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 -i ../../../trunk/examples/svcomp/recursive-simple/fibo_25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:13:27,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:13:27,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:13:27,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-08 06:13:27,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:13:27,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:13:27,251 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:13:27,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:13:27,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:13:27,257 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:13:27,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:13:27,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:13:27,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:13:27,268 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:13:27,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:13:27,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:13:27,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-08 06:13:27,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-08 06:13:27,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-08 06:13:27,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-08 06:13:27,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-08 06:13:27,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-08 06:13:27,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-08 06:13:27,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-08 06:13:27,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-08 06:13:27,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:13:27,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:13:27,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:13:27,290 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 [2019-09-08 06:13:27,305 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:13:27,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:13:27,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:13:27,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:13:27,308 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:13:27,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:13:27,308 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:13:27,309 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:13:27,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:13:27,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:13:27,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:13:27,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:13:27,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:13:27,312 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:13:27,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:13:27,312 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:13:27,312 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:13:27,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:13:27,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:13:27,313 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:13:27,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:13:27,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:13:27,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:13:27,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:13:27,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:13:27,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:13:27,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:13:27,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:13:27,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:13:27,367 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:13:27,381 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:13:27,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:13:27,387 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:13:27,389 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:13:27,390 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2019-09-08 06:13:27,448 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ea5bf7d2/f1e0306de60648c890b496269d22380d/FLAG47a1c0353 [2019-09-08 06:13:27,913 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:13:27,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2019-09-08 06:13:27,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ea5bf7d2/f1e0306de60648c890b496269d22380d/FLAG47a1c0353 [2019-09-08 06:13:28,246 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ea5bf7d2/f1e0306de60648c890b496269d22380d [2019-09-08 06:13:28,259 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:13:28,261 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:13:28,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:13:28,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:13:28,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:13:28,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:13:28" (1/1) ... [2019-09-08 06:13:28,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15c13f7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:28, skipping insertion in model container [2019-09-08 06:13:28,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:13:28" (1/1) ... [2019-09-08 06:13:28,279 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:13:28,292 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:13:28,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:13:28,437 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:13:28,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:13:28,465 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:13:28,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:28 WrapperNode [2019-09-08 06:13:28,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:13:28,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:13:28,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:13:28,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:13:28,570 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:28" (1/1) ... [2019-09-08 06:13:28,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:28" (1/1) ... [2019-09-08 06:13:28,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:28" (1/1) ... [2019-09-08 06:13:28,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:28" (1/1) ... [2019-09-08 06:13:28,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:28" (1/1) ... [2019-09-08 06:13:28,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:28" (1/1) ... [2019-09-08 06:13:28,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:28" (1/1) ... [2019-09-08 06:13:28,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:13:28,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:13:28,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:13:28,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:13:28,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:28" (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 [2019-09-08 06:13:28,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:13:28,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:13:28,649 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-09-08 06:13:28,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:13:28,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:13:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:13:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-09-08 06:13:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:13:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:13:28,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:13:28,812 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:13:28,812 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:13:28,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:13:28 BoogieIcfgContainer [2019-09-08 06:13:28,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:13:28,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:13:28,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:13:28,818 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:13:28,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:13:28" (1/3) ... [2019-09-08 