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/bitvector/soft_float_3.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 12:53:59,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 12:53:59,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 12:53:59,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 12:53:59,374 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 12:53:59,375 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 12:53:59,377 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 12:53:59,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 12:53:59,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 12:53:59,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 12:53:59,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 12:53:59,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 12:53:59,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 12:53:59,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 12:53:59,385 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 12:53:59,387 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 12:53:59,387 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 12:53:59,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 12:53:59,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 12:53:59,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 12:53:59,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 12:53:59,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 12:53:59,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 12:53:59,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 12:53:59,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-07 12:53:59,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-07 12:53:59,399 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-07 12:53:59,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-07 12:53:59,400 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-07 12:53:59,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-07 12:53:59,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 12:53:59,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 12:53:59,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 12:53:59,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 12:53:59,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 12:53:59,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 12:53:59,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 12:53:59,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 12:53:59,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 12:53:59,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 12:53:59,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 12:53:59,408 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 [2019-09-07 12:53:59,422 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 12:53:59,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 12:53:59,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 12:53:59,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 12:53:59,424 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 12:53:59,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 12:53:59,424 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 12:53:59,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 12:53:59,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 12:53:59,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 12:53:59,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 12:53:59,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 12:53:59,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 12:53:59,426 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 12:53:59,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 12:53:59,427 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 12:53:59,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 12:53:59,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 12:53:59,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 12:53:59,428 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 12:53:59,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 12:53:59,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 12:53:59,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 12:53:59,428 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 12:53:59,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 12:53:59,429 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 12:53:59,429 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 12:53:59,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 12:53:59,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 12:53:59,464 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 12:53:59,476 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 12:53:59,480 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 12:53:59,482 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 12:53:59,483 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 12:53:59,484 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_3.c.cil.c [2019-09-07 12:53:59,554 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8ea2ace6/040fdf70933943efa66ee3a00db504ad/FLAG161f753c1 [2019-09-07 12:53:59,989 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 12:53:59,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/soft_float_3.c.cil.c [2019-09-07 12:54:00,002 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8ea2ace6/040fdf70933943efa66ee3a00db504ad/FLAG161f753c1 [2019-09-07 12:54:00,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8ea2ace6/040fdf70933943efa66ee3a00db504ad [2019-09-07 12:54:00,329 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 12:54:00,330 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 12:54:00,331 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 12:54:00,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 12:54:00,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 12:54:00,336 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:54:00" (1/1) ... [2019-09-07 12:54:00,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7abe9483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:54:00, skipping insertion in model container [2019-09-07 12:54:00,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 12:54:00" (1/1) ... [2019-09-07 12:54:00,344 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 12:54:00,369 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 12:54:00,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:54:00,567 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 12:54:00,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 12:54:00,725 INFO L192 MainTranslator]: Completed translation [2019-09-07 12:54:00,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:54:00 WrapperNode [2019-09-07 12:54:00,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 12:54:00,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 12:54:00,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 12:54:00,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 12:54:00,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:54:00" (1/1) ... [2019-09-07 12:54:00,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:54:00" (1/1) ... [2019-09-07 12:54:00,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:54:00" (1/1) ... [2019-09-07 12:54:00,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:54:00" (1/1) ... [2019-09-07 12:54:00,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:54:00" (1/1) ... [2019-09-07 12:54:00,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:54:00" (1/1) ... [2019-09-07 12:54:00,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:54:00" (1/1) ... [2019-09-07 12:54:00,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 12:54:00,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 12:54:00,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 12:54:00,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 12:54:00,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:54:00" (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 [2019-09-07 12:54:00,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 12:54:00,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 12:54:00,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 12:54:00,823 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2019-09-07 12:54:00,824 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2019-09-07 12:54:00,824 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2019-09-07 12:54:00,824 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 12:54:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 12:54:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-09-07 12:54:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-07 12:54:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 12:54:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2019-09-07 12:54:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2019-09-07 12:54:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2019-09-07 12:54:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 12:54:00,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 12:54:00,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 12:54:01,237 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 12:54:01,237 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-07 12:54:01,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:54:01 BoogieIcfgContainer [2019-09-07 12:54:01,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 12:54:01,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 12:54:01,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 12:54:01,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 12:54:01,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 12:54:00" (1/3) ... [2019-09-07 12:54:01,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67080616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:54:01, skipping insertion in model container [2019-09-07 12:54:01,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 12:54:00" (2/3) ... [2019-09-07 12:54:01,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67080616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 12:54:01, skipping insertion in model container [2019-09-07 12:54:01,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 12:54:01" (3/3) ... [2019-09-07 12:54:01,246 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_3.c.cil.c [2019-09-07 12:54:01,255 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 12:54:01,263 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 12:54:01,278 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 12:54:01,310 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 12:54:01,310 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 12:54:01,310 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 12:54:01,311 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 12:54:01,311 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 12:54:01,311 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 