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/Problem02_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:55:30,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:55:30,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:55:30,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:55:30,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:55:30,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:55:30,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:55:30,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:55:30,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:55:30,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:55:30,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:55:30,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:55:30,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:55:30,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:55:30,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:55:30,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:55:30,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:55:30,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:55:30,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:55:30,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:55:30,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:55:30,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:55:30,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:55:30,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:55:30,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:55:30,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:55:30,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:55:30,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:55:30,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:55:30,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:55:30,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:55:30,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:55:30,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:55:30,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:55:30,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:55:30,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:55:30,098 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 [2019-10-14 23:55:30,120 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:55:30,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:55:30,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:55:30,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:55:30,122 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:55:30,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:55:30,123 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:55:30,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:55:30,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:55:30,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:55:30,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:55:30,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:55:30,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:55:30,125 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:55:30,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:55:30,126 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:55:30,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:55:30,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:55:30,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:55:30,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:55:30,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:55:30,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:55:30,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:55:30,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:55:30,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:55:30,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:55:30,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:55:30,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:55:30,128 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 [2019-10-14 23:55:30,391 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:55:30,404 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:55:30,408 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:55:30,409 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:55:30,409 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:55:30,410 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label03.c [2019-10-14 23:55:30,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e76b15d40/4353df1d89164135bf555f3c4a966956/FLAGadca5e598 [2019-10-14 23:55:31,011 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:55:31,012 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label03.c [2019-10-14 23:55:31,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e76b15d40/4353df1d89164135bf555f3c4a966956/FLAGadca5e598 [2019-10-14 23:55:31,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e76b15d40/4353df1d89164135bf555f3c4a966956 [2019-10-14 23:55:31,305 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:55:31,307 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:55:31,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:31,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:55:31,311 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:55:31,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:31" (1/1) ... [2019-10-14 23:55:31,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53ed5976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:31, skipping insertion in model container [2019-10-14 23:55:31,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:31" (1/1) ... [2019-10-14 23:55:31,323 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:55:31,377 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:55:31,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:31,887 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:55:32,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:32,060 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:55:32,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:32 WrapperNode [2019-10-14 23:55:32,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:32,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:55:32,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:55:32,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:55:32,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:32" (1/1) ... [2019-10-14 23:55:32,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:32" (1/1) ... [2019-10-14 23:55:32,093 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:32" (1/1) ... [2019-10-14 23:55:32,094 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:32" (1/1) ... [2019-10-14 23:55:32,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:32" (1/1) ... [2019-10-14 23:55:32,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:32" (1/1) ... [2019-10-14 23:55:32,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:32" (1/1) ... [2019-10-14 23:55:32,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:55:32,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:55:32,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:55:32,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:55:32,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:32" (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 [2019-10-14 23:55:32,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:55:32,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:55:32,259 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:55:32,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:55:32,260 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:55:32,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:55:32,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:55:32,260 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:55:32,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:55:32,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:55:32,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:55:33,529 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:55:33,530 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:55:33,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:33 BoogieIcfgContainer [2019-10-14 23:55:33,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:55:33,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:55:33,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:55:33,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:55:33,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:55:31" (1/3) ... [2019-10-14 23:55:33,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1227bf53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:33, skipping insertion in model container [2019-10-14 23:55:33,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:32" (2/3) ... [2019-10-14 23:55:33,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1227bf53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:33, skipping insertion in model container [2019-10-14 23:55:33,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:33" (3/3) ... [2019-10-14 23:55:33,550 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label03.c [2019-10-14 23:55:33,563 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:55:33,573 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:55:33,586 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:55:33,630 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:55:33,631 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:55:33,633 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:55:33,633 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:55:33,633 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:55:33,634 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:55:33,634 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:55:33,634 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:55:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:55:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-14 23:55:33,693 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:33,694 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:33,696 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:33,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:33,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1255491721, now seen corresponding path program 1 times [2019-10-14 23:55:33,712 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:33,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306149951] [2019-10-14 23:55:33,713 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:33,713 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:33,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:34,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306149951] [2019-10-14 23:55:34,321 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:34,322 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:55:34,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129668982] [2019-10-14 23:55:34,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:55:34,330 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:34,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:55:34,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:55:34,349 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 4 states. [2019-10-14 23:55:35,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:35,700 INFO L93 Difference]: Finished difference Result 784 states and 1369 transitions. [2019-10-14 23:55:35,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:55:35,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2019-10-14 23:55:35,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:35,725 INFO L225 Difference]: With dead ends: 784 [2019-10-14 23:55:35,725 INFO L226 Difference]: Without dead ends: 472 [2019-10-14 23:55:35,732 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:55:35,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2019-10-14 23:55:35,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 321. [2019-10-14 23:55:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-10-14 23:55:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 468 transitions. [2019-10-14 23:55:35,808 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 468 transitions. Word has length 135 [2019-10-14 23:55:35,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:35,809 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 468 transitions. [2019-10-14 23:55:35,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:55:35,809 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 468 transitions. [2019-10-14 23:55:35,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-14 23:55:35,814 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:35,814 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, 1] [2019-10-14 23:55:35,815 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:35,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:35,815 INFO L82 PathProgramCache]: Analyzing trace with hash -1491134706, now seen corresponding path program 1 times [2019-10-14 23:55:35,816 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:35,816 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25995158] [2019-10-14 23:55:35,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:35,816 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:35,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:36,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25995158] [2019-10-14 23:55:36,145 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:36,145 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:55:36,145 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960333726] [2019-10-14 23:55:36,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:55:36,147 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:36,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:55:36,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:36,148 INFO L87 Difference]: Start difference. First operand 321 states and 468 transitions. Second operand 5 states. [2019-10-14 23:55:36,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:36,933 INFO L93 Difference]: Finished difference Result 723 states and 1095 transitions. [2019-10-14 23:55:36,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:55:36,933 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 143 [2019-10-14 23:55:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:36,938 INFO L225 Difference]: With dead ends: 723 [2019-10-14 23:55:36,938 INFO L226 Difference]: Without dead ends: 321 [2019-10-14 23:55:36,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:36,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2019-10-14 23:55:36,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2019-10-14 23:55:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-10-14 23:55:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 464 transitions. [2019-10-14 23:55:36,982 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 464 transitions. Word has length 143 [2019-10-14 23:55:36,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:36,983 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 464 transitions. [2019-10-14 23:55:36,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:55:36,983 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 464 transitions. [2019-10-14 23:55:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-14 23:55:36,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:36,992 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:36,992 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:36,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1623037980, now seen corresponding path program 1 times [2019-10-14 23:55:36,993 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:36,993 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290806595] [2019-10-14 23:55:36,993 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:36,993 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:36,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:37,132 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290806595] [2019-10-14 23:55:37,132 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:37,132 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:55:37,132 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617901649] [2019-10-14 23:55:37,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:55:37,133 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:37,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:55:37,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:55:37,134 INFO L87 Difference]: Start difference. First operand 321 states and 464 transitions. Second operand 6 states. [2019-10-14 23:55:38,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:38,006 INFO L93 Difference]: Finished difference Result 954 states and 1409 transitions. [2019-10-14 23:55:38,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:55:38,010 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-10-14 23:55:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:38,014 INFO L225 Difference]: With dead ends: 954 [2019-10-14 23:55:38,015 INFO L226 Difference]: Without dead ends: 639 [2019-10-14 23:55:38,016 INFO L600 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 [2019-10-14 23:55:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2019-10-14 23:55:38,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 628. [2019-10-14 23:55:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-10-14 23:55:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 886 transitions. [2019-10-14 23:55:38,046 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 886 transitions. Word has length 155 [2019-10-14 23:55:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:38,047 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 886 transitions. [2019-10-14 23:55:38,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:55:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 886 transitions. [2019-10-14 23:55:38,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-14 23:55:38,051 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:38,051 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:38,051 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:38,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:38,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1037502027, now seen corresponding path program 1 times [2019-10-14 23:55:38,052 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:38,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811586587] [2019-10-14 23:55:38,052 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:38,053 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:38,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:38,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811586587] [2019-10-14 23:55:38,338 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:38,338 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:55:38,339 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031250689] [2019-10-14 23:55:38,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:55:38,340 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:38,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:55:38,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:38,340 INFO L87 Difference]: Start difference. First operand 628 states and 886 transitions. Second operand 5 states. [2019-10-14 23:55:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:38,999 INFO L93 Difference]: Finished difference Result 1334 states and 1936 transitions. [2019-10-14 23:55:38,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:55:38,999 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2019-10-14 23:55:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:39,004 INFO L225 Difference]: With dead ends: 1334 [2019-10-14 23:55:39,004 INFO L226 Difference]: Without dead ends: 628 [2019-10-14 23:55:39,007 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:39,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2019-10-14 23:55:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2019-10-14 23:55:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-10-14 23:55:39,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 874 transitions. [2019-10-14 23:55:39,031 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 874 transitions. Word has length 159 [2019-10-14 23:55:39,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:39,031 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 874 transitions. [2019-10-14 23:55:39,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:55:39,032 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 874 transitions. [2019-10-14 23:55:39,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-14 23:55:39,035 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:39,036 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:39,036 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:39,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1950441223, now seen corresponding path program 1 times [2019-10-14 23:55:39,037 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:39,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344363418] [2019-10-14 23:55:39,037 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:39,037 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:39,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:39,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344363418] [2019-10-14 23:55:39,338 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:39,338 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:55:39,338 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585230936] [2019-10-14 23:55:39,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:55:39,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:39,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:55:39,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:39,340 INFO L87 Difference]: Start difference. First operand 628 states and 874 transitions. Second operand 5 states. [2019-10-14 23:55:40,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:40,101 INFO L93 Difference]: Finished difference Result 1336 states and 1909 transitions. [2019-10-14 23:55:40,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:55:40,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2019-10-14 23:55:40,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:40,105 INFO L225 Difference]: With dead ends: 1336 [2019-10-14 23:55:40,105 INFO L226 Difference]: Without dead ends: 628 [2019-10-14 23:55:40,107 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:40,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2019-10-14 23:55:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 628. [2019-10-14 23:55:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-10-14 23:55:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 856 transitions. [2019-10-14 23:55:40,128 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 856 transitions. Word has length 161 [2019-10-14 23:55:40,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:40,129 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 856 transitions. [2019-10-14 23:55:40,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:55:40,129 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 856 transitions. [2019-10-14 23:55:40,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-10-14 23:55:40,132 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:40,133 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:40,133 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:40,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:40,133 INFO L82 PathProgramCache]: Analyzing trace with hash -739640613, now seen corresponding path program 1 times [2019-10-14 23:55:40,134 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:40,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893659056] [2019-10-14 23:55:40,134 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:40,134 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:40,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:40,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893659056] [2019-10-14 23:55:40,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287963028] [2019-10-14 23:55:40,206 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 [2019-10-14 23:55:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:40,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:55:40,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:55:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:40,427 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:55:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:40,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [893764843] [2019-10-14 23:55:40,558 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 169 [2019-10-14 23:55:40,619 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:55:40,619 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)