06:13:28,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6597e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:13:28, skipping insertion in model container [2019-09-08 06:13:28,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:13:28" (2/3) ... [2019-09-08 06:13:28,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6597e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:13:28, skipping insertion in model container [2019-09-08 06:13:28,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:13:28" (3/3) ... [2019-09-08 06:13:28,822 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_25-2.c [2019-09-08 06:13:28,832 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:13:28,839 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:13:28,852 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:13:28,886 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:13:28,887 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:13:28,887 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:13:28,887 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:13:28,887 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:13:28,888 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:13:28,888 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:13:28,888 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:13:28,888 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:13:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-09-08 06:13:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:13:28,914 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:28,915 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:28,917 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:28,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:28,924 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2019-09-08 06:13:28,926 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:28,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:28,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:28,975 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:28,975 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:13:29,122 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:13:29,123 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:13:29,129 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:13:29,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:13:29,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:13:29,159 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2019-09-08 06:13:29,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:29,408 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-09-08 06:13:29,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:13:29,410 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:13:29,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:29,425 INFO L225 Difference]: With dead ends: 35 [2019-09-08 06:13:29,425 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 06:13:29,430 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:13:29,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 06:13:29,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-08 06:13:29,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:13:29,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-08 06:13:29,483 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2019-09-08 06:13:29,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:29,483 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-08 06:13:29,483 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:13:29,484 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-08 06:13:29,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 06:13:29,486 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:29,486 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:29,487 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:29,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:29,487 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2019-09-08 06:13:29,488 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:29,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:29,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:29,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:29,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:29,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:13:29,534 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:13:29,534 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:13:29,536 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:13:29,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:13:29,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:13:29,537 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2019-09-08 06:13:29,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:29,609 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-09-08 06:13:29,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:13:29,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-08 06:13:29,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:29,612 INFO L225 Difference]: With dead ends: 27 [2019-09-08 06:13:29,612 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 06:13:29,613 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:13:29,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 06:13:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-09-08 06:13:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:13:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-08 06:13:29,623 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2019-09-08 06:13:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:29,623 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-08 06:13:29,623 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:13:29,624 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-08 06:13:29,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 06:13:29,625 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:29,625 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:29,626 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:29,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:29,626 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2019-09-08 06:13:29,626 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:29,627 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:29,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:29,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:29,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-08 06:13:29,712 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:29,712 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:29,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:29,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:13:29,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-08 06:13:29,867 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:29,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-09-08 06:13:29,869 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 06:13:29,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 06:13:29,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:13:29,871 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2019-09-08 06:13:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:30,020 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2019-09-08 06:13:30,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 06:13:30,021 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-09-08 06:13:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:30,022 INFO L225 Difference]: With dead ends: 38 [2019-09-08 06:13:30,022 INFO L226 Difference]: Without dead ends: 23 [2019-09-08 06:13:30,024 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:13:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-08 06:13:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-08 06:13:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-08 06:13:30,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-09-08 06:13:30,032 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2019-09-08 06:13:30,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:30,032 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-09-08 06:13:30,032 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 06:13:30,032 