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/id_i25_o25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:27:45,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:27:45,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:27:45,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:27:45,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:27:45,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:27:45,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:27:45,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:27:45,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:27:45,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:27:45,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:27:45,376 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:27:45,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:27:45,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:27:45,381 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:27:45,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:27:45,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:27:45,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:27:45,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:27:45,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:27:45,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:27:45,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:27:45,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:27:45,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:27:45,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-08 06:27:45,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-08 06:27:45,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-08 06:27:45,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-08 06:27:45,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-08 06:27:45,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-08 06:27:45,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-08 06:27:45,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-08 06:27:45,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-08 06:27:45,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-08 06:27:45,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-08 06:27:45,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-08 06:27:45,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-08 06:27:45,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-08 06:27:45,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:27:45,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:27:45,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:27:45,413 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 06:27:45,427 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:27:45,428 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:27:45,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:27:45,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:27:45,429 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:27:45,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:27:45,430 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:27:45,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:27:45,430 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:27:45,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:27:45,431 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:27:45,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:27:45,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:27:45,431 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:27:45,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:27:45,432 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:27:45,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:27:45,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:27:45,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:27:45,433 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:27:45,433 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:27:45,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:27:45,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:27:45,433 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:27:45,434 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:27:45,434 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:27:45,434 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:27:45,434 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:27:45,434 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:27:45,469 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:27:45,489 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:27:45,493 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:27:45,495 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:27:45,495 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:27:45,496 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2019-09-08 06:27:45,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9b0aa37e/c14fe8fe1c954a0aa65f0b8a3a312bb6/FLAGd295fb32c [2019-09-08 06:27:46,046 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:27:46,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-1.c [2019-09-08 06:27:46,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9b0aa37e/c14fe8fe1c954a0aa65f0b8a3a312bb6/FLAGd295fb32c [2019-09-08 06:27:46,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9b0aa37e/c14fe8fe1c954a0aa65f0b8a3a312bb6 [2019-09-08 06:27:46,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:27:46,415 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:27:46,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:27:46,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:27:46,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:27:46,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:27:46" (1/1) ... [2019-09-08 06:27:46,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2aeb50c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:46, skipping insertion in model container [2019-09-08 06:27:46,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:27:46" (1/1) ... [2019-09-08 06:27:46,433 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:27:46,450 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:27:46,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:27:46,698 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:27:46,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:27:46,738 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:27:46,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:46 WrapperNode [2019-09-08 06:27:46,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:27:46,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:27:46,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:27:46,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:27:46,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:46" (1/1) ... [2019-09-08 06:27:46,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:46" (1/1) ... [2019-09-08 06:27:46,908 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:46" (1/1) ... [2019-09-08 06:27:46,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:46" (1/1) ... [2019-09-08 06:27:46,915 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:46" (1/1) ... [2019-09-08 06:27:46,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:46" (1/1) ... [2019-09-08 06:27:46,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:46" (1/1) ... [2019-09-08 06:27:46,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:27:46,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:27:46,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:27:46,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:27:46,922 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:46" (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 06:27:46,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:27:46,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:27:46,980 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-09-08 06:27:46,980 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:27:46,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-09-08 06:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:27:46,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:27:47,128 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:27:47,129 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:27:47,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:27:47 BoogieIcfgContainer [2019-09-08 06:27:47,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:27:47,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:27:47,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:27:47,135 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:27:47,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:27:46" (1/3) ... [2019-09-08 06:27:47,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570beede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:27:47, skipping insertion in model container [2019-09-08 06:27:47,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:46" (2/3) ... [2019-09-08 06:27:47,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570beede and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:27:47, skipping insertion in model container [2019-09-08 06:27:47,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:27:47" (3/3) ... [2019-09-08 06:27:47,138 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2019-09-08 06:27:47,148 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:27:47,154 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:27:47,170 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:27:47,201 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:27:47,202 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:27:47,202 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:27:47,202 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:27:47,202 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:27:47,202 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:27:47,202 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:27:47,203 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:27:47,203 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:27:47,221 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-08 06:27:47,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:27:47,227 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:47,228 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:47,230 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:47,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:47,236 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2019-09-08 06:27:47,238 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:47,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:47,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:47,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:47,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:27:47,448 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:27:47,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:27:47,455 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:27:47,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:27:47,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:47,478 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2019-09-08 06:27:47,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:47,591 