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/Problem13_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:21:01,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:21:01,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:21:01,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 17:21:01,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 17:21:01,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 17:21:01,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 17:21:01,957 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 17:21:01,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 17:21:01,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 17:21:01,961 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 17:21:01,962 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 17:21:01,962 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 17:21:01,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 17:21:01,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 17:21:01,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 17:21:01,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 17:21:01,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 17:21:01,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 17:21:01,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 17:21:01,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 17:21:01,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 17:21:01,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 17:21:01,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 17:21:01,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 17:21:01,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 17:21:01,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 17:21:01,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 17:21:01,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 17:21:01,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 17:21:01,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 17:21:01,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 17:21:01,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 17:21:01,983 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 17:21:01,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 17:21:01,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 17:21:01,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 17:21:01,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 17:21:01,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:21:01,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:21:01,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:21:01,987 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 17:21:02,002 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:21:02,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:21:02,003 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:21:02,003 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:21:02,004 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:21:02,004 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:21:02,004 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:21:02,004 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:21:02,005 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:21:02,005 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:21:02,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:21:02,006 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:21:02,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:21:02,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:21:02,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:21:02,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:21:02,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:21:02,007 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:21:02,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:21:02,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:21:02,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:21:02,008 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:21:02,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:21:02,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:21:02,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:21:02,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:21:02,009 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:21:02,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:21:02,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:21:02,010 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:21:02,037 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:21:02,051 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:21:02,055 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:21:02,056 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:21:02,057 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:21:02,060 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label29.c [2019-09-09 17:21:02,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f24eee01/e0bdca34231c4b399da0bc660d4d0dba/FLAG5ba3149a5 [2019-09-09 17:21:02,956 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:21:02,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label29.c [2019-09-09 17:21:02,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f24eee01/e0bdca34231c4b399da0bc660d4d0dba/FLAG5ba3149a5 [2019-09-09 17:21:03,435 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f24eee01/e0bdca34231c4b399da0bc660d4d0dba [2019-09-09 17:21:03,444 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:21:03,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:21:03,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:21:03,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:21:03,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:21:03,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:21:03" (1/1) ... [2019-09-09 17:21:03,454 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17114e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:21:03, skipping insertion in model container [2019-09-09 17:21:03,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:21:03" (1/1) ... [2019-09-09 17:21:03,462 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:21:03,633 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:21:05,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:21:05,701 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:21:06,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:21:06,512 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:21:06,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:21:06 WrapperNode [2019-09-09 17:21:06,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:21:06,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:21:06,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:21:06,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:21:06,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:21:06" (1/1) ... [2019-09-09 17:21:06,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:21:06" (1/1) ... [2019-09-09 17:21:06,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:21:06" (1/1) ... [2019-09-09 17:21:06,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:21:06" (1/1) ... [2019-09-09 17:21:06,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:21:06" (1/1) ... [2019-09-09 17:21:06,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:21:06" (1/1) ... [2019-09-09 17:21:06,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:21:06" (1/1) ... [2019-09-09 17:21:06,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:21:06,830 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:21:06,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:21:06,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:21:06,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:21:06" (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 17:21:06,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:21:06,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:21:06,902 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:21:06,903 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:21:06,903 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:21:06,903 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:21:06,903 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:21:06,903 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:21:06,904 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:21:06,904 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:21:06,904 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:21:06,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:21:06,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:21:06,906 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:21:06,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:21:06,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:21:06,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:21:13,154 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:21:13,155 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:21:13,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:21:13 BoogieIcfgContainer [2019-09-09 17:21:13,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:21:13,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:21:13,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:21:13,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:21:13,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:21:03" (1/3) ... [2019-09-09 