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-09-08 06:13:30,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:13:30,034 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:30,034 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:30,035 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:30,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:30,035 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2019-09-08 06:13:30,036 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:30,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:30,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:30,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:30,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:13:30,121 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:30,121 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:30,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:30,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:13:30,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:13:30,185 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:30,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-09-08 06:13:30,187 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 06:13:30,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 06:13:30,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:13:30,188 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2019-09-08 06:13:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:30,292 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2019-09-08 06:13:30,295 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 06:13:30,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-09-08 06:13:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:30,297 INFO L225 Difference]: With dead ends: 32 [2019-09-08 06:13:30,299 INFO L226 Difference]: Without dead ends: 28 [2019-09-08 06:13:30,299 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:13:30,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-08 06:13:30,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-08 06:13:30,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-08 06:13:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2019-09-08 06:13:30,316 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2019-09-08 06:13:30,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:30,317 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2019-09-08 06:13:30,317 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 06:13:30,317 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2019-09-08 06:13:30,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 06:13:30,321 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:30,321 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:30,322 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:30,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:30,323 INFO L82 PathProgramCache]: Analyzing trace with hash 146085807, now seen corresponding path program 2 times [2019-09-08 06:13:30,323 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:30,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:30,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:30,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:30,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-08 06:13:30,537 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:30,537 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:30,552 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:30,571 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:30,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:30,572 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:13:30,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-08 06:13:30,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:30,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-09-08 06:13:30,651 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:13:30,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:13:30,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:13:30,652 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 13 states. [2019-09-08 06:13:31,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:31,042 INFO L93 Difference]: Finished difference Result 66 states and 99 transitions. [2019-09-08 06:13:31,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:13:31,044 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2019-09-08 06:13:31,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:31,046 INFO L225 Difference]: With dead ends: 66 [2019-09-08 06:13:31,046 INFO L226 Difference]: Without dead ends: 44 [2019-09-08 06:13:31,050 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2019-09-08 06:13:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-08 06:13:31,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-09-08 06:13:31,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:13:31,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2019-09-08 06:13:31,070 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 40 [2019-09-08 06:13:31,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:31,070 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2019-09-08 06:13:31,070 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:13:31,071 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2019-09-08 06:13:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-08 06:13:31,078 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:31,079 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:31,081 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:31,081 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 3 times [2019-09-08 06:13:31,082 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:31,082 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:31,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:31,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:31,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-09-08 06:13:31,222 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:31,223 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:31,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:31,269 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-08 06:13:31,269 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:31,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:13:31,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 25 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-09-08 06:13:31,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:31,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:13:31,315 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:13:31,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:13:31,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:13:31,316 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 7 states. [2019-09-08 06:13:31,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:31,410 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2019-09-08 06:13:31,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:13:31,411 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2019-09-08 06:13:31,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:31,414 INFO L225 Difference]: With dead ends: 49 [2019-09-08 06:13:31,415 INFO L226 Difference]: Without dead ends: 45 [2019-09-08 06:13:31,415 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:13:31,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-08 06:13:31,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2019-09-08 06:13:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:13:31,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2019-09-08 06:13:31,430 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 68 [2019-09-08 06:13:31,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:31,431 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2019-09-08 06:13:31,436 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:13:31,436 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2019-09-08 06:13:31,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-08 06:13:31,437 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:31,438 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:31,438 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:31,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:31,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 4 times [2019-09-08 06:13:31,439 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:31,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:31,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:31,441 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:31,441 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 46 proven. 