12:54:01,311 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 12:54:01,311 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 12:54:01,311 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 12:54:01,330 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2019-09-07 12:54:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-07 12:54:01,339 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:54:01,340 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:54:01,342 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:54:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:54:01,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1245732312, now seen corresponding path program 1 times [2019-09-07 12:54:01,348 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:54:01,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:54:01,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:01,386 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:01,386 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:01,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-07 12:54:01,569 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 12:54:01,570 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 12:54:01,574 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 12:54:01,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 12:54:01,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:54:01,592 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 3 states. [2019-09-07 12:54:01,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:54:01,655 INFO L93 Difference]: Finished difference Result 116 states and 171 transitions. [2019-09-07 12:54:01,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 12:54:01,660 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2019-09-07 12:54:01,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:54:01,679 INFO L225 Difference]: With dead ends: 116 [2019-09-07 12:54:01,679 INFO L226 Difference]: Without dead ends: 52 [2019-09-07 12:54:01,685 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 12:54:01,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-07 12:54:01,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-07 12:54:01,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-07 12:54:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 70 transitions. [2019-09-07 12:54:01,769 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 70 transitions. Word has length 48 [2019-09-07 12:54:01,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:54:01,771 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 70 transitions. [2019-09-07 12:54:01,772 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 12:54:01,772 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 70 transitions. [2019-09-07 12:54:01,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-07 12:54:01,775 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:54:01,775 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:54:01,776 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:54:01,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:54:01,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2034049724, now seen corresponding path program 1 times [2019-09-07 12:54:01,777 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:54:01,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:54:01,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:01,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:01,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:01,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:54:01,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:54:01,958 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:54:01,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:54:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:02,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 12:54:02,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:54:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 12:54:02,200 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:54:02,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8] total 10 [2019-09-07 12:54:02,201 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 12:54:02,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 12:54:02,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-07 12:54:02,202 INFO L87 Difference]: Start difference. First operand 52 states and 70 transitions. Second operand 10 states. [2019-09-07 12:54:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:54:02,508 INFO L93 Difference]: Finished difference Result 131 states and 188 transitions. [2019-09-07 12:54:02,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 12:54:02,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 50 [2019-09-07 12:54:02,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:54:02,513 INFO L225 Difference]: With dead ends: 131 [2019-09-07 12:54:02,513 INFO L226 Difference]: Without dead ends: 85 [2019-09-07 12:54:02,514 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2019-09-07 12:54:02,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-07 12:54:02,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2019-09-07 12:54:02,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-07 12:54:02,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 96 transitions. [2019-09-07 12:54:02,531 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 96 transitions. Word has length 50 [2019-09-07 12:54:02,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:54:02,532 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 96 transitions. [2019-09-07 12:54:02,532 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 12:54:02,532 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 96 transitions. [2019-09-07 12:54:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-07 12:54:02,534 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:54:02,535 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:54:02,535 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:54:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:54:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash -858182755, now seen corresponding path program 1 times [2019-09-07 12:54:02,535 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:54:02,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:54:02,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:02,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:02,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:02,577 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:54:02,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:54:02,578 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 [2019-09-07 12:54:02,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:02,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:02,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:54:02,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:54:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:54:02,653 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:54:02,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2019-09-07 12:54:02,654 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 12:54:02,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 12:54:02,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:54:02,655 INFO L87 Difference]: Start difference. First operand 70 states and 96 transitions. Second operand 4 states. [2019-09-07 12:54:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:54:02,721 INFO L93 Difference]: Finished difference Result 139 states and 195 transitions. [2019-09-07 12:54:02,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 12:54:02,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-09-07 12:54:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:54:02,727 INFO L225 Difference]: With dead ends: 139 [2019-09-07 12:54:02,727 INFO L226 Difference]: Without dead ends: 79 [2019-09-07 12:54:02,728 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:54:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-07 12:54:02,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2019-09-07 12:54:02,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-07 12:54:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 104 transitions. [2019-09-07 12:54:02,741 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 104 transitions. Word has length 55 [2019-09-07 12:54:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:54:02,742 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 104 transitions. [2019-09-07 12:54:02,742 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 12:54:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 104 transitions. [2019-09-07 12:54:02,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-07 12:54:02,745 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:54:02,745 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:54:02,745 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:54:02,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:54:02,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1697837489, now seen corresponding path program 1 times [2019-09-07 12:54:02,746 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:54:02,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:54:02,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:02,747 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:02,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:54:02,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:54:02,797 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:54:02,815 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:02,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 12:54:02,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:54:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:54:02,876 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:54:02,876 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2019-09-07 12:54:02,877 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 12:54:02,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 12:54:02,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-07 12:54:02,878 INFO L87 Difference]: Start difference. First operand 75 states and 104 transitions. Second operand 4 states. [2019-09-07 12:54:02,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:54:02,929 INFO L93 Difference]: Finished difference Result 150 states and 213 transitions. [2019-09-07 12:54:02,929 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 12:54:02,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2019-09-07 12:54:02,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:54:02,931 INFO L225 Difference]: With dead ends: 150 [2019-09-07 12:54:02,931 INFO L226 Difference]: Without dead ends: 85 [2019-09-07 12:54:02,932 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:54:02,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-07 12:54:02,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2019-09-07 