java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 19:56:14,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 19:56:14,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 19:56:14,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 19:56:14,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 19:56:14,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 19:56:14,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 19:56:14,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 19:56:14,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 19:56:14,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 19:56:14,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 19:56:14,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 19:56:14,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 19:56:14,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 19:56:14,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 19:56:14,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 19:56:14,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 19:56:14,767 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 19:56:14,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 19:56:14,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 19:56:14,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 19:56:14,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 19:56:14,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 19:56:14,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 19:56:14,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 19:56:14,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 19:56:14,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 19:56:14,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 19:56:14,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 19:56:14,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 19:56:14,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 19:56:14,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 19:56:14,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 19:56:14,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 19:56:14,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 19:56:14,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 19:56:14,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 19:56:14,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 19:56:14,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 19:56:14,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 19:56:14,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 19:56:14,788 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 19:56:14,804 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 19:56:14,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 19:56:14,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 19:56:14,805 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 19:56:14,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 19:56:14,806 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 19:56:14,806 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 19:56:14,806 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 19:56:14,806 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 19:56:14,806 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 19:56:14,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 19:56:14,807 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 19:56:14,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 19:56:14,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 19:56:14,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 19:56:14,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 19:56:14,808 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 19:56:14,808 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 19:56:14,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 19:56:14,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 19:56:14,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 19:56:14,809 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 19:56:14,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 19:56:14,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 19:56:14,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 19:56:14,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 19:56:14,810 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 19:56:14,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 19:56:14,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 19:56:14,811 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 19:56:14,842 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 19:56:14,855 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 19:56:14,858 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 19:56:14,860 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 19:56:14,860 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 19:56:14,861 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label10.c [2019-09-09 19:56:14,929 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47cbd3fd1/db1eb67b97e3458db82a1570d3e94191/FLAGa978dca11 [2019-09-09 19:56:15,626 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 19:56:15,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label10.c [2019-09-09 19:56:15,643 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47cbd3fd1/db1eb67b97e3458db82a1570d3e94191/FLAGa978dca11 [2019-09-09 19:56:15,793 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47cbd3fd1/db1eb67b97e3458db82a1570d3e94191 [2019-09-09 19:56:15,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 19:56:15,803 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 19:56:15,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 19:56:15,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 19:56:15,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 19:56:15,808 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:56:15" (1/1) ... [2019-09-09 19:56:15,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e607a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:56:15, skipping insertion in model container [2019-09-09 19:56:15,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 07:56:15" (1/1) ... [2019-09-09 19:56:15,819 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 19:56:15,905 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 19:56:16,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:56:16,733 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 19:56:17,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 19:56:17,063 INFO L192 MainTranslator]: Completed translation [2019-09-09 19:56:17,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:56:17 WrapperNode [2019-09-09 19:56:17,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 19:56:17,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 19:56:17,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 19:56:17,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 19:56:17,084 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:56:17" (1/1) ... [2019-09-09 19:56:17,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:56:17" (1/1) ... [2019-09-09 19:56:17,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:56:17" (1/1) ... [2019-09-09 19:56:17,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:56:17" (1/1) ... [2019-09-09 19:56:17,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:56:17" (1/1) ... [2019-09-09 19:56:17,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:56:17" (1/1) ... [2019-09-09 19:56:17,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:56:17" (1/1) ... [2019-09-09 