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/Problem16_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:09:45,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:09:45,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:09:45,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:09:45,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:09:45,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:09:45,300 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:09:45,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:09:45,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:09:45,318 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:09:45,319 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:09:45,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:09:45,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:09:45,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:09:45,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:09:45,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:09:45,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:09:45,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:09:45,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:09:45,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:09:45,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:09:45,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:09:45,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:09:45,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:09:45,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:09:45,355 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:09:45,357 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:09:45,358 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:09:45,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:09:45,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:09:45,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:09:45,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:09:45,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:09:45,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:09:45,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:09:45,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:09:45,363 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 20:09:45,377 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:09:45,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:09:45,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:09:45,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:09:45,379 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:09:45,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:09:45,379 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:09:45,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:09:45,379 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:09:45,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:09:45,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:09:45,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:09:45,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:09:45,380 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:09:45,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:09:45,381 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:09:45,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:09:45,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:09:45,381 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:09:45,382 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:09:45,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:09:45,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:09:45,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:09:45,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:09:45,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:09:45,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:09:45,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:09:45,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:09:45,383 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 20:09:45,668 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:09:45,683 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:09:45,686 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:09:45,688 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:09:45,688 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:09:45,689 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label28.c [2019-10-13 20:09:45,755 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7eca6dbcc/faf2ea3196da4ecf8d7f7c8e3dbe7326/FLAGff88ddfa7 [2019-10-13 20:09:46,445 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:09:46,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label28.c [2019-10-13 20:09:46,468 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7eca6dbcc/faf2ea3196da4ecf8d7f7c8e3dbe7326/FLAGff88ddfa7 [2019-10-13 20:09:46,651 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7eca6dbcc/faf2ea3196da4ecf8d7f7c8e3dbe7326 [2019-10-13 20:09:46,660 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:09:46,662 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:09:46,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:46,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:09:46,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:09:46,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:46" (1/1) ... [2019-10-13 20:09:46,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4924bc61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:46, skipping insertion in model container [2019-10-13 20:09:46,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:46" (1/1) ... [2019-10-13 20:09:46,678 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:09:46,758 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:09:47,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:47,618 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:09:47,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:48,012 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:09:48,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:48 WrapperNode [2019-10-13 20:09:48,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:48,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:09:48,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:09:48,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:09:48,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:48" (1/1) ... [2019-10-13 20:09:48,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:48" (1/1) ... [2019-10-13 20:09:48,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:48" (1/1) ... [2019-10-13 20:09:48,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:48" (1/1) ... [2019-10-13 20:09:48,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:48" (1/1) ... [2019-10-13 20:09:48,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:48" (1/1) ... [2019-10-13 20:09:48,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:48" (1/1) ... [2019-10-13 20:09:48,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:09:48,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:09:48,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:09:48,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:09:48,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:48" (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 20:09:48,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:09:48,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:09:48,287 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:09:48,287 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:09:48,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:09:48,288 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:09:48,289 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:09:48,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:09:48,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:09:48,290 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:09:48,291 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:09:48,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:09:48,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:09:50,779 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:09:50,780 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:09:50,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:50 BoogieIcfgContainer [2019-10-13 20:09:50,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:09:50,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:09:50,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:09:50,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:09:50,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:09:46" (1/3) ... [2019-10-13 20:09:50,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70405ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:50, skipping insertion in model container [2019-10-13 20:09:50,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:48" (2/3) ... [2019-10-13 20:09:50,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70405ea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:50, skipping insertion in model container [2019-10-13 20:09:50,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:50" (3/3) ... [2019-10-13 20:09:50,791 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label28.c [2019-10-13 20:09:50,801 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:09:50,810 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:09:50,822 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:09:50,853 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:09:50,854 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:09:50,854 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:09:50,854 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:09:50,854 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:09:50,854 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:09:50,855 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:09:50,855 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:09:50,884 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 20:09:50,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 20:09:50,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:50,895 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] [2019-10-13 20:09:50,897 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:50,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:50,904 INFO L82 PathProgramCache]: Analyzing trace with hash 259572933, now seen corresponding path program 1 times [2019-10-13 20:09:50,914 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:50,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509441989] [2019-10-13 20:09:50,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:50,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:50,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:51,245 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 20:09:51,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509441989] [2019-10-13 20:09:51,247 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:51,248 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:09:51,248 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905980480] [2019-10-13 20:09:51,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:09:51,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:51,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:09:51,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:09:51,274 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-13 20:09:53,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:53,606 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-13 20:09:53,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:09:53,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2019-10-13 20:09:53,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:53,636 INFO L225 Difference]: With dead ends: 1153 [2019-10-13 20:09:53,636 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 20:09:53,646 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:09:53,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 20:09:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 20:09:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 20:09:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1166 transitions. [2019-10-13 20:09:53,771 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1166 transitions. Word has length 72 [2019-10-13 20:09:53,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:53,773 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1166 transitions. [2019-10-13 20:09:53,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:09:53,773 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1166 transitions. [2019-10-13 20:09:53,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 20:09:53,791 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:53,792 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:09:53,792 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:53,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:53,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1254837677, now seen corresponding path program 1 times [2019-10-13 20:09:53,794 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:53,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693045803] [2019-10-13 20:09:53,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:53,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:53,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:54,195 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693045803] [2019-10-13 20:09:54,196 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:54,196 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:54,196 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817769502] [2019-10-13 20:09:54,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:54,199 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:54,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:54,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:54,199 INFO L87 Difference]: Start difference. First operand 682 states and 1166 transitions. Second operand 6 states. [2019-10-13 20:09:57,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:57,410 INFO L93 Difference]: Finished difference Result 1733 states and 2953 transitions. [2019-10-13 20:09:57,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:57,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 179 [2019-10-13 20:09:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:57,420 INFO L225 Difference]: With dead ends: 1733 [2019-10-13 20:09:57,421 INFO L226 Difference]: Without dead ends: 1057 [2019-10-13 20:09:57,423 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:09:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-10-13 20:09:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1039. [2019-10-13 20:09:57,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-10-13 20:09:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1701 transitions. [2019-10-13 20:09:57,478 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1701 transitions. Word has length 179 [2019-10-13 20:09:57,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:57,481 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1701 transitions. [2019-10-13 20:09:57,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1701 transitions. [2019-10-13 20:09:57,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 20:09:57,486 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:57,487 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:09:57,487 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:57,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:57,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1819152172, now seen corresponding path program 1 times [2019-10-13 20:09:57,489 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:57,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550898233] [2019-10-13 20:09:57,490 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:57,490 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:57,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:57,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550898233] [2019-10-13 20:09:57,748 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:57,749 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:57,749 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019192702] [2019-10-13 20:09:57,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:57,750 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:57,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:57,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:57,750 INFO L87 Difference]: Start difference. First operand 1039 states and 1701 transitions. Second operand 6 states. [2019-10-13 20:10:00,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:00,321 INFO L93 Difference]: Finished difference Result 3130 states and 5158 transitions. [2019-10-13 20:10:00,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:00,323 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 182 [2019-10-13 20:10:00,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:00,338 INFO L225 Difference]: With dead ends: 3130 [2019-10-13 20:10:00,338 INFO L226 Difference]: Without dead ends: 2097 [2019-10-13 20:10:00,342 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:10:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2019-10-13 20:10:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 2081. [2019-10-13 20:10:00,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-10-13 20:10:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3125 transitions. [2019-10-13 20:10:00,404 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3125 transitions. Word has length 182 [2019-10-13 20:10:00,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:00,405 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3125 transitions. [2019-10-13 20:10:00,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:10:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3125 transitions. [2019-10-13 20:10:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2019-10-13 20:10:00,410 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:00,411 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:10:00,411 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:00,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:00,412 INFO L82 PathProgramCache]: Analyzing trace with hash 244891436, now seen corresponding path program 1 times [2019-10-13 20:10:00,412 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:00,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674939295] [2019-10-13 20:10:00,412 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:00,412 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:00,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:00,705 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 130 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:10:00,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674939295] [2019-10-13 20:10:00,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691539406] [2019-10-13 20:10:00,707 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 20:10:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:00,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:10:00,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-13 20:10:01,054 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:10:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 130 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:10:01,363 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:10:01,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:10:01,364 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724331217] [2019-10-13 20:10:01,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:10:01,365 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:01,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:10:01,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:10:01,367 INFO L87 Difference]: Start difference. First operand 2081 states and 3125 transitions. Second operand 5 states. [2019-10-13 20:10:04,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:04,468 INFO L93 Difference]: Finished difference Result 6247 states and 9508 transitions. [2019-10-13 20:10:04,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:04,472 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 297 [2019-10-13 20:10:04,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:04,502 INFO L225 Difference]: With dead ends: 6247 [2019-10-13 20:10:04,502 INFO L226 Difference]: Without dead ends: 4172 [2019-10-13 20:10:04,509 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 589 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:10:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2019-10-13 20:10:04,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3821. [2019-10-13 20:10:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3821 states. [2019-10-13 20:10:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 5206 transitions. [2019-10-13 20:10:04,646 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 5206 transitions. Word has length 297 [2019-10-13 20:10:04,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:04,646 INFO L462 AbstractCegarLoop]: Abstraction has 3821 states and 5206 transitions. [2019-10-13 20:10:04,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:10:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 5206 transitions. [2019-10-13 20:10:04,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2019-10-13 20:10:04,661 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:04,661 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-10-13 20:10:04,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:04,870 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:04,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:04,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1124260879, now seen corresponding path program 1 times [2019-10-13 20:10:04,874 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:04,874 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600184157] [2019-10-13 20:10:04,875 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:04,875 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:04,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 200 proven. 240 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 20:10:05,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600184157] [2019-10-13 20:10:05,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629319416] [2019-10-13 20:10:05,737 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 20:10:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:05,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:10:05,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 442 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-13 20:10:06,412 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:10:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 297 proven. 115 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-13 20:10:06,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1062719996] [2019-10-13 20:10:06,691 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 506 [2019-10-13 20:10:06,752 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:10:06,752 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:10:21,771 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:10:21,773 INFO L272 AbstractInterpreter]: Visited 224 different actions 224 times. Never merged. Never widened. Performed 422 root evaluator evaluations with a maximum evaluation depth of 14. Performed 422 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-13 20:10:21,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:21,777 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates