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/Problem19_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 23:00:01,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 23:00:01,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 23:00:01,590 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 23:00:01,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 23:00:01,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 23:00:01,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 23:00:01,647 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 23:00:01,676 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 23:00:01,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 23:00:01,677 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 23:00:01,677 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 23:00:01,679 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 23:00:01,679 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 23:00:01,680 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 23:00:01,680 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 23:00:01,680 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 23:00:01,680 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 23:00:01,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 23:00:01,683 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 23:00:01,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 23:00:01,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 23:00:01,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 23:00:01,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 23:00:01,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 23:00:01,685 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 23:00:01,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 23:00:01,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 23:00:01,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 23:00:01,686 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 23:00:01,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 23:00:01,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 23:00:01,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 23:00:01,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 23:00:01,687 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 23:00:01,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 23:00:01,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 23:00:01,688 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 23:00:01,744 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 23:00:01,760 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 23:00:01,767 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 23:00:01,769 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 23:00:01,769 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 23:00:01,770 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label07.c [2019-09-09 23:00:01,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57132bc91/9c8edf61d0a849149ac7023f2837c1d0/FLAGff0fbba2c [2019-09-09 23:00:02,895 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 23:00:02,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem19_label07.c [2019-09-09 23:00:02,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57132bc91/9c8edf61d0a849149ac7023f2837c1d0/FLAGff0fbba2c [2019-09-09 23:00:03,249 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57132bc91/9c8edf61d0a849149ac7023f2837c1d0 [2019-09-09 23:00:03,260 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 23:00:03,261 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 23:00:03,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 23:00:03,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 23:00:03,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 23:00:03,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:00:03" (1/1) ... [2019-09-09 23:00:03,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd174ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:03, skipping insertion in model container [2019-09-09 23:00:03,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 11:00:03" (1/1) ... [2019-09-09 23:00:03,276 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 23:00:03,525 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 23:00:05,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:00:05,580 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 23:00:06,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 23:00:06,887 INFO L192 MainTranslator]: Completed translation [2019-09-09 23:00:06,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:06 WrapperNode [2019-09-09 23:00:06,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 23:00:06,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 23:00:06,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 23:00:06,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 23:00:06,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:06" (1/1) ... [2019-09-09 23:00:06,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:06" (1/1) ... [2019-09-09 23:00:07,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:06" (1/1) ... [2019-09-09 23:00:07,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:06" (1/1) ... [2019-09-09 23:00:07,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:06" (1/1) ... [2019-09-09 23:00:07,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:06" (1/1) ... [2019-09-09 23:00:07,327 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:06" (1/1) ... [2019-09-09 23:00:07,420 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 23:00:07,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 23:00:07,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 23:00:07,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 23:00:07,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:06" (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 23:00:07,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 23:00:07,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 23:00:07,505 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 23:00:07,505 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 23:00:07,506 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 23:00:07,506 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 23:00:07,506 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2019-09-09 23:00:07,506 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2019-09-09 23:00:07,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 23:00:07,507 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 23:00:07,507 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 23:00:07,508 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 23:00:07,508 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 23:00:07,509 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2019-09-09 23:00:07,509 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2019-09-09 23:00:07,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 23:00:07,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 23:00:07,510 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 23:00:07,510 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 23:00:07,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 23:00:07,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 23:00:18,586 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 23:00:18,587 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 23:00:18,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:00:18 BoogieIcfgContainer [2019-09-09 23:00:18,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 23:00:18,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 23:00:18,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 23:00:18,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 23:00:18,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 11:00:03" (1/3) ... [2019-09-09 23:00:18,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a125c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:00:18, skipping insertion in model container [2019-09-09 23:00:18,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 11:00:06" (2/3) ... [2019-09-09 23:00:18,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a125c63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 11:00:18, skipping insertion in model container [2019-09-09 23:00:18,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 11:00:18" (3/3) ... [2019-09-09 23:00:18,612 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label07.c [2019-09-09 23:00:18,628 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 23:00:18,640 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 23:00:18,666 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 23:00:18,706 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 23:00:18,707 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 23:00:18,707 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 23:00:18,707 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 23:00:18,707 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 23:00:18,708 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 23:00:18,708 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 23:00:18,708 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 23:00:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2019-09-09 23:00:18,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-09 23:00:18,791 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:00:18,792 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, 1, 1, 1] [2019-09-09 23:00:18,795 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:00:18,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:00:18,802 INFO L82 PathProgramCache]: Analyzing trace with hash -62108620, now seen corresponding path program 1 times [2019-09-09 23:00:18,805 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:00:18,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:00:18,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:00:18,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:00:18,863 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:00:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:00:19,269 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 23:00:19,272 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:00:19,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 23:00:19,273 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:00:19,279 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 23:00:19,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 23:00:19,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 23:00:19,298 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 4 states. [2019-09-09 23:00:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:00:36,521 INFO L93 Difference]: Finished difference Result 4690 states and 7030 transitions. [2019-09-09 23:00:36,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 23:00:36,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2019-09-09 23:00:36,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:00:36,572 INFO L225 Difference]: With dead ends: 4690 [2019-09-09 23:00:36,572 INFO L226 Difference]: Without dead ends: 4602 [2019-09-09 23:00:36,574 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 23:00:36,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2019-09-09 23:00:36,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 3138. [2019-09-09 23:00:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3138 states. [2019-09-09 23:00:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 4994 transitions. [2019-09-09 23:00:36,756 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 4994 transitions. Word has length 67 [2019-09-09 23:00:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:00:36,757 INFO L475 AbstractCegarLoop]: Abstraction has 3138 states and 4994 transitions. [2019-09-09 23:00:36,757 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 23:00:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 4994 transitions. [2019-09-09 23:00:36,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-09-09 23:00:36,762 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:00:36,763 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:00:36,763 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:00:36,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:00:36,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1687702184, now seen corresponding path program 1 times [2019-09-09 23:00:36,764 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:00:36,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:00:36,765 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:00:36,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:00:36,766 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:00:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:00:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:00:36,984 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:00:36,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:00:36,985 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:00:36,989 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:00:36,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:00:36,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:00:36,990 INFO L87 Difference]: Start difference. First operand 3138 states and 4994 transitions. Second operand 6 states. [2019-09-09 23:00:51,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:00:51,373 INFO L93 Difference]: Finished difference Result 6121 states and 9489 transitions. [2019-09-09 23:00:51,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:00:51,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2019-09-09 23:00:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:00:51,404 INFO L225 Difference]: With dead ends: 6121 [2019-09-09 23:00:51,404 INFO L226 Difference]: Without dead ends: 6121 [2019-09-09 23:00:51,405 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 23:00:51,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6121 states. [2019-09-09 23:00:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6121 to 6066. [2019-09-09 23:00:51,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6066 states. [2019-09-09 23:00:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6066 states to 6066 states and 9392 transitions. [2019-09-09 23:00:51,582 INFO L78 Accepts]: Start accepts. Automaton has 6066 states and 9392 transitions. Word has length 138 [2019-09-09 23:00:51,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:00:51,586 INFO L475 AbstractCegarLoop]: Abstraction has 6066 states and 9392 transitions. [2019-09-09 23:00:51,587 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:00:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 6066 states and 9392 transitions. [2019-09-09 23:00:51,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-09-09 23:00:51,597 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:00:51,598 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, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 23:00:51,598 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:00:51,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:00:51,601 INFO L82 PathProgramCache]: Analyzing trace with hash -607340246, now seen corresponding path program 1 times [2019-09-09 23:00:51,601 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:00:51,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:00:51,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:00:51,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:00:51,603 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:00:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:00:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:00:51,836 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:00:51,836 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:00:51,836 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:00:51,837 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:00:51,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:00:51,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:00:51,838 INFO L87 Difference]: Start difference. First operand 6066 states and 9392 transitions. Second operand 6 states. [2019-09-09 23:01:06,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:01:06,837 INFO L93 Difference]: Finished difference Result 12381 states and 18800 transitions. [2019-09-09 23:01:06,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-09 23:01:06,838 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 148 [2019-09-09 23:01:06,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:01:06,894 INFO L225 Difference]: With dead ends: 12381 [2019-09-09 23:01:06,895 INFO L226 Difference]: Without dead ends: 12381 [2019-09-09 23:01:06,895 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-09-09 23:01:06,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12381 states. [2019-09-09 23:01:07,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12381 to 12205. [2019-09-09 23:01:07,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12205 states. [2019-09-09 23:01:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12205 states to 12205 states and 18449 transitions. [2019-09-09 23:01:07,207 INFO L78 Accepts]: Start accepts. Automaton has 12205 states and 18449 transitions. Word has length 148 [2019-09-09 23:01:07,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:01:07,210 INFO L475 AbstractCegarLoop]: Abstraction has 12205 states and 18449 transitions. [2019-09-09 23:01:07,210 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:01:07,210 INFO L276 IsEmpty]: Start isEmpty. Operand 12205 states and 18449 transitions. [2019-09-09 23:01:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-09-09 23:01:07,217 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:01:07,218 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, 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] [2019-09-09 23:01:07,219 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:01:07,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:01:07,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1023595776, now seen corresponding path program 1 times [2019-09-09 23:01:07,219 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:01:07,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:01:07,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:01:07,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:01:07,221 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:01:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:01:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:01:07,421 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:01:07,422 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 23:01:07,422 