java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:56:00,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:56:00,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:56:00,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:56:00,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:56:00,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:56:00,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:56:00,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:56:00,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:56:00,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:56:00,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:56:00,675 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:56:00,675 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:56:00,677 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:56:00,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:56:00,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:56:00,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:56:00,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:56:00,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:56:00,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:56:00,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:56:00,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:56:00,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:56:00,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:56:00,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:56:00,705 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:56:00,706 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:56:00,707 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:56:00,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:56:00,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:56:00,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:56:00,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:56:00,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:56:00,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:56:00,710 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:56:00,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:56:00,712 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 23:56:00,726 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:56:00,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:56:00,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:56:00,727 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:56:00,728 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:56:00,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:56:00,728 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:56:00,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:56:00,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:56:00,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:56:00,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:56:00,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:56:00,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:56:00,729 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:56:00,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:56:00,730 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:56:00,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:56:00,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:56:00,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:56:00,731 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:56:00,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:56:00,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:56:00,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:56:00,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:56:00,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:56:00,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:56:00,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:56:00,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:56:00,733 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 23:56:01,031 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:56:01,052 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:56:01,056 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:56:01,057 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:56:01,058 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:56:01,059 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label14.c [2019-10-14 23:56:01,135 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d071bee1e/7cd2af2ffa9745a4b69789f57987c2f8/FLAG5d428998b [2019-10-14 23:56:01,749 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:56:01,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label14.c [2019-10-14 23:56:01,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d071bee1e/7cd2af2ffa9745a4b69789f57987c2f8/FLAG5d428998b [2019-10-14 23:56:01,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d071bee1e/7cd2af2ffa9745a4b69789f57987c2f8 [2019-10-14 23:56:02,009 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:56:02,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:56:02,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:02,015 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:56:02,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:56:02,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:01" (1/1) ... [2019-10-14 23:56:02,022 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b20f996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:02, skipping insertion in model container [2019-10-14 23:56:02,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:01" (1/1) ... [2019-10-14 23:56:02,031 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:56:02,096 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:56:02,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:02,666 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:56:02,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:02,807 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:56:02,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:02 WrapperNode [2019-10-14 23:56:02,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:02,809 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:56:02,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:56:02,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:56:02,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:02" (1/1) ... [2019-10-14 23:56:02,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:02" (1/1) ... [2019-10-14 23:56:02,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:02" (1/1) ... [2019-10-14 23:56:02,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:02" (1/1) ... [2019-10-14 23:56:02,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:02" (1/1) ... [2019-10-14 23:56:02,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:02" (1/1) ... [2019-10-14 23:56:02,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:02" (1/1) ... [2019-10-14 23:56:02,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:56:02,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:56:02,919 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:56:02,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:56:02,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:02" (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 23:56:02,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:56:02,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:56:02,996 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:56:02,996 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:56:02,997 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:56:02,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:56:02,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:56:02,997 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:56:02,997 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:56:02,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:56:02,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:56:04,246 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:56:04,246 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:56:04,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:04 BoogieIcfgContainer [2019-10-14 23:56:04,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:56:04,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:56:04,249 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:56:04,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:56:04,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:56:01" (1/3) ... [2019-10-14 23:56:04,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b532e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:04, skipping insertion in model container [2019-10-14 23:56:04,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:02" (2/3) ... [2019-10-14 23:56:04,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b532e5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:04, skipping insertion in model container [2019-10-14 23:56:04,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:04" (3/3) ... [2019-10-14 23:56:04,257 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label14.c [2019-10-14 23:56:04,267 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:56:04,277 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:56:04,289 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:56:04,324 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:56:04,325 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:56:04,326 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:56:04,326 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:56:04,327 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:56:04,327 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:56:04,327 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:56:04,327 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:56:04,360 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:56:04,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-14 23:56:04,382 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:04,383 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] [2019-10-14 23:56:04,385 