java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:07:02,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:07:02,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:07:02,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:07:02,158 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:07:02,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:07:02,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:07:02,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:07:02,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:07:02,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:07:02,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:07:02,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:07:02,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:07:02,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:07:02,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:07:02,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:07:02,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:07:02,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:07:02,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:07:02,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:07:02,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:07:02,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:07:02,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:07:02,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:07:02,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:07:02,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:07:02,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:07:02,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:07:02,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:07:02,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:07:02,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:07:02,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:07:02,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:07:02,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:07:02,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:07:02,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:07:02,219 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 [2019-10-15 00:07:02,241 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:07:02,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:07:02,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:07:02,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:07:02,243 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:07:02,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:07:02,244 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:07:02,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:07:02,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:07:02,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:07:02,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:07:02,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:07:02,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:07:02,246 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:07:02,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:07:02,247 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:07:02,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:07:02,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:07:02,248 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:07:02,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:07:02,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:07:02,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:02,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:07:02,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:07:02,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:07:02,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:07:02,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:07:02,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:07:02,250 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 [2019-10-15 00:07:02,533 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:07:02,547 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:07:02,550 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:07:02,552 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:07:02,552 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:07:02,553 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label58.c [2019-10-15 00:07:02,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7474e5feb/adb511d1387942ee80e6fe1475209fc5/FLAG018f3d0e5 [2019-10-15 00:07:03,141 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:07:03,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label58.c [2019-10-15 00:07:03,161 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7474e5feb/adb511d1387942ee80e6fe1475209fc5/FLAG018f3d0e5 [2019-10-15 00:07:03,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7474e5feb/adb511d1387942ee80e6fe1475209fc5 [2019-10-15 00:07:03,417 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:07:03,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:07:03,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:03,420 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:07:03,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:07:03,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:03" (1/1) ... [2019-10-15 00:07:03,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4db268e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:03, skipping insertion in model container [2019-10-15 00:07:03,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:03" (1/1) ... [2019-10-15 00:07:03,435 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:07:03,496 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:07:04,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:04,141 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:07:04,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:04,284 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:07:04,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:04 WrapperNode [2019-10-15 00:07:04,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:04,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:07:04,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:07:04,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:07:04,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:04" (1/1) ... [2019-10-15 00:07:04,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:04" (1/1) ... [2019-10-15 00:07:04,326 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:04" (1/1) ... [2019-10-15 00:07:04,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:04" (1/1) ... [2019-10-15 00:07:04,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:04" (1/1) ... [2019-10-15 00:07:04,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:04" (1/1) ... [2019-10-15 00:07:04,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:04" (1/1) ... [2019-10-15 00:07:04,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:07:04,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:07:04,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:07:04,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:07:04,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:04" (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 [2019-10-15 00:07:04,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:07:04,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:07:04,494 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:07:04,494 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:07:04,494 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:07:04,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:07:04,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:07:04,495 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:07:04,495 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:07:04,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:07:04,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:07:06,023 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:07:06,024 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:07:06,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:06 BoogieIcfgContainer [2019-10-15 00:07:06,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:07:06,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:07:06,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:07:06,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:07:06,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:07:03" (1/3) ... [2019-10-15 00:07:06,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8b67c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:06, skipping insertion in model container [2019-10-15 00:07:06,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:04" (2/3) ... [2019-10-15 00:07:06,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8b67c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:06, skipping insertion in model container [2019-10-15 00:07:06,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:06" (3/3) ... [2019-10-15 00:07:06,036 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label58.c [2019-10-15 00:07:06,048 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:07:06,057 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:07:06,070 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:07:06,099 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:07:06,099 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:07:06,099 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:07:06,099 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:07:06,099 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:07:06,099 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:07:06,100 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:07:06,100 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:07:06,134 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:07:06,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 00:07:06,143 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:06,144 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] [2019-10-15 00:07:06,146 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:06,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1699451235, now seen corresponding path program 1 times [2019-10-15 00:07:06,165 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:06,166 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871472475] [2019-10-15 00:07:06,166 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:06,166 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:06,166 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:06,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871472475] [2019-10-15 00:07:06,447 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:06,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:06,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629934058] [2019-10-15 00:07:06,454 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:06,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:06,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:06,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:06,475 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-15 00:07:08,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:08,668 INFO L93 Difference]: Finished difference Result 890 states and 1607 transitions. [2019-10-15 00:07:08,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:08,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-15 00:07:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:08,697 INFO L225 Difference]: With dead ends: 890 [2019-10-15 00:07:08,698 INFO L226 Difference]: Without dead ends: 554 [2019-10-15 00:07:08,706 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:08,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-15 00:07:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-15 00:07:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-15 00:07:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 806 transitions. [2019-10-15 00:07:08,796 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 806 transitions. Word has length 20 [2019-10-15 00:07:08,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:08,798 