12:54:02,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-07 12:54:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 114 transitions. [2019-09-07 12:54:02,944 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 114 transitions. Word has length 56 [2019-09-07 12:54:02,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:54:02,945 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 114 transitions. [2019-09-07 12:54:02,945 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 12:54:02,945 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 114 transitions. [2019-09-07 12:54:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-07 12:54:02,947 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:54:02,947 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:54:02,948 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:54:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:54:02,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1958652043, now seen corresponding path program 1 times [2019-09-07 12:54:02,948 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:54:02,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:54:02,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:02,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:02,950 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:54:03,041 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:54:03,041 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) [2019-09-07 12:54:03,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:54:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:03,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 12:54:03,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:54:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-07 12:54:03,167 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 12:54:03,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2019-09-07 12:54:03,170 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 12:54:03,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 12:54:03,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-09-07 12:54:03,171 INFO L87 Difference]: Start difference. First operand 81 states and 114 transitions. Second operand 9 states. [2019-09-07 12:54:03,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:54:03,512 INFO L93 Difference]: Finished difference Result 163 states and 232 transitions. [2019-09-07 12:54:03,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 12:54:03,512 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-09-07 12:54:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:54:03,514 INFO L225 Difference]: With dead ends: 163 [2019-09-07 12:54:03,514 INFO L226 Difference]: Without dead ends: 88 [2019-09-07 12:54:03,516 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-07 12:54:03,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-07 12:54:03,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 79. [2019-09-07 12:54:03,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-07 12:54:03,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2019-09-07 12:54:03,538 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 56 [2019-09-07 12:54:03,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:54:03,538 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2019-09-07 12:54:03,538 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 12:54:03,538 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2019-09-07 12:54:03,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-07 12:54:03,540 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:54:03,540 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:54:03,541 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:54:03,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:54:03,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1879117182, now seen corresponding path program 1 times [2019-09-07 12:54:03,544 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:54:03,544 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:54:03,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:03,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:03,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:03,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:54:03,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:54:03,674 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 [2019-09-07 12:54:03,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:03,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 12:54:03,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:54:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 12:54:03,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:54:03,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10] total 12 [2019-09-07 12:54:03,871 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 12:54:03,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 12:54:03,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2019-09-07 12:54:03,872 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 12 states. [2019-09-07 12:54:04,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:54:04,509 INFO L93 Difference]: Finished difference Result 200 states and 288 transitions. [2019-09-07 12:54:04,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 12:54:04,510 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2019-09-07 12:54:04,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:54:04,512 INFO L225 Difference]: With dead ends: 200 [2019-09-07 12:54:04,512 INFO L226 Difference]: Without dead ends: 131 [2019-09-07 12:54:04,513 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2019-09-07 12:54:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-09-07 12:54:04,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2019-09-07 12:54:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-07 12:54:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 129 transitions. [2019-09-07 12:54:04,528 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 129 transitions. Word has length 57 [2019-09-07 12:54:04,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:54:04,528 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 129 transitions. [2019-09-07 12:54:04,529 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 12:54:04,529 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 129 transitions. [2019-09-07 12:54:04,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-07 12:54:04,530 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:54:04,530 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:54:04,530 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:54:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:54:04,531 INFO L82 PathProgramCache]: Analyzing trace with hash 104329778, now seen corresponding path program 1 times [2019-09-07 12:54:04,531 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:54:04,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:54:04,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:04,532 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:04,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:04,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:54:04,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:54:04,573 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 [2019-09-07 12:54:04,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:04,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 12:54:04,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:54:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:54:04,651 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:54:04,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-09-07 12:54:04,651 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 12:54:04,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 12:54:04,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-07 12:54:04,652 INFO L87 Difference]: Start difference. First operand 94 states and 129 transitions. Second operand 5 states. [2019-09-07 12:54:04,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:54:04,730 INFO L93 Difference]: Finished difference Result 187 states and 260 transitions. [2019-09-07 12:54:04,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 12:54:04,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2019-09-07 12:54:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:54:04,735 INFO L225 Difference]: With dead ends: 187 [2019-09-07 12:54:04,737 INFO L226 Difference]: Without dead ends: 103 [2019-09-07 12:54:04,738 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:54:04,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-07 12:54:04,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2019-09-07 12:54:04,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-07 12:54:04,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 132 transitions. [2019-09-07 12:54:04,749 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 132 transitions. Word has length 58 [2019-09-07 12:54:04,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:54:04,750 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 132 transitions. [2019-09-07 12:54:04,750 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 12:54:04,750 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 132 transitions. [2019-09-07 12:54:04,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-07 12:54:04,751 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:54:04,751 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:54:04,752 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:54:04,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:54:04,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1568025327, now seen corresponding path program 1 times [2019-09-07 12:54:04,752 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:54:04,752 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:54:04,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:04,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:04,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:04,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:04,826 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:54:04,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:54:04,827 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) [2019-09-07 12:54:04,844 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 [2019-09-07 12:54:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:04,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 12:54:04,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:54:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-09-07 12:54:04,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:54:04,968 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2019-09-07 12:54:04,968 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 12:54:04,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 12:54:04,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-07 12:54:04,969 INFO