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/Problem16_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 20:03:05,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 20:03:05,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 20:03:05,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 20:03:05,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 20:03:05,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 20:03:05,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 20:03:05,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 20:03:05,673 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 20:03:05,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 20:03:05,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 20:03:05,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 20:03:05,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 20:03:05,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 20:03:05,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 20:03:05,677 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 [2019-09-09 20:03:05,692 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 20:03:05,692 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 20:03:05,692 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 20:03:05,693 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 20:03:05,693 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 20:03:05,694 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 20:03:05,694 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 20:03:05,694 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 20:03:05,694 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 20:03:05,694 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 20:03:05,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 20:03:05,695 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 20:03:05,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 20:03:05,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 20:03:05,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 20:03:05,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 20:03:05,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 20:03:05,697 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 20:03:05,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 20:03:05,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 20:03:05,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 20:03:05,697 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 20:03:05,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 20:03:05,698 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:03:05,698 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 20:03:05,698 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 20:03:05,699 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 20:03:05,699 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 20:03:05,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 20:03:05,699 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 20:03:05,726 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 20:03:05,738 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 20:03:05,742 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 20:03:05,743 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 20:03:05,743 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 20:03:05,746 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-09-09 20:03:05,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ed1b5b02/e554d1068f62465bb7da25b07f091b01/FLAGaced6f390 [2019-09-09 20:03:06,415 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 20:03:06,416 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label17.c [2019-09-09 20:03:06,437 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ed1b5b02/e554d1068f62465bb7da25b07f091b01/FLAGaced6f390 [2019-09-09 20:03:06,629 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ed1b5b02/e554d1068f62465bb7da25b07f091b01 [2019-09-09 20:03:06,639 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 20:03:06,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 20:03:06,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 20:03:06,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 20:03:06,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 20:03:06,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:03:06" (1/1) ... [2019-09-09 20:03:06,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d2ea10f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:06, skipping insertion in model container [2019-09-09 20:03:06,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:03:06" (1/1) ... [2019-09-09 20:03:06,657 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 20:03:06,740 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 20:03:07,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:03:07,518 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 20:03:07,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:03:07,779 INFO L192 MainTranslator]: Completed translation [2019-09-09 20:03:07,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:07 WrapperNode [2019-09-09 20:03:07,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 20:03:07,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 20:03:07,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 20:03:07,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 20:03:07,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:07" (1/1) ... [2019-09-09 20:03:07,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:07" (1/1) ... [2019-09-09 20:03:07,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:07" (1/1) ... [2019-09-09 20:03:07,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:07" (1/1) ... [2019-09-09 20:03:07,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:07" (1/1) ... [2019-09-09 20:03:07,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:07" (1/1) ... [2019-09-09 20:03:07,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:07" (1/1) ... [2019-09-09 20:03:07,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 20:03:07,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 20:03:07,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 20:03:07,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 20:03:07,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:07" (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 [2019-09-09 20:03:08,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 20:03:08,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 20:03:08,059 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 20:03:08,059 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 20:03:08,059 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 20:03:08,059 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 20:03:08,059 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 20:03:08,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 20:03:08,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 20:03:08,060 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 20:03:08,060 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 20:03:08,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 20:03:08,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 20:03:10,345 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 20:03:10,345 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 20:03:10,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:03:10 BoogieIcfgContainer [2019-09-09 20:03:10,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 20:03:10,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 20:03:10,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 20:03:10,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 20:03:10,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:03:06" (1/3) ... [2019-09-09 20:03:10,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4b893b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:03:10, skipping insertion in model container [2019-09-09 20:03:10,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:03:07" (2/3) ... [2019-09-09 20:03:10,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f4b893b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:03:10, skipping insertion in model container [2019-09-09 20:03:10,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:03:10" (3/3) ... [2019-09-09 20:03:10,365 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label17.c [2019-09-09 20:03:10,375 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 20:03:10,386 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 20:03:10,403 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 20:03:10,432 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 20:03:10,433 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 20:03:10,433 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 20:03:10,433 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 20:03:10,433 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 20:03:10,434 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 20:03:10,434 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 20:03:10,434 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 20:03:10,467 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-09-09 20:03:10,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-09 20:03:10,481 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:03:10,482 INFO L399 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] [2019-09-09 20:03:10,484 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:03:10,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:03:10,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1802126811, now seen corresponding path program 1 times [2019-09-09 20:03:10,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:03:10,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:03:10,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:03:10,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:03:10,544 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:03:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:03:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:03:10,847 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:03:10,848 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 20:03:10,848 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:03:10,853 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 20:03:10,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 20:03:10,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 20:03:10,871 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-09-09 20:03:13,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:03:13,463 INFO L93 Difference]: Finished difference Result 750 states and 1301 transitions. [2019-09-09 20:03:13,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 20:03:13,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-09-09 20:03:13,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:03:13,489 INFO L225 Difference]: With dead ends: 750 [2019-09-09 20:03:13,490 INFO L226 Difference]: Without dead ends: 682 [2019-09-09 20:03:13,491 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 20:03:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-09-09 20:03:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-09-09 20:03:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 20:03:13,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-09-09 20:03:13,593 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 64 [2019-09-09 20:03:13,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:03:13,594 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-09-09 20:03:13,594 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 20:03:13,594 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-09-09 20:03:13,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-09-09 20:03:13,601 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:03:13,601 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:03:13,601 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:03:13,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:03:13,602 INFO L82 PathProgramCache]: Analyzing trace with hash 2014427524, now seen corresponding path program 1 times [2019-09-09 20:03:13,602 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:03:13,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:03:13,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:03:13,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:03:13,604 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:03:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:03:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:03:13,845 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:03:13,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:03:13,846 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:03:13,847 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:03:13,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:03:13,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:03:13,848 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 6 states. [2019-09-09 20:03:16,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:03:16,637 INFO L93 Difference]: Finished difference Result 1387 states and 2310 transitions. [2019-09-09 20:03:16,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:03:16,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-09-09 20:03:16,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:03:16,650 INFO L225 Difference]: With dead ends: 1387 [2019-09-09 20:03:16,651 INFO L226 Difference]: Without dead ends: 1387 [2019-09-09 20:03:16,652 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 20:03:16,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2019-09-09 20:03:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1372. [2019-09-09 20:03:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-09-09 20:03:16,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2274 transitions. [2019-09-09 20:03:16,737 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2274 transitions. Word has length 134 [2019-09-09 20:03:16,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:03:16,739 INFO L475 AbstractCegarLoop]: Abstraction has 1372 states and 2274 transitions. [2019-09-09 20:03:16,739 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:03:16,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2274 transitions. [2019-09-09 20:03:16,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-09-09 20:03:16,749 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:03:16,750 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:03:16,750 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:03:16,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:03:16,750 INFO L82 PathProgramCache]: Analyzing trace with hash 2143421116, now seen corresponding path program 1 times [2019-09-09 20:03:16,750 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:03:16,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:03:16,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:03:16,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:03:16,752 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:03:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:03:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:03:16,915 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:03:16,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:03:16,915 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:03:16,916 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:03:16,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:03:16,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:03:16,917 INFO L87 Difference]: Start difference. First operand 1372 states and 2274 transitions. Second operand 6 states. [2019-09-09 20:03:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:03:19,831 INFO L93 Difference]: Finished difference Result 2100 states and 3398 transitions. [2019-09-09 20:03:19,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:03:19,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2019-09-09 20:03:19,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:03:19,849 INFO L225 Difference]: With dead ends: 2100 [2019-09-09 20:03:19,850 INFO L226 Difference]: Without dead ends: 2100 [2019-09-09 20:03:19,850 INFO L628 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 [2019-09-09 20:03:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-09-09 20:03:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2073. [2019-09-09 20:03:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2073 states. [2019-09-09 20:03:19,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3322 transitions. [2019-09-09 20:03:19,943 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3322 transitions. Word has length 138 [2019-09-09 20:03:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:03:19,944 INFO L475 AbstractCegarLoop]: Abstraction has 2073 states and 3322 transitions. [2019-09-09 20:03:19,944 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:03:19,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3322 transitions. [2019-09-09 20:03:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-09-09 20:03:19,947 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:03:19,947 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:03:19,948 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:03:19,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:03:19,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1919929679, now