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_o100.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:27:57,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:27:57,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:27:57,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:27:57,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:27:57,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:27:57,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:27:57,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:27:57,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:27:57,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:27:57,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:27:57,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:27:57,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:27:57,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:27:57,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:27:57,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:27:57,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:27:57,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:27:57,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:27:57,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:27:57,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:27:57,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:27:57,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:27:57,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:27:57,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-08 06:27:57,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-08 06:27:57,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-08 06:27:57,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-08 06:27:57,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-08 06:27:57,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-08 06:27:57,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-08 06:27:57,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-08 06:27:57,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-08 06:27:57,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-08 06:27:57,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-08 06:27:57,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-08 06:27:57,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-08 06:27:57,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-08 06:27:57,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:27:57,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:27:57,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:27:57,269 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 06:27:57,294 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:27:57,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:27:57,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:27:57,298 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:27:57,298 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:27:57,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:27:57,298 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:27:57,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:27:57,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:27:57,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:27:57,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:27:57,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:27:57,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:27:57,301 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:27:57,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:27:57,301 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:27:57,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:27:57,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:27:57,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:27:57,302 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:27:57,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:27:57,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:27:57,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:27:57,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:27:57,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:27:57,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:27:57,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:27:57,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:27:57,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:27:57,363 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:27:57,375 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:27:57,379 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:27:57,380 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:27:57,380 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:27:57,381 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o100.c [2019-09-08 06:27:57,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aac8adba0/83faa921278f41cba3616abb21ae8643/FLAG803eb77c2 [2019-09-08 06:27:57,873 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:27:57,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o100.c [2019-09-08 06:27:57,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aac8adba0/83faa921278f41cba3616abb21ae8643/FLAG803eb77c2 [2019-09-08 06:27:58,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aac8adba0/83faa921278f41cba3616abb21ae8643 [2019-09-08 06:27:58,301 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:27:58,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:27:58,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:27:58,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:27:58,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:27:58,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:27:58" (1/1) ... [2019-09-08 06:27:58,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47bcba9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:58, skipping insertion in model container [2019-09-08 06:27:58,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:27:58" (1/1) ... [2019-09-08 06:27:58,320 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:27:58,336 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:27:58,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:27:58,536 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:27:58,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:27:58,564 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:27:58,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:58 WrapperNode [2019-09-08 06:27:58,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:27:58,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:27:58,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:27:58,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:27:58,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:58" (1/1) ... [2019-09-08 06:27:58,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:58" (1/1) ... [2019-09-08 06:27:58,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:58" (1/1) ... [2019-09-08 06:27:58,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:58" (1/1) ... [2019-09-08 06:27:58,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:58" (1/1) ... [2019-09-08 06:27:58,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:58" (1/1) ... [2019-09-08 06:27:58,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:58" (1/1) ... [2019-09-08 06:27:58,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:27:58,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:27:58,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:27:58,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:27:58,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:58" (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 06:27:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:27:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:27:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-09-08 06:27:58,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:27:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-08 06:27:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:27:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-09-08 06:27:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:27:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:27:58,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:27:58,901 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:27:58,902 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:27:58,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:27:58 BoogieIcfgContainer [2019-09-08 06:27:58,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:27:58,904 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:27:58,904 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:27:58,908 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:27:58,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:27:58" (1/3) ... [2019-09-08 06:27:58,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da8ecc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:27:58, skipping insertion in model container [2019-09-08 06:27:58,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:27:58" (2/3) ... [2019-09-08 06:27:58,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1da8ecc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:27:58, skipping insertion in model container [2019-09-08 06:27:58,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:27:58" (3/3) ... [2019-09-08 06:27:58,912 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o100.c [2019-09-08 06:27:58,923 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:27:58,931 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:27:58,948 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:27:58,981 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:27:58,982 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:27:58,982 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:27:58,982 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:27:58,982 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:27:58,982 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:27:58,983 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:27:58,983 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:27:58,983 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:27:58,999 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-08 06:27:59,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:27:59,005 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:59,006 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:59,007 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:59,013 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2019-09-08 06:27:59,015 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:59,015 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:59,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:59,056 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:59,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:59,291 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 06:27:59,298 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:27:59,299 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:27:59,310 