19:56:17,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 19:56:17,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 19:56:17,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 19:56:17,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 19:56:17,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:56:17" (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 19:56:17,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 19:56:17,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 19:56:17,293 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 19:56:17,294 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 19:56:17,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 19:56:17,294 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 19:56:17,294 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 19:56:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 19:56:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 19:56:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 19:56:17,295 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 19:56:17,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 19:56:17,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 19:56:19,971 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 19:56:19,971 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 19:56:19,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:56:19 BoogieIcfgContainer [2019-09-09 19:56:19,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 19:56:19,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 19:56:19,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 19:56:19,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 19:56:19,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 07:56:15" (1/3) ... [2019-09-09 19:56:19,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e30a155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:56:19, skipping insertion in model container [2019-09-09 19:56:19,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 07:56:17" (2/3) ... [2019-09-09 19:56:19,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e30a155 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 07:56:19, skipping insertion in model container [2019-09-09 19:56:19,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 07:56:19" (3/3) ... [2019-09-09 19:56:19,987 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label10.c [2019-09-09 19:56:20,001 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 19:56:20,010 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 19:56:20,029 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 19:56:20,061 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 19:56:20,061 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 19:56:20,061 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 19:56:20,061 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 19:56:20,061 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 19:56:20,061 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 19:56:20,062 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 19:56:20,062 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 19:56:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-09-09 19:56:20,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-09 19:56:20,113 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:56:20,114 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:56:20,116 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:56:20,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:56:20,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1129192547, now seen corresponding path program 1 times [2019-09-09 19:56:20,124 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:56:20,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:56:20,175 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:56:20,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:56:20,176 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:56:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:56:20,449 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 19:56:20,451 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:56:20,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:56:20,452 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:56:20,457 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:56:20,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:56:20,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:56:20,475 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-09-09 19:56:24,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:56:24,391 INFO L93 Difference]: Finished difference Result 1106 states and 1888 transitions. [2019-09-09 19:56:24,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:56:24,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-09-09 19:56:24,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:56:24,425 INFO L225 Difference]: With dead ends: 1106 [2019-09-09 19:56:24,425 INFO L226 Difference]: Without dead ends: 1019 [2019-09-09 19:56:24,427 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 19:56:24,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-09-09 19:56:24,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1019. [2019-09-09 19:56:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2019-09-09 19:56:24,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1739 transitions. [2019-09-09 19:56:24,558 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1739 transitions. Word has length 38 [2019-09-09 19:56:24,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:56:24,559 INFO L475 AbstractCegarLoop]: Abstraction has 1019 states and 1739 transitions. [2019-09-09 19:56:24,559 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:56:24,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1739 transitions. [2019-09-09 19:56:24,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-09 19:56:24,565 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:56:24,565 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:56:24,565 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:56:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:56:24,568 INFO L82 PathProgramCache]: Analyzing trace with hash -2138729124, now seen corresponding path program 1 times [2019-09-09 19:56:24,569 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:56:24,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:56:24,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:56:24,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:56:24,571 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:56:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:56:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:56:24,763 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:56:24,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:56:24,763 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:56:24,768 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:56:24,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:56:24,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:56:24,770 INFO L87 Difference]: Start difference. First operand 1019 states and 1739 transitions. Second operand 6 states. [2019-09-09 19:56:27,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:56:27,954 INFO L93 Difference]: Finished difference Result 2084 states and 3454 transitions. [2019-09-09 19:56:27,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:56:27,956 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-09-09 19:56:27,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:56:27,975 