seen corresponding path program 1 times [2019-09-09 20:03:19,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:03:19,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:03:19,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:03:19,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:03:19,950 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:03:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:03:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:03:20,100 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:03:20,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:03:20,100 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:03:20,101 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:03:20,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:03:20,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:03:20,102 INFO L87 Difference]: Start difference. First operand 2073 states and 3322 transitions. Second operand 6 states. [2019-09-09 20:03:22,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:03:22,793 INFO L93 Difference]: Finished difference Result 3149 states and 4752 transitions. [2019-09-09 20:03:22,794 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:03:22,794 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 169 [2019-09-09 20:03:22,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:03:22,822 INFO L225 Difference]: With dead ends: 3149 [2019-09-09 20:03:22,823 INFO L226 Difference]: Without dead ends: 3149 [2019-09-09 20:03:22,824 INFO L628 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 [2019-09-09 20:03:22,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2019-09-09 20:03:22,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 3128. [2019-09-09 20:03:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3128 states. [2019-09-09 20:03:22,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 4658 transitions. [2019-09-09 20:03:22,947 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 4658 transitions. Word has length 169 [2019-09-09 20:03:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:03:22,949 INFO L475 AbstractCegarLoop]: Abstraction has 3128 states and 4658 transitions. [2019-09-09 20:03:22,949 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:03:22,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 4658 transitions. [2019-09-09 20:03:22,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-09-09 20:03:22,953 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:03:22,954 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:03:22,954 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:03:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:03:22,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1854023577, now seen corresponding path program 1 times [2019-09-09 20:03:22,955 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:03:22,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:03:22,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:03:22,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:03:22,956 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:03:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:03:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:03:23,217 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:03:23,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:03:23,217 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:03:23,218 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:03:23,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:03:23,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:03:23,219 INFO L87 Difference]: Start difference. First operand 3128 states and 4658 transitions. Second operand 6 states. [2019-09-09 20:03:27,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:03:27,836 INFO L93 Difference]: Finished difference Result 6967 states and 10599 transitions. [2019-09-09 20:03:27,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:03:27,836 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 213 [2019-09-09 20:03:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:03:27,881 INFO L225 Difference]: With dead ends: 6967 [2019-09-09 20:03:27,881 INFO L226 Difference]: Without dead ends: 6967 [2019-09-09 20:03:27,882 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-09 20:03:27,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6967 states. [2019-09-09 20:03:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6967 to 6961. [2019-09-09 20:03:28,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6961 states. [2019-09-09 20:03:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 10570 transitions. [2019-09-09 20:03:28,091 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 10570 transitions. Word has length 213 [2019-09-09 20:03:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:03:28,092 INFO L475 AbstractCegarLoop]: Abstraction has 6961 states and 10570 transitions. [2019-09-09 20:03:28,092 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:03:28,092 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 10570 transitions. [2019-09-09 20:03:28,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-09-09 20:03:28,113 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:03:28,114 INFO L399 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:03:28,114 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:03:28,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:03:28,115 INFO L82 PathProgramCache]: Analyzing trace with hash -37255589, now seen corresponding path program 1 times [2019-09-09 20:03:28,115 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:03:28,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:03:28,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:03:28,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:03:28,119 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:03:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:03:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 114 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 20:03:28,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 20:03:28,501 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 20:03:28,502 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 337 with the following transitions: [2019-09-09 20:03:28,504 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [395], [403], [411], [419], [427], [435], [443], [451], [459], [467], [475], [483], [491], [499], [507], [515], [523], [531], [539], [547], [555], [563], [571], [579], [587], [595], [599], [601], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [692], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [993], [997], [1001], [1005], [1009], [1013], [1017], [1021], [1025], [1029], [1033], [1037], [1041], [1045], [1049], [1053], [1057], [1061], [1065], [1069], [1073], [1077], [1081], [1085], [1089], [1093], [1097], [1101], [1105], [1109], [1113], [1117], [1121], [1125], [1129], [1133], [1137], [1141], [1145], [1149], [1153], [1157], [1161], [1165], [1169], [1173], [1177], [1181], [1185], [1188], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-09-09 20:03:28,561 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 20:03:28,564 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 20:03:42,048 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 20:03:42,050 INFO L272 AbstractInterpreter]: Visited 203 different actions 203 times. Never merged. Never widened. Performed 380 root evaluator evaluations with a maximum evaluation depth of 14. Performed 380 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 20:03:42,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:03:42,054 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 20:03:54,722 INFO L227 lantSequenceWeakener]: Weakened 130 states. On average, predicates are now at 79.11% of their original sizes. [2019-09-09 20:03:54,723 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 20:03:54,956 INFO L420 sIntCurrentIteration]: We unified 335 AI predicates to 335 [2019-09-09 20:03:54,956 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 20:03:54,957 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 20:03:54,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [16] imperfect sequences [6] total 20 [2019-09-09 20:03:54,958 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:03:54,958 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-09 20:03:54,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-09 20:03:54,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-09-09 20:03:54,959 INFO L87 Difference]: Start difference. First operand 6961 states and 10570 transitions. Second operand 16 states. [2019-09-09 20:04:08,966 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.