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-09-08 06:27:47,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:27:47,593 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:27:47,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:47,604 INFO L225 Difference]: With dead ends: 30 [2019-09-08 06:27:47,604 INFO L226 Difference]: Without dead ends: 18 [2019-09-08 06:27:47,608 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 06:27:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-08 06:27:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-08 06:27:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-08 06:27:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-08 06:27:47,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-08 06:27:47,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:47,650 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-08 06:27:47,650 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:27:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-08 06:27:47,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-08 06:27:47,652 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:47,653 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:47,653 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:47,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:47,654 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2019-09-08 06:27:47,654 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:47,654 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:47,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:47,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:47,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-08 06:27:47,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:47,736 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) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:47,754 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:47,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:27:47,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:27:47,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:47,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-09-08 06:27:47,834 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-08 06:27:47,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-08 06:27:47,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:27:47,835 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2019-09-08 06:27:47,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:47,933 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-09-08 06:27:47,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-08 06:27:47,934 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-09-08 06:27:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:47,935 INFO L225 Difference]: With dead ends: 25 [2019-09-08 06:27:47,936 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 06:27:47,938 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 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 06:27:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 06:27:47,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-08 06:27:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:27:47,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-08 06:27:47,950 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2019-09-08 06:27:47,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:47,952 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-08 06:27:47,952 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-08 06:27:47,952 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-08 06:27:47,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-08 06:27:47,954 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:47,954 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:47,955 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:47,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:47,955 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2019-09-08 06:27:47,956 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:47,956 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:47,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:47,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:47,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 06:27:48,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:48,061 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) [2019-09-08 06:27:48,076 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:48,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:27:48,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:48,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:27:48,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-08 06:27:48,150 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:48,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:27:48,152 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:27:48,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:27:48,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:27:48,153 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2019-09-08 06:27:48,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:48,234 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2019-09-08 06:27:48,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:27:48,236 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-09-08 06:27:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:48,238 INFO L225 Difference]: With dead ends: 28 [2019-09-08 06:27:48,238 INFO L226 Difference]: Without dead ends: 24 [2019-09-08 06:27:48,239 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 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 06:27:48,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-08 06:27:48,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-08 06:27:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-08 06:27:48,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-09-08 06:27:48,246 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2019-09-08 06:27:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:48,246 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-09-08 06:27:48,246 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:27:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-09-08 06:27:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-08 06:27:48,249 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:48,249 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:48,249 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:48,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:48,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2019-09-08 06:27:48,250 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:48,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:48,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:48,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:48,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-08 06:27:48,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:48,385 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 06:27:48,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:48,436 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-08 06:27:48,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:48,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:27:48,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-08 06:27:48,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:48,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-09-08 06:27:48,485 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 06:27:48,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 06:27:48,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:27:48,487 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2019-09-08 06:27:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:48,593 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2019-09-08 06:27:48,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-08 06:27:48,594 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2019-09-08 06:27:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:48,595 INFO L225 Difference]: With dead ends: 31 [2019-09-08 06:27:48,595 INFO L226 Difference]: Without dead ends: 27 [2019-09-08 06:27:48,596 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:27:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-08 06:27:48,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-08 06:27:48,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-08 06:27:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-09-08 06:27:48,602 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2019-09-08 06:27:48,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:48,603 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-09-08 06:27:48,603 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 06:27:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-09-08 06:27:48,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-08 06:27:48,604 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:48,605 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:48,605 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:48,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2019-09-08 06:27:48,606 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:48,606 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:48,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:48,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:48,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-08 06:27:48,731 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:48,731 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:48,746 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:27:48,763 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:27:48,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:48,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:27:48,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:48,784 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:27:48,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:48,790 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-09-08 06:27:48,790 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 06:27:48,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 06:27:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:27:48,791 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2019-09-08 06:27:48,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:48,889 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2019-09-08 06:27:48,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 06:27:48,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-09-08 06:27:48,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:48,891 INFO L225 Difference]: With dead ends: 34 [2019-09-08 06:27:48,891 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 06:27:48,892 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:27:48,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 06:27:48,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 06:27:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:27:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-09-08 06:27:48,898 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2019-09-08 06:27:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:48,899 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-09-08 06:27:48,899 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 06:27:48,899 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-09-08 06:27:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-08 06:27:48,902 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:48,902 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:48,902 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:48,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:48,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2019-09-08 06:27:48,903 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:48,903 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:48,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:48,904 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:48,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-08 06:27:49,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:49,057 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) [2019-09-08 06:27:49,075 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:49,110 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-08 06:27:49,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:49,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-08 06:27:49,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-08 06:27:49,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:49,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-09-08 06:27:49,152 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 06:27:49,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 06:27:49,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:27:49,159 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2019-09-08 06:27:49,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:49,292 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2019-09-08 06:27:49,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:27:49,293 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2019-09-08 06:27:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:49,295 INFO L225 Difference]: With dead ends: 37 [2019-09-08 06:27:49,295 INFO L226 Difference]: Without dead ends: 33 [2019-09-08 06:27:49,296 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:27:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-08 06:27:49,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-08 06:27:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-08 06:27:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-09-08 06:27:49,302 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2019-09-08 06:27:49,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:49,302 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-09-08 06:27:49,302 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 06:27:49,303 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-09-08 06:27:49,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-08 06:27:49,304 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:49,304 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:49,305 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:49,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:49,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2019-09-08 06:27:49,305 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:49,305 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:49,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:49,306 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:49,307 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:49,421 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-08 06:27:49,421 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:49,422 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) [2019-09-08 06:27:49,437 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:49,473 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-08 06:27:49,474 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:49,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:27:49,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 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 06:27:49,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:49,508 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2019-09-08 06:27:49,508 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:27:49,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:27:49,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:27:49,509 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2019-09-08 06:27:49,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:49,644 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2019-09-08 06:27:49,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:27:49,644 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2019-09-08 06:27:49,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:49,655 INFO L225 Difference]: With dead ends: 40 [2019-09-08 06:27:49,655 INFO L226 Difference]: Without dead ends: 36 [2019-09-08 06:27:49,657 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 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 06:27:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-08 06:27:49,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-08 06:27:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-08 06:27:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-09-08 06:27:49,671 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2019-09-08 06:27:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:49,674 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-09-08 06:27:49,674 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:27:49,674 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-09-08 06:27:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-08 06:27:49,676 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:49,676 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:49,676 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:49,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2019-09-08 06:27:49,677 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:49,677 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:49,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:49,681 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:49,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-08 06:27:49,787 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:49,788 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:49,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:49,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-08 06:27:49,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 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 06:27:49,860 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:49,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-09-08 06:27:49,861 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:27:49,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:27:49,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:27:49,862 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2019-09-08 06:27:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:50,044 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2019-09-08 06:27:50,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:27:50,045 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2019-09-08 06:27:50,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:50,046 INFO L225 Difference]: With dead ends: 43 [2019-09-08 06:27:50,046 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:27:50,048 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 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 06:27:50,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:27:50,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 06:27:50,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:27:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-09-08 06:27:50,066 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2019-09-08 06:27:50,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:50,067 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-09-08 06:27:50,067 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:27:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-09-08 06:27:50,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-08 06:27:50,071 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:50,071 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:50,072 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:50,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2019-09-08 06:27:50,072 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:50,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:50,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:50,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:50,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:50,224 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-09-08 06:27:50,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:50,225 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) [2019-09-08 06:27:50,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:50,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:27:50,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:50,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-08 06:27:50,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:27:50,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:50,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2019-09-08 06:27:50,316 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-08 06:27:50,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-08 06:27:50,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2019-09-08 06:27:50,317 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2019-09-08 06:27:50,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:50,495 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2019-09-08 06:27:50,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 06:27:50,495 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2019-09-08 06:27:50,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:50,497 INFO L225 Difference]: With dead ends: 46 [2019-09-08 06:27:50,497 INFO L226 Difference]: Without dead ends: 42 [2019-09-08 06:27:50,498 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2019-09-08 06:27:50,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-08 06:27:50,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-08 06:27:50,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:27:50,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-09-08 06:27:50,506 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2019-09-08 06:27:50,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:50,506 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-09-08 06:27:50,507 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-08 06:27:50,507 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-09-08 06:27:50,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-08 06:27:50,508 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:50,508 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:50,508 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:50,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:50,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2019-09-08 06:27:50,509 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:50,509 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:50,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:50,510 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:50,510 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:50,661 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-09-08 06:27:50,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:50,662 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 06:27:50,682 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:27:50,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-08 06:27:50,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:50,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-08 06:27:50,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-09-08 06:27:50,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:50,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2019-09-08 06:27:50,753 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:27:50,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:27:50,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:27:50,754 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2019-09-08 06:27:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:50,971 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2019-09-08 06:27:50,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-08 06:27:50,972 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2019-09-08 06:27:50,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:50,973 INFO L225 Difference]: With dead ends: 49 [2019-09-08 06:27:50,974 INFO L226 Difference]: Without dead ends: 45 [2019-09-08 06:27:50,979 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:27:50,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-08 06:27:50,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-08 06:27:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-08 06:27:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-09-08 06:27:50,987 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2019-09-08 06:27:50,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:50,990 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-09-08 06:27:50,990 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:27:50,990 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-09-08 06:27:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-08 06:27:50,991 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:50,991 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:50,992 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:50,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:50,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2019-09-08 06:27:50,996 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:50,996 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:50,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:50,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:50,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:51,168 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-09-08 06:27:51,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:51,168 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 06:27:51,180 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:27:51,205 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:27:51,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:51,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-08 06:27:51,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:51,242 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 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 06:27:51,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:51,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2019-09-08 06:27:51,254 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 06:27:51,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 06:27:51,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2019-09-08 06:27:51,255 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 15 states. [2019-09-08 06:27:51,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:51,470 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2019-09-08 06:27:51,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 06:27:51,471 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2019-09-08 06:27:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:51,472 INFO L225 Difference]: With dead ends: 52 [2019-09-08 06:27:51,472 INFO L226 Difference]: Without dead ends: 48 [2019-09-08 06:27:51,474 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 84 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 06:27:51,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-08 06:27:51,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-08 06:27:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-08 06:27:51,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-09-08 06:27:51,480 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2019-09-08 06:27:51,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:51,480 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-09-08 06:27:51,481 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 06:27:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-09-08 06:27:51,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-08 06:27:51,482 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:51,482 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:51,483 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:51,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:51,483 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2019-09-08 06:27:51,483 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:51,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:51,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:51,484 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:51,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-09-08 06:27:51,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:51,669 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 06:27:51,692 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:27:51,727 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-08 06:27:51,727 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:51,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-08 06:27:51,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (12)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:27:51,768 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:51,768 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2019-09-08 06:27:51,769 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 06:27:51,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 06:27:51,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:27:51,770 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 16 states. [2019-09-08 06:27:51,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:51,983 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2019-09-08 06:27:51,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:27:51,984 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2019-09-08 06:27:51,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:51,985 INFO L225 Difference]: With dead ends: 55 [2019-09-08 06:27:51,985 INFO L226 Difference]: Without dead ends: 51 [2019-09-08 06:27:51,986 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:27:51,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-08 06:27:51,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-08 06:27:51,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 06:27:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2019-09-08 06:27:51,992 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2019-09-08 06:27:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:51,993 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2019-09-08 06:27:51,993 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 06:27:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2019-09-08 06:27:51,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-08 06:27:51,994 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:51,994 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:51,994 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:51,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:51,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2019-09-08 06:27:51,995 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:51,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:51,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:51,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:51,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-09-08 06:27:52,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:52,174 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 06:27:52,199 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:27:52,239 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-08 06:27:52,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:52,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-08 06:27:52,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-09-08 06:27:52,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:52,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2019-09-08 06:27:52,282 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:27:52,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:27:52,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:27:52,283 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 17 states. [2019-09-08 06:27:52,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:52,545 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2019-09-08 06:27:52,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 06:27:52,545 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 85 [2019-09-08 06:27:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:52,547 INFO L225 Difference]: With dead ends: 58 [2019-09-08 06:27:52,547 INFO L226 Difference]: Without dead ends: 54 [2019-09-08 06:27:52,548 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2019-09-08 06:27:52,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-08 06:27:52,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-08 06:27:52,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 06:27:52,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2019-09-08 06:27:52,572 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2019-09-08 06:27:52,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:52,572 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2019-09-08 06:27:52,572 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:27:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2019-09-08 06:27:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-08 06:27:52,574 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:52,574 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:52,574 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:52,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:52,574 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2019-09-08 06:27:52,575 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:52,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:52,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:52,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:52,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-09-08 