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:27:59,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:27:59,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:59,345 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2019-09-08 06:27:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:59,414 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2019-09-08 06:27:59,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:27:59,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:27:59,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:59,431 INFO L225 Difference]: With dead ends: 32 [2019-09-08 06:27:59,434 INFO L226 Difference]: Without dead ends: 18 [2019-09-08 06:27:59,440 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:27:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-08 06:27:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-08 06:27:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-08 06:27:59,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-08 06:27:59,497 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-08 06:27:59,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:59,497 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-08 06:27:59,497 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:27:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-08 06:27:59,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-08 06:27:59,500 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:59,500 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 06:27:59,501 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:59,501 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2019-09-08 06:27:59,502 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:59,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:59,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:59,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:59,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:59,664 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 06:27:59,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:59,665 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 06:27:59,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:59,712 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:27:59,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:59,785 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 06:27:59,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:59,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-08 06:27:59,793 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-08 06:27:59,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-08 06:27:59,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:27:59,798 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2019-09-08 06:27:59,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:59,860 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-09-08 06:27:59,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:27:59,861 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-09-08 06:27:59,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:59,862 INFO L225 Difference]: With dead ends: 25 [2019-09-08 06:27:59,863 INFO L226 Difference]: Without dead ends: 21 [2019-09-08 06:27:59,865 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-08 06:27:59,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-08 06:27:59,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-08 06:27:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-08 06:27:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-08 06:27:59,878 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2019-09-08 06:27:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:59,880 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-08 06:27:59,880 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-08 06:27:59,880 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-08 06:27:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-08 06:27:59,882 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:59,882 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 06:27:59,882 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:59,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:59,883 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2019-09-08 06:27:59,884 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:59,884 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:59,886 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:59,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:59,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:00,072 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 06:28:00,073 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:00,073 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:28:00,093 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:28:00,111 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:28:00,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:28:00,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-08 06:28:00,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:00,161 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 06:28:00,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:00,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-08 06:28:00,167 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 06:28:00,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 06:28:00,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:28:00,169 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2019-09-08 06:28:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:00,244 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2019-09-08 06:28:00,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-08 06:28:00,246 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2019-09-08 06:28:00,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:00,248 INFO L225 Difference]: With dead ends: 28 [2019-09-08 06:28:00,248 INFO L226 Difference]: Without dead ends: 24 [2019-09-08 06:28:00,249 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:28:00,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-08 06:28:00,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-08 06:28:00,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-08 06:28:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-09-08 06:28:00,256 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2019-09-08 06:28:00,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:00,256 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-09-08 06:28:00,257 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 06:28:00,257 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-09-08 06:28:00,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-08 06:28:00,258 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:00,258 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 06:28:00,259 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:00,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:00,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2019-09-08 06:28:00,259 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:00,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:00,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:00,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:28:00,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:00,556 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 06:28:00,556 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:00,556 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 06:28:00,576 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 06:28:00,601 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-08 06:28:00,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:28:00,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-08 06:28:00,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:00,656 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 06:28:00,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:00,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-08 06:28:00,661 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:28:00,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:28:00,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:28:00,662 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 12 states. [2019-09-08 06:28:00,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:00,728 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2019-09-08 06:28:00,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:28:00,728 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2019-09-08 06:28:00,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:00,730 INFO L225 Difference]: With dead ends: 31 [2019-09-08 06:28:00,730 INFO L226 Difference]: Without dead ends: 27 [2019-09-08 06:28:00,731 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:28:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-08 06:28:00,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-08 06:28:00,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-08 06:28:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-09-08 06:28:00,737 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2019-09-08 06:28:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:00,738 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-09-08 06:28:00,738 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:28:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-09-08 06:28:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-08 06:28:00,740 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:00,740 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 06:28:00,740 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:00,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2019-09-08 06:28:00,741 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:00,741 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:00,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:00,742 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:28:00,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:01,001 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 06:28:01,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:01,002 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:28:01,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:28:01,044 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:28:01,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:28:01,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-08 06:28:01,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:01,089 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 06:28:01,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:01,094 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-08 06:28:01,094 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:28:01,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:28:01,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:28:01,095 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 14 states. [2019-09-08 06:28:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:01,182 