L87 Difference]: Start difference. First operand 96 states and 132 transitions. Second operand 11 states. [2019-09-07 12:54:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:54:05,309 INFO L93 Difference]: Finished difference Result 223 states and 312 transitions. [2019-09-07 12:54:05,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 12:54:05,310 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2019-09-07 12:54:05,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:54:05,312 INFO L225 Difference]: With dead ends: 223 [2019-09-07 12:54:05,312 INFO L226 Difference]: Without dead ends: 125 [2019-09-07 12:54:05,313 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-09-07 12:54:05,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-09-07 12:54:05,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 101. [2019-09-07 12:54:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-07 12:54:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2019-09-07 12:54:05,324 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 60 [2019-09-07 12:54:05,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:54:05,325 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2019-09-07 12:54:05,325 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 12:54:05,325 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2019-09-07 12:54:05,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-07 12:54:05,326 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:54:05,327 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:54:05,327 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:54:05,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:54:05,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1168288308, now seen corresponding path program 1 times [2019-09-07 12:54:05,327 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:54:05,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:54:05,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:05,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:05,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:05,385 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:54:05,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:54:05,386 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:54:05,404 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:54:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:05,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 12:54:05,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:54:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:54:05,451 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:54:05,451 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-09-07 12:54:05,452 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 12:54:05,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 12:54:05,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-07 12:54:05,452 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand 6 states. [2019-09-07 12:54:05,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:54:05,551 INFO L93 Difference]: Finished difference Result 208 states and 279 transitions. [2019-09-07 12:54:05,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 12:54:05,552 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2019-09-07 12:54:05,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:54:05,553 INFO L225 Difference]: With dead ends: 208 [2019-09-07 12:54:05,554 INFO L226 Difference]: Without dead ends: 117 [2019-09-07 12:54:05,554 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-09-07 12:54:05,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-09-07 12:54:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2019-09-07 12:54:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-07 12:54:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2019-09-07 12:54:05,564 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 63 [2019-09-07 12:54:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:54:05,565 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2019-09-07 12:54:05,565 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 12:54:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2019-09-07 12:54:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-07 12:54:05,566 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:54:05,566 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:54:05,566 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:54:05,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:54:05,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1115522347, now seen corresponding path program 1 times [2019-09-07 12:54:05,567 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:54:05,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:54:05,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:05,568 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:05,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:54:05,650 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:54:05,650 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:54:05,664 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:05,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 12:54:05,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:54:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:54:06,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:54:06,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-09-07 12:54:06,754 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 12:54:06,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 12:54:06,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=51, Unknown=1, NotChecked=0, Total=72 [2019-09-07 12:54:06,754 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand 9 states. [2019-09-07 12:54:22,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:54:22,873 INFO L93 Difference]: Finished difference Result 230 states and 313 transitions. [2019-09-07 12:54:22,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 12:54:22,874 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2019-09-07 12:54:22,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:54:22,877 INFO L225 Difference]: With dead ends: 230 [2019-09-07 12:54:22,877 INFO L226 Difference]: Without dead ends: 137 [2019-09-07 12:54:22,879 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=43, Invalid=109, Unknown=4, NotChecked=0, Total=156 [2019-09-07 12:54:22,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-09-07 12:54:22,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 104. [2019-09-07 12:54:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-07 12:54:22,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 139 transitions. [2019-09-07 12:54:22,898 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 139 transitions. Word has length 65 [2019-09-07 12:54:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:54:22,899 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 139 transitions. [2019-09-07 12:54:22,899 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 12:54:22,899 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 139 transitions. [2019-09-07 12:54:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-07 12:54:22,906 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:54:22,907 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:54:22,907 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:54:22,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:54:22,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1429884771, now seen corresponding path program 2 times [2019-09-07 12:54:22,907 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:54:22,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:54:22,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:22,910 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:54:22,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:54:22,975 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:54:22,975 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) [2019-09-07 12:54:22,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:54:23,018 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:54:23,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:54:23,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 12:54:23,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:54:23,031 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:54:23,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:54:23,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-07 12:54:23,036 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 12:54:23,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 12:54:23,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-07 12:54:23,037 INFO L87 Difference]: Start difference. First operand 104 states and 139 transitions. Second operand 7 states. [2019-09-07 12:54:23,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:54:23,133 INFO L93 Difference]: Finished difference Result 221 states and 299 transitions. [2019-09-07 12:54:23,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 12:54:23,134 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2019-09-07 12:54:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:54:23,136 INFO L225 Difference]: With dead ends: 221 [2019-09-07 12:54:23,136 INFO L226 Difference]: Without dead ends: 127 [2019-09-07 12:54:23,138 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-09-07 12:54:23,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-09-07 12:54:23,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106. [2019-09-07 12:54:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-07 12:54:23,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 142 transitions. [2019-09-07 12:54:23,154 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 142 transitions. Word has length 66 [2019-09-07 12:54:23,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:54:23,155 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 142 transitions. [2019-09-07 12:54:23,155 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 12:54:23,155 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 142 transitions. [2019-09-07 12:54:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-07 12:54:23,156 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:54:23,157 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:54:23,157 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:54:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:54:23,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1170575428, now seen corresponding path program 2 times [2019-09-07 12:54:23,157 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:54:23,158 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:54:23,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:23,159 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:54:23,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:54:23,267 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:54:23,268 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 [2019-09-07 12:54:23,285 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:54:23,317 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:54:23,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:54:23,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 12:54:23,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:54:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 25 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:54:24,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:54:24,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2019-09-07 12:54:24,462 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 12:54:24,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 12:54:24,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2019-09-07 12:54:24,463 INFO L87 Difference]: Start difference. First operand 106 states and 142 transitions. Second operand 10 states. [2019-09-07 12:54:46,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:54:46,242 INFO L93 Difference]: Finished difference Result 234 states and 319 transitions. [2019-09-07 12:54:46,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 12:54:46,242 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2019-09-07 12:54:46,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:54:46,244 INFO L225 Difference]: With dead ends: 234 [2019-09-07 12:54:46,244 INFO L226 Difference]: Without dead ends: 138 [2019-09-07 12:54:46,245 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=58, Invalid=177, Unknown=5, NotChecked=0, Total=240 [2019-09-07 12:54:46,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-09-07 12:54:46,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 107. [2019-09-07 12:54:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-07 12:54:46,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 144 transitions. [2019-09-07 12:54:46,256 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 144 transitions. Word has length 68 [2019-09-07 12:54:46,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:54:46,257 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 144 transitions. [2019-09-07 12:54:46,257 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 12:54:46,257 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 144 transitions. [2019-09-07 12:54:46,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-07 12:54:46,258 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:54:46,258 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:54:46,259 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:54:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:54:46,259 INFO L82 PathProgramCache]: Analyzing trace with hash 715528236, now seen corresponding path program 3 times [2019-09-07 12:54:46,259 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:54:46,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:54:46,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:46,260 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:54:46,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:46,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:54:46,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:54:46,332 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 [2019-09-07 12:54:46,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:54:46,393 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-09-07 12:54:46,394 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:54:46,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 12:54:46,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:54:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:54:46,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:54:46,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-09-07 12:54:46,420 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 12:54:46,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 12:54:46,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-09-07 12:54:46,421 INFO L87 Difference]: Start difference. First operand 107 states and 144 transitions. Second operand 8 states. [2019-09-07 12:54:46,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:54:46,551 INFO L93 Difference]: Finished difference Result 234 states and 319 transitions. [2019-09-07 12:54:46,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 12:54:46,551 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2019-09-07 12:54:46,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:54:46,553 INFO L225 Difference]: With dead ends: 234 [2019-09-07 12:54:46,553 INFO L226 Difference]: Without dead ends: 137 [2019-09-07 12:54:46,554 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-09-07 12:54:46,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-09-07 12:54:46,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 109. [2019-09-07 12:54:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-07 12:54:46,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 147 transitions. [2019-09-07 12:54:46,567 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 147 transitions. Word has length 69 [2019-09-07 12:54:46,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:54:46,567 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 147 transitions. [2019-09-07 12:54:46,567 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 12:54:46,567 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 147 transitions. [2019-09-07 12:54:46,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-07 12:54:46,568 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:54:46,569 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:54:46,569 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:54:46,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:54:46,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1012977781, now seen corresponding path program 3 times [2019-09-07 12:54:46,569 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:54:46,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:54:46,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:46,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:54:46,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:54:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:54:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:54:46,700 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:54:46,701 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 [2019-09-07 12:54:46,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:54:46,779 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-09-07 12:54:46,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:54:46,780 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 12:54:46,781 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:54:47,851 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:54:47,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:54:47,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-09-07 12:54:47,860 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 12:54:47,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 12:54:47,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=83, Unknown=1, NotChecked=0, Total=110 [2019-09-07 12:54:47,861 INFO L87 Difference]: Start difference. First operand 109 states and 147 transitions. Second operand 11 states. [2019-09-07 12:55:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:55:17,385 INFO L93 Difference]: Finished difference Result 244 states and 334 transitions. [2019-09-07 12:55:17,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 12:55:17,385 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2019-09-07 12:55:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:55:17,387 INFO L225 Difference]: With dead ends: 244 [2019-09-07 12:55:17,387 INFO L226 Difference]: Without dead ends: 145 [2019-09-07 12:55:17,388 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=67, Invalid=233, Unknown=6, NotChecked=0, Total=306 [2019-09-07 12:55:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-09-07 12:55:17,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 110. [2019-09-07 12:55:17,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-07 12:55:17,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 149 transitions. [2019-09-07 12:55:17,402 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 149 transitions. Word has length 71 [2019-09-07 12:55:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:55:17,404 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 149 transitions. [2019-09-07 12:55:17,404 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 12:55:17,404 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 149 transitions. [2019-09-07 12:55:17,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-07 12:55:17,405 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:55:17,405 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:55:17,406 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:55:17,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:55:17,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1306087997, now seen corresponding path program 4 times [2019-09-07 12:55:17,406 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:55:17,406 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:55:17,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:55:17,407 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:55:17,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:55:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:55:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:55:17,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:55:17,482 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) [2019-09-07 12:55:17,501 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:55:17,530 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:55:17,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:55:17,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 12:55:17,533 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:55:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:55:17,556 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:55:17,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-09-07 12:55:17,557 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 12:55:17,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 12:55:17,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-09-07 12:55:17,558 INFO L87 Difference]: Start difference. First operand 110 states and 149 transitions. Second operand 9 states. [2019-09-07 12:55:17,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:55:17,679 INFO L93 Difference]: Finished difference Result 247 states and 339 transitions. [2019-09-07 12:55:17,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 12:55:17,680 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2019-09-07 12:55:17,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:55:17,681 INFO L225 Difference]: With dead ends: 247 [2019-09-07 12:55:17,681 INFO L226 Difference]: Without dead ends: 147 [2019-09-07 