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_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 20:05:56,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 20:05:56,672 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 20:05:56,689 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 20:05:56,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 20:05:56,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 20:05:56,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 20:05:56,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 20:05:56,695 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 20:05:56,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 20:05:56,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 20:05:56,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 20:05:56,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 20:05:56,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 20:05:56,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 20:05:56,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 20:05:56,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 20:05:56,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 20:05:56,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 20:05:56,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 20:05:56,709 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 20:05:56,710 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 20:05:56,711 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 20:05:56,712 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 20:05:56,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-09 20:05:56,715 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-09 20:05:56,715 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-09 20:05:56,716 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-09 20:05:56,716 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-09 20:05:56,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-09 20:05:56,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 20:05:56,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 20:05:56,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 20:05:56,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 20:05:56,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 20:05:56,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 20:05:56,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 20:05:56,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 20:05:56,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 20:05:56,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 20:05:56,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 20:05:56,725 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 20:05:56,751 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 20:05:56,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 20:05:56,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 20:05:56,752 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 20:05:56,753 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 20:05:56,753 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 20:05:56,753 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 20:05:56,754 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 20:05:56,754 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 20:05:56,754 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 20:05:56,755 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 20:05:56,755 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 20:05:56,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 20:05:56,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 20:05:56,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 20:05:56,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 20:05:56,756 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 20:05:56,756 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 20:05:56,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 20:05:56,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 20:05:56,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 20:05:56,757 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 20:05:56,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 20:05:56,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 20:05:56,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 20:05:56,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 20:05:56,758 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 20:05:56,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 20:05:56,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 20:05:56,758 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 20:05:56,789 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 20:05:56,805 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 20:05:56,810 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 20:05:56,811 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 20:05:56,811 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 20:05:56,812 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label18.c [2019-09-09 20:05:56,871 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3634623e5/c7c8b316f24643558b90368004d5a589/FLAGd9884cb92 [2019-09-09 20:05:57,526 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 20:05:57,527 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label18.c [2019-09-09 20:05:57,546 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3634623e5/c7c8b316f24643558b90368004d5a589/FLAGd9884cb92 [2019-09-09 20:05:57,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3634623e5/c7c8b316f24643558b90368004d5a589 [2019-09-09 20:05:57,714 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 20:05:57,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 20:05:57,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 20:05:57,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 20:05:57,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 20:05:57,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:05:57" (1/1) ... [2019-09-09 20:05:57,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2106d50c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:05:57, skipping insertion in model container [2019-09-09 20:05:57,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 08:05:57" (1/1) ... [2019-09-09 20:05:57,732 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 20:05:57,824 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 20:05:58,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:05:58,841 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 20:05:59,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 20:05:59,133 INFO L192 MainTranslator]: Completed translation [2019-09-09 20:05:59,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:05:59 WrapperNode [2019-09-09 20:05:59,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 20:05:59,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 20:05:59,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 20:05:59,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 20:05:59,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:05:59" (1/1) ... [2019-09-09 20:05:59,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:05:59" (1/1) ... [2019-09-09 20:05:59,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:05:59" (1/1) ... [2019-09-09 20:05:59,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:05:59" (1/1) ... [2019-09-09 20:05:59,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:05:59" (1/1) ... [2019-09-09 20:05:59,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:05:59" (1/1) ... [2019-09-09 20:05:59,287 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:05:59" (1/1) ... [2019-09-09 20:05:59,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 20:05:59,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 20:05:59,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 20:05:59,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 20:05:59,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:05:59" (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 20:05:59,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 20:05:59,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 20:05:59,358 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 20:05:59,358 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 20:05:59,359 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 20:05:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 20:05:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 20:05:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 20:05:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 20:05:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 20:05:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 20:05:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 20:05:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 20:06:02,220 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 20:06:02,221 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 20:06:02,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:06:02 BoogieIcfgContainer [2019-09-09 20:06:02,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 20:06:02,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 20:06:02,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 20:06:02,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 20:06:02,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 08:05:57" (1/3) ... [2019-09-09 20:06:02,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2012f171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:06:02, skipping insertion in model container [2019-09-09 20:06:02,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 08:05:59" (2/3) ... [2019-09-09 20:06:02,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2012f171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 08:06:02, skipping insertion in model container [2019-09-09 20:06:02,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 08:06:02" (3/3) ... [2019-09-09 20:06:02,237 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label18.c [2019-09-09 20:06:02,250 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 20:06:02,262 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 20:06:02,282 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 20:06:02,317 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 20:06:02,317 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 20:06:02,317 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 20:06:02,317 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 20:06:02,317 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 20:06:02,318 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 20:06:02,319 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 20:06:02,319 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 20:06:02,366 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-09-09 20:06:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-09 20:06:02,379 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:06:02,380 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:06:02,383 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:06:02,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:06:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash 380431882, now seen corresponding path program 1 times [2019-09-09 20:06:02,396 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:06:02,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:06:02,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:06:02,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:06:02,477 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:06:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:06:02,781 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 20:06:02,784 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:06:02,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 20:06:02,785 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:06:02,792 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 20:06:02,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 20:06:02,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 20:06:02,822 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-09-09 20:06:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:06:05,885 INFO L93 Difference]: Finished difference Result 750 states and 1301 transitions. [2019-09-09 20:06:05,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 20:06:05,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-09 20:06:05,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:06:05,929 INFO L225 Difference]: With dead ends: 750 [2019-09-09 20:06:05,930 INFO L226 Difference]: Without dead ends: 682 [2019-09-09 20:06:05,933 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 20:06:05,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-09-09 20:06:06,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-09-09 20:06:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-09-09 20:06:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-09-09 20:06:06,044 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 13 [2019-09-09 20:06:06,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:06:06,045 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-09-09 20:06:06,045 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 20:06:06,046 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-09-09 20:06:06,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-09 20:06:06,050 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:06:06,051 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 20:06:06,051 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:06:06,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:06:06,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1298207030, now seen corresponding path program 1 times [2019-09-09 20:06:06,053 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:06:06,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:06:06,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:06:06,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:06:06,056 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:06:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:06:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:06:06,316 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:06:06,317 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:06:06,317 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:06:06,319 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:06:06,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:06:06,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:06:06,321 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 6 states. [2019-09-09 20:06:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:06:09,538 INFO L93 Difference]: Finished difference Result 1387 states and 2310 transitions. [2019-09-09 20:06:09,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:06:09,545 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2019-09-09 20:06:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:06:09,559 INFO L225 Difference]: With dead ends: 1387 [2019-09-09 20:06:09,560 INFO L226 Difference]: Without dead ends: 1387 [2019-09-09 20:06:09,560 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 20:06:09,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2019-09-09 20:06:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1372. [2019-09-09 20:06:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-09-09 20:06:09,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2274 transitions. [2019-09-09 20:06:09,624 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2274 transitions. Word has length 83 [2019-09-09 20:06:09,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:06:09,625 INFO L475 AbstractCegarLoop]: Abstraction has 1372 states and 2274 transitions. [2019-09-09 20:06:09,626 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:06:09,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2274 transitions. [2019-09-09 20:06:09,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-09 20:06:09,631 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:06:09,632 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 20:06:09,632 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:06:09,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:06:09,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1455204626, now seen corresponding path program 1 times [2019-09-09 20:06:09,633 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:06:09,635 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:06:09,635 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:06:09,636 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:06:09,636 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:06:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:06:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:06:09,793 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:06:09,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:06:09,794 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:06:09,794 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:06:09,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:06:09,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:06:09,795 INFO L87 Difference]: Start difference. First operand 1372 states and 2274 transitions. Second operand 6 states. [2019-09-09 20:06:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:06:13,162 INFO L93 Difference]: Finished difference Result 2100 states and 3398 transitions. [2019-09-09 20:06:13,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:06:13,163 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2019-09-09 20:06:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:06:13,176 INFO L225 Difference]: With dead ends: 2100 [2019-09-09 20:06:13,176 INFO L226 Difference]: Without dead ends: 2100 [2019-09-09 20:06:13,177 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 20:06:13,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-09-09 20:06:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2073. [2019-09-09 20:06:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2073 states. [2019-09-09 20:06:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 3322 transitions. [2019-09-09 20:06:13,244 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 3322 transitions. Word has length 87 [2019-09-09 20:06:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:06:13,245 INFO L475 AbstractCegarLoop]: Abstraction has 2073 states and 3322 transitions. [2019-09-09 20:06:13,245 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:06:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 3322 transitions. [2019-09-09 20:06:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-09-09 20:06:13,248 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:06:13,248 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 20:06:13,248 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:06:13,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:06:13,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1551696607, now seen corresponding path program 1 times [2019-09-09 20:06:13,249 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:06:13,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:06:13,250 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:06:13,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:06:13,251 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:06:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:06:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:06:13,429 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:06:13,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:06:13,430 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:06:13,432 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:06:13,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:06:13,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:06:13,433 INFO L87 Difference]: Start difference. First operand 2073 states and 3322 transitions. Second operand 6 states. [2019-09-09 20:06:17,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:06:17,699 INFO L93 Difference]: Finished difference Result 3149 states and 4752 transitions. [2019-09-09 20:06:17,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:06:17,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 118 [2019-09-09 20:06:17,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:06:17,726 INFO L225 Difference]: With dead ends: 3149 [2019-09-09 20:06:17,726 INFO L226 Difference]: Without dead ends: 3149 [2019-09-09 20:06:17,727 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 20:06:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2019-09-09 20:06:17,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 3128. [2019-09-09 20:06:17,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3128 states. [2019-09-09 20:06:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 4658 transitions. [2019-09-09 20:06:17,884 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 4658 transitions. Word has length 118 [2019-09-09 20:06:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:06:17,885 INFO L475 AbstractCegarLoop]: Abstraction has 3128 states and 4658 transitions. [2019-09-09 20:06:17,885 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:06:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 4658 transitions. [2019-09-09 20:06:17,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-09 20:06:17,894 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:06:17,895 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 20:06:17,895 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:06:17,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:06:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash -608929417, now seen corresponding path program 1 times [2019-09-09 20:06:17,896 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:06:17,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:06:17,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:06:17,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:06:17,897 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:06:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:06:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 20:06:18,128 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 20:06:18,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 20:06:18,128 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:06:18,129 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 20:06:18,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 20:06:18,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-09 20:06:18,130 INFO L87 Difference]: Start difference. First operand 3128 states and 4658 transitions. Second operand 6 states. [2019-09-09 20:06:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 20:06:23,126 INFO L93 Difference]: Finished difference Result 6967 states and 10600 transitions. [2019-09-09 20:06:23,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 20:06:23,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2019-09-09 20:06:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 20:06:23,174 INFO L225 Difference]: With dead ends: 6967 [2019-09-09 20:06:23,175 INFO L226 Difference]: Without dead ends: 6967 [2019-09-09 20:06:23,175 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-09 20:06:23,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6967 states. [2019-09-09 20:06:23,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6967 to 6961. [2019-09-09 20:06:23,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6961 states. [2019-09-09 20:06:23,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6961 states to 6961 states and 10571 transitions. [2019-09-09 20:06:23,446 INFO L78 Accepts]: Start accepts. Automaton has 6961 states and 10571 transitions. Word has length 162 [2019-09-09 20:06:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 20:06:23,447 INFO L475 AbstractCegarLoop]: Abstraction has 6961 states and 10571 transitions. [2019-09-09 20:06:23,448 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 20:06:23,448 INFO L276 IsEmpty]: Start isEmpty. Operand 6961 states and 10571 transitions. [2019-09-09 20:06:23,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-09-09 20:06:23,453 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 20:06:23,454 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 20:06:23,454 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 20:06:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:06:23,455 INFO L82 PathProgramCache]: Analyzing trace with hash -316177178, now seen corresponding path program 1 times [2019-09-09 20:06:23,455 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 20:06:23,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:06:23,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 20:06:23,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 20:06:23,458 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 20:06:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 20:06:23,628 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 20:06:23,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 20:06:23,629 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 20:06:23,630 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 234 with the following transitions: [2019-09-09 20:06:23,633 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [191], [193], [196], [204], [212], [220], [228], [236], [244], [252], [260], [268], [276], [284], [292], [300], [308], [316], [324], [332], [340], [348], [356], [364], [372], [380], [388], [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], [680], [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], [857], [861], [865], [869], [873], [877], [881], [885], [889], [893], [897], [901], [905], [909], [913], [917], [921], [925], [929], [933], [937], [941], [945], [949], [953], [957], [961], [965], [969], [973], [977], [981], [985], [989], [992], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-09-09 20:06:23,722 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 20:06:23,722 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 20:06:33,906 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 20:06:33,908 INFO L272 AbstractInterpreter]: Visited 154 different actions 154 times. Never merged. Never widened. Performed 325 root evaluator evaluations with a maximum evaluation depth of 14. Performed 325 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 20:06:33,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 20:06:33,912 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 20:06:40,794 INFO L227 lantSequenceWeakener]: Weakened 214 states. On average, predicates are now at 77.3% of their original sizes. [2019-09-09 20:06:40,795 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 20:06:40,883 INFO L420 sIntCurrentIteration]: We unified 232 AI predicates to 232 [2019-09-09 20:06:40,883 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 20:06:40,884 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 20:06:40,884 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 15 [2019-09-09 20:06:40,884 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 20:06:40,885 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 20:06:40,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 20:06:40,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-09-09 20:06:40,886 INFO L87 Difference]: Start difference. First operand 6961 states and 10571 transitions. Second operand 12 states. [2019-09-09 20:07:05,365 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.