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2019-09-08 06:28:01,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 06:28:01,183 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2019-09-08 06:28:01,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:01,184 INFO L225 Difference]: With dead ends: 34 [2019-09-08 06:28:01,184 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 06:28:01,185 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:28:01,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 06:28:01,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 06:28:01,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:28:01,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-09-08 06:28:01,194 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2019-09-08 06:28:01,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:01,194 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-09-08 06:28:01,195 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:28:01,195 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-09-08 06:28:01,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-08 06:28:01,196 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:01,196 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 06:28:01,197 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:01,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:01,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2019-09-08 06:28:01,197 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:01,197 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:01,198 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:01,198 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:28:01,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:01,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:01,477 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 06:28:01,477 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:01,477 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:28:01,505 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:28:01,573 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-08 06:28:01,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:28:01,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-08 06:28:01,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:01,647 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 06:28:01,653 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:01,653 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-08 06:28:01,653 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 06:28:01,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 06:28:01,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:28:01,662 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 16 states. [2019-09-08 06:28:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:01,782 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2019-09-08 06:28:01,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-08 06:28:01,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2019-09-08 06:28:01,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:01,784 INFO L225 Difference]: With dead ends: 37 [2019-09-08 06:28:01,784 INFO L226 Difference]: Without dead ends: 33 [2019-09-08 06:28:01,785 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:28:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-08 06:28:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-08 06:28:01,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-08 06:28:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-09-08 06:28:01,791 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2019-09-08 06:28:01,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:01,792 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-09-08 06:28:01,792 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 06:28:01,792 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-09-08 06:28:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-08 06:28:01,793 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:01,793 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 06:28:01,794 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:01,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:01,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2019-09-08 06:28:01,794 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:01,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:01,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:01,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:28:01,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:02,084 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 06:28:02,086 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:02,086 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:28:02,111 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:28:02,159 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-08 06:28:02,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:28:02,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-08 06:28:02,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:02,218 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 06:28:02,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:02,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-08 06:28:02,225 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:28:02,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:28:02,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:28:02,226 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 18 states. [2019-09-08 06:28:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:02,364 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2019-09-08 06:28:02,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-08 06:28:02,365 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2019-09-08 06:28:02,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:02,366 INFO L225 Difference]: With dead ends: 40 [2019-09-08 06:28:02,366 INFO L226 Difference]: Without dead ends: 36 [2019-09-08 06:28:02,367 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:28:02,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-08 06:28:02,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-08 06:28:02,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-08 06:28:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2019-09-08 06:28:02,373 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2019-09-08 06:28:02,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:02,374 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2019-09-08 06:28:02,374 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:28:02,374 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2019-09-08 06:28:02,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-08 06:28:02,375 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:02,375 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 06:28:02,376 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:02,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:02,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2019-09-08 06:28:02,376 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:02,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:02,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:02,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:28:02,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:02,714 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 06:28:02,714 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:02,715 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:28:02,736 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:28:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:02,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-08 06:28:02,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:02,821 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 06:28:02,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:02,826 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-08 06:28:02,826 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 06:28:02,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 06:28:02,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:28:02,827 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 20 states. [2019-09-08 06:28:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:02,973 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2019-09-08 06:28:02,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 06:28:02,974 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2019-09-08 06:28:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:02,976 INFO L225 Difference]: With dead ends: 43 [2019-09-08 06:28:02,976 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:28:02,978 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:28:02,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:28:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 06:28:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:28:02,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2019-09-08 06:28:02,990 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2019-09-08 06:28:02,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:02,993 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2019-09-08 06:28:02,993 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 06:28:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2019-09-08 06:28:02,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-08 06:28:02,999 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:03,000 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 06:28:03,000 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:03,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:03,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2019-09-08 06:28:03,001 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:03,001 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:03,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:03,002 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:28:03,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:03,419 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 06:28:03,420 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:03,420 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:28:03,446 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:28:03,469 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:28:03,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:28:03,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 40 conjunts are in the unsatisfiable core [2019-09-08 06:28:03,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:03,525 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 06:28:03,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:03,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-08 06:28:03,533 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-08 06:28:03,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-08 06:28:03,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2019-09-08 06:28:03,535 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 22 states. [2019-09-08 06:28:03,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:03,724 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2019-09-08 06:28:03,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-08 06:28:03,724 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2019-09-08 06:28:03,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:03,726 INFO L225 Difference]: With dead ends: 46 [2019-09-08 06:28:03,726 INFO L226 Difference]: Without dead ends: 42 [2019-09-08 06:28:03,727 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2019-09-08 06:28:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-08 06:28:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-08 06:28:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-08 06:28:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-09-08 06:28:03,733 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2019-09-08 06:28:03,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:03,733 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-09-08 06:28:03,733 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-08 06:28:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-09-08 06:28:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-08 06:28:03,734 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:03,735 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 06:28:03,735 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:03,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:03,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2019-09-08 06:28:03,735 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:03,736 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:03,736 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:03,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:28:03,737 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:04,142 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 06:28:04,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:04,142 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) [2019-09-08 06:28:04,163 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:28:04,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-08 06:28:04,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:28:04,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 44 conjunts are in the unsatisfiable core [2019-09-08 06:28:04,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:28:04,315 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:04,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-08 06:28:04,320 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-08 06:28:04,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-08 06:28:04,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:28:04,322 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 24 states. [2019-09-08 06:28:04,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:04,566 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2019-09-08 06:28:04,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-08 06:28:04,567 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2019-09-08 06:28:04,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:04,568 INFO L225 Difference]: With dead ends: 49 [2019-09-08 06:28:04,569 INFO L226 Difference]: Without dead ends: 45 [2019-09-08 06:28:04,573 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2019-09-08 06:28:04,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-08 06:28:04,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-08 06:28:04,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-08 06:28:04,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-09-08 06:28:04,582 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2019-09-08 06:28:04,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:04,583 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-09-08 06:28:04,583 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-08 06:28:04,583 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-09-08 06:28:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-08 06:28:04,586 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:04,589 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 06:28:04,589 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:04,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:04,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2019-09-08 06:28:04,590 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:04,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:04,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:04,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:28:04,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:05,110 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 06:28:05,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:05,111 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:28:05,122 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:28:05,160 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:28:05,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:28:05,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-08 06:28:05,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:05,225 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 06:28:05,232 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:05,233 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-08 06:28:05,233 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-08 06:28:05,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-08 06:28:05,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2019-09-08 06:28:05,234 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 26 states. [2019-09-08 06:28:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:05,511 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2019-09-08 06:28:05,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-08 06:28:05,511 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 73 [2019-09-08 06:28:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:05,512 INFO L225 Difference]: With dead ends: 52 [2019-09-08 06:28:05,512 INFO L226 Difference]: Without dead ends: 48 [2019-09-08 06:28:05,513 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2019-09-08 06:28:05,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-08 06:28:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-08 06:28:05,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-08 06:28:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-09-08 06:28:05,520 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2019-09-08 06:28:05,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:05,521 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-09-08 06:28:05,524 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-08 06:28:05,524 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-09-08 06:28:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-08 06:28:05,525 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:05,525 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 06:28:05,525 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:05,526 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2019-09-08 06:28:05,526 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:05,526 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:05,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:05,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:28:05,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:05,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:06,019 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 06:28:06,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:06,020 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 06:28:06,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:28:26,762 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-08 06:28:26,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:28:26,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 52 conjunts are in the unsatisfiable core [2019-09-08 06:28:26,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:28:26,939 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 06:28:26,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:28:26,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-08 06:28:26,950 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-08 06:28:26,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-08 06:28:26,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:28:26,951 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 28 states. [2019-09-08 06:28:27,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:28:27,251 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2019-09-08 06:28:27,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-08 06:28:27,251 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2019-09-08 06:28:27,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:28:27,252 INFO L225 Difference]: With dead ends: 55 [2019-09-08 06:28:27,252 INFO L226 Difference]: Without dead ends: 51 [2019-09-08 06:28:27,256 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2019-09-08 06:28:27,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-08 06:28:27,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-08 06:28:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-08 06:28:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2019-09-08 06:28:27,268 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2019-09-08 06:28:27,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:28:27,269 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2019-09-08 06:28:27,269 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-08 06:28:27,269 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2019-09-08 06:28:27,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-08 06:28:27,270 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:28:27,270 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 06:28:27,270 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:28:27,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:28:27,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2019-09-08 06:28:27,271 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:28:27,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:28:27,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:27,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:28:27,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:28:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:28:27,926 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 06:28:27,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:28:27,927 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 06:28:27,938 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:29:23,900 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-08 06:29:23,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:29:24,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 56 conjunts are in the unsatisfiable core [2019-09-08 06:29:24,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:29:24,502 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 06:29:24,509 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:29:24,509 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-09-08 06:29:24,509 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-08 06:29:24,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-08 06:29:24,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2019-09-08 06:29:24,511 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 30 states. [2019-09-08 06:29:24,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:29:24,889 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2019-09-08 06:29:24,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-08 06:29:24,889 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2019-09-08 06:29:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:29:24,891 INFO L225 Difference]: With dead ends: 58 [2019-09-08 06:29:24,891 INFO L226 Difference]: Without dead ends: 54 [2019-09-08 06:29:24,892 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2019-09-08 06:29:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-08 06:29:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-08 06:29:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-08 06:29:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2019-09-08 06:29:24,906 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2019-09-08 06:29:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:29:24,908 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2019-09-08 06:29:24,908 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-08 06:29:24,908 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2019-09-08 06:29:24,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-08 06:29:24,909 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:29:24,909 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 06:29:24,910 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:29:24,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:29:24,910 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2019-09-08 06:29:24,910 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:29:24,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:29:24,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:29:24,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:29:24,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:29:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:29:25,505 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 06:29:25,506 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:29:25,506 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 06:29:25,516 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:29:25,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:29:25,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 60 conjunts are in the unsatisfiable core [2019-09-08 06:29:25,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:29:25,609 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 06:29:25,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:29:25,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-09-08 06:29:25,614 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-08 06:29:25,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-08 06:29:25,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2019-09-08 06:29:25,615 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 32 states. [2019-09-08 06:29:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:29:26,043 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2019-09-08 06:29:26,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-08 06:29:26,044 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 91 [2019-09-08 06:29:26,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:29:26,046 INFO L225 Difference]: With dead ends: 61 [2019-09-08 06:29:26,046 INFO L226 Difference]: Without dead ends: 57 [2019-09-08 06:29:26,048 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2019-09-08 06:29:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-08 06:29:26,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-09-08 06:29:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-08 06:29:26,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2019-09-08 06:29:26,054 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2019-09-08 06:29:26,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:29:26,054 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2019-09-08 06:29:26,054 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-08 06:29:26,054 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2019-09-08 06:29:26,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-08 06:29:26,055 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:29:26,056 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 06:29:26,056 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:29:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:29:26,056 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2019-09-08 06:29:26,056 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:29:26,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:29:26,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:29:26,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:29:26,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:29:26,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:29:26,703 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 06:29:26,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:29:26,703 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 06:29:26,714 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:29:26,744 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:29:26,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:29:26,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 64 conjunts are in the unsatisfiable core [2019-09-08 06:29:26,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:29:26,815 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 06:29:26,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:29:26,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2019-09-08 06:29:26,819 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-08 06:29:26,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-08 06:29:26,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 06:29:26,820 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 34 states. [2019-09-08 06:29:27,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:29:27,302 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2019-09-08 06:29:27,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-08 06:29:27,303 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2019-09-08 06:29:27,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:29:27,304 INFO L225 Difference]: With dead ends: 64 [2019-09-08 06:29:27,305 INFO L226 Difference]: Without dead ends: 60 [2019-09-08 06:29:27,306 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 06:29:27,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-08 06:29:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-08 06:29:27,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:29:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2019-09-08 06:29:27,313 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2019-09-08 06:29:27,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:29:27,313 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2019-09-08 06:29:27,313 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-08 06:29:27,314 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2019-09-08 06:29:27,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-08 06:29:27,315 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:29:27,315 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 06:29:27,315 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:29:27,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:29:27,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2019-09-08 06:29:27,316 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:29:27,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:29:27,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:29:27,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:29:27,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:29:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:29:28,025 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 06:29:28,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:29:28,026 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:29:28,038 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:29:30,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-08 06:29:30,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:29:30,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 68 conjunts are in the unsatisfiable core [2019-09-08 06:29:30,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:29:30,964 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 06:29:30,971 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:29:30,971 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-09-08 06:29:30,973 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-08 06:29:30,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-08 06:29:30,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 06:29:30,974 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 36 states. [2019-09-08 06:29:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:29:31,524 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2019-09-08 06:29:31,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-08 06:29:31,525 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 103 [2019-09-08 06:29:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:29:31,527 INFO L225 Difference]: With dead ends: 67 [2019-09-08 06:29:31,527 INFO L226 Difference]: Without dead ends: 63 [2019-09-08 06:29:31,528 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 06:29:31,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-08 06:29:31,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-08 06:29:31,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-08 06:29:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2019-09-08 06:29:31,533 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2019-09-08 06:29:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:29:31,533 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2019-09-08 06:29:31,534 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-08 06:29:31,534 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2019-09-08 06:29:31,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-08 06:29:31,535 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:29:31,535 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 06:29:31,535 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:29:31,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:29:31,536 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2019-09-08 06:29:31,536 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:29:31,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:29:31,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:29:31,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:29:31,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:29:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:29:32,513 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 06:29:32,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:29:32,514 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 06:29:32,525 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:29:32,561 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:29:32,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:29:32,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 72 conjunts are in the unsatisfiable core [2019-09-08 06:29:32,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:29:32,657 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 06:29:32,671 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:29:32,671 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-09-08 06:29:32,672 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-08 06:29:32,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-08 06:29:32,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 06:29:32,676 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 38 states. [2019-09-08 06:29:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:29:33,278 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2019-09-08 06:29:33,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-08 06:29:33,279 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 109 [2019-09-08 06:29:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:29:33,280 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:29:33,280 INFO L226 Difference]: Without dead ends: 66 [2019-09-08 06:29:33,281 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2019-09-08 06:29:33,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-08 06:29:33,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-09-08 06:29:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-08 06:29:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2019-09-08 06:29:33,298 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2019-09-08 06:29:33,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:29:33,298 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2019-09-08 06:29:33,298 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-08 06:29:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2019-09-08 06:29:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-08 06:29:33,301 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:29:33,301 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 06:29:33,303 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:29:33,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:29:33,304 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2019-09-08 06:29:33,304 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:29:33,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:29:33,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:29:33,305 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:29:33,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:29:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:29:34,200 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 06:29:34,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:29:34,201 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 06:29:34,215 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:31:02,997 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-08 06:31:02,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:31:06,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 76 conjunts are in the unsatisfiable core [2019-09-08 06:31:06,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:31:06,475 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 06:31:06,482 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:31:06,482 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2019-09-08 06:31:06,483 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-08 06:31:06,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-08 06:31:06,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2019-09-08 06:31:06,484 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 40 states. [2019-09-08 06:31:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:31:07,201 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2019-09-08 06:31:07,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-08 06:31:07,202 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 115 [2019-09-08 06:31:07,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:31:07,203 INFO L225 Difference]: With dead ends: 73 [2019-09-08 06:31:07,203 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:31:07,204 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2019-09-08 06:31:07,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:31:07,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-09-08 06:31:07,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-08 06:31:07,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2019-09-08 06:31:07,219 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2019-09-08 06:31:07,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:31:07,219 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2019-09-08 06:31:07,219 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-08 06:31:07,220 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2019-09-08 06:31:07,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-08 06:31:07,220 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:31:07,221 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 06:31:07,221 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:31:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:31:07,221 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2019-09-08 06:31:07,221 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:31:07,221 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:31:07,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:31:07,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:31:07,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:31:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:31:08,129 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 06:31:08,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:31:08,130 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 06:31:08,139 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:31:50,613 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-08 06:31:50,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:31:50,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 80 conjunts are in the unsatisfiable core [2019-09-08 06:31:50,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:31:50,789 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 06:31:50,798 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:31:50,798 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-09-08 06:31:50,799 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-08 06:31:50,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-08 06:31:50,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 06:31:50,800 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 42 states. [2019-09-08 06:31:51,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:31:51,538 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2019-09-08 06:31:51,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-08 06:31:51,539 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 121 [2019-09-08 06:31:51,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:31:51,541 INFO L225 Difference]: With dead ends: 76 [2019-09-08 06:31:51,541 INFO L226 Difference]: Without dead ends: 72 [2019-09-08 06:31:51,542 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2019-09-08 06:31:51,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-08 06:31:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-09-08 06:31:51,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-08 06:31:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2019-09-08 06:31:51,546 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2019-09-08 06:31:51,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:31:51,547 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2019-09-08 06:31:51,547 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-08 06:31:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2019-09-08 06:31:51,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-08 06:31:51,548 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:31:51,548 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 06:31:51,549 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:31:51,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:31:51,549 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2019-09-08 06:31:51,549 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:31:51,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:31:51,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:31:51,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:31:51,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:31:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:31:52,723 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 06:31:52,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:31:52,724 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 06:31:52,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:31:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:31:52,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 84 conjunts are in the unsatisfiable core [2019-09-08 06:31:52,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:31:52,857 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 06:31:52,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:31:52,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2019-09-08 06:31:52,862 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-08 06:31:52,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-08 06:31:52,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2019-09-08 06:31:52,863 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 44 states. [2019-09-08 06:31:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:31:53,715 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2019-09-08 06:31:53,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-08 06:31:53,716 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 127 [2019-09-08 06:31:53,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:31:53,718 INFO L225 Difference]: With dead ends: 79 [2019-09-08 06:31:53,719 INFO L226 Difference]: Without dead ends: 75 [2019-09-08 06:31:53,720 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2019-09-08 06:31:53,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-08 06:31:53,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-09-08 06:31:53,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-08 06:31:53,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2019-09-08 06:31:53,724 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2019-09-08 06:31:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:31:53,725 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2019-09-08 06:31:53,725 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-08 06:31:53,725 