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/Problem15_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:13:11,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:13:11,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:13:11,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 19:13:11,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 19:13:11,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 19:13:11,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 19:13:11,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 19:13:11,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 19:13:11,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 19:13:11,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 19:13:11,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 19:13:11,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 19:13:11,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 19:13:11,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 19:13:11,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 19:13:11,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 19:13:11,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 19:13:11,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 19:13:11,876 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 19:13:11,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 19:13:11,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 19:13:11,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 19:13:11,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 19:13:11,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 19:13:11,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 19:13:11,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 19:13:11,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 19:13:11,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 19:13:11,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 19:13:11,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 19:13:11,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 19:13:11,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 19:13:11,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 19:13:11,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 19:13:11,890 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 19:13:11,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 19:13:11,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 19:13:11,891 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 19:13:11,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 19:13:11,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 19:13:11,893 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 19:13:11,914 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:13:11,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:13:11,914 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:13:11,915 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:13:11,915 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:13:11,916 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:13:11,916 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:13:11,916 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:13:11,916 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:13:11,916 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:13:11,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:13:11,918 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:13:11,918 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:13:11,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:13:11,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:13:11,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:13:11,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:13:11,919 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:13:11,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:13:11,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:13:11,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:13:11,920 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:13:11,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:13:11,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:13:11,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:13:11,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:13:11,921 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:13:11,921 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:13:11,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:13:11,922 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:13:11,970 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:13:11,986 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:13:11,990 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:13:11,992 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:13:11,992 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:13:11,994 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label29.c [2019-09-09 19:13:12,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a8da3f7f/dddda5af118a4f6897f5770e134b9912/FLAG496d95616 [2019-09-09 19:13:12,745 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:13:12,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label29.c [2019-09-09 19:13:12,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a8da3f7f/dddda5af118a4f6897f5770e134b9912/FLAG496d95616 [2019-09-09 19:13:12,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a8da3f7f/dddda5af118a4f6897f5770e134b9912 [2019-09-09 19:13:12,897 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:13:12,898 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:13:12,902 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:13:12,902 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:13:12,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:13:12,907 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:13:12" (1/1) ... [2019-09-09 19:13:12,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f3c7da1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:13:12, skipping insertion in model container [2019-09-09 19:13:12,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:13:12" (1/1) ... [2019-09-09 19:13:12,918 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:13:13,014 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:13:14,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:13:14,036 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:13:14,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:13:14,372 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:13:14,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:13:14 WrapperNode [2019-09-09 19:13:14,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:13:14,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:13:14,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:13:14,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:13:14,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:13:14" (1/1) ... [2019-09-09 19:13:14,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:13:14" (1/1) ... [2019-09-09 19:13:14,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:13:14" (1/1) ... [2019-09-09 19:13:14,439 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:13:14" (1/1) ... [2019-09-09 19:13:14,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:13:14" (1/1) ... [2019-09-09 19:13:14,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:13:14" (1/1) ... [2019-09-09 19:13:14,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:13:14" (1/1) ... [2019-09-09 