109 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2019-09-08 06:13:31,568 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:31,569 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:31,584 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:13:31,613 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:13:31,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:31,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-08 06:13:31,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 93 proven. 162 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2019-09-08 06:13:31,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:31,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 13 [2019-09-08 06:13:31,728 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:13:31,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:13:31,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:13:31,729 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand 13 states. [2019-09-08 06:13:32,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:32,143 INFO L93 Difference]: Finished difference Result 93 states and 141 transitions. [2019-09-08 06:13:32,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:13:32,143 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2019-09-08 06:13:32,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:32,145 INFO L225 Difference]: With dead ends: 93 [2019-09-08 06:13:32,145 INFO L226 Difference]: Without dead ends: 57 [2019-09-08 06:13:32,147 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:13:32,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-08 06:13:32,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-09-08 06:13:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 06:13:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2019-09-08 06:13:32,158 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 96 [2019-09-08 06:13:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:32,158 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2019-09-08 06:13:32,158 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:13:32,158 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2019-09-08 06:13:32,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-08 06:13:32,160 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:32,160 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:32,160 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:32,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:32,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1040445716, now seen corresponding path program 5 times [2019-09-08 06:13:32,161 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:32,161 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:32,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:32,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:32,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 106 proven. 211 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2019-09-08 06:13:32,306 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:32,306 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:32,327 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:13:32,374 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-08 06:13:32,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:32,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:13:32,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 187 proven. 336 refuted. 0 times theorem prover too weak. 410 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:13:32,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:32,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 14 [2019-09-08 06:13:32,548 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:13:32,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:13:32,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:13:32,551 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand 14 states. [2019-09-08 06:13:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:33,064 INFO L93 Difference]: Finished difference Result 118 states and 193 transitions. [2019-09-08 06:13:33,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 06:13:33,066 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 136 [2019-09-08 06:13:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:33,069 INFO L225 Difference]: With dead ends: 118 [2019-09-08 06:13:33,069 INFO L226 Difference]: Without dead ends: 73 [2019-09-08 06:13:33,071 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2019-09-08 06:13:33,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-08 06:13:33,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2019-09-08 06:13:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 06:13:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 91 transitions. [2019-09-08 06:13:33,088 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 91 transitions. Word has length 136 [2019-09-08 06:13:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:33,090 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 91 transitions. [2019-09-08 06:13:33,090 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:13:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 91 transitions. [2019-09-08 06:13:33,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-09-08 06:13:33,093 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:33,093 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 23, 14, 14, 14, 14, 14, 14, 14, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:33,093 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:33,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:33,094 INFO L82 PathProgramCache]: Analyzing trace with hash -509498553, now seen corresponding path program 6 times [2019-09-08 06:13:33,094 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:33,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:33,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:33,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:33,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:33,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 162 proven. 486 refuted. 0 times theorem prover too weak. 1593 trivial. 0 not checked. [2019-09-08 06:13:33,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:33,326 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:13:33,355 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:33,444 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2019-09-08 06:13:33,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:33,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:13:33,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2241 backedges. 236 proven. 396 refuted. 