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:04,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:04,391 INFO L82 PathProgramCache]: Analyzing trace with hash -871643495, now seen corresponding path program 1 times [2019-10-14 23:56:04,401 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:04,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877100956] [2019-10-14 23:56:04,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:04,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:04,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:04,893 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 23:56:04,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877100956] [2019-10-14 23:56:04,895 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:04,895 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:56:04,896 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547877538] [2019-10-14 23:56:04,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:04,905 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:04,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:04,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:04,923 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:56:05,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:05,937 INFO L93 Difference]: Finished difference Result 618 states and 1056 transitions. [2019-10-14 23:56:05,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:05,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2019-10-14 23:56:05,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:05,969 INFO L225 Difference]: With dead ends: 618 [2019-10-14 23:56:05,969 INFO L226 Difference]: Without dead ends: 320 [2019-10-14 23:56:05,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 23:56:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-14 23:56:06,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-10-14 23:56:06,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-14 23:56:06,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-10-14 23:56:06,058 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 123 [2019-10-14 23:56:06,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:06,060 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-10-14 23:56:06,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:06,061 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-10-14 23:56:06,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-14 23:56:06,068 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:06,070 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:06,070 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:06,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:06,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1344572258, now seen corresponding path program 1 times [2019-10-14 23:56:06,071 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:06,071 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641468380] [2019-10-14 23:56:06,072 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:06,072 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:06,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:06,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641468380] [2019-10-14 23:56:06,379 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:06,379 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:56:06,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005913726] [2019-10-14 23:56:06,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:56:06,381 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:06,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:56:06,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:56:06,382 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 5 states. [2019-10-14 23:56:07,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:07,150 INFO L93 Difference]: Finished difference Result 721 states and 1089 transitions. [2019-10-14 23:56:07,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:56:07,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2019-10-14 23:56:07,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:07,158 INFO L225 Difference]: With dead ends: 721 [2019-10-14 23:56:07,159 INFO L226 Difference]: Without dead ends: 320 [2019-10-14 23:56:07,160 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:56:07,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-14 23:56:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-10-14 23:56:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-14 23:56:07,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 461 transitions. [2019-10-14 23:56:07,186 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 461 transitions. Word has length 131 [2019-10-14 23:56:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:07,187 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 461 transitions. [2019-10-14 23:56:07,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:56:07,187 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 461 transitions. [2019-10-14 23:56:07,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-14 23:56:07,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:07,190 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:07,191 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:07,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:07,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1612994454, now seen corresponding path program 1 times [2019-10-14 23:56:07,192 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:07,192 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534613906] [2019-10-14 23:56:07,192 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:07,192 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:07,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:07,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534613906] [2019-10-14 23:56:07,519 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:07,519 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:56:07,519 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313253970] [2019-10-14 23:56:07,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:56:07,520 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:07,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:56:07,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:56:07,521 INFO L87 Difference]: Start difference. First operand 320 states and 461 transitions. Second operand 5 states. [2019-10-14 23:56:08,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:08,329 INFO L93 Difference]: Finished difference Result 717 states and 1075 transitions. [2019-10-14 23:56:08,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:56:08,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2019-10-14 23:56:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:08,334 INFO L225 Difference]: With dead ends: 717 [2019-10-14 23:56:08,334 INFO L226 Difference]: Without dead ends: 320 [2019-10-14 23:56:08,335 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 23:56:08,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-14 23:56:08,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-10-14 23:56:08,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-14 23:56:08,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 455 transitions. [2019-10-14 23:56:08,356 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 455 transitions. Word has length 137 [2019-10-14 23:56:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:08,357 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 455 transitions. [2019-10-14 23:56:08,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:56:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 455 transitions. [2019-10-14 23:56:08,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-14 23:56:08,360 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:08,360 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:56:08,360 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:08,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:08,361 INFO L82 PathProgramCache]: Analyzing trace with hash -295293823, now seen corresponding path program 1 times [2019-10-14 23:56:08,361 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:08,361 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26871305] [2019-10-14 23:56:08,362 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:08,362 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:08,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:08,441 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:08,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26871305] [2019-10-14 23:56:08,442 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:08,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:56:08,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450492237] [2019-10-14 23:56:08,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:56:08,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:08,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:56:08,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:56:08,444 INFO L87 Difference]: Start difference. First operand 320 states and 455 transitions. Second operand 6 states. [2019-10-14 23:56:09,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:09,322 INFO L93 Difference]: Finished difference Result 951 states and 1383 transitions. [2019-10-14 23:56:09,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:56:09,322 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-10-14 23:56:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:09,326 INFO L225 Difference]: With dead ends: 951 [2019-10-14 23:56:09,327 INFO L226 Difference]: Without dead ends: 637 [2019-10-14 23:56:09,328 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 23:56:09,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2019-10-14 23:56:09,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 626. [2019-10-14 23:56:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-14 23:56:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 871 transitions. [2019-10-14 23:56:09,371 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 871 transitions. Word has length 145 [2019-10-14 23:56:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:09,372 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 871 transitions. [2019-10-14 23:56:09,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:56:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 871 transitions. [2019-10-14 23:56:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-14 23:56:09,377 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:09,378 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:09,378 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:09,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1344349755, now seen corresponding path program 1 times [2019-10-14 23:56:09,379 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:09,379 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922455130] [2019-10-14 23:56:09,380 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:09,380 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:09,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:09,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922455130] [2019-10-14 23:56:09,674 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:09,675 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:56:09,675 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874773635] [2019-10-14 23:56:09,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:56:09,676 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:09,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:56:09,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:56:09,678 INFO L87 Difference]: Start difference. First operand 626 states and 871 transitions. Second operand 5 states. [2019-10-14 23:56:10,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:10,411 INFO L93 Difference]: Finished difference Result 1330 states and 1903 transitions. [2019-10-14 23:56:10,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:56:10,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-10-14 23:56:10,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:10,420 INFO L225 Difference]: With dead ends: 1330 [2019-10-14 23:56:10,420 INFO L226 Difference]: Without dead ends: 626 [2019-10-14 23:56:10,423 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 23:56:10,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-14 23:56:10,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-14 23:56:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-14 23:56:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 859 transitions. [2019-10-14 23:56:10,453 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 859 transitions. Word has length 147 [2019-10-14 23:56:10,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:10,454 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 859 transitions. [2019-10-14 23:56:10,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:56:10,454 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 859 transitions. [2019-10-14 23:56:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-14 23:56:10,457 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:10,458 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:10,458 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:10,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:10,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2124265719, now seen corresponding path program 1 times [2019-10-14 23:56:10,459 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:10,459 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444085376] [2019-10-14 23:56:10,459 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:10,460 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:10,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:10,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444085376] [2019-10-14 23:56:10,701 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:10,701 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:56:10,701 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964567787] [2019-10-14 23:56:10,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:56:10,702 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:10,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:56:10,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:56:10,703 INFO L87 Difference]: Start difference. First operand 626 states and 859 transitions. Second operand 5 states. [2019-10-14 23:56:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:11,347 INFO L93 Difference]: Finished difference Result 1332 states and 1878 transitions. [2019-10-14 23:56:11,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:56:11,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2019-10-14 23:56:11,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:11,351 INFO L225 Difference]: With dead ends: 1332 [2019-10-14 23:56:11,351 INFO L226 Difference]: Without dead ends: 626 [2019-10-14 23:56:11,353 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 23:56:11,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-14 23:56:11,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2019-10-14 23:56:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-14 23:56:11,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 843 transitions. [2019-10-14 23:56:11,373 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 843 transitions. Word has length 149 [2019-10-14 23:56:11,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:11,374 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 843 transitions. [2019-10-14 23:56:11,374 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:56:11,374 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 843 transitions. [2019-10-14 23:56:11,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-14 23:56:11,378 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:11,378 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:11,378 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:11,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:11,379 INFO L82 PathProgramCache]: Analyzing trace with hash 566845841, now seen corresponding path program 1 times [2019-10-14 23:56:11,379 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:11,379 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752735962] [2019-10-14 23:56:11,380 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:11,380 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:11,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:11,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:11,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752735962] [2019-10-14 23:56:11,513 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:11,513 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:56:11,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577682690] [2019-10-14 23:56:11,515 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:56:11,515 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:11,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:56:11,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:56:11,516 INFO L87 Difference]: Start difference. First operand 626 states and 843 transitions. Second operand 6 states. [2019-10-14 23:56:12,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:12,334 INFO L93 Difference]: Finished difference Result 1858 states and 2601 transitions. [2019-10-14 23:56:12,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:56:12,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2019-10-14 23:56:12,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:12,342 INFO L225 Difference]: With dead ends: 1858 [2019-10-14 23:56:12,343 INFO L226 Difference]: Without dead ends: 1238 [2019-10-14 23:56:12,345 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 23:56:12,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2019-10-14 23:56:12,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1218. [2019-10-14 23:56:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1218 states. [2019-10-14 23:56:12,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1635 transitions. [2019-10-14 23:56:12,386 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1635 transitions. Word has length 153 [2019-10-14 23:56:12,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:12,386 INFO L462 AbstractCegarLoop]: Abstraction has 1218 states and 1635 transitions. [2019-10-14 23:56:12,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:56:12,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1635 transitions. [2019-10-14 23:56:12,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-14 23:56:12,392 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:12,392 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, 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] [2019-10-14 23:56:12,392 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:12,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:12,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1114474735, now seen corresponding path program 1 times [2019-10-14 23:56:12,393 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:12,393 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025911870] [2019-10-14 23:56:12,393 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:12,394 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:12,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:12,546 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:12,547 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025911870] [2019-10-14 23:56:12,547 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72574855] [2019-10-14 23:56:12,547 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 23:56:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:12,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:56:12,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:12,767 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:12,896 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [137707189] [2019-10-14 23:56:12,907 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 188 [2019-10-14 23:56:12,989 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:56:12,989 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)