43:59,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 18:43:59,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:43:59" (1/1) ... [2019-10-02 18:43:59,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4de72e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:43:59, skipping insertion in model container [2019-10-02 18:43:59,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 06:43:59" (1/1) ... [2019-10-02 18:43:59,564 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 18:43:59,618 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 18:44:00,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:44:00,121 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 18:44:00,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 18:44:00,247 INFO L192 MainTranslator]: Completed translation [2019-10-02 18:44:00,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:44:00 WrapperNode [2019-10-02 18:44:00,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 18:44:00,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 18:44:00,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 18:44:00,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 18:44:00,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:44:00" (1/1) ... [2019-10-02 18:44:00,260 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:44:00" (1/1) ... [2019-10-02 18:44:00,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:44:00" (1/1) ... [2019-10-02 18:44:00,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:44:00" (1/1) ... [2019-10-02 18:44:00,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:44:00" (1/1) ... [2019-10-02 18:44:00,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:44:00" (1/1) ... [2019-10-02 18:44:00,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:44:00" (1/1) ... [2019-10-02 18:44:00,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 18:44:00,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 18:44:00,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 18:44:00,358 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 18:44:00,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:44:00" (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 18:44:00,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 18:44:00,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 18:44:00,430 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 18:44:00,430 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 18:44:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 18:44:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 18:44:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 18:44:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 18:44:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 18:44:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 18:44:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 18:44:01,650 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 18:44:01,650 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 18:44:01,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:44:01 BoogieIcfgContainer [2019-10-02 18:44:01,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 18:44:01,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 18:44:01,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 18:44:01,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 18:44:01,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 06:43:59" (1/3) ... [2019-10-02 18:44:01,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207dde29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:44:01, skipping insertion in model container [2019-10-02 18:44:01,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 06:44:00" (2/3) ... [2019-10-02 18:44:01,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@207dde29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 06:44:01, skipping insertion in model container [2019-10-02 18:44:01,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 06:44:01" (3/3) ... [2019-10-02 18:44:01,661 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label15.c [2019-10-02 18:44:01,673 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 18:44:01,685 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 18:44:01,706 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 18:44:01,746 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 18:44:01,747 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 18:44:01,748 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 18:44:01,748 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 18:44:01,748 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 18:44:01,748 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 18:44:01,748 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 18:44:01,749 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 18:44:01,779 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-02 18:44:01,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-02 18:44:01,789 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:44:01,790 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 18:44:01,793 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:44:01,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:44:01,799 INFO L82 PathProgramCache]: Analyzing trace with hash -553937361, now seen corresponding path program 1 times [2019-10-02 18:44:01,802 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:44:01,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:44:01,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:44:01,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:44:01,860 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:44:01,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:44:02,052 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 18:44:02,055 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 18:44:02,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 18:44:02,056 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:44:02,061 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 18:44:02,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 18:44:02,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 18:44:02,082 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-02 18:44:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:44:03,104 INFO L93 Difference]: Finished difference Result 362 states and 553 transitions. [2019-10-02 18:44:03,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 18:44:03,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-02 18:44:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:44:03,131 INFO L225 Difference]: With dead ends: 362 [2019-10-02 18:44:03,132 INFO L226 Difference]: Without dead ends: 294 [2019-10-02 18:44:03,135 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 18:44:03,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-02 18:44:03,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-02 18:44:03,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-02 18:44:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 436 transitions. [2019-10-02 18:44:03,215 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 436 transitions. Word has length 16 [2019-10-02 18:44:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:44:03,216 INFO L475 AbstractCegarLoop]: Abstraction has 294 states and 436 transitions. [2019-10-02 18:44:03,216 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 18:44:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 436 transitions. [2019-10-02 18:44:03,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-02 18:44:03,221 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:44:03,222 INFO L411 BasicCegarLoop]: trace histogram [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, 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 18:44:03,222 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:44:03,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:44:03,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1138476029, now seen corresponding path program 1 times [2019-10-02 18:44:03,223 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:44:03,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:44:03,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:44:03,224 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:44:03,225 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:44:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:44:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-02 18:44:03,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:44:03,525 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:44:03,526 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 104 with the following transitions: [2019-10-02 18:44:03,528 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [37], [39], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:44:03,576 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:44:03,576 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:44:19,906 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:44:19,909 INFO L272 AbstractInterpreter]: Visited 91 different actions 91 times. Never merged. Never widened. Performed 128 root evaluator evaluations with a maximum evaluation depth of 16. Performed 128 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 18:44:19,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:44:19,914 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:44:31,603 INFO L227 lantSequenceWeakener]: Weakened 97 states. On average, predicates are now at 72.33% of their original sizes. [2019-10-02 18:44:31,604 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:44:31,655 INFO L420 sIntCurrentIteration]: We unified 102 AI predicates to 102 [2019-10-02 18:44:31,655 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:44:31,656 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:44:31,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 9 [2019-10-02 18:44:31,656 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:44:31,658 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-02 18:44:31,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-02 18:44:31,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-02 18:44:31,659 INFO L87 Difference]: Start difference. First operand 294 states and 436 transitions. Second operand 7 states. [2019-10-02 18:44:36,330 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:47:28,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:47:28,500 INFO L93 Difference]: Finished difference Result 438 states and 586 transitions. [2019-10-02 18:47:28,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 18:47:28,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 103 [2019-10-02 18:47:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:47:28,508 INFO L225 Difference]: With dead ends: 438 [2019-10-02 18:47:28,508 INFO L226 Difference]: Without dead ends: 438 [2019-10-02 18:47:28,509 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 97 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 18:47:28,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2019-10-02 18:47:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 437. [2019-10-02 18:47:28,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-10-02 18:47:28,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 585 transitions. [2019-10-02 18:47:28,558 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 585 transitions. Word has length 103 [2019-10-02 18:47:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:47:28,559 INFO L475 AbstractCegarLoop]: Abstraction has 437 states and 585 transitions. [2019-10-02 18:47:28,559 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-02 18:47:28,559 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 585 transitions. [2019-10-02 18:47:28,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-02 18:47:28,567 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:47:28,567 INFO L411 BasicCegarLoop]: trace histogram [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, 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] [2019-10-02 18:47:28,567 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:47:28,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:47:28,568 INFO L82 PathProgramCache]: Analyzing trace with hash 47410362, now seen corresponding path program 1 times [2019-10-02 18:47:28,568 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:47:28,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:47:28,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:47:28,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:47:28,570 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:47:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:47:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-10-02 18:47:28,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:47:28,769 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:47:28,769 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 174 with the following transitions: [2019-10-02 18:47:28,770 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [37], [39], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [498], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:47:28,777 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:47:28,784 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:47:31,484 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:48:12,390 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:48:12,391 INFO L272 AbstractInterpreter]: Visited 95 different actions 184 times. Merged at 4 different actions 4 times. Never widened. Performed 380 root evaluator evaluations with a maximum evaluation depth of 16. Performed 380 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 18:48:12,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:48:12,391 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:48:39,625 INFO L227 lantSequenceWeakener]: Weakened 170 states. On average, predicates are now at 72.57% of their original sizes. [2019-10-02 18:48:39,625 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:48:39,696 INFO L420 sIntCurrentIteration]: We unified 172 AI predicates to 172 [2019-10-02 18:48:39,696 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:48:39,697 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:48:39,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2019-10-02 18:48:39,697 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:48:39,698 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 18:48:39,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 18:48:39,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-02 18:48:39,698 INFO L87 Difference]: Start difference. First operand 437 states and 585 transitions. Second operand 10 states. [2019-10-02 18:53:06,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:53:06,388 INFO L93 Difference]: Finished difference Result 584 states