0 times theorem prover too weak. 1609 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:13:33,571 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:33,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-09-08 06:13:33,573 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:13:33,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:13:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:13:33,573 INFO L87 Difference]: Start difference. First operand 68 states and 91 transitions. Second operand 11 states. [2019-09-08 06:13:33,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:33,732 INFO L93 Difference]: Finished difference Result 77 states and 109 transitions. [2019-09-08 06:13:33,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:13:33,735 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 204 [2019-09-08 06:13:33,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:33,738 INFO L225 Difference]: With dead ends: 77 [2019-09-08 06:13:33,738 INFO L226 Difference]: Without dead ends: 73 [2019-09-08 06:13:33,739 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:13:33,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-08 06:13:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-09-08 06:13:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-08 06:13:33,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 103 transitions. [2019-09-08 06:13:33,751 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 103 transitions. Word has length 204 [2019-09-08 06:13:33,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:33,752 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 103 transitions. [2019-09-08 06:13:33,752 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:13:33,752 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 103 transitions. [2019-09-08 06:13:33,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-09-08 06:13:33,756 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:33,756 INFO L399 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:33,757 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:33,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:33,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 7 times [2019-09-08 06:13:33,757 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:33,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:33,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:33,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:33,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2019-09-08 06:13:34,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:34,014 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:34,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:34,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:13:34,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2019-09-08 06:13:34,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:34,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2019-09-08 06:13:34,201 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:13:34,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:13:34,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:13:34,202 INFO L87 Difference]: Start difference. First operand 73 states and 103 transitions. Second operand 11 states. [2019-09-08 06:13:34,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:34,416 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2019-09-08 06:13:34,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:13:34,417 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 286 [2019-09-08 06:13:34,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:34,421 INFO L225 Difference]: With dead ends: 82 [2019-09-08 06:13:34,421 INFO L226 Difference]: Without dead ends: 78 [2019-09-08 06:13:34,422 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:13:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-08 06:13:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-08 06:13:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-08 06:13:34,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 117 transitions. [2019-09-08 06:13:34,435 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 117 transitions. Word has length 286 [2019-09-08 06:13:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:34,436 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 117 transitions. [2019-09-08 06:13:34,436 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:13:34,436 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 117 transitions. [2019-09-08 06:13:34,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2019-09-08 06:13:34,446 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:34,447 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 60, 37, 37, 37, 37, 37, 37, 37, 23, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:34,447 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:34,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:34,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1819430198, now seen corresponding path program 8 times [2019-09-08 06:13:34,448 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:34,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:34,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:34,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:13:34,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 15534 backedges. 409 proven. 2574 refuted. 0 times theorem prover too weak. 12551 trivial. 0 not checked. [2019-09-08 06:13:34,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:34,819 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:34,831 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:13:34,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:13:34,984 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:34,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 06:13:34,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 15534 backedges. 409 proven. 2574 refuted. 0 times theorem prover too weak. 12551 trivial. 0 not checked. [2019-09-08 06:13:35,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:35,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-09-08 06:13:35,151 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:13:35,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:13:35,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:13:35,152 INFO L87 Difference]: Start difference. First operand 78 states and 117 transitions. Second operand 12 states. [2019-09-08 06:13:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:35,447 INFO L93 Difference]: Finished difference Result 87 states and 139 transitions. [2019-09-08 06:13:35,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:13:35,448 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 517 [2019-09-08 06:13:35,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:35,451 INFO L225 Difference]: With dead ends: 87 [2019-09-08 06:13:35,451 INFO L226 Difference]: Without dead ends: 83 [2019-09-08 06:13:35,452 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 525 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:13:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-08 06:13:35,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-09-08 06:13:35,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-08 06:13:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 133 transitions. [2019-09-08 06:13:35,467 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 133 transitions. Word has length 517 [2019-09-08 06:13:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:35,468 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 133 transitions. [2019-09-08 06:13:35,468 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:13:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 133 transitions. [2019-09-08 06:13:35,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1049 [2019-09-08 06:13:35,516 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:35,517 INFO L399 BasicCegarLoop]: trace histogram [153, 153, 123, 76, 76, 76, 76, 76, 76, 76, 47, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:35,517 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:35,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:35,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2106464943, now seen corresponding path program 9 times [2019-09-08 06:13:35,518 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:35,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:35,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:35,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:35,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 65415 backedges. 925 proven. 5526 refuted. 0 times theorem prover too weak. 58964 trivial. 0 not checked. [2019-09-08 06:13:36,670 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:36,671 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:36,690 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:13:36,870 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-09-08 06:13:36,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:36,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-08 06:13:36,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 65415 backedges. 881 proven. 6365 refuted. 