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:01:07,422 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 23:01:07,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 23:01:07,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 23:01:07,423 INFO L87 Difference]: Start difference. First operand 12205 states and 18449 transitions. Second operand 5 states. [2019-09-09 23:01:23,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:01:23,838 INFO L93 Difference]: Finished difference Result 25087 states and 34089 transitions. [2019-09-09 23:01:23,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 23:01:23,838 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2019-09-09 23:01:23,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:01:23,944 INFO L225 Difference]: With dead ends: 25087 [2019-09-09 23:01:23,944 INFO L226 Difference]: Without dead ends: 25087 [2019-09-09 23:01:23,945 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 23:01:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25087 states. [2019-09-09 23:01:24,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25087 to 24484. [2019-09-09 23:01:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24484 states. [2019-09-09 23:01:24,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24484 states to 24484 states and 33068 transitions. [2019-09-09 23:01:24,606 INFO L78 Accepts]: Start accepts. Automaton has 24484 states and 33068 transitions. Word has length 168 [2019-09-09 23:01:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:01:24,607 INFO L475 AbstractCegarLoop]: Abstraction has 24484 states and 33068 transitions. [2019-09-09 23:01:24,608 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 23:01:24,608 INFO L276 IsEmpty]: Start isEmpty. Operand 24484 states and 33068 transitions. [2019-09-09 23:01:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-09-09 23:01:24,611 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:01:24,612 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, 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] [2019-09-09 23:01:24,612 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:01:24,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:01:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash 300224387, now seen corresponding path program 1 times [2019-09-09 23:01:24,613 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:01:24,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:01:24,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:01:24,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:01:24,614 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:01:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:01:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:01:24,878 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 23:01:24,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 23:01:24,878 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:01:24,879 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 23:01:24,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 23:01:24,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 23:01:24,880 INFO L87 Difference]: Start difference. First operand 24484 states and 33068 transitions. Second operand 6 states. [2019-09-09 23:01:38,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 23:01:38,827 INFO L93 Difference]: Finished difference Result 36838 states and 48980 transitions. [2019-09-09 23:01:38,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 23:01:38,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 231 [2019-09-09 23:01:38,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 23:01:38,984 INFO L225 Difference]: With dead ends: 36838 [2019-09-09 23:01:38,984 INFO L226 Difference]: Without dead ends: 36838 [2019-09-09 23:01:38,985 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 23:01:39,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36838 states. [2019-09-09 23:01:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36838 to 36526. [2019-09-09 23:01:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36526 states. [2019-09-09 23:01:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36526 states to 36526 states and 47833 transitions. [2019-09-09 23:01:39,857 INFO L78 Accepts]: Start accepts. Automaton has 36526 states and 47833 transitions. Word has length 231 [2019-09-09 23:01:39,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 23:01:39,858 INFO L475 AbstractCegarLoop]: Abstraction has 36526 states and 47833 transitions. [2019-09-09 23:01:39,858 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 23:01:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 36526 states and 47833 transitions. [2019-09-09 23:01:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2019-09-09 23:01:39,884 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 23:01:39,885 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, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:01:39,885 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 23:01:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:01:39,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1562458249, now seen corresponding path program 1 times [2019-09-09 23:01:39,887 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 23:01:39,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:01:39,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 23:01:39,889 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 23:01:39,889 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 23:01:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 23:01:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 23:01:41,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 23:01:41,069 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 23:01:41,070 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 775 with the following transitions: [2019-09-09 23:01:41,074 INFO L207 CegarAbsIntRunner]: [0], [1], [3088], [3092], [3096], [3100], [3104], [3108], [3112], [3116], [3127], [3131], [3135], [3146], [3150], [3154], [3158], [3169], [3173], [3184], [3188], [3192], [3196], [3200], [3204], [3208], [3212], [3216], [3220], [3224], [3228], [3232], [3236], [3240], [3251], [3255], [3259], [3263], [3267], [3271], [3275], [3279], [3283], [3287], [3291], [3302], [3306], [3310], [3314], [3318], [3322], [3326], [3330], [3334], [3338], [3342], [3346], [3350], [3361], [3365], [3376], [3380], [3384], [3395], [3399], [3403], [3407], [3418], [3422], [3426], [3430], [3434], [3438], [3442], [3446], [3457], [3461], [3465], [3469], [3473], [3484], [3488], [3492], [3496], [3500], [3504], [3508], [3512], [3516], [3520], [3524], [3528], [3532], [3536], [3540], [3544], [3548], [3552], [3556], [3567], [3571], [3575], [3579], [3583], [3587], [3591], [3595], [3599], [3603], [3607], [3610], [4195], [4196], [4200], [4204], [4208], [4212], [4216], [4220], [4224], [4228], [4232], [4236], [4240], [4244], [4248], [4252], [4256], [4260], [4264], [4268], [4279], [4290], [4294], [4298], [4309], [4313], [4317], [4321], [4325], [4329], [4333], [4337], [4341], [4345], [4349], [4353], [4357], [4361], [4365], [4369], [4373], [4377], [4381], [4385], [4396], [4400], [4404], [4408], [4412], [4416], [4420], [4431], [4435], [4439], [4443], [4454], [4458], [4462], [4466], [4470], [4474], [4478], [4482], [4486], [4490], [4494], [4498], [4502], [4506], [4510], [4514], [4518], [4522], [4526], [4530], [4534], [4538], [4542], [4553], [4557], [4561], [4565], [4569], [4573], [4577], [4581], [4585], [4589], [4593], [4597], [4601], [4605], [4609], [4620], [4624], [4628], [4632], [4636], [4647], [4651], [4655], [4659], [4663], [4667], [4671], [4675], [4679], [4690], [4694], [4698], [4709], [4713], [4717], [4721], [4725], [4729], [4733], [4737], [4741], [4745], [4749], [4753], [4764], [4768], [4772], [4776], [4780], [4784], [4788], [4792], [4803], [4807], [4811], [4815], [4819], [4823], [4827], [4831], [4835], [4839], [4843], [4847], [4858], [4862], [4873], [4877], [4881], [4885], [4896], [4900], [4904], [4908], [4912], [4916], [4920], [4924], [4935], [4939], [4943], [4954], [4958], [4962], [4966], [4970], [4974], [4978], [4982], [4986], [4990], [4994], [4998], [5002], [5006], [5010], [5014], [5018], [5022], [5026], [5030], [5034], [5038], [5042], [5046], [5050], [5054], [5058], [5062], [5066], [5070], [5074], [5078], [5082], [5086], [5090], [5094], [5105], [5109], [5120], [5124], [5128], [5132], [5136], [5140], [5144], [5148], [5152], [5156], [5167], [5171], [5175], [5179], [5183], [5187], [5191], [5195], [5199], [5203], [5207], [5211], [5215], [5219], [5223], [5225], [5226], [5227], [5234], [5242], [5250], [5258], [5266], [5274], [5282], [5290], [5298], [5306], [5314], [5322], [5330], [5338], [5346], [5354], [5362], [5370], [5378], [5386], [5394], [5402], [5410], [5418], [5426], [5434], [5442], [5450], [5458], [5466], [5474], [5482], [5490], [5498], [5506], [5514], [5522], [5530], [5538], [5546], [5554], [5562], [5570], [5578], [5586], [5594], [5602], [5610], [5618], [5626], [5634], [5642], [5650], [5658], [5666], [5670], [5672], [5675], [5683], [5691], [5699], [5707], [5715], [5727], [5731], [5742], [5746], [5750], [5754], [5758], [5762], [5766], [5770], [5774], [5778], [5781], [5782], [5786], [5797], [5808], [5819], [5823], [5827], [5838], [5842], [5846], [5850], [5854], [5858], [5862], [5866], [5870], [5874], [5878], [5882], [5886], [5890], [5894], [5898], [5902], [5906], [5910], [5914], [5918], [5922], [5926], [5930], [5934], [5938], [5942], [5946], [5950], [5954], [5958], [5962], [5966], [5977], [5981], [5985], [5996], [6000], [6004], [6008], [6012], [6016], [6020], [6024], [6028], [6032], [6036], [6040], [6051], [6055], [6059], [6063], [6067], [6071], [6075], [6079], [6083], [6087], [6091], [6102], [6106], [6110], [6121], [6125], [6129], [6140], [6144], [6148], [6152], [6156], [6160], [6164], [6168], [6172], [6176], [6180], [6184], [6188], [6192], [6196], [6200], [6204], [6208], [6212], [6216], [6220], [6224], [6228], [6232], [6236], [6240], [6251], [6255], [6259], [6263], [6267], [6278], [6282], [6286], [6290], [6294], [6298], [6302], [6306], [6310], [6314], [6325], [6329], [6333], [6344], [6348], [6352], [6356], [6360], [6371], [6375], [6379], [6383], [6387], [6391], [6402], [6413], [6417], [6421], [6425], [6429], [6440], [6444], [6455], [6459], [6463], [6467], [6471], [6475], [6486], [6490], [6494], [6498], [6502], [6506], [6510], [6514], [6525], [6529], [6533], [6537], [6541], [6545], [6549], [6553], [6557], [6561], [6565], [6569], [6573], [6577], [6581], [6585], [6589], [6593], [6604], [6608], [6619], [6623], [6634], [6645], [6649], [6653], [6657], [6661], [6665], [6669], [6673], [6677], [6681], [6685], [6689], [6693], [6697], [6701], [6712], [6716], [6727], [6731], [6735], [6739], [6743], [6747], [6751], [6755], [6759], [6763], [6767], [6771], [6775], [6779], [6783], [6787], [6791], [6795], [6799], [6801], [6802], [6806], [6815], [6819], [6821], [6832], [6833], [6834], [6835], [6836], [6837], [6838], [6840], [6841] [2019-09-09 23:01:41,168 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 23:01:41,170 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 23:03:14,000 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 23:03:14,003 INFO L272 AbstractInterpreter]: Visited 625 different actions 625 times. Never merged. Never widened. Performed 1199 root evaluator evaluations with a maximum evaluation depth of 15. Performed 1199 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 23:03:14,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 23:03:14,008 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 23:04:23,247 INFO L227 lantSequenceWeakener]: Weakened 749 states. On average, predicates are now at 75.3% of their original sizes. [2019-09-09 23:04:23,247 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 23:04:23,483 INFO L420 sIntCurrentIteration]: We unified 773 AI predicates to 773 [2019-09-09 23:04:23,484 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 23:04:23,485 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 23:04:23,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2019-09-09 23:04:23,485 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 23:04:23,486 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-09 23:04:23,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-09 23:04:23,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-09-09 23:04:23,487 INFO L87 Difference]: Start difference. First operand 36526 states and 47833 transitions. Second operand 17 states.