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2019-09-08 06:31:53,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-09-08 06:31:53,726 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:31:53,726 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 06:31:53,726 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:31:53,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:31:53,727 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2019-09-08 06:31:53,727 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:31:53,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:31:53,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:31:53,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:31:53,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:31:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:31:54,897 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 06:31:54,897 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:31:54,897 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 06:31:54,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:31:54,952 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:31:54,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:31:54,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 88 conjunts are in the unsatisfiable core [2019-09-08 06:31:54,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:31:55,038 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 06:31:55,042 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:31:55,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2019-09-08 06:31:55,043 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-08 06:31:55,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-08 06:31:55,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2019-09-08 06:31:55,044 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 46 states. [2019-09-08 06:31:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:31:55,953 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2019-09-08 06:31:55,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-08 06:31:55,954 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 133 [2019-09-08 06:31:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:31:55,956 INFO L225 Difference]: With dead ends: 82 [2019-09-08 06:31:55,956 INFO L226 Difference]: Without dead ends: 78 [2019-09-08 06:31:55,957 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2019-09-08 06:31:55,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-08 06:31:55,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-08 06:31:55,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-08 06:31:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2019-09-08 06:31:55,962 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2019-09-08 06:31:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:31:55,963 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2019-09-08 06:31:55,963 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-08 06:31:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2019-09-08 06:31:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-08 06:31:55,964 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:31:55,964 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 06:31:55,965 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:31:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:31:55,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2019-09-08 06:31:55,965 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:31:55,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:31:55,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:31:55,966 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:31:55,966 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:31:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:31:57,193 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 06:31:57,194 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:31:57,194 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) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:31:57,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:33:42,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-08 06:33:42,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:33:42,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 92 conjunts are in the unsatisfiable core [2019-09-08 06:33:42,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:33:43,035 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 06:33:43,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:33:43,044 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2019-09-08 06:33:43,044 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-08 06:33:43,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-08 06:33:43,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2019-09-08 06:33:43,045 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 48 states. [2019-09-08 06:33:44,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:33:44,071 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2019-09-08 06:33:44,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-08 06:33:44,073 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 139 [2019-09-08 06:33:44,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:33:44,075 INFO L225 Difference]: With dead ends: 85 [2019-09-08 06:33:44,075 INFO L226 Difference]: Without dead ends: 81 [2019-09-08 06:33:44,077 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2019-09-08 06:33:44,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-08 06:33:44,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-09-08 06:33:44,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-08 06:33:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2019-09-08 06:33:44,088 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2019-09-08 06:33:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:33:44,089 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2019-09-08 06:33:44,089 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-08 06:33:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2019-09-08 06:33:44,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-08 06:33:44,092 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:33:44,092 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 06:33:44,092 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:33:44,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:33:44,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2019-09-08 06:33:44,093 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:33:44,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:33:44,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:33:44,094 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:33:44,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:33:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:33:45,303 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 06:33:45,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:33:45,303 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) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:33:45,317 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:33:45,364 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:33:45,364 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:33:45,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 96 conjunts are in the unsatisfiable core [2019-09-08 06:33:45,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:33:45,466 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 06:33:45,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:33:45,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2019-09-08 06:33:45,472 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-08 06:33:45,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-08 06:33:45,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2019-09-08 06:33:45,474 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 50 states. [2019-09-08 06:33:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:33:46,551 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2019-09-08 06:33:46,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-08 06:33:46,552 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 145 [2019-09-08 06:33:46,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:33:46,554 INFO L225 Difference]: With dead ends: 88 [2019-09-08 06:33:46,554 INFO L226 Difference]: Without dead ends: 84 [2019-09-08 06:33:46,556 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2019-09-08 06:33:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-08 06:33:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-08 06:33:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-08 06:33:46,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2019-09-08 06:33:46,560 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2019-09-08 06:33:46,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:33:46,561 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2019-09-08 06:33:46,561 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-08 06:33:46,561 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2019-09-08 06:33:46,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-09-08 06:33:46,562 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:33:46,562 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 06:33:46,562 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:33:46,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:33:46,563 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2019-09-08 06:33:46,563 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:33:46,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:33:46,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:33:46,564 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:33:46,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:33:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:33:48,046 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 06:33:48,047 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:33:48,047 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 06:33:48,059 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:37:08,576 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-08 06:37:08,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:37:09,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 100 conjunts are in the unsatisfiable core [2019-09-08 06:37:09,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:37:09,366 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 06:37:09,373 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:37:09,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2019-09-08 06:37:09,374 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-08 06:37:09,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-08 06:37:09,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2019-09-08 06:37:09,375 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 52 states. [2019-09-08 06:37:10,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:37:10,506 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2019-09-08 06:37:10,507 