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/Problem18_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 22:20:18,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 22:20:18,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 22:20:18,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 22:20:18,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 22:20:18,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 22:20:18,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 22:20:18,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 22:20:18,848 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 22:20:18,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 22:20:18,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 22:20:18,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 22:20:18,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 22:20:18,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 22:20:18,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 22:20:18,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 22:20:18,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 22:20:18,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 22:20:18,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 22:20:18,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 22:20:18,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 22:20:18,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 22:20:18,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 22:20:18,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 22:20:18,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 22:20:18,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 22:20:18,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 22:20:18,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 22:20:18,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 22:20:18,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 22:20:18,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 22:20:18,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 22:20:18,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 22:20:18,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 22:20:18,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 22:20:18,872 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 22:20:18,873 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 22:20:18,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 22:20:18,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 22:20:18,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 22:20:18,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 22:20:18,875 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 22:20:18,891 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 22:20:18,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 22:20:18,892 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 22:20:18,892 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 22:20:18,893 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 22:20:18,893 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 22:20:18,893 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 22:20:18,893 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 22:20:18,894 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 22:20:18,894 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 22:20:18,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 22:20:18,895 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 22:20:18,895 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 22:20:18,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 22:20:18,895 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 22:20:18,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 22:20:18,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 22:20:18,896 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 22:20:18,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 22:20:18,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 22:20:18,896 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 22:20:18,897 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 22:20:18,897 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 22:20:18,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 22:20:18,897 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 22:20:18,897 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 22:20:18,898 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 22:20:18,898 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 22:20:18,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 22:20:18,898 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 22:20:18,927 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 22:20:18,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 22:20:18,943 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 22:20:18,944 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 22:20:18,945 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 22:20:18,946 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label29.c [2019-09-09 22:20:19,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4df720052/74832b065783485d84d96463e32428af/FLAG1e082438f [2019-09-09 22:20:19,794 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 22:20:19,794 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label29.c [2019-09-09 22:20:19,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4df720052/74832b065783485d84d96463e32428af/FLAG1e082438f [2019-09-09 22:20:19,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4df720052/74832b065783485d84d96463e32428af [2019-09-09 22:20:19,953 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 22:20:19,959 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 22:20:19,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 22:20:19,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 22:20:19,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 22:20:19,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:20:19" (1/1) ... [2019-09-09 22:20:19,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41e2ebb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:19, skipping insertion in model container [2019-09-09 22:20:19,970 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:20:19" (1/1) ... [2019-09-09 22:20:19,978 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 22:20:20,127 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 22:20:21,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:20:21,531 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 22:20:21,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:20:21,986 INFO L192 MainTranslator]: Completed translation [2019-09-09 22:20:21,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:21 WrapperNode [2019-09-09 22:20:21,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 22:20:21,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 22:20:21,987 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 22:20:21,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 22:20:22,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:21" (1/1) ... [2019-09-09 22:20:22,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:21" (1/1) ... [2019-09-09 22:20:22,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:21" (1/1) ... [2019-09-09 22:20:22,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:21" (1/1) ... [2019-09-09 22:20:22,291 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:21" (1/1) ... [2019-09-09 22:20:22,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:21" (1/1) ... [2019-09-09 22:20:22,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:21" (1/1) ... [2019-09-09 22:20:22,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 22:20:22,374 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 22:20:22,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 22:20:22,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 22:20:22,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:21" (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 22:20:22,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 22:20:22,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 22:20:22,458 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 22:20:22,459 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 22:20:22,459 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 22:20:22,459 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 22:20:22,459 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 22:20:22,460 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 22:20:22,461 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 22:20:22,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 22:20:22,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 22:20:22,463 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 22:20:22,463 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 22:20:22,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 22:20:22,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 22:20:26,270 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 22:20:26,271 