17:21:13,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c7c769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:21:13, skipping insertion in model container [2019-09-09 17:21:13,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:21:06" (2/3) ... [2019-09-09 17:21:13,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c7c769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:21:13, skipping insertion in model container [2019-09-09 17:21:13,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:21:13" (3/3) ... [2019-09-09 17:21:13,175 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label29.c [2019-09-09 17:21:13,188 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:21:13,198 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:21:13,215 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:21:13,248 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:21:13,249 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:21:13,249 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:21:13,249 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:21:13,249 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:21:13,249 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:21:13,250 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:21:13,250 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:21:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:21:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-09 17:21:13,309 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:21:13,310 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] [2019-09-09 17:21:13,312 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:21:13,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:21:13,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1603055809, now seen corresponding path program 1 times [2019-09-09 17:21:13,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:21:13,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:21:13,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:21:13,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:21:13,388 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:21:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:21:13,650 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 17:21:13,652 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:21:13,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:21:13,653 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:21:13,658 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:21:13,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:21:13,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:21:13,675 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2019-09-09 17:21:23,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:21:23,124 INFO L93 Difference]: Finished difference Result 2851 states and 4840 transitions. [2019-09-09 17:21:23,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:21:23,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-09-09 17:21:23,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:21:23,172 INFO L225 Difference]: With dead ends: 2851 [2019-09-09 17:21:23,172 INFO L226 Difference]: Without dead ends: 2758 [2019-09-09 17:21:23,175 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 17:21:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2019-09-09 17:21:23,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 1919. [2019-09-09 17:21:23,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1919 states. [2019-09-09 17:21:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 3313 transitions. [2019-09-09 17:21:23,355 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 3313 transitions. Word has length 20 [2019-09-09 17:21:23,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:21:23,355 INFO L475 AbstractCegarLoop]: Abstraction has 1919 states and 3313 transitions. [2019-09-09 17:21:23,355 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:21:23,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 3313 transitions. [2019-09-09 17:21:23,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-09 17:21:23,361 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:21:23,362 INFO L399 BasicCegarLoop]: trace histogram [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 17:21:23,362 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:21:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:21:23,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1116289529, now seen corresponding path program 1 times [2019-09-09 17:21:23,363 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:21:23,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:21:23,365 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:21:23,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:21:23,365 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:21:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:21:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:21:23,562 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:21:23,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:21:23,563 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:21:23,564 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:21:23,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:21:23,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:21:23,565 INFO L87 Difference]: Start difference. First operand 1919 states and 3313 transitions. Second operand 5 states. [2019-09-09 17:21:31,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:21:31,815 INFO L93 Difference]: Finished difference Result 3632 states and 5664 transitions. [2019-09-09 17:21:31,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:21:31,816 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2019-09-09 17:21:31,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:21:31,839 INFO L225 Difference]: With dead ends: 3632 [2019-09-09 17:21:31,840 INFO L226 Difference]: Without dead ends: 3632 [2019-09-09 17:21:31,841 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 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 17:21:31,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2019-09-09 17:21:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 3623. [2019-09-09 17:21:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3623 states. [2019-09-09 17:21:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 5644 transitions. [2019-09-09 17:21:31,944 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 5644 transitions. Word has length 89 [2019-09-09 17:21:31,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:21:31,945 INFO L475 AbstractCegarLoop]: Abstraction has 3623 states and 5644 transitions. [2019-09-09 17:21:31,945 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:21:31,945 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 5644 transitions. [2019-09-09 17:21:31,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-09 17:21:31,947 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:21:31,947 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 17:21:31,948 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:21:31,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:21:31,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1031098467, now seen corresponding path program 1 times [2019-09-09 17:21:31,948 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:21:31,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:21:31,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:21:31,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:21:31,950 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:21:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:21:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:21:32,096 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:21:32,097 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:21:32,097 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:21:32,097 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:21:32,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:21:32,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:21:32,099 INFO L87 Difference]: Start difference. First operand 3623 states and 5644 transitions. Second operand 5 states. [2019-09-09 17:21:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:21:41,123 INFO L93 Difference]: Finished difference Result 7191 states and 10294 transitions. [2019-09-09 17:21:41,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:21:41,127 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2019-09-09 17:21:41,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:21:41,164 INFO L225 Difference]: With dead ends: 7191 [2019-09-09 17:21:41,164 INFO L226 Difference]: Without dead ends: 7191 [2019-09-09 17:21:41,165 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 17:21:41,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7191 states. [2019-09-09 17:21:41,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7191 to 7086. [2019-09-09 17:21:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7086 states. [2019-09-09 17:21:41,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7086 states to 7086 states and 10105 transitions. [2019-09-09 17:21:41,366 INFO L78 Accepts]: Start accepts. Automaton has 7086 states and 10105 