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/Problem11_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:05:00,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:05:00,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:05:00,287 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:05:00,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:05:00,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:05:00,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:05:00,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:05:00,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:05:00,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:05:00,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:05:00,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:05:00,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:05:00,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:05:00,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:05:00,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:05:00,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:05:00,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:05:00,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:05:00,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:05:00,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:05:00,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:05:00,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:05:00,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:05:00,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:05:00,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:05:00,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:05:00,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:05:00,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:05:00,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:05:00,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:05:00,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:05:00,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:05:00,349 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:05:00,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:05:00,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:05:00,355 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:05:00,377 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:05:00,377 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:05:00,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:05:00,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:05:00,380 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:05:00,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:05:00,380 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:05:00,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:05:00,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:05:00,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:05:00,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:05:00,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:05:00,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:05:00,383 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:05:00,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:05:00,384 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:05:00,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:05:00,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:05:00,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:05:00,384 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:05:00,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:05:00,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:05:00,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:05:00,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:05:00,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:05:00,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:05:00,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:05:00,386 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:05:00,386 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:05:00,709 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:05:00,726 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:05:00,730 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:05:00,732 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:05:00,732 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:05:00,733 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label44.c [2019-10-13 20:05:00,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d6cb101c/5b4cc5ac0884421a9c469ad3ff243b5c/FLAG83d913c1f [2019-10-13 20:05:01,454 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:05:01,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label44.c [2019-10-13 20:05:01,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d6cb101c/5b4cc5ac0884421a9c469ad3ff243b5c/FLAG83d913c1f [2019-10-13 20:05:01,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d6cb101c/5b4cc5ac0884421a9c469ad3ff243b5c [2019-10-13 20:05:01,641 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:05:01,643 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:05:01,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:01,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:05:01,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:05:01,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:01" (1/1) ... [2019-10-13 20:05:01,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40b5ff0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:01, skipping insertion in model container [2019-10-13 20:05:01,652 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:01" (1/1) ... [2019-10-13 20:05:01,660 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:05:01,727 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:05:02,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:02,453 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:05:02,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:02,719 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:05:02,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:02 WrapperNode [2019-10-13 20:05:02,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:02,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:05:02,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:05:02,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:05:02,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:02" (1/1) ... [2019-10-13 20:05:02,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:02" (1/1) ... [2019-10-13 20:05:02,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:02" (1/1) ... [2019-10-13 20:05:02,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:02" (1/1) ... [2019-10-13 20:05:02,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:02" (1/1) ... [2019-10-13 20:05:02,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:02" (1/1) ... [2019-10-13 20:05:02,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:02" (1/1) ... [2019-10-13 20:05:02,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:05:02,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:05:02,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:05:02,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:05:02,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:02" (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 [2019-10-13 20:05:02,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:05:02,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:05:02,991 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:05:02,991 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:05:02,992 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:05:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:05:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:05:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:05:02,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:05:02,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:05:02,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:05:04,890 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:05:04,890 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:05:04,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:04 BoogieIcfgContainer [2019-10-13 20:05:04,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:05:04,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:05:04,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:05:04,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:05:04,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:05:01" (1/3) ... [2019-10-13 20:05:04,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a444cb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:04, skipping insertion in model container [2019-10-13 20:05:04,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:02" (2/3) ... [2019-10-13 20:05:04,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a444cb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:04, skipping insertion in model container [2019-10-13 20:05:04,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:04" (3/3) ... [2019-10-13 20:05:04,905 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label44.c [2019-10-13 20:05:04,921 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:05:04,938 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:05:04,953 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:05:05,013 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:05:05,014 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:05:05,014 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:05:05,014 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:05:05,014 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:05:05,014 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:05:05,015 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:05:05,015 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:05:05,063 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:05:05,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 20:05:05,073 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:05,074 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] [2019-10-13 20:05:05,076 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:05,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:05,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1276641867, now seen corresponding path program 1 times [2019-10-13 20:05:05,094 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:05,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723539448] [2019-10-13 20:05:05,095 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:05,095 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:05,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:05,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:05,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723539448] [2019-10-13 20:05:05,463 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:05,463 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:05,463 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149438301] [2019-10-13 20:05:05,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:05,470 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:05,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:05,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:05,490 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-13 20:05:07,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:07,839 INFO L93 Difference]: Finished difference Result 975 states and 1750 transitions. [2019-10-13 20:05:07,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:05:07,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-13 20:05:07,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:07,867 INFO L225 Difference]: With dead ends: 975 [2019-10-13 20:05:07,867 INFO L226 Difference]: Without dead ends: 616 [2019-10-13 20:05:07,878 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:07,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2019-10-13 20:05:07,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 422. [2019-10-13 20:05:07,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2019-10-13 20:05:07,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 607 transitions. [2019-10-13 20:05:07,965 