19:13:14,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:13:14,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:13:14,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:13:14,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:13:14,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:13:14" (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 19:13:14,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:13:14,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:13:14,671 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:13:14,671 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:13:14,672 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:13:14,672 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:13:14,672 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:13:14,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:13:14,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:13:14,673 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:13:14,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:13:14,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:13:14,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:13:18,299 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:13:18,299 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:13:18,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:13:18 BoogieIcfgContainer [2019-09-09 19:13:18,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:13:18,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:13:18,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:13:18,307 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:13:18,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:13:12" (1/3) ... [2019-09-09 19:13:18,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@970771e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:13:18, skipping insertion in model container [2019-09-09 19:13:18,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:13:14" (2/3) ... [2019-09-09 19:13:18,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@970771e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:13:18, skipping insertion in model container [2019-09-09 19:13:18,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:13:18" (3/3) ... [2019-09-09 19:13:18,311 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label29.c [2019-09-09 19:13:18,324 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:13:18,335 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:13:18,352 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:13:18,379 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:13:18,380 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:13:18,380 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:13:18,380 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:13:18,380 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:13:18,380 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:13:18,381 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:13:18,381 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:13:18,409 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-09-09 19:13:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-09 19:13:18,420 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:13:18,421 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] [2019-09-09 19:13:18,423 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:13:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:13:18,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1084941995, now seen corresponding path program 1 times [2019-09-09 19:13:18,432 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:13:18,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:18,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:13:18,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:18,485 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:13:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:13:18,739 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 19:13:18,749 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:13:18,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 19:13:18,750 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:13:18,754 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 19:13:18,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 19:13:18,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 19:13:18,772 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 3 states. [2019-09-09 19:13:22,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:13:22,002 INFO L93 Difference]: Finished difference Result 760 states and 1275 transitions. [2019-09-09 19:13:22,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 19:13:22,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-09-09 19:13:22,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:13:22,045 INFO L225 Difference]: With dead ends: 760 [2019-09-09 19:13:22,045 INFO L226 Difference]: Without dead ends: 692 [2019-09-09 19:13:22,047 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 19:13:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2019-09-09 19:13:22,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 690. [2019-09-09 19:13:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-09-09 19:13:22,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1154 transitions. [2019-09-09 19:13:22,141 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1154 transitions. Word has length 27 [2019-09-09 19:13:22,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:13:22,142 INFO L475 AbstractCegarLoop]: Abstraction has 690 states and 1154 transitions. [2019-09-09 19:13:22,142 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 19:13:22,142 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1154 transitions. [2019-09-09 19:13:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-09 19:13:22,147 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:13:22,148 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 19:13:22,148 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:13:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:13:22,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2070667258, now seen corresponding path program 1 times [2019-09-09 19:13:22,149 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:13:22,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:22,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:13:22,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:22,153 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:13:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:13:22,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:13:22,407 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:13:22,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:13:22,408 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:13:22,409 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:13:22,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:13:22,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:13:22,411 INFO L87 Difference]: Start difference. First operand 690 states and 1154 transitions. Second operand 6 states. [2019-09-09 19:13:26,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:13:26,653 INFO L93 Difference]: Finished difference Result 1371 states and 2304 transitions. [2019-09-09 19:13:26,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 19:13:26,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2019-09-09 