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-08 06:37:10,507 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 151 [2019-09-08 06:37:10,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:37:10,509 INFO L225 Difference]: With dead ends: 91 [2019-09-08 06:37:10,509 INFO L226 Difference]: Without dead ends: 87 [2019-09-08 06:37:10,511 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2019-09-08 06:37:10,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-08 06:37:10,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-09-08 06:37:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-08 06:37:10,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2019-09-08 06:37:10,516 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2019-09-08 06:37:10,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:37:10,516 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2019-09-08 06:37:10,516 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-08 06:37:10,517 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2019-09-08 06:37:10,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-09-08 06:37:10,518 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:37:10,518 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 06:37:10,518 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:37:10,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:37:10,519 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2019-09-08 06:37:10,519 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:37:10,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:37:10,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:37:10,520 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:37:10,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:37:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:37:11,932 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 06:37:11,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:37:11,933 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 06:37:11,943 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-08 06:39:40,711 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-08 06:39:40,712 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:39:40,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 104 conjunts are in the unsatisfiable core [2019-09-08 06:39:40,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:39:40,843 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 06:39:40,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:39:40,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2019-09-08 06:39:40,852 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-08 06:39:40,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-08 06:39:40,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2019-09-08 06:39:40,853 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 54 states. [2019-09-08 06:39:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:39:42,045 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2019-09-08 06:39:42,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-08 06:39:42,045 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 157 [2019-09-08 06:39:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:39:42,047 INFO L225 Difference]: With dead ends: 94 [2019-09-08 06:39:42,048 INFO L226 Difference]: Without dead ends: 90 [2019-09-08 06:39:42,049 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2019-09-08 06:39:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-08 06:39:42,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-09-08 06:39:42,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-08 06:39:42,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2019-09-08 06:39:42,053 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2019-09-08 06:39:42,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:39:42,054 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2019-09-08 06:39:42,054 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-08 06:39:42,054 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2019-09-08 06:39:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-08 06:39:42,055 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:39:42,055 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 06:39:42,055 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:39:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:39:42,056 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2019-09-08 06:39:42,056 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:39:42,056 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:39:42,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:39:42,057 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:39:42,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:39:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:39:43,628 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 06:39:43,628 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:39:43,628 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 06:39:43,639 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:39:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:39:43,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 108 conjunts are in the unsatisfiable core [2019-09-08 06:39:43,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:39:43,800 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 06:39:43,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:39:43,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2019-09-08 06:39:43,804 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-08 06:39:43,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-08 06:39:43,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2019-09-08 06:39:43,805 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 56 states. [2019-09-08 06:39:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:39:45,152 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2019-09-08 06:39:45,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-08 06:39:45,156 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 163 [2019-09-08 06:39:45,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:39:45,157 INFO L225 Difference]: With dead ends: 97 [2019-09-08 06:39:45,157 INFO L226 Difference]: Without dead ends: 93 [2019-09-08 06:39:45,159 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2019-09-08 06:39:45,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-08 06:39:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-08 06:39:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-08 06:39:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2019-09-08 06:39:45,163 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2019-09-08 06:39:45,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:39:45,164 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2019-09-08 06:39:45,164 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-08 06:39:45,164 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2019-09-08 06:39:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-09-08 06:39:45,165 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:39:45,165 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 06:39:45,166 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:39:45,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:39:45,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2019-09-08 06:39:45,166 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:39:45,166 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:39:45,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:39:45,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:39:45,167 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:39:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:39:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2019-09-08 06:39:46,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:39:46,793 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 06:39:46,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:39:46,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:39:46,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:39:46,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 112 conjunts are in the unsatisfiable core [2019-09-08 06:39:46,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:39:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (27)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:39:47,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:39:47,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2019-09-08 06:39:47,002 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-09-08 06:39:47,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-09-08 06:39:47,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2019-09-08 06:39:47,006 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 58 states. [2019-09-08 06:39:48,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:39:48,501 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2019-09-08 06:39:48,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-09-08 06:39:48,502 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 169 [2019-09-08 06:39:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:39:48,503 INFO L225 Difference]: With dead ends: 100 [2019-09-08 06:39:48,504 INFO L226 Difference]: Without dead ends: 96 [2019-09-08 06:39:48,506 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2019-09-08 06:39:48,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-08 06:39:48,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-09-08 06:39:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-08 06:39:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2019-09-08 06:39:48,515 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 169 [2019-09-08 06:39:48,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:39:48,516 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2019-09-08 06:39:48,516 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-09-08 06:39:48,516 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2019-09-08 06:39:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-09-08 06:39:48,517 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:39:48,517 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:39:48,517 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:39:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:39:48,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1625096943, now seen corresponding path program 27 times [2019-09-08 06:39:48,518 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:39:48,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:39:48,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:39:48,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:39:48,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:39:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:39:50,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2019-09-08 06:39:50,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:39:50,565 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:39:50,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2