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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:07:49,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:07:49,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:07:49,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:07:49,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:07:49,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:07:49,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:07:49,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:07:49,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:07:49,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:07:49,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:07:49,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:07:49,521 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:07:49,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:07:49,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:07:49,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:07:49,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:07:49,525 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:07:49,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:07:49,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:07:49,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:07:49,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:07:49,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:07:49,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:07:49,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:07:49,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:07:49,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:07:49,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:07:49,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:07:49,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:07:49,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:07:49,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:07:49,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:07:49,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:07:49,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:07:49,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:07:49,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:07:49,561 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:07:49,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:07:49,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:07:49,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:07:49,563 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:07:49,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:07:49,564 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:07:49,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:07:49,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:07:49,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:07:49,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:07:49,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:07:49,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:07:49,565 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:07:49,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:07:49,565 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:07:49,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:07:49,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:07:49,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:07:49,566 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:07:49,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:07:49,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:49,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:07:49,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:07:49,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:07:49,568 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:07:49,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:07:49,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:07:49,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:07:49,850 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:07:49,870 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:07:49,874 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:07:49,875 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:07:49,876 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:07:49,876 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label54.c [2019-10-13 20:07:49,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1c813299/ccb1ebc683fd4a3ea174b304620c242c/FLAGe929c7f4a [2019-10-13 20:07:50,588 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:07:50,590 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label54.c [2019-10-13 20:07:50,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1c813299/ccb1ebc683fd4a3ea174b304620c242c/FLAGe929c7f4a [2019-10-13 20:07:50,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1c813299/ccb1ebc683fd4a3ea174b304620c242c [2019-10-13 20:07:50,873 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:07:50,875 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:07:50,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:50,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:07:50,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:07:50,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:50" (1/1) ... [2019-10-13 20:07:50,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9bc442c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:50, skipping insertion in model container [2019-10-13 20:07:50,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:50" (1/1) ... [2019-10-13 20:07:50,894 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:07:50,966 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:07:51,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:51,565 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:07:51,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:51,729 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:07:51,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:51 WrapperNode [2019-10-13 20:07:51,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:51,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:07:51,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:07:51,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:07:51,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:51" (1/1) ... [2019-10-13 20:07:51,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:51" (1/1) ... [2019-10-13 20:07:51,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:51" (1/1) ... [2019-10-13 20:07:51,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:51" (1/1) ... [2019-10-13 20:07:51,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:51" (1/1) ... [2019-10-13 20:07:51,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:51" (1/1) ... [2019-10-13 20:07:51,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:51" (1/1) ... [2019-10-13 20:07:51,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:07:51,897 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:07:51,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:07:51,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:07:51,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:51" (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 [2019-10-13 20:07:51,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:07:51,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:07:51,965 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:07:51,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:07:51,966 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:07:51,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:07:51,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:07:51,966 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:07:51,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:07:51,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:07:51,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:07:54,032 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:07:54,034 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:07:54,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:54 BoogieIcfgContainer [2019-10-13 