INFO L225 Difference]: With dead ends: 2084 [2019-09-09 19:56:27,976 INFO L226 Difference]: Without dead ends: 2084 [2019-09-09 19:56:27,977 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 19:56:27,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2019-09-09 19:56:28,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2061. [2019-09-09 19:56:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2061 states. [2019-09-09 19:56:28,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3384 transitions. [2019-09-09 19:56:28,123 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3384 transitions. Word has length 108 [2019-09-09 19:56:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:56:28,125 INFO L475 AbstractCegarLoop]: Abstraction has 2061 states and 3384 transitions. [2019-09-09 19:56:28,125 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:56:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3384 transitions. [2019-09-09 19:56:28,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-09 19:56:28,134 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:56:28,135 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:56:28,135 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:56:28,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:56:28,136 INFO L82 PathProgramCache]: Analyzing trace with hash -899506204, now seen corresponding path program 1 times [2019-09-09 19:56:28,137 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:56:28,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:56:28,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:56:28,139 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:56:28,139 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:56:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:56:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:56:28,351 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:56:28,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:56:28,351 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:56:28,354 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:56:28,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:56:28,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:56:28,354 INFO L87 Difference]: Start difference. First operand 2061 states and 3384 transitions. Second operand 6 states. [2019-09-09 19:56:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:56:31,789 INFO L93 Difference]: Finished difference Result 3849 states and 6346 transitions. [2019-09-09 19:56:31,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:56:31,792 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2019-09-09 19:56:31,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:56:31,818 INFO L225 Difference]: With dead ends: 3849 [2019-09-09 19:56:31,818 INFO L226 Difference]: Without dead ends: 3849 [2019-09-09 19:56:31,819 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 19:56:31,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2019-09-09 19:56:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3813. [2019-09-09 19:56:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3813 states. [2019-09-09 19:56:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 6183 transitions. [2019-09-09 19:56:31,933 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 6183 transitions. Word has length 136 [2019-09-09 19:56:31,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:56:31,934 INFO L475 AbstractCegarLoop]: Abstraction has 3813 states and 6183 transitions. [2019-09-09 19:56:31,934 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:56:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 6183 transitions. [2019-09-09 19:56:31,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-09 19:56:31,936 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:56:31,937 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:56:31,937 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:56:31,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:56:31,938 INFO L82 PathProgramCache]: Analyzing trace with hash -387784608, now seen corresponding path program 1 times [2019-09-09 19:56:31,938 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:56:31,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:56:31,939 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:56:31,939 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:56:31,939 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:56:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:56:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:56:32,072 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:56:32,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:56:32,072 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:56:32,073 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:56:32,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:56:32,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:56:32,073 INFO L87 Difference]: Start difference. First operand 3813 states and 6183 transitions. Second operand 6 states. [2019-09-09 19:56:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:56:34,615 INFO L93 Difference]: Finished difference Result 5942 states and 8256 transitions. [2019-09-09 19:56:34,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:56:34,615 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 154 [2019-09-09 19:56:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:56:34,648 INFO L225 Difference]: With dead ends: 5942 [2019-09-09 19:56:34,648 INFO L226 Difference]: Without dead ends: 5942 [2019-09-09 19:56:34,649 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 19:56:34,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2019-09-09 19:56:34,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 5896. [2019-09-09 19:56:34,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5896 states. [2019-09-09 19:56:34,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 8054 transitions. [2019-09-09 19:56:34,858 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 8054 transitions. Word has length 154 [2019-09-09 19:56:34,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:56:34,858 INFO L475 AbstractCegarLoop]: Abstraction has 5896 states and 8054 transitions. [2019-09-09 19:56:34,858 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:56:34,859 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 8054 transitions. [2019-09-09 19:56:34,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-09-09 19:56:34,861 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:56:34,861 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:56:34,862 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:56:34,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:56:34,862 INFO L82 PathProgramCache]: Analyzing trace with hash 215437429, now seen corresponding path program 1 times [2019-09-09 19:56:34,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:56:34,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:56:34,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:56:34,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:56:34,864 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:56:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:56:35,044 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 19:56:35,045 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:56:35,045 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 19:56:35,045 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:56:35,046 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 19:56:35,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 