19:13:26,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:13:26,666 INFO L225 Difference]: With dead ends: 1371 [2019-09-09 19:13:26,666 INFO L226 Difference]: Without dead ends: 1371 [2019-09-09 19:13:26,667 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 19:13:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2019-09-09 19:13:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1342. [2019-09-09 19:13:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1342 states. [2019-09-09 19:13:26,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 2245 transitions. [2019-09-09 19:13:26,741 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 2245 transitions. Word has length 100 [2019-09-09 19:13:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:13:26,742 INFO L475 AbstractCegarLoop]: Abstraction has 1342 states and 2245 transitions. [2019-09-09 19:13:26,742 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:13:26,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 2245 transitions. [2019-09-09 19:13:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-09 19:13:26,753 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:13:26,754 INFO L399 BasicCegarLoop]: trace histogram [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 19:13:26,754 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:13:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:13:26,755 INFO L82 PathProgramCache]: Analyzing trace with hash -184529631, now seen corresponding path program 1 times [2019-09-09 19:13:26,755 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:13:26,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:26,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:13:26,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:26,757 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:13:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:13:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:13:26,918 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:13:26,918 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 19:13:26,919 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:13:26,920 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 19:13:26,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 19:13:26,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 19:13:26,921 INFO L87 Difference]: Start difference. First operand 1342 states and 2245 transitions. Second operand 5 states. [2019-09-09 19:13:31,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:13:31,365 INFO L93 Difference]: Finished difference Result 2654 states and 3852 transitions. [2019-09-09 19:13:31,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 19:13:31,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2019-09-09 19:13:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:13:31,381 INFO L225 Difference]: With dead ends: 2654 [2019-09-09 19:13:31,382 INFO L226 Difference]: Without dead ends: 2654 [2019-09-09 19:13:31,382 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 19:13:31,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2019-09-09 19:13:31,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2615. [2019-09-09 19:13:31,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2615 states. [2019-09-09 19:13:31,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3768 transitions. [2019-09-09 19:13:31,462 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3768 transitions. Word has length 103 [2019-09-09 19:13:31,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:13:31,463 INFO L475 AbstractCegarLoop]: Abstraction has 2615 states and 3768 transitions. [2019-09-09 19:13:31,463 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 19:13:31,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3768 transitions. [2019-09-09 19:13:31,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-09-09 19:13:31,465 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:13:31,466 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 19:13:31,466 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:13:31,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:13:31,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1638557581, now seen corresponding path program 1 times [2019-09-09 19:13:31,467 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:13:31,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:31,468 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:13:31,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:31,468 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:13:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:13:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:13:31,600 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:13:31,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:13:31,600 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:13:31,601 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:13:31,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:13:31,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:13:31,602 INFO L87 Difference]: Start difference. First operand 2615 states and 3768 transitions. Second operand 6 states. [2019-09-09 19:13:35,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:13:35,339 INFO L93 Difference]: Finished difference Result 3963 states and 5759 transitions. [2019-09-09 19:13:35,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:13:35,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2019-09-09 19:13:35,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:13:35,365 INFO L225 Difference]: With dead ends: 3963 [2019-09-09 19:13:35,365 INFO L226 Difference]: Without dead ends: 3963 [2019-09-09 19:13:35,367 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 19:13:35,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3963 states. [2019-09-09 19:13:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3963 to 3910. [2019-09-09 19:13:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3910 states. [2019-09-09 19:13:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3910 states to 3910 states and 5486 transitions. [2019-09-09 19:13:35,484 INFO L78 Accepts]: Start accepts. Automaton has 3910 states and 5486 transitions. Word has length 113 [2019-09-09 19:13:35,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:13:35,485 INFO L475 AbstractCegarLoop]: Abstraction has 3910 states and 5486 transitions. [2019-09-09 19:13:35,485 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:13:35,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3910 states and 5486 transitions. [2019-09-09 19:13:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-09 19:13:35,488 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:13:35,488 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 19:13:35,489 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:13:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:13:35,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1300392080, now seen corresponding path program 1 times [2019-09-09 19:13:35,489 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:13:35,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:35,492 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:13:35,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:35,493 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:13:35,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:13:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:13:35,629 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:13:35,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 