12:55:17,683 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2019-09-07 12:55:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-09-07 12:55:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2019-09-07 12:55:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-09-07 12:55:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 152 transitions. [2019-09-07 12:55:17,695 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 152 transitions. Word has length 72 [2019-09-07 12:55:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:55:17,695 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 152 transitions. [2019-09-07 12:55:17,695 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 12:55:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 152 transitions. [2019-09-07 12:55:17,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-07 12:55:17,696 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:55:17,697 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:55:17,697 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:55:17,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:55:17,697 INFO L82 PathProgramCache]: Analyzing trace with hash -420730532, now seen corresponding path program 4 times [2019-09-07 12:55:17,697 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:55:17,698 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:55:17,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:55:17,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:55:17,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:55:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:55:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:55:17,847 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:55:17,847 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:55:17,865 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:55:17,909 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:55:17,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:55:17,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 12:55:17,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:55:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:55:19,235 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:55:19,235 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2019-09-07 12:55:19,236 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 12:55:19,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 12:55:19,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=102, Unknown=1, NotChecked=0, Total=132 [2019-09-07 12:55:19,236 INFO L87 Difference]: Start difference. First operand 112 states and 152 transitions. Second operand 12 states. [2019-09-07 12:55:47,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:55:47,733 INFO L93 Difference]: Finished difference Result 257 states and 354 transitions. [2019-09-07 12:55:47,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 12:55:47,734 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-09-07 12:55:47,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:55:47,736 INFO L225 Difference]: With dead ends: 257 [2019-09-07 12:55:47,736 INFO L226 Difference]: Without dead ends: 155 [2019-09-07 12:55:47,738 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=60, Invalid=240, Unknown=6, NotChecked=0, Total=306 [2019-09-07 12:55:47,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-09-07 12:55:47,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 113. [2019-09-07 12:55:47,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-09-07 12:55:47,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 154 transitions. [2019-09-07 12:55:47,747 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 154 transitions. Word has length 74 [2019-09-07 12:55:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:55:47,747 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 154 transitions. [2019-09-07 12:55:47,748 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 12:55:47,748 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 154 transitions. [2019-09-07 12:55:47,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-07 12:55:47,749 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:55:47,749 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:55:47,749 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:55:47,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:55:47,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1809083764, now seen corresponding path program 5 times [2019-09-07 12:55:47,750 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:55:47,750 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:55:47,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:55:47,751 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:55:47,751 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:55:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:55:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 66 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:55:47,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:55:47,835 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 [2019-09-07 12:55:47,852 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:55:47,877 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-07 12:55:47,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:55:47,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 12:55:47,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:55:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 25 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:55:47,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:55:47,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-09-07 12:55:47,900 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 12:55:47,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 12:55:47,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-09-07 12:55:47,901 INFO L87 Difference]: Start difference. First operand 113 states and 154 transitions. Second operand 10 states. [2019-09-07 12:55:48,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:55:48,051 INFO L93 Difference]: Finished difference Result 260 states and 359 transitions. [2019-09-07 12:55:48,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 12:55:48,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2019-09-07 12:55:48,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:55:48,053 INFO L225 Difference]: With dead ends: 260 [2019-09-07 12:55:48,053 INFO L226 Difference]: Without dead ends: 157 [2019-09-07 12:55:48,054 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2019-09-07 12:55:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-09-07 12:55:48,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 115. [2019-09-07 12:55:48,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-09-07 12:55:48,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 157 transitions. [2019-09-07 12:55:48,064 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 157 transitions. Word has length 75 [2019-09-07 12:55:48,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:55:48,065 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 157 transitions. [2019-09-07 12:55:48,065 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 12:55:48,065 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 157 transitions. [2019-09-07 12:55:48,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-07 12:55:48,066 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:55:48,066 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:55:48,066 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:55:48,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:55:48,067 INFO L82 PathProgramCache]: Analyzing trace with hash -508587541, now seen corresponding path program 5 times [2019-09-07 12:55:48,067 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:55:48,067 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:55:48,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:55:48,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:55:48,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:55:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:55:48,210 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:55:48,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:55:48,210 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) [2019-09-07 12:55:48,223 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:55:48,246 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-07 12:55:48,246 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:55:48,247 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 12:55:48,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:55:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 25 proven. 63 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:55:49,540 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:55:49,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2019-09-07 12:55:49,541 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 12:55:49,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 12:55:49,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=123, Unknown=1, NotChecked=0, Total=156 [2019-09-07 12:55:49,541 INFO L87 Difference]: Start difference. First operand 115 states and 157 transitions. Second operand 13 states. [2019-09-07 12:56:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:56:25,644 INFO L93 Difference]: Finished difference Result 264 states and 364 transitions. [2019-09-07 12:56:25,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 12:56:25,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2019-09-07 12:56:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:56:25,647 INFO L225 Difference]: With dead ends: 264 [2019-09-07 12:56:25,647 INFO L226 Difference]: Without dead ends: 159 [2019-09-07 12:56:25,648 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=85, Invalid=368, Unknown=9, NotChecked=0, Total=462 [2019-09-07 12:56:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-09-07 12:56:25,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 116. [2019-09-07 12:56:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-07 12:56:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 159 transitions. [2019-09-07 12:56:25,658 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 159 transitions. Word has length 77 [2019-09-07 12:56:25,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:56:25,658 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 159 transitions. [2019-09-07 12:56:25,658 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 12:56:25,658 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 159 transitions. [2019-09-07 12:56:25,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-07 12:56:25,660 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:56:25,660 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:56:25,660 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:56:25,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:56:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash -237683747, now seen corresponding path program 6 times [2019-09-07 12:56:25,661 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:56:25,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:56:25,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:56:25,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:56:25,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:56:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:56:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 4 proven. 