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 607 transitions. Word has length 32 [2019-10-13 20:05:07,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:07,968 INFO L462 AbstractCegarLoop]: Abstraction has 422 states and 607 transitions. [2019-10-13 20:05:07,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:05:07,968 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 607 transitions. [2019-10-13 20:05:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-13 20:05:07,975 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:07,976 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:07,977 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:07,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:07,979 INFO L82 PathProgramCache]: Analyzing trace with hash 201462154, now seen corresponding path program 1 times [2019-10-13 20:05:07,979 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:07,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745763773] [2019-10-13 20:05:07,979 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:07,979 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:07,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:08,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745763773] [2019-10-13 20:05:08,276 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:08,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:05:08,277 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454861891] [2019-10-13 20:05:08,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:05:08,282 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:08,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:05:08,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:05:08,283 INFO L87 Difference]: Start difference. First operand 422 states and 607 transitions. Second operand 6 states. [2019-10-13 20:05:09,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:09,852 INFO L93 Difference]: Finished difference Result 1241 states and 1811 transitions. [2019-10-13 20:05:09,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:05:09,853 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2019-10-13 20:05:09,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:09,860 INFO L225 Difference]: With dead ends: 1241 [2019-10-13 20:05:09,860 INFO L226 Difference]: Without dead ends: 825 [2019-10-13 20:05:09,863 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 [2019-10-13 20:05:09,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2019-10-13 20:05:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 814. [2019-10-13 20:05:09,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2019-10-13 20:05:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1163 transitions. [2019-10-13 20:05:09,915 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1163 transitions. Word has length 104 [2019-10-13 20:05:09,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:09,916 INFO L462 AbstractCegarLoop]: Abstraction has 814 states and 1163 transitions. [2019-10-13 20:05:09,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:05:09,916 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1163 transitions. [2019-10-13 20:05:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-13 20:05:09,920 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:09,920 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:09,920 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:09,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1596761827, now seen corresponding path program 1 times [2019-10-13 20:05:09,921 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:09,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554192325] [2019-10-13 20:05:09,922 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:09,922 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:09,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:10,201 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:10,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554192325] [2019-10-13 20:05:10,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68091424] [2019-10-13 20:05:10,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:05:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:10,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:05:10,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:10,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:05:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:10,510 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:10,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:10,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:10,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:10,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:10,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:05:10,746 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:10,747 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:10,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:05:10,750 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:10,833 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:10,938 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:05:10,939 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-10-13 20:05:10,939 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941711701] [2019-10-13 20:05:10,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 20:05:10,940 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:10,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 20:05:10,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:05:10,941 INFO L87 Difference]: Start difference. First operand 814 states and 1163 transitions. Second operand 7 states. [2019-10-13 20:05:13,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:13,588 INFO L93 Difference]: Finished difference Result 2829 states and 4164 transitions. [2019-10-13 20:05:13,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 20:05:13,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 105 [2019-10-13 20:05:13,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:13,603 INFO L225 Difference]: With dead ends: 2829 [2019-10-13 20:05:13,604 INFO L226 Difference]: Without dead ends: 2021 [2019-10-13 20:05:13,607 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2019-10-13 20:05:13,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2019-10-13 20:05:13,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1992. [2019-10-13 20:05:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1992 states. [2019-10-13 20:05:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 2629 transitions. [2019-10-13 20:05:13,688 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 2629 transitions. Word has length 105 [2019-10-13 20:05:13,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:13,688 INFO L462 AbstractCegarLoop]: Abstraction has 1992 states and 2629 transitions. [2019-10-13 20:05:13,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 20:05:13,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 2629 transitions. [2019-10-13 20:05:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 20:05:13,694 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:13,694 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:13,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:05:13,900 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:13,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:13,901 INFO L82 PathProgramCache]: Analyzing trace with hash -741406572, now seen corresponding path program 1 times [2019-10-13 20:05:13,901 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:13,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716309092] [2019-10-13 20:05:13,902 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:13,902 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:13,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:14,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716309092] [2019-10-13 20:05:14,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604936544] [2019-10-13 20:05:14,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:05:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:14,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:05:14,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:14,310 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:14,351 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:05:14,352 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-10-13 20:05:14,352 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770480495] [2019-10-13 20:05:14,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:14,353 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:14,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:14,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:05:14,354 INFO L87 Difference]: Start difference. First operand 1992 states and 2629 transitions. Second operand 4 states. [2019-10-13 20:05:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:16,077 INFO L93 Difference]: Finished difference Result 5541 states and 7566 transitions. [2019-10-13 20:05:16,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:05:16,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 163 [2019-10-13 20:05:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:16,108 INFO L225 Difference]: With dead ends: 5541 [2019-10-13 20:05:16,108 INFO L226 Difference]: Without dead ends: 3555 [2019-10-13 20:05:16,114 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:05:16,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3555 states. [2019-10-13 20:05:16,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3555 to 2965. [2019-10-13 20:05:16,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2965 states. [2019-10-13 20:05:16,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 3974 transitions. [2019-10-13 20:05:16,218 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 3974 transitions. Word has length 163 [2019-10-13 20:05:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:16,220 INFO L462 AbstractCegarLoop]: Abstraction has 2965 states and 3974 transitions. [2019-10-13 20:05:16,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:05:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 3974 transitions. [2019-10-13 20:05:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-13 20:05:16,228 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:16,229 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:16,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:05:16,434 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:16,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:16,435 INFO L82 PathProgramCache]: Analyzing trace with hash 967076156, now seen corresponding path program 1 times [2019-10-13 20:05:16,435 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:16,436 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242985185] [2019-10-13 20:05:16,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:16,436 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:16,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 20:05:16,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242985185] [2019-10-13 20:05:16,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268853478] [2019-10-13 20:05:16,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:05:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:16,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 20:05:16,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:16,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:16,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:17,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 20:05:18,884 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:18,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:18,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:18,990 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:18,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:19,054 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1944097005] [2019-10-13 20:05:19,060 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 233 [2019-10-13 20:05:19,119 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:05:19,119 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)