20:07:54,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:07:54,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:07:54,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:07:54,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:07:54,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:07:50" (1/3) ... [2019-10-13 20:07:54,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e6ebc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:54, skipping insertion in model container [2019-10-13 20:07:54,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:51" (2/3) ... [2019-10-13 20:07:54,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e6ebc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:54, skipping insertion in model container [2019-10-13 20:07:54,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:54" (3/3) ... [2019-10-13 20:07:54,046 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label54.c [2019-10-13 20:07:54,055 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:07:54,064 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:07:54,075 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:07:54,108 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:07:54,108 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:07:54,109 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:07:54,109 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:07:54,109 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:07:54,110 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:07:54,110 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:07:54,111 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:07:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:07:54,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 20:07:54,152 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:54,153 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:54,156 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:54,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:54,162 INFO L82 PathProgramCache]: Analyzing trace with hash 856083907, now seen corresponding path program 1 times [2019-10-13 20:07:54,169 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:54,170 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033702109] [2019-10-13 20:07:54,170 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:54,170 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:54,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:54,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033702109] [2019-10-13 20:07:54,403 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:54,403 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:07:54,404 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768448328] [2019-10-13 20:07:54,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:07:54,411 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:54,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:07:54,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:54,431 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-13 20:07:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:55,827 INFO L93 Difference]: Finished difference Result 704 states and 1239 transitions. [2019-10-13 20:07:55,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:07:55,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-13 20:07:55,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:55,854 INFO L225 Difference]: With dead ends: 704 [2019-10-13 20:07:55,854 INFO L226 Difference]: Without dead ends: 372 [2019-10-13 20:07:55,862 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-13 20:07:55,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-13 20:07:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:07:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 524 transitions. [2019-10-13 20:07:55,942 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 524 transitions. Word has length 12 [2019-10-13 20:07:55,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:55,943 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 524 transitions. [2019-10-13 20:07:55,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:07:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 524 transitions. [2019-10-13 20:07:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 20:07:55,948 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:55,949 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:07:55,949 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:55,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:55,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1019209391, now seen corresponding path program 1 times [2019-10-13 20:07:55,950 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:55,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009122823] [2019-10-13 20:07:55,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:55,951 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:55,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:56,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009122823] [2019-10-13 20:07:56,196 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:56,197 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:07:56,197 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008739666] [2019-10-13 20:07:56,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:07:56,199 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:56,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:07:56,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:56,200 INFO L87 Difference]: Start difference. First operand 372 states and 524 transitions. Second operand 3 states. [2019-10-13 20:07:57,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:57,130 INFO L93 Difference]: Finished difference Result 1102 states and 1568 transitions. [2019-10-13 20:07:57,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:07:57,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-10-13 20:07:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:57,141 INFO L225 Difference]: With dead ends: 1102 [2019-10-13 20:07:57,141 INFO L226 Difference]: Without dead ends: 736 [2019-10-13 20:07:57,143 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2019-10-13 20:07:57,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2019-10-13 20:07:57,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2019-10-13 20:07:57,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 968 transitions. [2019-10-13 20:07:57,225 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 968 transitions. Word has length 95 [2019-10-13 20:07:57,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:57,226 INFO L462 AbstractCegarLoop]: Abstraction has 736 states and 968 transitions. [2019-10-13 20:07:57,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:07:57,226 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 968 transitions. [2019-10-13 20:07:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-13 20:07:57,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:57,229 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:07:57,230 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:57,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:57,230 INFO L82 PathProgramCache]: Analyzing trace with hash -788431111, now seen corresponding path program 1 times [2019-10-13 20:07:57,230 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:57,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633215467] [2019-10-13 20:07:57,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:57,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:57,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:57,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:57,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633215467] [2019-10-13 20:07:57,424 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:57,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:07:57,425 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302244482] [2019-10-13 20:07:57,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:07:57,426 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:57,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:07:57,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:57,427 INFO L87 Difference]: Start difference. First operand 736 states and 968 transitions. Second operand 3 states. [2019-10-13 20:07:58,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:58,574 INFO L93 Difference]: Finished difference Result 1830 states and 2479 transitions. [2019-10-13 20:07:58,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:07:58,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2019-10-13 20:07:58,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:58,582 INFO L225 Difference]: With dead ends: 1830 [2019-10-13 20:07:58,582 INFO L226 Difference]: Without dead ends: 1100 [2019-10-13 20:07:58,585 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2019-10-13 20:07:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1100. [2019-10-13 20:07:58,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1100 states. [2019-10-13 20:07:58,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1450 transitions. [2019-10-13 20:07:58,634 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1450 transitions. Word has length 107 [2019-10-13 20:07:58,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:58,635 INFO L462 AbstractCegarLoop]: Abstraction has 1100 states and 1450 transitions. [2019-10-13 20:07:58,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:07:58,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1450 transitions. [2019-10-13 20:07:58,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 20:07:58,639 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:58,639 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:58,639 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:58,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:58,640 INFO L82 PathProgramCache]: Analyzing trace with hash 481187826, now seen corresponding path program 1 times [2019-10-13 20:07:58,640 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:58,641 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723130639] [2019-10-13 20:07:58,641 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:58,641 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:58,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:58,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:58,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:58,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723130639] [2019-10-13 20:07:58,884 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:58,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:07:58,885 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160779769] [2019-10-13 20:07:58,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:07:58,888 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:58,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:07:58,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:58,888 INFO L87 Difference]: Start difference. First operand 1100 states and 1450 transitions. Second operand 3 states. [2019-10-13 20:07:59,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:59,753 INFO L93 Difference]: Finished difference Result 2740 states and 3701 transitions. [2019-10-13 20:07:59,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:07:59,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2019-10-13 20:07:59,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:59,764 INFO L225 Difference]: With dead ends: 2740 [2019-10-13 20:07:59,764 INFO L226 Difference]: Without dead ends: 1646 [2019-10-13 20:07:59,767 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:59,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-10-13 20:07:59,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1646. [2019-10-13 20:07:59,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-10-13 20:07:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2108 transitions. [2019-10-13 20:07:59,822 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2108 transitions. Word has length 124 [2019-10-13 20:07:59,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:59,823 INFO L462 AbstractCegarLoop]: Abstraction has 1646 states and 2108 transitions. [2019-10-13 20:07:59,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:07:59,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2108 transitions. [2019-10-13 20:07:59,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 20:07:59,826 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:59,827 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:07:59,827 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:59,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:59,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1056936878, now seen corresponding path program 1 times [2019-10-13 20:07:59,828 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:59,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711791125] [2019-10-13 20:07:59,828 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:59,828 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:59,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:59,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711791125] [2019-10-13 20:07:59,949 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:59,949 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:07:59,950 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736831365] [2019-10-13 20:07:59,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:07:59,950 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:59,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:07:59,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:59,951 INFO L87 Difference]: Start difference. First operand 1646 states and 2108 transitions. Second operand 3 states. [2019-10-13 20:08:00,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:00,757 INFO L93 Difference]: Finished difference Result 3832 states and 5023 transitions. [2019-10-13 20:08:00,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:08:00,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2019-10-13 20:08:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:00,770 INFO L225 Difference]: With dead ends: 3832 [2019-10-13 20:08:00,771 INFO L226 Difference]: Without dead ends: 2192 [2019-10-13 20:08:00,775 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:08:00,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2192 states. [2019-10-13 20:08:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2192 to 2192. [2019-10-13 20:08:00,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2192 states. [2019-10-13 20:08:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2192 states to 2192 states and 2772 transitions. [2019-10-13 20:08:00,842 INFO L78 Accepts]: Start accepts. Automaton has 2192 states and 2772 transitions. Word has length 142 [2019-10-13 20:08:00,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:00,843 INFO L462 AbstractCegarLoop]: Abstraction has 2192 states and 2772 transitions. [2019-10-13 20:08:00,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:08:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2192 states and 2772 transitions. [2019-10-13 20:08:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-10-13 20:08:00,849 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:00,850 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 20:08:00,850 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:00,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:00,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1291514030, now seen corresponding path program 1 times [2019-10-13 20:08:00,851 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:00,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163851515] [2019-10-13 20:08:00,851 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:00,851 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:00,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 99 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:08:01,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163851515] [2019-10-13 20:08:01,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935757943] [2019-10-13 20:08:01,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:08:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:01,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:08:01,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:01,526 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 20:08:01,527 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 10 proven. 