86 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:56:25,736 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:56:25,736 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-07 12:56:25,757 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:56:25,810 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-09-07 12:56:25,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:56:25,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 12:56:25,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:56:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:56:25,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:56:25,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2019-09-07 12:56:25,843 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 12:56:25,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 12:56:25,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-09-07 12:56:25,844 INFO L87 Difference]: Start difference. First operand 116 states and 159 transitions. Second operand 11 states. [2019-09-07 12:56:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:56:26,059 INFO L93 Difference]: Finished difference Result 273 states and 379 transitions. [2019-09-07 12:56:26,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 12:56:26,060 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2019-09-07 12:56:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:56:26,061 INFO L225 Difference]: With dead ends: 273 [2019-09-07 12:56:26,061 INFO L226 Difference]: Without dead ends: 167 [2019-09-07 12:56:26,062 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2019-09-07 12:56:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-09-07 12:56:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 118. [2019-09-07 12:56:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-09-07 12:56:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 162 transitions. [2019-09-07 12:56:26,079 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 162 transitions. Word has length 78 [2019-09-07 12:56:26,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:56:26,080 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 162 transitions. [2019-09-07 12:56:26,080 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 12:56:26,080 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 162 transitions. [2019-09-07 12:56:26,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-07 12:56:26,083 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:56:26,083 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:56:26,083 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:56:26,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:56:26,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2073307900, now seen corresponding path program 6 times [2019-09-07 12:56:26,084 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:56:26,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:56:26,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:56:26,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:56:26,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:56:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:56:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 4 proven. 93 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:56:26,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:56:26,269 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) [2019-09-07 12:56:26,282 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:56:26,353 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-09-07 12:56:26,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:56:26,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 12:56:26,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:56:27,534 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (20)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:56:27,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:56:27,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2019-09-07 12:56:27,538 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 12:56:27,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 12:56:27,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=146, Unknown=1, NotChecked=0, Total=182 [2019-09-07 12:56:27,539 INFO L87 Difference]: Start difference. First operand 118 states and 162 transitions. Second operand 14 states. [2019-09-07 12:57:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:57:04,668 INFO L93 Difference]: Finished difference Result 274 states and 379 transitions. [2019-09-07 12:57:04,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 12:57:04,668 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2019-09-07 12:57:04,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:57:04,671 INFO L225 Difference]: With dead ends: 274 [2019-09-07 12:57:04,671 INFO L226 Difference]: Without dead ends: 166 [2019-09-07 12:57:04,672 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=94, Invalid=448, Unknown=10, NotChecked=0, Total=552 [2019-09-07 12:57:04,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2019-09-07 12:57:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 119. [2019-09-07 12:57:04,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-09-07 12:57:04,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 164 transitions. [2019-09-07 12:57:04,682 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 164 transitions. Word has length 80 [2019-09-07 12:57:04,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:57:04,683 INFO L475 AbstractCegarLoop]: Abstraction has 119 states and 164 transitions. [2019-09-07 12:57:04,683 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 12:57:04,683 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 164 transitions. [2019-09-07 12:57:04,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-07 12:57:04,684 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:57:04,684 INFO L399 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:57:04,684 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:57:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:57:04,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1803303700, now seen corresponding path program 7 times [2019-09-07 12:57:04,685 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:57:04,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:57:04,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:57:04,686 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:57:04,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:57:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:57:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 109 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:57:04,780 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:57:04,780 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 [2019-09-07 12:57:04,792 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:57:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:57:04,831 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 12:57:04,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:57:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 25 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:57:04,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:57:04,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-09-07 12:57:04,856 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 12:57:04,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 12:57:04,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-09-07 12:57:04,857 INFO L87 Difference]: Start difference. First operand 119 states and 164 transitions. Second operand 12 states. [2019-09-07 12:57:05,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:57:05,073 INFO L93 Difference]: Finished difference Result 286 states and 399 transitions. [2019-09-07 12:57:05,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 12:57:05,073 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 81 [2019-09-07 12:57:05,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:57:05,075 INFO L225 Difference]: With dead ends: 286 [2019-09-07 12:57:05,075 INFO L226 Difference]: Without dead ends: 177 [2019-09-07 12:57:05,076 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2019-09-07 12:57:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-09-07 12:57:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 121. [2019-09-07 12:57:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-07 12:57:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 167 transitions. [2019-09-07 12:57:05,106 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 167 transitions. Word has length 81 [2019-09-07 12:57:05,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:57:05,106 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 167 transitions. [2019-09-07 12:57:05,106 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 12:57:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 167 transitions. [2019-09-07 12:57:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-07 12:57:05,108 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:57:05,108 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:57:05,108 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:57:05,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:57:05,109 INFO L82 PathProgramCache]: Analyzing trace with hash 751086667, now seen corresponding path program 7 times [2019-09-07 12:57:05,109 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:57:05,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:57:05,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:57:05,110 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:57:05,110 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:57:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:57:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 4 proven. 117 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:57:05,279 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:57:05,279 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:57:05,292 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:57:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:57:05,321 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 12:57:05,322 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:57:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 25 proven. 