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 806 transitions. [2019-10-15 00:07:08,799 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:08,799 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 806 transitions. [2019-10-15 00:07:08,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 00:07:08,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:08,806 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:07:08,807 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:08,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:08,807 INFO L82 PathProgramCache]: Analyzing trace with hash 72862738, now seen corresponding path program 1 times [2019-10-15 00:07:08,807 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:08,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141158758] [2019-10-15 00:07:08,808 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:08,808 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:08,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:09,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141158758] [2019-10-15 00:07:09,128 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:09,129 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:09,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035029105] [2019-10-15 00:07:09,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:09,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:09,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:09,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:09,135 INFO L87 Difference]: Start difference. First operand 554 states and 806 transitions. Second operand 4 states. [2019-10-15 00:07:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:10,888 INFO L93 Difference]: Finished difference Result 2194 states and 3252 transitions. [2019-10-15 00:07:10,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:10,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-10-15 00:07:10,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:10,904 INFO L225 Difference]: With dead ends: 2194 [2019-10-15 00:07:10,904 INFO L226 Difference]: Without dead ends: 1646 [2019-10-15 00:07:10,907 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 [2019-10-15 00:07:10,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-10-15 00:07:10,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1646. [2019-10-15 00:07:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-10-15 00:07:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2291 transitions. [2019-10-15 00:07:10,991 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2291 transitions. Word has length 132 [2019-10-15 00:07:10,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:10,992 INFO L462 AbstractCegarLoop]: Abstraction has 1646 states and 2291 transitions. [2019-10-15 00:07:10,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:10,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2291 transitions. [2019-10-15 00:07:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-15 00:07:11,002 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:11,002 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:07:11,002 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:11,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:11,003 INFO L82 PathProgramCache]: Analyzing trace with hash -700382803, now seen corresponding path program 1 times [2019-10-15 00:07:11,003 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:11,003 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631786124] [2019-10-15 00:07:11,004 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:11,004 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:11,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:11,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631786124] [2019-10-15 00:07:11,157 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:11,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:07:11,158 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751196528] [2019-10-15 00:07:11,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:07:11,161 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:11,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:07:11,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:07:11,162 INFO L87 Difference]: Start difference. First operand 1646 states and 2291 transitions. Second operand 4 states. [2019-10-15 00:07:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:12,681 INFO L93 Difference]: Finished difference Result 5652 states and 8154 transitions. [2019-10-15 00:07:12,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:07:12,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-10-15 00:07:12,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:12,709 INFO L225 Difference]: With dead ends: 5652 [2019-10-15 00:07:12,709 INFO L226 Difference]: Without dead ends: 4012 [2019-10-15 00:07:12,718 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 [2019-10-15 00:07:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4012 states. [2019-10-15 00:07:12,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4012 to 3830. [2019-10-15 00:07:12,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3830 states. [2019-10-15 00:07:12,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 5244 transitions. [2019-10-15 00:07:12,871 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 5244 transitions. Word has length 153 [2019-10-15 00:07:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:12,872 INFO L462 AbstractCegarLoop]: Abstraction has 3830 states and 5244 transitions. [2019-10-15 00:07:12,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:07:12,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 5244 transitions. [2019-10-15 00:07:12,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-10-15 00:07:12,887 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:12,888 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 00:07:12,889 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:12,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:12,889 INFO L82 PathProgramCache]: Analyzing trace with hash -763160813, now seen corresponding path program 1 times [2019-10-15 00:07:12,890 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:12,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295493260] [2019-10-15 00:07:12,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:12,891 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:12,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:13,495 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-10-15 00:07:13,938 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 114 proven. 86 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-15 00:07:13,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295493260] [2019-10-15 00:07:13,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152958529] [2019-10-15 00:07:13,939 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 [2019-10-15 00:07:14,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:14,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:07:14,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:14,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-15 00:07:14,436 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:14,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:14,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:14,606 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:14,633 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:14,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:07:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 39 proven. 138 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-15 00:07:15,085 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:07:15,085 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2019-10-15 00:07:15,085 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469374890] [2019-10-15 00:07:15,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:15,087 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:15,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:15,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-10-15 00:07:15,088 INFO L87 Difference]: Start difference. First operand 3830 states and 5244 transitions. Second operand 5 states. [2019-10-15 00:07:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:16,530 INFO L93 Difference]: Finished difference Result 7892 states and 10846 transitions. [2019-10-15 00:07:16,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:07:16,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 309 [2019-10-15 00:07:16,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:16,560 INFO L225 Difference]: With dead ends: 7892 [2019-10-15 00:07:16,561 INFO L226 Difference]: Without dead ends: 4250 [2019-10-15 00:07:16,573 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 613 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2019-10-15 00:07:16,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4250 states. [2019-10-15 00:07:16,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4250 to 3332. [2019-10-15 00:07:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3332 states. [2019-10-15 00:07:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 4463 transitions. [2019-10-15 00:07:16,719 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 4463 transitions. Word has length 309 [2019-10-15 00:07:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:16,719 INFO L462 AbstractCegarLoop]: Abstraction has 3332 states and 4463 transitions. [2019-10-15 00:07:16,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:07:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 4463 transitions. [2019-10-15 00:07:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-10-15 00:07:16,730 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:16,731 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 00:07:16,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:07:16,938 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:16,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:16,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1030212280, now seen corresponding path program 1 times [2019-10-15 00:07:16,939 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:16,940 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749543369] [2019-10-15 00:07:16,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:16,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:16,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 125 proven. 164 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:07:17,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749543369] [2019-10-15 00:07:17,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352400681] [2019-10-15 00:07:17,958 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 [2019-10-15 00:07:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:18,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 00:07:18,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:07:18,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:07:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 226 proven. 53 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 00:07:18,369 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:07:18,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:07:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 47 proven. 242 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:07:18,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [668133563] [2019-10-15 00:07:19,000 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 321 [2019-10-15 00:07:19,069 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:07:19,069 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:07:37,190 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:07:37,192 INFO L272 AbstractInterpreter]: Visited 139 different actions 273 times. Merged at 4 different actions 5 times. Never widened. Performed 539 root evaluator evaluations with a maximum evaluation depth of 13. Performed 539 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-15 00:07:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:37,196 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates