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_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:07:08,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:07:08,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:07:08,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:07:08,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:07:08,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:07:08,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:07:08,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:07:08,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:07:08,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:07:08,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:07:08,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:07:08,374 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:07:08,376 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:07:08,378 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:07:08,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:07:08,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:07:08,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:07:08,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:07:08,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:07:08,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:07:08,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:07:08,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:07:08,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:07:08,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:07:08,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:07:08,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:07:08,402 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:07:08,403 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:07:08,404 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:07:08,405 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:07:08,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:07:08,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:07:08,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:07:08,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:07:08,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:07:08,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:07:08,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:07:08,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:07:08,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:07:08,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:07:08,413 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 20:07:08,445 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:07:08,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:07:08,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:07:08,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:07:08,451 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:07:08,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:07:08,452 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:07:08,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:07:08,452 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:07:08,452 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:07:08,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:07:08,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:07:08,453 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:07:08,453 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:07:08,453 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:07:08,454 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:07:08,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:07:08,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:07:08,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:07:08,455 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:07:08,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:07:08,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:08,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:07:08,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:07:08,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:07:08,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:07:08,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:07:08,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:07:08,457 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 20:07:08,748 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:07:08,770 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:07:08,773 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:07:08,775 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:07:08,775 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:07:08,776 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label29.c [2019-10-13 20:07:08,844 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fec4310fb/223841216b8142f28838b94653807833/FLAG4bac6b735 [2019-10-13 20:07:09,458 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:07:09,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label29.c [2019-10-13 20:07:09,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fec4310fb/223841216b8142f28838b94653807833/FLAG4bac6b735 [2019-10-13 20:07:09,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fec4310fb/223841216b8142f28838b94653807833 [2019-10-13 20:07:09,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:07:09,749 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:07:09,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:09,751 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:07:09,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:07:09,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:09" (1/1) ... [2019-10-13 20:07:09,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69ecaa57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:09, skipping insertion in model container [2019-10-13 20:07:09,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:09" (1/1) ... [2019-10-13 20:07:09,767 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:07:09,827 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:07:10,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:10,431 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:07:10,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:10,586 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:07:10,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:10 WrapperNode [2019-10-13 20:07:10,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:10,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:07:10,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:07:10,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:07:10,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:10" (1/1) ... [2019-10-13 20:07:10,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:10" (1/1) ... [2019-10-13 20:07:10,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:10" (1/1) ... [2019-10-13 20:07:10,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:10" (1/1) ... [2019-10-13 20:07:10,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:10" (1/1) ... [2019-10-13 20:07:10,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:10" (1/1) ... [2019-10-13 20:07:10,702 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:10" (1/1) ... [2019-10-13 20:07:10,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:07:10,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:07:10,721 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:07:10,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:07:10,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:10" (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 20:07:10,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:07:10,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:07:10,794 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:07:10,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:07:10,795 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:07:10,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:07:10,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:07:10,795 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:07:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:07:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:07:10,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:07:12,308 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:07:12,312 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:07:12,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:12 BoogieIcfgContainer [2019-10-13 20:07:12,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:07:12,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:07:12,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:07:12,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:07:12,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:07:09" (1/3) ... [2019-10-13 20:07:12,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d206744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:12, skipping insertion in model container [2019-10-13 20:07:12,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:10" (2/3) ... [2019-10-13 20:07:12,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d206744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:12, skipping insertion in model container [2019-10-13 20:07:12,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:12" (3/3) ... [2019-10-13 20:07:12,321 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label29.c [2019-10-13 20:07:12,333 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:07:12,343 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:07:12,354 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:07:12,398 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:07:12,398 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:07:12,398 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:07:12,398 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:07:12,399 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:07:12,399 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:07:12,399 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:07:12,399 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:07:12,434 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:07:12,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 20:07:12,444 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:12,445 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] [2019-10-13 20:07:12,448 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:12,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1085195851, now seen corresponding path program 1 times [2019-10-13 20:07:12,467 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:12,467 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015376688] [2019-10-13 20:07:12,468 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:12,468 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:12,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:12,832 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 20:07:12,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015376688] [2019-10-13 20:07:12,835 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:12,835 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:12,836 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535606296] [2019-10-13 20:07:12,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:12,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:12,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:12,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:12,864 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-13 20:07:14,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:14,870 INFO L93 Difference]: Finished difference Result 890 states and 1607 transitions. [2019-10-13 20:07:14,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:14,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-13 20:07:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:14,897 INFO L225 Difference]: With dead ends: 890 [2019-10-13 20:07:14,897 INFO L226 Difference]: Without dead ends: 554 [2019-10-13 20:07:14,906 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:14,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-13 20:07:15,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-13 20:07:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-13 20:07:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 776 transitions. [2019-10-13 20:07:15,035 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 776 transitions. Word has length 22 [2019-10-13 20:07:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:15,036 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 776 transitions. [2019-10-13 20:07:15,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:15,037 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 776 transitions. [2019-10-13 20:07:15,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 20:07:15,047 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:15,048 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] [2019-10-13 20:07:15,048 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:15,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:15,050 INFO L82 PathProgramCache]: Analyzing trace with hash 503601434, now seen corresponding path program 1 times [2019-10-13 20:07:15,051 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:15,051 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21109494] [2019-10-13 20:07:15,051 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:15,051 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:15,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:15,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21109494] [2019-10-13 20:07:15,357 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:15,358 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:15,358 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461913425] [2019-10-13 20:07:15,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:15,364 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:15,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:15,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:15,365 INFO L87 Difference]: Start difference. First operand 554 states and 776 transitions. Second operand 4 states. [2019-10-13 20:07:16,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:16,983 INFO L93 Difference]: Finished difference Result 2012 states and 2904 transitions. [2019-10-13 20:07:16,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:16,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2019-10-13 20:07:16,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:16,995 INFO L225 Difference]: With dead ends: 2012 [2019-10-13 20:07:16,995 INFO L226 Difference]: Without dead ends: 1464 [2019-10-13 20:07:16,998 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2019-10-13 20:07:17,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1282. [2019-10-13 20:07:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2019-10-13 20:07:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1767 transitions. [2019-10-13 20:07:17,057 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1767 transitions. Word has length 134 [2019-10-13 20:07:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:17,058 INFO L462 AbstractCegarLoop]: Abstraction has 1282 states and 1767 transitions. [2019-10-13 20:07:17,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:17,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1767 transitions. [2019-10-13 20:07:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-10-13 20:07:17,067 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:17,067 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:07:17,067 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:17,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:17,068 INFO L82 PathProgramCache]: Analyzing trace with hash -906411563, now seen corresponding path program 1 times [2019-10-13 20:07:17,069 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:17,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221945138] [2019-10-13 20:07:17,069 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:17,069 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:17,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:17,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:17,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221945138] [2019-10-13 20:07:17,764 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175033365] [2019-10-13 20:07:17,765 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 20:07:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:17,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:07:17,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:18,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 20:07:18,145 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:18,341 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:18,344 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:18,348 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:18,349 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:18,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:18,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 30 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:18,763 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:07:18,764 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 5] total 14 [2019-10-13 20:07:18,764 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561443555] [2019-10-13 20:07:18,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:07:18,765 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:18,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:07:18,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:07:18,766 INFO L87 Difference]: Start difference. First operand 1282 states and 1767 transitions. Second operand 5 states. [2019-10-13 20:07:20,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:20,113 INFO L93 Difference]: Finished difference Result 2958 states and 4059 transitions. [2019-10-13 20:07:20,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:07:20,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 208 [2019-10-13 20:07:20,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:20,127 INFO L225 Difference]: With dead ends: 2958 [2019-10-13 20:07:20,128 INFO L226 Difference]: Without dead ends: 1682 [2019-10-13 20:07:20,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 411 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-10-13 20:07:20,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2019-10-13 20:07:20,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1672. [2019-10-13 20:07:20,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1672 states. [2019-10-13 20:07:20,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 2238 transitions. [2019-10-13 20:07:20,228 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 2238 transitions. Word has length 208 [2019-10-13 20:07:20,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:20,229 INFO L462 AbstractCegarLoop]: Abstraction has 1672 states and 2238 transitions. [2019-10-13 20:07:20,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:07:20,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 2238 transitions. [2019-10-13 20:07:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-10-13 20:07:20,238 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:20,238 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 20:07:20,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:20,443 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:20,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:20,443 INFO L82 PathProgramCache]: Analyzing trace with hash -616807464, now seen corresponding path program 1 times [2019-10-13 20:07:20,444 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:20,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179424977] [2019-10-13 20:07:20,444 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:20,444 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:20,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-13 20:07:20,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179424977] [2019-10-13 20:07:20,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141098933] [2019-10-13 20:07:20,705 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 20:07:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:20,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:07:20,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:20,935 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-13 20:07:20,935 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-13 20:07:21,098 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:07:21,098 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-10-13 20:07:21,098 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259221665] [2019-10-13 20:07:21,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:07:21,100 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:21,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:07:21,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:07:21,101 INFO L87 Difference]: Start difference. First operand 1672 states and 2238 transitions. Second operand 5 states. [2019-10-13 20:07:22,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:22,192 INFO L93 Difference]: Finished difference Result 3008 states and 4166 transitions. [2019-10-13 20:07:22,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:07:22,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 278 [2019-10-13 20:07:22,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:22,206 INFO L225 Difference]: With dead ends: 3008 [2019-10-13 20:07:22,206 INFO L226 Difference]: Without dead ends: 1342 [2019-10-13 20:07:22,213 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 550 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:07:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2019-10-13 20:07:22,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 1318. [2019-10-13 20:07:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1318 states. [2019-10-13 20:07:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 1669 transitions. [2019-10-13 20:07:22,270 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 1669 transitions. Word has length 278 [2019-10-13 20:07:22,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:22,271 INFO L462 AbstractCegarLoop]: Abstraction has 1318 states and 1669 transitions. [2019-10-13 20:07:22,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:07:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 1669 transitions. [2019-10-13 20:07:22,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-10-13 20:07:22,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:22,278 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 20:07:22,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:22,491 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:22,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:22,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1461451740, now seen corresponding path program 1 times [2019-10-13 20:07:22,492 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:22,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679882826] [2019-10-13 20:07:22,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:22,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:22,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:23,192 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 131 proven. 142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:23,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679882826] [2019-10-13 20:07:23,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124495229] [2019-10-13 20:07:23,193 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 20:07:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:23,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:07:23,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:23,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 208 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 20:07:23,640 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:23,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 53 proven. 220 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:24,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1791351556] [2019-10-13 20:07:24,212 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 293 [2019-10-13 20:07:24,291 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:07:24,292 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:07:37,841 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:07:37,843 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 20:07:37,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:37,847 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:07:42,603 INFO L227 lantSequenceWeakener]: Weakened 289 states. On average, predicates are now at 77.35% of their original sizes. [2019-10-13 20:07:42,604 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:07:42,687 INFO L553 sIntCurrentIteration]: We unified 291 AI predicates to 291 [2019-10-13 20:07:42,688 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:07:42,689 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:07:42,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 8, 8] total 29 [2019-10-13 20:07:42,689 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667408395] [2019-10-13 20:07:42,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 20:07:42,691 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:42,691 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:07:42,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 20:07:42,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:07:42,692 INFO L87 Difference]: Start difference. First operand 1318 states and 1669 transitions. Second operand 11 states.