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/Problem01_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:53:15,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:53:15,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:53:15,088 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:53:15,088 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:53:15,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:53:15,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:53:15,092 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:53:15,094 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:53:15,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:53:15,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:53:15,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:53:15,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:53:15,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:53:15,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:53:15,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:53:15,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:53:15,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:53:15,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:53:15,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:53:15,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:53:15,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:53:15,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:53:15,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:53:15,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:53:15,115 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:53:15,116 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:53:15,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:53:15,117 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:53:15,118 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:53:15,119 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:53:15,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:53:15,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:53:15,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:53:15,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:53:15,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:53:15,122 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:53:15,136 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:53:15,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:53:15,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:53:15,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:53:15,138 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:53:15,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:53:15,138 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:53:15,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:53:15,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:53:15,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:53:15,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:53:15,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:53:15,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:53:15,140 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:53:15,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:53:15,140 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:53:15,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:53:15,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:53:15,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:53:15,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:53:15,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:53:15,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:15,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:53:15,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:53:15,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:53:15,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:53:15,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:53:15,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:53:15,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-14 23:53:15,411 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:53:15,423 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:53:15,427 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:53:15,428 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:53:15,428 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:53:15,429 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label14.c [2019-10-14 23:53:15,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06965737f/1b3c423eef0f4ba1a695b4225768030f/FLAG9ab59dad9 [2019-10-14 23:53:16,061 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:53:16,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label14.c [2019-10-14 23:53:16,076 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06965737f/1b3c423eef0f4ba1a695b4225768030f/FLAG9ab59dad9 [2019-10-14 23:53:16,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06965737f/1b3c423eef0f4ba1a695b4225768030f [2019-10-14 23:53:16,333 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:53:16,334 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:53:16,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:16,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:53:16,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:53:16,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:16" (1/1) ... [2019-10-14 23:53:16,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@364da557 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:16, skipping insertion in model container [2019-10-14 23:53:16,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:16" (1/1) ... [2019-10-14 23:53:16,353 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:53:16,413 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:53:16,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:16,953 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:53:17,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:17,226 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:53:17,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:17 WrapperNode [2019-10-14 23:53:17,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:17,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:53:17,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:53:17,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:53:17,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:17" (1/1) ... [2019-10-14 23:53:17,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:17" (1/1) ... [2019-10-14 23:53:17,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:17" (1/1) ... [2019-10-14 23:53:17,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:17" (1/1) ... [2019-10-14 23:53:17,311 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:17" (1/1) ... [2019-10-14 23:53:17,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:17" (1/1) ... [2019-10-14 23:53:17,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:17" (1/1) ... [2019-10-14 23:53:17,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:53:17,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:53:17,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:53:17,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:53:17,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:17,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:53:17,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:53:17,435 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:53:17,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:53:17,435 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:53:17,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:53:17,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:53:17,437 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:53:17,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:53:17,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:53:17,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:53:18,716 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:53:18,716 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:53:18,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:18 BoogieIcfgContainer [2019-10-14 23:53:18,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:53:18,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:53:18,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:53:18,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:53:18,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:53:16" (1/3) ... [2019-10-14 23:53:18,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4139da84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:18, skipping insertion in model container [2019-10-14 23:53:18,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:17" (2/3) ... [2019-10-14 23:53:18,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4139da84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:18, skipping insertion in model container [2019-10-14 23:53:18,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:18" (3/3) ... [2019-10-14 23:53:18,726 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label14.c [2019-10-14 23:53:18,736 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:53:18,744 