99 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:08:01,694 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:08:01,695 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:08:01,695 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154118841] [2019-10-13 20:08:01,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:08:01,696 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:01,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:08:01,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:08:01,697 INFO L87 Difference]: Start difference. First operand 2192 states and 2772 transitions. Second operand 5 states. [2019-10-13 20:08:02,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:02,972 INFO L93 Difference]: Finished difference Result 5350 states and 7129 transitions. [2019-10-13 20:08:02,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 20:08:02,977 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2019-10-13 20:08:02,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:02,999 INFO L225 Difference]: With dead ends: 5350 [2019-10-13 20:08:03,000 INFO L226 Difference]: Without dead ends: 3346 [2019-10-13 20:08:03,005 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 504 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:08:03,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2019-10-13 20:08:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 3306. [2019-10-13 20:08:03,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3306 states. [2019-10-13 20:08:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 4121 transitions. [2019-10-13 20:08:03,107 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 4121 transitions. Word has length 255 [2019-10-13 20:08:03,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:03,107 INFO L462 AbstractCegarLoop]: Abstraction has 3306 states and 4121 transitions. [2019-10-13 20:08:03,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:08:03,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 4121 transitions. [2019-10-13 20:08:03,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2019-10-13 20:08:03,114 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:03,115 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 20:08:03,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:08:03,320 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:03,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:03,322 INFO L82 PathProgramCache]: Analyzing trace with hash 265461364, now seen corresponding path program 1 times [2019-10-13 20:08:03,322 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:03,323 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219025133] [2019-10-13 20:08:03,323 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:03,323 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:03,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 101 proven. 142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:08:04,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219025133] [2019-10-13 20:08:04,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555148776] [2019-10-13 20:08:04,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:08:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:04,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:08:04,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-10-13 20:08:04,482 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2019-10-13 20:08:04,572 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:08:04,572 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [12] total 13 [2019-10-13 20:08:04,573 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862622516] [2019-10-13 20:08:04,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:08:04,574 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:04,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:08:04,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-13 20:08:04,575 INFO L87 Difference]: Start difference. First operand 3306 states and 4121 transitions. Second operand 3 states. [2019-10-13 20:08:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:05,310 INFO L93 Difference]: Finished difference Result 7880 states and 9850 transitions. [2019-10-13 20:08:05,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:08:05,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 282 [2019-10-13 20:08:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:05,331 INFO L225 Difference]: With dead ends: 7880 [2019-10-13 20:08:05,332 INFO L226 Difference]: Without dead ends: 4034 [2019-10-13 20:08:05,341 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 563 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-13 20:08:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4034 states. [2019-10-13 20:08:05,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4034 to 4034. [2019-10-13 20:08:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4034 states. [2019-10-13 20:08:05,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4034 states to 4034 states and 4865 transitions. [2019-10-13 20:08:05,440 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 4865 transitions. Word has length 282 [2019-10-13 20:08:05,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:05,441 INFO L462 AbstractCegarLoop]: Abstraction has 4034 states and 4865 transitions. [2019-10-13 20:08:05,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:08:05,441 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 4865 transitions. [2019-10-13 20:08:05,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2019-10-13 20:08:05,447 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:05,447 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 20:08:05,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:08:05,659 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:05,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:05,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1082331696, now seen corresponding path program 1 times [2019-10-13 20:08:05,660 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:05,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418389917] [2019-10-13 20:08:05,661 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:05,661 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:05,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 101 proven. 146 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:08:06,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418389917] [2019-10-13 20:08:06,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479661528] [2019-10-13 20:08:06,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:08:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:06,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:08:06,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 20:08:06,844 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 20:08:07,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1950428303] [2019-10-13 20:08:07,016 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 285 [2019-10-13 20:08:07,078 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:08:07,078 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:08:20,286 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:08:20,288 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 485 root evaluator evaluations with a maximum evaluation depth of 13. Performed 485 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-13 20:08:20,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:20,292 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:08:24,318 INFO L227 lantSequenceWeakener]: Weakened 281 states. On average, predicates are now at 77.2% of their original sizes. [2019-10-13 20:08:24,318 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:08:24,402 INFO L553 sIntCurrentIteration]: We unified 283 AI predicates to 283 [2019-10-13 20:08:24,403 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:08:24,403 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:08:24,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 5, 5] total 26 [2019-10-13 20:08:24,406 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385308335] [2019-10-13 20:08:24,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 20:08:24,410 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:24,410 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:08:24,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 20:08:24,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:08:24,411 INFO L87 Difference]: Start difference. First operand 4034 states and 4865 transitions. Second operand 11 states.