0 times theorem prover too weak. 58169 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:13:37,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:37,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2019-09-08 06:13:37,426 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:13:37,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:13:37,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:13:37,428 INFO L87 Difference]: Start difference. First operand 83 states and 133 transitions. Second operand 13 states. [2019-09-08 06:13:37,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:37,716 INFO L93 Difference]: Finished difference Result 92 states and 157 transitions. [2019-09-08 06:13:37,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 06:13:37,717 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 1048 [2019-09-08 06:13:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:37,733 INFO L225 Difference]: With dead ends: 92 [2019-09-08 06:13:37,733 INFO L226 Difference]: Without dead ends: 88 [2019-09-08 06:13:37,734 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1075 GetRequests, 1055 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2019-09-08 06:13:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-08 06:13:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-09-08 06:13:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-08 06:13:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 151 transitions. [2019-09-08 06:13:37,748 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 151 transitions. Word has length 1048 [2019-09-08 06:13:37,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:37,749 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 151 transitions. [2019-09-08 06:13:37,749 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:13:37,749 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 151 transitions. [2019-09-08 06:13:37,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1431 [2019-09-08 06:13:37,766 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:37,767 INFO L399 BasicCegarLoop]: trace histogram [209, 209, 169, 104, 104, 104, 104, 104, 104, 104, 65, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:37,767 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:37,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:37,768 INFO L82 PathProgramCache]: Analyzing trace with hash 2074198041, now seen corresponding path program 10 times [2019-09-08 06:13:37,768 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:37,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:37,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:37,769 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:37,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 122564 backedges. 1356 proven. 9822 refuted. 0 times theorem prover too weak. 111386 trivial. 0 not checked. [2019-09-08 06:13:39,241 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:39,241 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:39,253 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:13:39,604 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:13:39,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:39,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 2545 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-08 06:13:39,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 122564 backedges. 60873 proven. 3686 refuted. 0 times theorem prover too weak. 58005 trivial. 0 not checked. [2019-09-08 06:13:40,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:40,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 23 [2019-09-08 06:13:40,653 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 06:13:40,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 06:13:40,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2019-09-08 06:13:40,654 INFO L87 Difference]: Start difference. First operand 88 states and 151 transitions. Second operand 23 states. [2019-09-08 06:13:42,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:42,768 INFO L93 Difference]: Finished difference Result 258 states and 698 transitions. [2019-09-08 06:13:42,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-08 06:13:42,768 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1430 [2019-09-08 06:13:42,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:42,772 INFO L225 Difference]: With dead ends: 258 [2019-09-08 06:13:42,773 INFO L226 Difference]: Without dead ends: 184 [2019-09-08 06:13:42,778 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1505 GetRequests, 1431 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1130, Invalid=4570, Unknown=0, NotChecked=0, Total=5700 [2019-09-08 06:13:42,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-09-08 06:13:42,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 169. [2019-09-08 06:13:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-09-08 06:13:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 271 transitions. [2019-09-08 06:13:42,800 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 271 transitions. Word has length 1430 [2019-09-08 06:13:42,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:42,801 INFO L475 AbstractCegarLoop]: Abstraction has 169 states and 271 transitions. [2019-09-08 06:13:42,801 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 06:13:42,802 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 271 transitions. [2019-09-08 06:13:42,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1962 [2019-09-08 06:13:42,847 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:42,849 INFO L399 BasicCegarLoop]: trace histogram [287, 287, 232, 143, 143, 143, 143, 143, 143, 143, 89, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:42,849 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:42,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1868832152, now seen corresponding path program 11 times [2019-09-08 06:13:42,851 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:42,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:42,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:42,852 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:42,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 231572 backedges. 2007 proven. 15097 refuted. 0 times theorem prover too weak. 214468 trivial. 0 not checked. [2019-09-08 06:13:45,627 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:45,627 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:45,639 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:13:48,119 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 248 check-sat command(s) [2019-09-08 06:13:48,120 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:48,130 INFO L256 TraceCheckSpWp]: Trace formula consists of 4355 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 06:13:48,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:13:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 231572 backedges. 10405 proven. 5147 refuted. 0 times theorem prover too weak. 216020 trivial. 0 not checked. [2019-09-08 06:13:49,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:13:49,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2019-09-08 06:13:49,508 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 06:13:49,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 06:13:49,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-09-08 06:13:49,509 INFO L87 Difference]: Start difference. First operand 169 states and 271 transitions. Second operand 15 states. [2019-09-08 06:13:49,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:13:49,869 INFO L93 Difference]: Finished difference Result 178 states and 294 transitions. [2019-09-08 06:13:49,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 06:13:49,870 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 1961 [2019-09-08 06:13:49,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:13:49,876 INFO L225 Difference]: With dead ends: 178 [2019-09-08 06:13:49,877 INFO L226 Difference]: Without dead ends: 174 [2019-09-08 06:13:49,877 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 1996 GetRequests, 1972 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2019-09-08 06:13:49,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-09-08 06:13:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2019-09-08 