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:53:18,755 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:53:18,783 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:53:18,783 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:53:18,783 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:53:18,783 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:53:18,784 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:53:18,784 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:53:18,784 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:53:18,784 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:53:18,807 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:53:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-14 23:53:18,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:18,823 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:18,825 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:18,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:18,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2085422569, now seen corresponding path program 1 times [2019-10-14 23:53:18,839 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:18,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573612693] [2019-10-14 23:53:18,840 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:18,841 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:18,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:19,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573612693] [2019-10-14 23:53:19,398 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:19,399 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:19,399 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583970675] [2019-10-14 23:53:19,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:19,411 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:19,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:19,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:19,429 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:53:20,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:20,388 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:53:20,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:20,390 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2019-10-14 23:53:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:20,418 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:53:20,418 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:53:20,430 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:20,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:53:20,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:53:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:53:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-10-14 23:53:20,529 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 137 [2019-10-14 23:53:20,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:20,533 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-10-14 23:53:20,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-10-14 23:53:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-14 23:53:20,547 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:20,548 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:20,548 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:20,548 INFO L82 PathProgramCache]: Analyzing trace with hash -168887712, now seen corresponding path program 1 times [2019-10-14 23:53:20,549 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:20,549 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673048210] [2019-10-14 23:53:20,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:20,550 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:20,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:20,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673048210] [2019-10-14 23:53:20,685 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:20,686 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:53:20,686 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894308758] [2019-10-14 23:53:20,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:53:20,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:20,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:53:20,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:53:20,689 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-10-14 23:53:21,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:21,462 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-10-14 23:53:21,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:53:21,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2019-10-14 23:53:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:21,470 INFO L225 Difference]: With dead ends: 840 [2019-10-14 23:53:21,471 INFO L226 Difference]: Without dead ends: 568 [2019-10-14 23:53:21,472 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:53:21,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-14 23:53:21,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-10-14 23:53:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-10-14 23:53:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-10-14 23:53:21,505 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 147 [2019-10-14 23:53:21,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:21,506 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-10-14 23:53:21,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:53:21,506 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-10-14 23:53:21,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-14 23:53:21,509 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:21,509 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:21,509 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:21,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:21,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1733990238, now seen corresponding path program 1 times [2019-10-14 23:53:21,510 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:21,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952816082] [2019-10-14 23:53:21,511 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:21,511 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:21,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:21,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952816082] [2019-10-14 23:53:21,868 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:21,868 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:53:21,869 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929102062] [2019-10-14 23:53:21,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:53:21,870 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:21,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:53:21,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:53:21,870 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 5 states. [2019-10-14 23:53:22,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:22,617 INFO L93 Difference]: Finished difference Result 1205 states and 1730 transitions. [2019-10-14 23:53:22,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:53:22,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2019-10-14 23:53:22,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:22,624 INFO L225 Difference]: With dead ends: 1205 [2019-10-14 23:53:22,624 INFO L226 Difference]: Without dead ends: 554 [2019-10-14 23:53:22,626 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:53:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-14 23:53:22,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-14 23:53:22,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-14 23:53:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 712 transitions. [2019-10-14 23:53:22,659 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 712 transitions. Word has length 148 [2019-10-14 23:53:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:22,660 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 712 transitions. [2019-10-14 23:53:22,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:53:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 712 transitions. [2019-10-14 23:53:22,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-14 23:53:22,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:22,666 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:22,666 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:22,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:22,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1831387878, now seen corresponding path program 1 times [2019-10-14 23:53:22,667 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:22,668 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99205047] [2019-10-14 23:53:22,668 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:22,668 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:22,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:22,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99205047] [2019-10-14 23:53:22,839 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:22,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:22,840 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082593071] [2019-10-14 23:53:22,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:22,841 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:22,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:22,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:22,842 INFO L87 Difference]: Start difference. First operand 554 states and 712 transitions. Second operand 3 states. [2019-10-14 23:53:23,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:23,285 INFO L93 Difference]: Finished difference Result 1509 states and 1959 transitions. [2019-10-14 23:53:23,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:23,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 152 [2019-10-14 23:53:23,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:23,292 INFO L225 Difference]: With dead ends: 1509 [2019-10-14 23:53:23,293 INFO L226 Difference]: Without dead ends: 961 [2019-10-14 23:53:23,294 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 [2019-10-14 23:53:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2019-10-14 23:53:23,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 961. [2019-10-14 23:53:23,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2019-10-14 23:53:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1216 transitions. [2019-10-14 23:53:23,326 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1216 transitions. Word has length 152 [2019-10-14 23:53:23,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:23,326 INFO L462 AbstractCegarLoop]: Abstraction has 961 states and 1216 transitions. [2019-10-14 23:53:23,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1216 transitions. [2019-10-14 23:53:23,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-14 23:53:23,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:23,331 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:23,331 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:23,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1301808515, now seen corresponding path program 1 times [2019-10-14 23:53:23,332 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:23,332 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22729465] [2019-10-14 23:53:23,332 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:23,333 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:23,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:23,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22729465] [2019-10-14 23:53:23,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211660566] [2019-10-14 23:53:23,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:53:23,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:23,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:53:23,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:53:23,999 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:53:24,114 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:53:24,114 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [11] total 12 [2019-10-14 23:53:24,115 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739761417] [2019-10-14 23:53:24,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:24,116 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:24,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:24,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:53:24,116 INFO L87 Difference]: Start difference. First operand 961 states and 1216 transitions. Second operand 3 states. [2019-10-14 23:53:24,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:24,583 INFO L93 Difference]: Finished difference Result 2732 states and 3518 transitions. [2019-10-14 23:53:24,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:24,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2019-10-14 23:53:24,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:24,594 INFO L225 Difference]: With dead ends: 2732 [2019-10-14 23:53:24,594 INFO L226 Difference]: Without dead ends: 1777 [2019-10-14 23:53:24,597 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 343 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:53:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2019-10-14 23:53:24,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1777. [2019-10-14 23:53:24,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1777 states. [2019-10-14 23:53:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2236 transitions. [2019-10-14 23:53:24,652 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2236 transitions. Word has length 172 [2019-10-14 23:53:24,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:24,653 INFO L462 AbstractCegarLoop]: Abstraction has 1777 states and 2236 transitions. [2019-10-14 23:53:24,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2236 transitions. [2019-10-14 23:53:24,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-14 23:53:24,662 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:24,662 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:24,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:53:24,869 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:24,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:24,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1945054320, now seen corresponding path program 1 times [2019-10-14 23:53:24,871 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:24,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787081682] [2019-10-14 23:53:24,871 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:24,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:24,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:25,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787081682] [2019-10-14 23:53:25,072 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:25,072 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:53:25,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989516455] [2019-10-14 23:53:25,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:53:25,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:25,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:53:25,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:53:25,075 INFO L87 Difference]: Start difference. First operand 1777 states and 2236 transitions. Second operand 4 states. [2019-10-14 23:53:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:25,843 INFO L93 Difference]: Finished difference Result 4493 states and 5777 transitions. [2019-10-14 23:53:25,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:53:25,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2019-10-14 23:53:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:25,858 INFO L225 Difference]: With dead ends: 4493 [2019-10-14 23:53:25,858 INFO L226 Difference]: Without dead ends: 2722 [2019-10-14 23:53:25,863 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 [2019-10-14 23:53:25,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2722 states. [2019-10-14 23:53:25,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2722 to 2722. [2019-10-14 23:53:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2722 states. [2019-10-14 23:53:25,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 3393 transitions. [2019-10-14 23:53:25,961 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 3393 transitions. Word has length 171 [2019-10-14 23:53:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:25,961 INFO L462 AbstractCegarLoop]: Abstraction has 2722 states and 3393 transitions. [2019-10-14 23:53:25,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:53:25,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 3393 transitions. [2019-10-14 23:53:25,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-14 23:53:25,971 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:25,971 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:25,971 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:25,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:25,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1760332118, now seen corresponding path program 1 times [2019-10-14 23:53:25,972 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:25,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667907320] [2019-10-14 23:53:25,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:25,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:25,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 71 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-14 23:53:26,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667907320] [2019-10-14 23:53:26,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528143736] [2019-10-14 23:53:26,083 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 [2019-10-14 23:53:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:26,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:53:26,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 62 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:53:26,273 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:53:26,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [517964034] [2019-10-14 23:53:26,436 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 201 [2019-10-14 23:53:26,491 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:53:26,492 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)