transitions. Word has length 91 [2019-09-09 17:21:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:21:41,369 INFO L475 AbstractCegarLoop]: Abstraction has 7086 states and 10105 transitions. [2019-09-09 17:21:41,369 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:21:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 7086 states and 10105 transitions. [2019-09-09 17:21:41,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-09-09 17:21:41,382 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:21:41,383 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 17:21:41,383 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:21:41,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:21:41,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1866418581, now seen corresponding path program 1 times [2019-09-09 17:21:41,384 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:21:41,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:21:41,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:21:41,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:21:41,385 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:21:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:21:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:21:41,520 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:21:41,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:21:41,520 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:21:41,523 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:21:41,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:21:41,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:21:41,523 INFO L87 Difference]: Start difference. First operand 7086 states and 10105 transitions. Second operand 3 states. [2019-09-09 17:21:46,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:21:46,553 INFO L93 Difference]: Finished difference Result 13737 states and 18740 transitions. [2019-09-09 17:21:46,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:21:46,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 135 [2019-09-09 17:21:46,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:21:46,618 INFO L225 Difference]: With dead ends: 13737 [2019-09-09 17:21:46,618 INFO L226 Difference]: Without dead ends: 13737 [2019-09-09 17:21:46,619 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 17:21:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13737 states. [2019-09-09 17:21:46,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13737 to 13728. [2019-09-09 17:21:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13728 states. [2019-09-09 17:21:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13728 states to 13728 states and 18716 transitions. [2019-09-09 17:21:47,028 INFO L78 Accepts]: Start accepts. Automaton has 13728 states and 18716 transitions. Word has length 135 [2019-09-09 17:21:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:21:47,031 INFO L475 AbstractCegarLoop]: Abstraction has 13728 states and 18716 transitions. [2019-09-09 17:21:47,031 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:21:47,032 INFO L276 IsEmpty]: Start isEmpty. Operand 13728 states and 18716 transitions. [2019-09-09 17:21:47,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-09-09 17:21:47,035 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:21:47,035 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 17:21:47,036 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:21:47,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:21:47,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1212306063, now seen corresponding path program 1 times [2019-09-09 17:21:47,037 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:21:47,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:21:47,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:21:47,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:21:47,039 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:21:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:21:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:21:47,191 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:21:47,191 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:21:47,191 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:21:47,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:21:47,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:21:47,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:21:47,193 INFO L87 Difference]: Start difference. First operand 13728 states and 18716 transitions. Second operand 4 states. [2019-09-09 17:21:55,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:21:55,891 INFO L93 Difference]: Finished difference Result 39202 states and 53133 transitions. [2019-09-09 17:21:55,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:21:55,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 140 [2019-09-09 17:21:55,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:21:56,035 INFO L225 Difference]: With dead ends: 39202 [2019-09-09 17:21:56,036 INFO L226 Difference]: Without dead ends: 38394 [2019-09-09 17:21:56,036 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 17:21:56,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38394 states. [2019-09-09 17:21:56,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38394 to 38358. [2019-09-09 17:21:56,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38358 states. [2019-09-09 17:21:56,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38358 states to 38358 states and 52231 transitions. [2019-09-09 17:21:56,879 INFO L78 Accepts]: Start accepts. Automaton has 38358 states and 52231 transitions. Word has length 140 [2019-09-09 17:21:56,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:21:56,880 INFO L475 AbstractCegarLoop]: Abstraction has 38358 states and 52231 transitions. [2019-09-09 17:21:56,880 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:21:56,880 INFO L276 IsEmpty]: Start isEmpty. Operand 38358 states and 52231 transitions. [2019-09-09 17:21:56,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-09-09 17:21:56,884 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:21:56,884 INFO L399 BasicCegarLoop]: trace histogram [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, 2, 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] [2019-09-09 17:21:56,884 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:21:56,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:21:56,885 INFO L82 PathProgramCache]: Analyzing trace with hash 957769466, now seen corresponding path program 1 times [2019-09-09 17:21:56,885 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:21:56,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:21:56,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:21:56,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:21:56,888 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:21:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:21:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 26 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 17:21:57,098 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:21:57,098 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:21:57,099 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 178 with the following transitions: [2019-09-09 17:21:57,102 INFO L207 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2695], [2697], [2700], [2708], [2716], [2724], [2732], [2740], [2748], [2756], [2764], [2772], [2780], [2788], [2796], [2804], [2812], [2820], [2828], [2836], [2844], [2852], [2860], [2868], [2876], [2884], [2892], [2900], [2908], [2916], [2924], [2932], [2940], [2948], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3128], [3129], [3133], [3137], [3148], [3152], [3156], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3202], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:21:57,158 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:21:57,160 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:22:21,352 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:22:21,354 INFO L272 AbstractInterpreter]: Visited 91 different actions 91 times. Never merged. Never widened. Performed 132 root evaluator evaluations with a maximum evaluation depth of 17. Performed 132 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:22:21,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:22:21,359 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:22:44,235 INFO L227 lantSequenceWeakener]: Weakened 168 states. On average, predicates are now at 70.65% of their original sizes. [2019-09-09 17:22:44,235 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:22:44,283 INFO L420 sIntCurrentIteration]: We unified 176 AI predicates to 176 [2019-09-09 17:22:44,284 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:22:44,285 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:22:44,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2019-09-09 17:22:44,285 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:22:44,286 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-09 17:22:44,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-09 17:22:44,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-09 17:22:44,286 INFO L87 Difference]: Start difference. First operand 38358 states and 52231 transitions. Second operand 7 states. [2019-09-09 17:25:25,095 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.