06:13:49,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-09-08 06:13:49,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 288 transitions. [2019-09-08 06:13:49,894 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 288 transitions. Word has length 1961 [2019-09-08 06:13:49,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:13:49,896 INFO L475 AbstractCegarLoop]: Abstraction has 174 states and 288 transitions. [2019-09-08 06:13:49,896 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 06:13:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 288 transitions. [2019-09-08 06:13:49,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3637 [2019-09-08 06:13:49,988 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:13:49,989 INFO L399 BasicCegarLoop]: trace histogram [533, 533, 431, 266, 266, 266, 266, 266, 266, 266, 165, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:13:49,990 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:13:49,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:13:49,991 INFO L82 PathProgramCache]: Analyzing trace with hash 331970689, now seen corresponding path program 12 times [2019-09-08 06:13:49,991 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:13:49,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:13:49,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:49,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:13:49,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:13:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:13:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 800757 backedges. 3975 proven. 28356 refuted. 0 times theorem prover too weak. 768426 trivial. 0 not checked. [2019-09-08 06:13:57,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:13:57,647 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:13:57,661 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:13:57,922 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2019-09-08 06:13:57,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:13:57,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 06:13:57,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 800757 backedges. 5910 proven. 23438 refuted. 0 times theorem prover too weak. 771409 trivial. 0 not checked. [2019-09-08 06:14:03,170 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:03,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-09-08 06:14:03,174 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 06:14:03,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 06:14:03,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:14:03,175 INFO L87 Difference]: Start difference. First operand 174 states and 288 transitions. Second operand 16 states. [2019-09-08 06:14:03,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:03,506 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2019-09-08 06:14:03,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:14:03,506 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 3636 [2019-09-08 06:14:03,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:03,514 INFO L225 Difference]: With dead ends: 183 [2019-09-08 06:14:03,514 INFO L226 Difference]: Without dead ends: 179 [2019-09-08 06:14:03,517 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3672 GetRequests, 3646 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:14:03,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-09-08 06:14:03,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2019-09-08 06:14:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-09-08 06:14:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 307 transitions. [2019-09-08 06:14:03,536 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 307 transitions. Word has length 3636 [2019-09-08 06:14:03,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:03,537 INFO L475 AbstractCegarLoop]: Abstraction has 179 states and 307 transitions. [2019-09-08 06:14:03,537 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 06:14:03,537 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 307 transitions. [2019-09-08 06:14:03,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6742 [2019-09-08 06:14:03,800 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:03,802 INFO L399 BasicCegarLoop]: trace histogram [989, 989, 800, 494, 494, 494, 494, 494, 494, 494, 306, 189, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:03,803 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:03,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:03,804 INFO L82 PathProgramCache]: Analyzing trace with hash -401837339, now seen corresponding path program 13 times [2019-09-08 06:14:03,804 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:03,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:03,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:03,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:14:03,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2760948 backedges. 6742 proven. 59435 refuted. 0 times theorem prover too weak. 2694771 trivial. 0 not checked. [2019-09-08 06:14:22,274 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:14:22,274 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:14:22,284 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:14:24,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 14968 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-08 06:14:24,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:14:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2760948 backedges. 6570 proven. 65215 refuted. 0 times theorem prover too weak. 2689163 trivial. 0 not checked. [2019-09-08 06:14:37,874 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:14:37,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2019-09-08 06:14:37,880 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:14:37,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:14:37,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:14:37,880 INFO L87 Difference]: Start difference. First operand 179 states and 307 transitions. Second operand 17 states. [2019-09-08 06:14:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:14:38,292 INFO L93 Difference]: Finished difference Result 188 states and 334 transitions. [2019-09-08 06:14:38,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 06:14:38,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 6741 [2019-09-08 06:14:38,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:14:38,304 INFO L225 Difference]: With dead ends: 188 [2019-09-08 06:14:38,304 INFO L226 Difference]: Without dead ends: 184 [2019-09-08 06:14:38,305 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6780 GetRequests, 6752 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2019-09-08 06:14:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-09-08 06:14:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2019-09-08 06:14:38,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2019-09-08 06:14:38,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 328 transitions. [2019-09-08 06:14:38,333 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 328 transitions. Word has length 6741 [2019-09-08 06:14:38,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:14:38,336 INFO L475 AbstractCegarLoop]: Abstraction has 184 states and 328 transitions. [2019-09-08 06:14:38,336 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:14:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 328 transitions. [2019-09-08 06:14:38,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10269 [2019-09-08 06:14:38,897 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:14:38,901 INFO L399 BasicCegarLoop]: trace histogram [1507, 1507, 1219, 753, 753, 753, 753, 753, 753, 753, 466, 288, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:14:38,901 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:14:38,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:14:38,903 INFO L82 PathProgramCache]: Analyzing trace with hash -287649748, now seen corresponding path program 14 times [2019-09-08 06:14:38,903 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:14:38,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:14:38,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:38,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:14:38,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:14:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:15:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6413967 backedges. 