06:27:52,774 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:52,774 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 06:27:52,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:52,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-08 06:27:52,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (14)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:27:52,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:52,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2019-09-08 06:27:52,869 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:27:52,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:27:52,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:27:52,870 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 18 states. [2019-09-08 06:27:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:53,131 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2019-09-08 06:27:53,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:27:53,133 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 91 [2019-09-08 06:27:53,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:53,134 INFO L225 Difference]: With dead ends: 61 [2019-09-08 06:27:53,134 INFO L226 Difference]: Without dead ends: 57 [2019-09-08 06:27:53,135 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2019-09-08 06:27:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-08 06:27:53,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-09-08 06:27:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 06:27:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-09-08 06:27:53,141 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2019-09-08 06:27:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:53,142 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-09-08 06:27:53,142 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:27:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-09-08 06:27:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-08 06:27:53,143 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:53,143 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:53,144 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:53,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:53,144 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2019-09-08 06:27:53,144 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:53,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:53,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:53,145 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:53,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-09-08 06:27:53,333 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:53,333 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 06:27:53,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:27:53,394 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:27:53,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:53,395 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-08 06:27:53,398 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-09-08 06:27:53,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:53,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2019-09-08 06:27:53,442 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-08 06:27:53,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-08 06:27:53,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:27:53,443 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 19 states. [2019-09-08 06:27:53,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:53,740 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2019-09-08 06:27:53,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 06:27:53,740 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2019-09-08 06:27:53,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:53,742 INFO L225 Difference]: With dead ends: 64 [2019-09-08 06:27:53,742 INFO L226 Difference]: Without dead ends: 60 [2019-09-08 06:27:53,743 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 06:27:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-08 06:27:53,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-08 06:27:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:27:53,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2019-09-08 06:27:53,754 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2019-09-08 06:27:53,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:53,755 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2019-09-08 06:27:53,755 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-08 06:27:53,755 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2019-09-08 06:27:53,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-08 06:27:53,756 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:53,757 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:53,757 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:53,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:53,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2019-09-08 06:27:53,758 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:53,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:53,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:53,759 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:53,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-09-08 06:27:54,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:54,014 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:27:54,029 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:54,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-08 06:27:54,089 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:54,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-08 06:27:54,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:54,127 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-09-08 06:27:54,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:54,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2019-09-08 06:27:54,133 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 06:27:54,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 06:27:54,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:27:54,135 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2019-09-08 06:27:54,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:54,477 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2019-09-08 06:27:54,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-08 06:27:54,477 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2019-09-08 06:27:54,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:54,479 INFO L225 Difference]: With dead ends: 67 [2019-09-08 06:27:54,479 INFO L226 Difference]: Without dead ends: 63 [2019-09-08 06:27:54,480 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 06:27:54,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-08 06:27:54,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-08 06:27:54,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 06:27:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2019-09-08 06:27:54,486 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2019-09-08 06:27:54,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:54,487 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2019-09-08 06:27:54,487 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 06:27:54,487 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2019-09-08 06:27:54,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-08 06:27:54,488 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:54,489 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:54,489 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2019-09-08 06:27:54,490 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:54,490 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:54,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:54,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:54,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-09-08 06:27:54,763 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:54,763 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 06:27:54,773 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:27:54,807 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:27:54,807 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:54,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-08 06:27:54,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:54,839 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-09-08 06:27:54,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:54,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2019-09-08 06:27:54,852 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-08 06:27:54,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-08 06:27:54,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:27:54,853 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 21 states. [2019-09-08 06:27:55,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:55,141 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2019-09-08 06:27:55,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-08 06:27:55,142 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 109 [2019-09-08 06:27:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:55,143 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:27:55,143 INFO L226 Difference]: Without dead ends: 66 [2019-09-08 06:27:55,144 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 06:27:55,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-08 06:27:55,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-09-08 06:27:55,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:27:55,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2019-09-08 06:27:55,149 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2019-09-08 06:27:55,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:55,150 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2019-09-08 06:27:55,150 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-08 06:27:55,150 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2019-09-08 06:27:55,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-08 06:27:55,151 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:55,151 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:55,152 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:55,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:55,152 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2019-09-08 06:27:55,152 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:55,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:55,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:55,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:55,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-09-08 06:27:55,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:55,401 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 06:27:55,415 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:27:55,486 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-08 06:27:55,487 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:55,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 38 conjunts are in the unsatisfiable core [2019-09-08 06:27:55,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-09-08 06:27:55,525 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:55,525 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2019-09-08 06:27:55,526 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-08 06:27:55,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-08 06:27:55,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2019-09-08 06:27:55,527 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 22 states. [2019-09-08 06:27:55,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:55,861 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2019-09-08 06:27:55,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-08 06:27:55,861 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 115 [2019-09-08 06:27:55,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:55,863 INFO L225 Difference]: With dead ends: 73 [2019-09-08 06:27:55,863 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:27:55,864 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2019-09-08 06:27:55,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:27:55,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-09-08 06:27:55,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-08 06:27:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2019-09-08 06:27:55,869 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2019-09-08 06:27:55,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:55,869 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2019-09-08 06:27:55,869 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-08 06:27:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2019-09-08 06:27:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-08 06:27:55,870 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:55,871 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:55,871 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:55,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:55,871 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2019-09-08 06:27:55,871 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:55,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:55,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:55,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:55,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-09-08 06:27:56,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:56,111 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:56,131 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:27:56,182 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-08 06:27:56,182 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:56,183 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjunts are in the unsatisfiable core [2019-09-08 06:27:56,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-09-08 06:27:56,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:56,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2019-09-08 06:27:56,233 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-08 06:27:56,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-08 06:27:56,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2019-09-08 06:27:56,236 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 23 states. [2019-09-08 06:27:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:56,659 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2019-09-08 06:27:56,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 06:27:56,659 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2019-09-08 06:27:56,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:56,661 INFO L225 Difference]: With dead ends: 76 [2019-09-08 06:27:56,661 INFO L226 Difference]: Without dead ends: 72 [2019-09-08 06:27:56,662 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 06:27:56,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-08 06:27:56,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-09-08 06:27:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-08 06:27:56,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2019-09-08 06:27:56,671 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2019-09-08 06:27:56,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:56,672 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2019-09-08 06:27:56,672 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-08 06:27:56,672 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2019-09-08 06:27:56,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-08 06:27:56,673 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:56,673 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:56,674 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:56,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:56,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2019-09-08 06:27:56,674 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:56,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:56,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:56,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:56,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-09-08 06:27:56,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:56,976 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:56,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:57,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-08 06:27:57,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-09-08 06:27:57,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:57,072 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2019-09-08 06:27:57,072 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-08 06:27:57,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-08 06:27:57,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:27:57,073 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 24 states. [2019-09-08 06:27:57,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:57,539 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2019-09-08 06:27:57,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-08 06:27:57,540 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 127 [2019-09-08 06:27:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:57,541 INFO L225 Difference]: With dead ends: 79 [2019-09-08 06:27:57,541 INFO L226 Difference]: Without dead ends: 75 [2019-09-08 06:27:57,544 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2019-09-08 06:27:57,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-08 06:27:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-09-08 06:27:57,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-08 06:27:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2019-09-08 06:27:57,549 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2019-09-08 06:27:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:57,550 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2019-09-08 06:27:57,550 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-08 06:27:57,550 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2019-09-08 06:27:57,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-09-08 06:27:57,551 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:57,551 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:57,551 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:57,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:57,552 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2019-09-08 06:27:57,552 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:57,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:57,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:57,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:57,554 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-09-08 06:27:57,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:57,927 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:57,947 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:27:57,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:27:57,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:57,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 44 conjunts are in the unsatisfiable core [2019-09-08 06:27:57,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:58,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (21)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:27:58,044 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:58,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2019-09-08 06:27:58,045 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-08 06:27:58,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-08 06:27:58,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2019-09-08 06:27:58,047 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 25 states. [2019-09-08 06:27:58,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:58,509 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2019-09-08 06:27:58,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-08 06:27:58,510 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 133 [2019-09-08 06:27:58,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:58,511 INFO L225 Difference]: With dead ends: 82 [2019-09-08 06:27:58,511 INFO L226 Difference]: Without dead ends: 78 [2019-09-08 06:27:58,512 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2019-09-08 06:27:58,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-08 06:27:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-08 06:27:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-08 06:27:58,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2019-09-08 06:27:58,517 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2019-09-08 06:27:58,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:58,519 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2019-09-08 06:27:58,519 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-08 06:27:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2019-09-08 06:27:58,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-08 06:27:58,521 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:58,521 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:58,521 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:58,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:58,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2019-09-08 06:27:58,522 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:58,522 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:58,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:58,524 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:58,524 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:58,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-09-08 06:27:58,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:58,868 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:27:58,887 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:58,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-08 06:27:58,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:58,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 46 conjunts are in the unsatisfiable core [2019-09-08 06:27:58,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-09-08 06:27:58,993 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:58,993 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2019-09-08 06:27:58,994 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-08 06:27:58,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-08 06:27:58,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2019-09-08 