19:13:35,629 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:13:35,630 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 19:13:35,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 19:13:35,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 19:13:35,631 INFO L87 Difference]: Start difference. First operand 3910 states and 5486 transitions. Second operand 5 states. [2019-09-09 19:13:41,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:13:41,050 INFO L93 Difference]: Finished difference Result 6174 states and 8533 transitions. [2019-09-09 19:13:41,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 19:13:41,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2019-09-09 19:13:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:13:41,085 INFO L225 Difference]: With dead ends: 6174 [2019-09-09 19:13:41,085 INFO L226 Difference]: Without dead ends: 6174 [2019-09-09 19:13:41,086 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 19:13:41,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6174 states. [2019-09-09 19:13:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6174 to 6153. [2019-09-09 19:13:41,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6153 states. [2019-09-09 19:13:41,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 8481 transitions. [2019-09-09 19:13:41,272 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 8481 transitions. Word has length 123 [2019-09-09 19:13:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:13:41,273 INFO L475 AbstractCegarLoop]: Abstraction has 6153 states and 8481 transitions. [2019-09-09 19:13:41,273 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 19:13:41,274 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 8481 transitions. [2019-09-09 19:13:41,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-09-09 19:13:41,275 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:13:41,276 INFO L399 BasicCegarLoop]: trace histogram [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 19:13:41,276 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:13:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:13:41,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1061863291, now seen corresponding path program 1 times [2019-09-09 19:13:41,277 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:13:41,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:41,278 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:13:41,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:41,279 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:13:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:13:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:13:41,405 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:13:41,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:13:41,405 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:13:41,405 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:13:41,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:13:41,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:13:41,406 INFO L87 Difference]: Start difference. First operand 6153 states and 8481 transitions. Second operand 4 states. [2019-09-09 19:13:47,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:13:47,385 INFO L93 Difference]: Finished difference Result 11550 states and 16887 transitions. [2019-09-09 19:13:47,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:13:47,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-09-09 19:13:47,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:13:47,461 INFO L225 Difference]: With dead ends: 11550 [2019-09-09 19:13:47,462 INFO L226 Difference]: Without dead ends: 11550 [2019-09-09 19:13:47,462 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 19:13:47,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11550 states. [2019-09-09 19:13:47,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11550 to 11543. [2019-09-09 19:13:47,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11543 states. [2019-09-09 19:13:47,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11543 states to 11543 states and 16879 transitions. [2019-09-09 19:13:47,748 INFO L78 Accepts]: Start accepts. Automaton has 11543 states and 16879 transitions. Word has length 138 [2019-09-09 19:13:47,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:13:47,750 INFO L475 AbstractCegarLoop]: Abstraction has 11543 states and 16879 transitions. [2019-09-09 19:13:47,750 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:13:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 11543 states and 16879 transitions. [2019-09-09 19:13:47,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-09-09 19:13:47,754 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:13:47,754 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 19:13:47,755 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:13:47,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:13:47,755 INFO L82 PathProgramCache]: Analyzing trace with hash 744488181, now seen corresponding path program 1 times [2019-09-09 19:13:47,755 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:13:47,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:47,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:13:47,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:47,764 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:13:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:13:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-09-09 19:13:47,944 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:13:47,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:13:47,945 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:13:47,945 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:13:47,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:13:47,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:13:47,947 INFO L87 Difference]: Start difference. First operand 11543 states and 16879 transitions. Second operand 4 states. [2019-09-09 19:13:51,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:13:51,962 INFO L93 Difference]: Finished difference Result 17818 states and 25358 transitions. [2019-09-09 19:13:51,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:13:51,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 183 [2019-09-09 19:13:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:13:52,040 INFO L225 Difference]: With dead ends: 17818 [2019-09-09 19:13:52,048 INFO L226 Difference]: Without dead ends: 17818 [2019-09-09 19:13:52,049 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 19:13:52,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17818 states. [2019-09-09 19:13:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17818 to 17159. [2019-09-09 19:13:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17159 states. [2019-09-09 19:13:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17159 states to 17159 states and 24552 transitions. [2019-09-09 19:13:52,467 INFO L78 Accepts]: Start accepts. Automaton has 17159 states and 24552 transitions. Word has length 183 [2019-09-09 19:13:52,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:13:52,468 INFO L475 AbstractCegarLoop]: Abstraction has 17159 states and 24552 transitions. [2019-09-09 19:13:52,468 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:13:52,468 INFO L276 IsEmpty]: Start isEmpty. Operand 17159 states and 24552 transitions. [2019-09-09 19:13:52,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-09-09 