19:56:35,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 19:56:35,047 INFO L87 Difference]: Start difference. First operand 5896 states and 8054 transitions. Second operand 6 states. [2019-09-09 19:56:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:56:37,672 INFO L93 Difference]: Finished difference Result 8685 states and 11567 transitions. [2019-09-09 19:56:37,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 19:56:37,674 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 201 [2019-09-09 19:56:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:56:37,712 INFO L225 Difference]: With dead ends: 8685 [2019-09-09 19:56:37,712 INFO L226 Difference]: Without dead ends: 8685 [2019-09-09 19:56:37,713 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 19:56:37,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8685 states. [2019-09-09 19:56:37,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8685 to 8651. [2019-09-09 19:56:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8651 states. [2019-09-09 19:56:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 11412 transitions. [2019-09-09 19:56:37,895 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 11412 transitions. Word has length 201 [2019-09-09 19:56:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:56:37,896 INFO L475 AbstractCegarLoop]: Abstraction has 8651 states and 11412 transitions. [2019-09-09 19:56:37,896 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 19:56:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 11412 transitions. [2019-09-09 19:56:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-09-09 19:56:37,899 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:56:37,900 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:56:37,900 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:56:37,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:56:37,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1906343064, now seen corresponding path program 1 times [2019-09-09 19:56:37,900 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:56:37,903 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:56:37,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:56:37,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:56:37,904 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:56:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:56:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-09-09 19:56:38,073 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 19:56:38,074 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 19:56:38,074 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:56:38,075 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 19:56:38,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 19:56:38,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 19:56:38,075 INFO L87 Difference]: Start difference. First operand 8651 states and 11412 transitions. Second operand 4 states. [2019-09-09 19:56:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 19:56:41,209 INFO L93 Difference]: Finished difference Result 14417 states and 18240 transitions. [2019-09-09 19:56:41,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 19:56:41,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2019-09-09 19:56:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 19:56:41,266 INFO L225 Difference]: With dead ends: 14417 [2019-09-09 19:56:41,266 INFO L226 Difference]: Without dead ends: 14417 [2019-09-09 19:56:41,266 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 19:56:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14417 states. [2019-09-09 19:56:41,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14417 to 13741. [2019-09-09 19:56:41,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13741 states. [2019-09-09 19:56:41,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13741 states to 13741 states and 17470 transitions. [2019-09-09 19:56:41,642 INFO L78 Accepts]: Start accepts. Automaton has 13741 states and 17470 transitions. Word has length 237 [2019-09-09 19:56:41,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 19:56:41,642 INFO L475 AbstractCegarLoop]: Abstraction has 13741 states and 17470 transitions. [2019-09-09 19:56:41,642 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 19:56:41,643 INFO L276 IsEmpty]: Start isEmpty. Operand 13741 states and 17470 transitions. [2019-09-09 19:56:41,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2019-09-09 19:56:41,661 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 19:56:41,661 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 19:56:41,662 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 19:56:41,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:56:41,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1225908112, now seen corresponding path program 1 times [2019-09-09 19:56:41,663 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 19:56:41,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:56:41,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 19:56:41,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 19:56:41,664 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 19:56:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 19:56:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 210 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-09-09 19:56:42,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 19:56:42,060 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 19:56:42,061 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 421 with the following transitions: [2019-09-09 19:56:42,063 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [387], [391], [393], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [837], [841], [845], [849], [853], [856], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [912], [913], [917], [921], [925], [929], [933], [937], [941], [945], [948], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-09-09 19:56:42,144 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 19:56:42,144 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 19:56:51,724 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 19:56:51,726 INFO L272 AbstractInterpreter]: Visited 144 different actions 144 times. Never merged. Never widened. Performed 315 root evaluator evaluations with a maximum evaluation depth of 14. Performed 315 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 19:56:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 19:56:51,730 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 19:57:07,180 INFO L227 lantSequenceWeakener]: Weakened 396 states. On average, predicates are now at 77.57% of their original sizes. [2019-09-09 19:57:07,180 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 19:57:07,299 INFO L420 sIntCurrentIteration]: We unified 419 AI predicates to 419 [2019-09-09 19:57:07,299 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 19:57:07,300 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 19:57:07,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [6] total 16 [2019-09-09 19:57:07,301 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 19:57:07,302 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 19:57:07,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 19:57:07,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-09-09 19:57:07,303 INFO L87 Difference]: Start difference. First operand 13741 states and 17470 transitions. Second operand 12 states. [2019-09-09 19:57:36,662 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.