06:27:58,995 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2019-09-08 06:27:59,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:59,430 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2019-09-08 06:27:59,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-08 06:27:59,433 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2019-09-08 06:27:59,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:59,434 INFO L225 Difference]: With dead ends: 85 [2019-09-08 06:27:59,434 INFO L226 Difference]: Without dead ends: 81 [2019-09-08 06:27:59,435 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2019-09-08 06:27:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-08 06:27:59,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-09-08 06:27:59,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-08 06:27:59,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2019-09-08 06:27:59,440 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2019-09-08 06:27:59,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:59,440 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2019-09-08 06:27:59,440 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-08 06:27:59,440 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2019-09-08 06:27:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-08 06:27:59,441 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:59,441 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:59,441 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:59,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2019-09-08 06:27:59,442 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:59,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:59,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:59,443 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:59,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-09-08 06:27:59,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:59,798 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:27:59,812 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:59,856 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:27:59,856 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:59,858 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-08 06:27:59,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (23)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:27:59,924 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:59,925 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2019-09-08 06:27:59,925 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-08 06:27:59,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-08 06:27:59,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2019-09-08 06:27:59,926 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 27 states. [2019-09-08 06:28:00,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:00,353 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2019-09-08 06:28:00,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-08 06:28:00,354 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 145 [2019-09-08 06:28:00,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:00,355 INFO L225 Difference]: With dead ends: 88 [2019-09-08 06:28:00,355 INFO L226 Difference]: Without dead ends: 84 [2019-09-08 06:28:00,356 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2019-09-08 06:28:00,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-08 06:28:00,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-08 06:28:00,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-08 06:28:00,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2019-09-08 06:28:00,361 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2019-09-08 06:28:00,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:00,361 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2019-09-08 06:28:00,361 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-08 06:28:00,361 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2019-09-08 06:28:00,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-09-08 06:28:00,362 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:00,363 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:28:00,363 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:00,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:00,363 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2019-09-08 06:28:00,363 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:00,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:00,364 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:00,364 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:28:00,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2019-09-08 06:28:00,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:00,714 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:28:00,727 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:28:00,793 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-08 06:28:00,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:28:00,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 50 conjunts are in the unsatisfiable core [2019-09-08 06:28:00,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (24)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:28:00,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:00,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2019-09-08 06:28:00,842 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-08 06:28:00,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-08 06:28:00,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:28:00,843 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 28 states. [2019-09-08 06:28:01,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:01,372 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2019-09-08 06:28:01,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 06:28:01,372 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2019-09-08 06:28:01,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:01,374 INFO L225 Difference]: With dead ends: 91 [2019-09-08 06:28:01,374 INFO L226 Difference]: Without dead ends: 87 [2019-09-08 06:28:01,376 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2019-09-08 06:28:01,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-08 06:28:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-09-08 06:28:01,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-08 06:28:01,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2019-09-08 06:28:01,380 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2019-09-08 06:28:01,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:01,381 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2019-09-08 06:28:01,381 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-08 06:28:01,381 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2019-09-08 06:28:01,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-09-08 06:28:01,382 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:01,382 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:28:01,383 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:01,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:01,383 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2019-09-08 06:28:01,383 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:01,383 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:01,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:01,384 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:28:01,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:01,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-09-08 06:28:01,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:01,942 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:28:01,953 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:28:02,044 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-08 06:28:02,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:28:02,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 52 conjunts are in the unsatisfiable core [2019-09-08 06:28:02,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-09-08 06:28:02,103 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:02,103 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2019-09-08 06:28:02,104 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-08 06:28:02,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-08 06:28:02,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2019-09-08 06:28:02,105 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 29 states. [2019-09-08 06:28:02,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:02,657 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2019-09-08 06:28:02,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-08 06:28:02,658 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 157 [2019-09-08 06:28:02,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:02,660 INFO L225 Difference]: With dead ends: 94 [2019-09-08 06:28:02,660 INFO L226 Difference]: Without dead ends: 90 [2019-09-08 06:28:02,662 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2019-09-08 06:28:02,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-08 06:28:02,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-09-08 06:28:02,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-08 06:28:02,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2019-09-08 06:28:02,666 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2019-09-08 06:28:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:02,667 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2019-09-08 06:28:02,667 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-08 06:28:02,667 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2019-09-08 06:28:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-08 06:28:02,668 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:02,668 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:28:02,668 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:02,669 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2019-09-08 06:28:02,669 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:02,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:02,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:02,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:28:02,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-09-08 06:28:04,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:04,313 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:28:04,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:28:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:04,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-08 06:28:04,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (26)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:28:04,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:04,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2019-09-08 06:28:04,550 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-08 06:28:04,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-08 06:28:04,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-09-08 06:28:04,552 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2019-09-08 06:28:05,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:05,885 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2019-09-08 06:28:05,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-08 06:28:05,885 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2019-09-08 06:28:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:05,887 INFO L225 Difference]: With dead ends: 97 [2019-09-08 06:28:05,887 INFO L226 Difference]: Without dead ends: 93 [2019-09-08 06:28:05,889 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-09-08 06:28:05,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-08 06:28:05,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-08 06:28:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-08 06:28:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2019-09-08 06:28:05,894 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2019-09-08 06:28:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:05,895 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2019-09-08 06:28:05,895 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-08 06:28:05,895 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2019-09-08 06:28:05,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-09-08 06:28:05,896 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:05,896 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:28:05,896 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:05,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:05,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2019-09-08 06:28:05,897 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:05,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:05,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:05,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:28:05,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 52 proven. 1051 refuted. 0 times theorem prover too weak. 951 trivial. 0 not checked. [2019-09-08 06:28:06,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:06,941 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:28:06,952 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:28:07,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:28:07,017 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:28:07,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 56 conjunts are in the unsatisfiable core [2019-09-08 06:28:07,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2019-09-08 06:28:08,155 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-08 06:28:08,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [31] imperfect sequences [32] total 61 [2019-09-08 06:28:08,156 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-08 06:28:08,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-08 06:28:08,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=2834, Unknown=0, NotChecked=0, Total=3660 [2019-09-08 06:28:08,158 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 61 states. [2019-09-08 06:28:09,581 WARN L188 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2019-09-08 06:28:09,901 WARN L188 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2019-09-08 06:28:10,206 WARN L188 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 100 [2019-09-08 06:28:10,512 WARN L188 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 96 [2019-09-08 06:28:10,791 WARN L188 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2019-09-08 06:28:11,086 WARN L188 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2019-09-08 06:28:11,363 WARN L188 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2019-09-08 06:28:11,620 WARN L188 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2019-09-08 06:28:11,846 WARN L188 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2019-09-08 06:28:12,067 WARN L188 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 72 [2019-09-08 06:28:12,280 WARN L188 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2019-09-08 06:28:12,492 WARN L188 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2019-09-08 06:28:12,716 WARN L188 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2019-09-08 06:28:12,911 WARN L188 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2019-09-08 06:28:13,100 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2019-09-08 06:28:13,298 WARN L188 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2019-09-08 06:28:13,515 WARN L188 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2019-09-08 06:28:15,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:15,517 INFO L93 Difference]: Finished difference Result 241 states and 890 transitions. [2019-09-08 06:28:15,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-09-08 06:28:15,523 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 169 [2019-09-08 06:28:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:15,523 INFO L225 Difference]: With dead ends: 241 [2019-09-08 06:28:15,523 INFO L226 Difference]: Without dead ends: 0 [2019-09-08 06:28:15,530 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3516, Invalid=9140, Unknown=0, NotChecked=0, Total=12656 [2019-09-08 06:28:15,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-08 06:28:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-08 06:28:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-08 06:28:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-08 06:28:15,531 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 169 [2019-09-08 06:28:15,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:15,532 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-08 06:28:15,532 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-08 06:28:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-08 06:28:15,532 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-08 06:28:15,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-08 06:28:15,710 WARN L188 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 11 [2019-09-08 06:28:15,712 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-08 06:28:15,713 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:28:15,713 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:28:15,713 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-08 06:28:15,713 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-08 06:28:15,713 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-08 06:28:15,713 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2019-09-08 06:28:15,713 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2019-09-08 06:28:15,714 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-09-08 06:28:15,714 INFO L443 ceAbstractionStarter]: For program point L13(line 13) no Hoare annotation was computed. [2019-09-08 06:28:15,714 INFO L443 ceAbstractionStarter]: For program point L12(lines 12 14) no Hoare annotation was computed. [2019-09-08 06:28:15,714 INFO L439 ceAbstractionStarter]: At program point L11(line 11) the Hoare annotation is: (and (<= main_~input~0 25) (<= 25 main_~input~0)) [2019-09-08 06:28:15,714 INFO L443 ceAbstractionStarter]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-09-08 06:28:15,714 INFO L443 ceAbstractionStarter]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2019-09-08 06:28:15,714 INFO L443 ceAbstractionStarter]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2019-09-08 06:28:15,715 INFO L443 ceAbstractionStarter]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2019-09-08 06:28:15,715 INFO L446 ceAbstractionStarter]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2019-09-08 06:28:15,715 INFO L439 ceAbstractionStarter]: At program point L6(line 6) the Hoare annotation is: (or (not (<= 0 |id_#in~x|)) (and (<= |id_#in~x| id_~x) (<= 1 |id_#in~x|) (<= id_~x |id_#in~x|))) [2019-09-08 06:28:15,715 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-09-08 06:28:15,715 INFO L443 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-09-08 06:28:15,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 06:28:15 BoogieIcfgContainer [2019-09-08 06:28:15,718 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 06:28:15,720 INFO L168 Benchmark]: Toolchain (without parser) took 29304.98 ms. Allocated memory was 139.5 MB in the beginning and 508.6 MB in the end (delta: 369.1 MB). Free memory was 89.3 MB in the beginning and 447.9 MB in the end (delta: -358.6 MB). Peak memory consumption was 365.2 MB. Max. memory is 7.1 GB. [2019-09-08 06:28:15,720 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 139.5 MB. Free memory was 107.0 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-08 06:28:15,721 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.27 ms. Allocated memory is still 139.5 MB. Free memory was 89.1 MB in the beginning and 80.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-09-08 06:28:15,722 INFO L168 Benchmark]: Boogie Preprocessor took 180.17 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 80.0 MB in the beginning and 180.5 MB in the end (delta: -100.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-09-08 06:28:15,722 INFO L168 Benchmark]: RCFGBuilder took 209.47 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 169.1 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-08 06:28:15,723 INFO L168 Benchmark]: TraceAbstraction took 28586.86 ms. Allocated memory was 201.9 MB in the beginning and 508.6 MB in the end (delta: 306.7 MB). Free memory was 169.1 MB in the beginning and 447.9 MB in the end (delta: -278.8 MB). Peak memory consumption was 382.6 MB. Max. memory is 7.1 GB. [2019-09-08 06:28:15,726 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 139.5 MB. Free memory was 107.0 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 323.27 ms. Allocated memory is still 139.5 MB. Free memory was 89.1 MB in the beginning and 80.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 180.17 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 80.0 MB in the beginning and 180.5 MB in the end (delta: -100.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 209.47 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 169.1 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28586.86 ms. Allocated memory was 201.9 MB in the beginning and 508.6 MB in the end (delta: 306.7 MB). Free memory was 169.1 MB in the beginning and 447.9 MB in the end (delta: -278.8 MB). Peak memory consumption was 382.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. SAFE Result, 28.5s OverallTime, 27 OverallIterations, 27 TraceHistogramMax, 15.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 454 SDtfs, 1454 SDslu, 6096 SDs, 0 SdLazy, 5704 SolverSat, 1428 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3681 GetRequests, 2815 SyntacticMatches, 2 SemanticMatches, 864 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4795 ImplicationChecksByTransitivity, 16.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=93occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 57 PreInvPairs, 57 NumberOfFragments, 27 HoareAnnotationTreeSize, 57 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 376 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 9.5s InterpolantComputationTime, 4901 NumberOfCodeBlocks, 4901 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 4848 ConstructedInterpolants, 0 QuantifiedInterpolants, 1584720 SizeOfPredicates, 377 NumberOfNonLiveVariables, 5720 ConjunctsInSsa, 859 ConjunctsInUnsatCore, 53 InterpolantComputations, 2 PerfectInterpolantSequences, 19957/37908 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...