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 22:20:26,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:20:26 BoogieIcfgContainer [2019-09-09 22:20:26,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 22:20:26,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 22:20:26,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 22:20:26,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 22:20:26,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 10:20:19" (1/3) ... [2019-09-09 22:20:26,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b036d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:20:26, skipping insertion in model container [2019-09-09 22:20:26,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:20:21" (2/3) ... [2019-09-09 22:20:26,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b036d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:20:26, skipping insertion in model container [2019-09-09 22:20:26,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:20:26" (3/3) ... [2019-09-09 22:20:26,284 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label29.c [2019-09-09 22:20:26,294 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 22:20:26,303 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 22:20:26,321 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 22:20:26,349 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 22:20:26,349 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 22:20:26,349 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 22:20:26,349 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 22:20:26,350 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 22:20:26,350 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 22:20:26,350 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 22:20:26,350 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 22:20:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-09-09 22:20:26,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-09 22:20:26,395 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:20:26,396 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] [2019-09-09 22:20:26,398 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:20:26,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:20:26,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1247826190, now seen corresponding path program 1 times [2019-09-09 22:20:26,406 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:20:26,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:26,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:20:26,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:26,458 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:20:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:20:26,660 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 22:20:26,663 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:20:26,663 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 22:20:26,663 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:20:26,669 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 22:20:26,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 22:20:26,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:20:26,687 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-09-09 22:20:31,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:20:31,324 INFO L93 Difference]: Finished difference Result 1480 states and 2667 transitions. [2019-09-09 22:20:31,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 22:20:31,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2019-09-09 22:20:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:20:31,364 INFO L225 Difference]: With dead ends: 1480 [2019-09-09 22:20:31,364 INFO L226 Difference]: Without dead ends: 1412 [2019-09-09 22:20:31,367 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:20:31,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-09-09 22:20:31,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-09-09 22:20:31,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-09-09 22:20:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-09-09 22:20:31,529 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 45 [2019-09-09 22:20:31,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:20:31,531 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-09-09 22:20:31,531 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 22:20:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-09-09 22:20:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-09 22:20:31,539 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:20:31,540 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:20:31,540 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:20:31,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:20:31,541 INFO L82 PathProgramCache]: Analyzing trace with hash 943060347, now seen corresponding path program 1 times [2019-09-09 22:20:31,541 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:20:31,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:31,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:20:31,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:31,544 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:20:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:20:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:20:31,812 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:20:31,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 22:20:31,813 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:20:31,815 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 22:20:31,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 22:20:31,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 22:20:31,816 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 5 states. [2019-09-09 22:20:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:20:37,440 INFO L93 Difference]: Finished difference Result 2166 states and 3658 transitions. [2019-09-09 22:20:37,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:20:37,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2019-09-09 22:20:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:20:37,459 INFO L225 Difference]: With dead ends: 2166 [2019-09-09 22:20:37,459 INFO L226 Difference]: Without dead ends: 2166 [2019-09-09 22:20:37,460 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 22:20:37,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2019-09-09 22:20:37,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2146. [2019-09-09 22:20:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2146 states. [2019-09-09 22:20:37,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3628 transitions. [2019-09-09 22:20:37,519 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3628 transitions. Word has length 116 [2019-09-09 22:20:37,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:20:37,520 INFO L475 AbstractCegarLoop]: Abstraction has 2146 states and 3628 transitions. [2019-09-09 22:20:37,520 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 22:20:37,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3628 transitions. [2019-09-09 22:20:37,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-09 22:20:37,523 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:20:37,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:20:37,524 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:20:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:20:37,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1308391962, now seen corresponding path program 1 times [2019-09-09 22:20:37,524 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:20:37,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:37,525 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:20:37,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:37,526 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:20:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:20:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:20:37,695 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:20:37,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:20:37,696 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:20:37,696 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:20:37,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:20:37,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:20:37,697 INFO L87 Difference]: Start difference. First operand 2146 states and 3628 transitions. Second operand 6 states. [2019-09-09 22:20:43,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:20:43,081 INFO L93 Difference]: Finished difference Result 2911 states and 4533 transitions. [2019-09-09 22:20:43,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:20:43,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 139 [2019-09-09 22:20:43,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:20:43,102 INFO L225 Difference]: With dead ends: 2911 [2019-09-09 22:20:43,103 INFO L226 Difference]: Without dead ends: 2911 [2019-09-09 22:20:43,104 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 22:20:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-09-09 22:20:43,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2887. [2019-09-09 22:20:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2887 states. [2019-09-09 22:20:43,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4487 transitions. [2019-09-09 22:20:43,194 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4487 transitions. Word has length 139 [2019-09-09 22:20:43,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:20:43,196 INFO L475 AbstractCegarLoop]: Abstraction has 2887 states and 4487 transitions. [2019-09-09 22:20:43,196 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:20:43,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4487 transitions. [2019-09-09 22:20:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-09-09 22:20:43,204 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:20:43,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:20:43,205 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:20:43,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:20:43,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1824000722, now seen corresponding path program 1 times [2019-09-09 22:20:43,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:20:43,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:43,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:20:43,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:43,207 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:20:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:20:43,417 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:20:43,417 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:20:43,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:20:43,418 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:20:43,419 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:20:43,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:20:43,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:20:43,420 INFO L87 Difference]: Start difference. First operand 2887 states and 4487 transitions. Second operand 6 states. [2019-09-09 22:20:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:20:48,462 INFO L93 Difference]: Finished difference Result 3662 states and 5163 transitions. [2019-09-09 22:20:48,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:20:48,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-09-09 22:20:48,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:20:48,482 INFO L225 Difference]: With dead ends: 3662 [2019-09-09 22:20:48,482 INFO L226 Difference]: Without dead ends: 3662 [2019-09-09 22:20:48,483 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 22:20:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2019-09-09 22:20:48,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3642. [2019-09-09 22:20:48,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3642 states. [2019-09-09 22:20:48,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 5124 transitions. [2019-09-09 22:20:48,570 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 5124 transitions. Word has length 143 [2019-09-09 22:20:48,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:20:48,572 INFO L475 AbstractCegarLoop]: Abstraction has 3642 states and 5124 transitions. [2019-09-09 22:20:48,572 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:20:48,572 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 5124 transitions. [2019-09-09 22:20:48,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-09-09 22:20:48,577 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:20:48,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:20:48,578 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:20:48,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:20:48,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1871023439, now seen corresponding path program 1 times [2019-09-09 22:20:48,578 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:20:48,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:48,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:20:48,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:48,580 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:20:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:20:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:20:48,772 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:20:48,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:20:48,772 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:20:48,773 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:20:48,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:20:48,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:20:48,774 INFO L87 Difference]: Start difference. First operand 3642 states and 5124 transitions. Second operand 6 states. [2019-09-09 22:20:54,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:20:54,183 INFO L93 Difference]: Finished difference Result 6768 states and 9269 transitions. [2019-09-09 22:20:54,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:20:54,183 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 174 [2019-09-09 22:20:54,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:20:54,215 INFO L225 Difference]: With dead ends: 6768 [2019-09-09 22:20:54,216 INFO L226 Difference]: Without dead ends: 6768 [2019-09-09 22:20:54,216 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 22:20:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2019-09-09 22:20:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6670. [2019-09-09 22:20:54,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6670 states. [2019-09-09 22:20:54,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 9031 transitions. [2019-09-09 22:20:54,359 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 9031 transitions. Word has length 174 [2019-09-09 22:20:54,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:20:54,360 INFO L475 AbstractCegarLoop]: Abstraction has 6670 states and 9031 transitions. [2019-09-09 22:20:54,360 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:20:54,360 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 9031 transitions. [2019-09-09 22:20:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-09-09 22:20:54,364 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:20:54,365 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 22:20:54,365 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:20:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:20:54,365 INFO L82 PathProgramCache]: Analyzing trace with hash 666932303, now seen corresponding path program 1 times [2019-09-09 22:20:54,366 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:20:54,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:54,367 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:20:54,367 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:20:54,367 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:20:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:20:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 22:20:54,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 22:20:54,624 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 22:20:54,626 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 207 with the following transitions: [2019-09-09 22:20:54,628 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1855], [1863], [1871], [1879], [1887], [1891], [1893], [1896], [1904], [1912], [1920], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2124], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2200], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-09-09 22:20:54,679 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 22:20:54,679 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 22:20:59,179 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 22:20:59,187 INFO L272 AbstractInterpreter]: Visited 95 different actions 95 times. Never merged. Never widened. Performed 229 root evaluator evaluations with a maximum evaluation depth of 13. Performed 229 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 22:20:59,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:20:59,192 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 22:21:02,642 INFO L227 lantSequenceWeakener]: Weakened 187 states. On average, predicates are now at 78.08% of their original sizes. [2019-09-09 22:21:02,642 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 22:21:02,716 INFO L420 sIntCurrentIteration]: We unified 205 AI predicates to 205 [2019-09-09 22:21:02,716 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 22:21:02,717 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 22:21:02,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 22:21:02,717 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:21:02,718 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 22:21:02,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 22:21:02,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 22:21:02,720 INFO L87 Difference]: Start difference. First operand 6670 states and 9031 transitions. Second operand 10 states. [2019-09-09 22:22:45,794 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.