and 744 transitions. [2019-10-02 18:53:06,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 18:53:06,388 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 173 [2019-10-02 18:53:06,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:53:06,393 INFO L225 Difference]: With dead ends: 584 [2019-10-02 18:53:06,393 INFO L226 Difference]: Without dead ends: 584 [2019-10-02 18:53:06,394 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2019-10-02 18:53:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-02 18:53:06,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2019-10-02 18:53:06,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2019-10-02 18:53:06,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 742 transitions. [2019-10-02 18:53:06,417 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 742 transitions. Word has length 173 [2019-10-02 18:53:06,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:53:06,418 INFO L475 AbstractCegarLoop]: Abstraction has 582 states and 742 transitions. [2019-10-02 18:53:06,418 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-02 18:53:06,418 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 742 transitions. [2019-10-02 18:53:06,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-02 18:53:06,422 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:53:06,422 INFO L411 BasicCegarLoop]: trace histogram [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, 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] [2019-10-02 18:53:06,422 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:53:06,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:53:06,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1261276895, now seen corresponding path program 1 times [2019-10-02 18:53:06,423 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:53:06,424 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:53:06,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:53:06,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:53:06,425 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:53:06,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:53:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-02 18:53:06,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:53:06,666 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:53:06,666 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 183 with the following transitions: [2019-10-02 18:53:06,668 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [37], [39], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [534], [535], [539], [543], [547], [551], [555], [559], [563], [566], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:53:06,685 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:53:06,685 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:53:17,916 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 18:53:38,047 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 18:53:38,048 INFO L272 AbstractInterpreter]: Visited 95 different actions 183 times. Merged at 3 different actions 3 times. Never widened. Performed 318 root evaluator evaluations with a maximum evaluation depth of 16. Performed 318 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 18:53:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:53:38,048 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 18:53:59,690 INFO L227 lantSequenceWeakener]: Weakened 179 states. On average, predicates are now at 72.58% of their original sizes. [2019-10-02 18:53:59,690 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 18:53:59,769 INFO L420 sIntCurrentIteration]: We unified 181 AI predicates to 181 [2019-10-02 18:53:59,770 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 18:53:59,770 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 18:53:59,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [8] total 17 [2019-10-02 18:53:59,770 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 18:53:59,771 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 18:53:59,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 18:53:59,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-02 18:53:59,772 INFO L87 Difference]: Start difference. First operand 582 states and 742 transitions. Second operand 11 states. [2019-10-02 18:57:10,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 18:57:10,733 INFO L93 Difference]: Finished difference Result 749 states and 919 transitions. [2019-10-02 18:57:10,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-02 18:57:10,733 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 182 [2019-10-02 18:57:10,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 18:57:10,738 INFO L225 Difference]: With dead ends: 749 [2019-10-02 18:57:10,738 INFO L226 Difference]: Without dead ends: 749 [2019-10-02 18:57:10,739 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2019-10-02 18:57:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2019-10-02 18:57:10,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 727. [2019-10-02 18:57:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 727 states. [2019-10-02 18:57:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 894 transitions. [2019-10-02 18:57:10,760 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 894 transitions. Word has length 182 [2019-10-02 18:57:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 18:57:10,760 INFO L475 AbstractCegarLoop]: Abstraction has 727 states and 894 transitions. [2019-10-02 18:57:10,760 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-02 18:57:10,761 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 894 transitions. [2019-10-02 18:57:10,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-02 18:57:10,765 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 18:57:10,765 INFO L411 BasicCegarLoop]: trace histogram [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, 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] [2019-10-02 18:57:10,766 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 18:57:10,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 18:57:10,766 INFO L82 PathProgramCache]: Analyzing trace with hash -551123737, now seen corresponding path program 1 times [2019-10-02 18:57:10,766 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 18:57:10,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:57:10,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 18:57:10,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 18:57:10,768 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 18:57:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 18:57:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-02 18:57:10,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 18:57:10,958 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 18:57:10,958 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 219 with the following transitions: [2019-10-02 18:57:10,959 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [37], [39], [42], [50], [58], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [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], [647], [651], [655], [659], [663], [667], [671], [675], [678], [792], [796], [805], [809], [811], [816], [817], [818], [820], [821] [2019-10-02 18:57:10,965 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 18:57:10,965 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 18:57:44,732 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.