10317 proven. 99549 refuted. 0 times theorem prover too weak. 6304101 trivial. 0 not checked. [2019-09-08 06:15:23,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:15:23,304 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:15:23,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:15:26,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:15:26,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:15:26,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 22799 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-08 06:15:26,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:16:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6413967 backedges. 10140 proven. 108332 refuted. 0 times theorem prover too weak. 6295495 trivial. 0 not checked. [2019-09-08 06:16:00,652 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:16:00,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 18 [2019-09-08 06:16:00,661 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:16:00,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:16:00,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:16:00,662 INFO L87 Difference]: Start difference. First operand 184 states and 328 transitions. Second operand 18 states. [2019-09-08 06:16:01,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:16:01,119 INFO L93 Difference]: Finished difference Result 193 states and 357 transitions. [2019-09-08 06:16:01,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:16:01,120 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 10268 [2019-09-08 06:16:01,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:16:01,134 INFO L225 Difference]: With dead ends: 193 [2019-09-08 06:16:01,135 INFO L226 Difference]: Without dead ends: 189 [2019-09-08 06:16:01,139 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10310 GetRequests, 10280 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2019-09-08 06:16:01,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-09-08 06:16:01,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2019-09-08 06:16:01,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-09-08 06:16:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 351 transitions. [2019-09-08 06:16:01,163 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 351 transitions. Word has length 10268 [2019-09-08 06:16:01,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:16:01,167 INFO L475 AbstractCegarLoop]: Abstraction has 189 states and 351 transitions. [2019-09-08 06:16:01,167 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:16:01,167 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 351 transitions. [2019-09-08 06:16:03,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18181 [2019-09-08 06:16:03,369 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:16:03,374 INFO L399 BasicCegarLoop]: trace histogram [2669, 2669, 2159, 1334, 1334, 1334, 1334, 1334, 1334, 1334, 825, 510, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:16:03,375 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:16:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:16:03,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1268364425, now seen corresponding path program 15 times [2019-09-08 06:16:03,379 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:16:03,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:16:03,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:03,380 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:16:03,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:16:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:18:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20127789 backedges. 21442 proven. 189206 refuted. 0 times theorem prover too weak. 19917141 trivial. 0 not checked. [2019-09-08 06:18:18,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:18:18,721 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:18:18,733 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:18:19,782 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2019-09-08 06:18:19,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:18:19,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 1153 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-08 06:18:19,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:20:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20127789 backedges. 20152 proven. 205841 refuted. 0 times theorem prover too weak. 19901796 trivial. 0 not checked. [2019-09-08 06:20:00,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:20:00,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 19 [2019-09-08 06:20:00,304 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:20:00,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:20:00,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:20:00,305 INFO L87 Difference]: Start difference. First operand 189 states and 351 transitions. Second operand 19 states. [2019-09-08 06:20:00,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:20:00,814 INFO L93 Difference]: Finished difference Result 198 states and 382 transitions. [2019-09-08 06:20:00,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 06:20:00,815 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 18180 [2019-09-08 06:20:00,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:20:00,836 INFO L225 Difference]: With dead ends: 198 [2019-09-08 06:20:00,836 INFO L226 Difference]: Without dead ends: 194 [2019-09-08 06:20:00,837 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18225 GetRequests, 18193 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 06:20:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-09-08 06:20:00,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2019-09-08 06:20:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-09-08 06:20:00,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 376 transitions. [2019-09-08 06:20:00,855 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 376 transitions. Word has length 18180 [2019-09-08 06:20:00,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:20:00,860 INFO L475 AbstractCegarLoop]: Abstraction has 194 states and 376 transitions. [2019-09-08 06:20:00,860 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:20:00,860 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 376 transitions. [2019-09-08 06:20:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28477 [2019-09-08 06:20:05,514 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:20:05,522 INFO L399 BasicCegarLoop]: trace histogram [4181, 4181, 3383, 2090, 2090, 2090, 2090, 2090, 2090, 2090, 1293, 798, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:20:05,522 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:20:05,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:20:05,527 INFO L82 PathProgramCache]: Analyzing trace with hash -723892591, now seen corresponding path program 16 times [2019-09-08 06:20:05,527 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:20:05,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:20:05,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:20:05,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:20:05,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:21:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:25:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 49405833 backedges. 48526 proven. 293631 refuted. 0 times theorem prover too weak. 49063676 trivial. 0 not checked. [2019-09-08 06:25:18,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:25:18,868 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:25:18,881 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:25:26,289 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:25:26,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:25:26,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 50679 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-08 06:25:26,996 INFO L279 TraceCheckSpWp]: Computing forward predicates...