19:13:52,474 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:13:52,474 INFO L399 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 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] [2019-09-09 19:13:52,475 INFO L418 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:13:52,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:13:52,475 INFO L82 PathProgramCache]: Analyzing trace with hash 771825052, now seen corresponding path program 1 times [2019-09-09 19:13:52,475 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:13:52,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:52,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:13:52,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:13:52,477 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:13:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:13:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:13:52,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:13:52,692 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:13:52,694 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 201 with the following transitions: [2019-09-09 19:13:52,697 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [683], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:13:52,788 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:13:52,788 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:13:55,369 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:13:55,371 INFO L272 AbstractInterpreter]: Visited 98 different actions 98 times. Never merged. Never widened. Performed 235 root evaluator evaluations with a maximum evaluation depth of 13. Performed 235 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 19:13:55,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:13:55,375 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:13:57,895 INFO L227 lantSequenceWeakener]: Weakened 181 states. On average, predicates are now at 77.66% of their original sizes. [2019-09-09 19:13:57,895 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:13:57,969 INFO L420 sIntCurrentIteration]: We unified 199 AI predicates to 199 [2019-09-09 19:13:57,970 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:13:57,971 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:13:57,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 19:13:57,971 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:13:57,972 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 19:13:57,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 19:13:57,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 19:13:57,973 INFO L87 Difference]: Start difference. First operand 17159 states and 24552 transitions. Second operand 10 states. [2019-09-09 19:14:06,529 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:23:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:23:59,616 INFO L93 Difference]: Finished difference Result 17163 states and 24533 transitions. [2019-09-09 19:23:59,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-09 19:23:59,616 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 200 [2019-09-09 19:23:59,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:23:59,683 INFO L225 Difference]: With dead ends: 17163 [2019-09-09 19:23:59,684 INFO L226 Difference]: Without dead ends: 17163 [2019-09-09 19:23:59,684 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-09-09 19:23:59,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17163 states. [2019-09-09 19:24:00,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17163 to 17159. [2019-09-09 19:24:00,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17159 states. [2019-09-09 19:24:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17159 states to 17159 states and 24526 transitions. [2019-09-09 19:24:00,094 INFO L78 Accepts]: Start accepts. Automaton has 17159 states and 24526 transitions. Word has length 200 [2019-09-09 19:24:00,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:24:00,095 INFO L475 AbstractCegarLoop]: Abstraction has 17159 states and 24526 transitions. [2019-09-09 19:24:00,095 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-09 19:24:00,095 INFO L276 IsEmpty]: Start isEmpty. Operand 17159 states and 24526 transitions. [2019-09-09 19:24:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2019-09-09 19:24:00,101 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:24:00,102 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-09-09 19:24:00,102 INFO L418 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:24:00,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:24:00,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2066971357, now seen corresponding path program 1 times [2019-09-09 19:24:00,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:24:00,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:24:00,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:24:00,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:24:00,104 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:24:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:24:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 234 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-09 19:24:00,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:24:00,341 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:24:00,341 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 296 with the following transitions: [2019-09-09 19:24:00,342 INFO L207 CegarAbsIntRunner]: [0], [1], [74], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [197], [199], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [498], [506], [514], [522], [530], [538], [546], [554], [562], [567], [571], [582], [586], [590], [594], [598], [602], [606], [610], [614], [617], [618], [622], [626], [630], [641], [645], [649], [653], [657], [668], [672], [676], [680], [683], [684], [688], [691], [1635], [1639], [1648], [1652], [1654], [1661], [1662], [1663], [1665], [1666] [2019-09-09 19:24:00,347 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:24:00,347 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:24:01,902 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 19:24:02,611 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:24:02,612 INFO L272 AbstractInterpreter]: Visited 104 different actions 203 times. Merged at 4 different actions 5 times. Never widened. Performed 456 root evaluator evaluations with a maximum evaluation depth of 13. Performed 456 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-09-09 19:24:02,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:24:02,613 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:24:04,201 INFO L227 lantSequenceWeakener]: Weakened 292 states. On average, predicates are now at 77.43% of their original sizes. [2019-09-09 19:24:04,201 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:24:04,295 INFO L420 sIntCurrentIteration]: We unified 294 AI predicates to 294 [2019-09-09 19:24:04,295 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:24:04,296 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:24:04,296 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-09 19:24:04,296 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:24:04,296 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 19:24:04,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 19:24:04,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 19:24:04,297 INFO L87 Difference]: Start difference. First operand 17159 states and 24526 transitions. Second operand 11 states.