108 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (22)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:57:06,605 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:57:06,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-09-07 12:57:06,606 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 12:57:06,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 12:57:06,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=171, Unknown=1, NotChecked=0, Total=210 [2019-09-07 12:57:06,606 INFO L87 Difference]: Start difference. First operand 121 states and 167 transitions. Second operand 15 states. [2019-09-07 12:57:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:57:35,954 INFO L93 Difference]: Finished difference Result 284 states and 394 transitions. [2019-09-07 12:57:35,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 12:57:35,957 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2019-09-07 12:57:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:57:35,958 INFO L225 Difference]: With dead ends: 284 [2019-09-07 12:57:35,958 INFO L226 Difference]: Without dead ends: 173 [2019-09-07 12:57:35,959 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=103, Invalid=543, Unknown=4, NotChecked=0, Total=650 [2019-09-07 12:57:35,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-09-07 12:57:35,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 122. [2019-09-07 12:57:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-09-07 12:57:35,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 169 transitions. [2019-09-07 12:57:35,970 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 169 transitions. Word has length 83 [2019-09-07 12:57:35,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:57:35,971 INFO L475 AbstractCegarLoop]: Abstraction has 122 states and 169 transitions. [2019-09-07 12:57:35,971 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 12:57:35,971 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 169 transitions. [2019-09-07 12:57:35,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-07 12:57:35,972 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:57:35,972 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:57:35,972 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:57:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:57:35,973 INFO L82 PathProgramCache]: Analyzing trace with hash 157511037, now seen corresponding path program 8 times [2019-09-07 12:57:35,973 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:57:35,973 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:57:35,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:57:35,974 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:57:35,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:57:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:57:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 4 proven. 135 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:57:36,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:57:36,097 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 [2019-09-07 12:57:36,108 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:57:36,135 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:57:36,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:57:36,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 12:57:36,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:57:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 25 proven. 126 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:57:36,151 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:57:36,151 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2019-09-07 12:57:36,152 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 12:57:36,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 12:57:36,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-09-07 12:57:36,152 INFO L87 Difference]: Start difference. First operand 122 states and 169 transitions. Second operand 13 states. [2019-09-07 12:57:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:57:36,370 INFO L93 Difference]: Finished difference Result 299 states and 419 transitions. [2019-09-07 12:57:36,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 12:57:36,375 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 84 [2019-09-07 12:57:36,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:57:36,377 INFO L225 Difference]: With dead ends: 299 [2019-09-07 12:57:36,377 INFO L226 Difference]: Without dead ends: 187 [2019-09-07 12:57:36,379 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2019-09-07 12:57:36,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-09-07 12:57:36,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 124. [2019-09-07 12:57:36,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-07 12:57:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 172 transitions. [2019-09-07 12:57:36,395 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 172 transitions. Word has length 84 [2019-09-07 12:57:36,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:57:36,395 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 172 transitions. [2019-09-07 12:57:36,395 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 12:57:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 172 transitions. [2019-09-07 12:57:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-07 12:57:36,397 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:57:36,397 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:57:36,397 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:57:36,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:57:36,397 INFO L82 PathProgramCache]: Analyzing trace with hash -396594020, now seen corresponding path program 8 times [2019-09-07 12:57:36,397 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:57:36,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:57:36,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:57:36,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:57:36,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:57:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:57:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 4 proven. 144 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:57:36,684 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:57:36,684 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) [2019-09-07 12:57:36,708 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:57:36,741 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:57:36,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:57:36,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 12:57:36,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:57:38,284 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 25 proven. 135 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:57:38,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:57:38,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2019-09-07 12:57:38,288 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 12:57:38,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 12:57:38,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=198, Unknown=1, NotChecked=0, Total=240 [2019-09-07 12:57:38,289 INFO L87 Difference]: Start difference. First operand 124 states and 172 transitions. Second operand 16 states. [2019-09-07 12:58:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:58:28,653 INFO L93 Difference]: Finished difference Result 294 states and 409 transitions. [2019-09-07 12:58:28,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 12:58:28,653 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2019-09-07 12:58:28,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:58:28,655 INFO L225 Difference]: With dead ends: 294 [2019-09-07 12:58:28,656 INFO L226 Difference]: Without dead ends: 180 [2019-09-07 12:58:28,657 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=112, Invalid=633, Unknown=11, NotChecked=0, Total=756 [2019-09-07 12:58:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-09-07 12:58:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 125. [2019-09-07 12:58:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-09-07 12:58:28,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 174 transitions. [2019-09-07 12:58:28,669 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 174 transitions. Word has length 86 [2019-09-07 12:58:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:58:28,669 INFO L475 AbstractCegarLoop]: Abstraction has 125 states and 174 transitions. [2019-09-07 12:58:28,669 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 12:58:28,669 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 174 transitions. [2019-09-07 12:58:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-07 12:58:28,671 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:58:28,671 INFO L399 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:58:28,671 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:58:28,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:58:28,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1060851892, now seen corresponding path program 9 times [2019-09-07 12:58:28,671 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:58:28,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:58:28,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:58:28,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:58:28,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:58:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:58:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:58:28,815 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:58:28,816 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) [2019-09-07 12:58:28,828 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:58:28,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-09-07 12:58:28,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:58:28,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 12:58:28,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:58:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:58:28,922 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:58:28,922 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2019-09-07 12:58:28,922 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 12:58:28,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 12:58:28,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-09-07 12:58:28,924 INFO L87 Difference]: Start difference. First operand 125 states and 174 transitions. Second operand 14 states. [2019-09-07 12:58:29,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:58:29,247 INFO L93 Difference]: Finished difference Result 312 states and 439 transitions. [2019-09-07 12:58:29,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 12:58:29,248 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 87 [2019-09-07 12:58:29,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:58:29,249 INFO L225 Difference]: With dead ends: 312 [2019-09-07 12:58:29,250 INFO L226 Difference]: Without dead ends: 197 [2019-09-07 12:58:29,251 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2019-09-07 12:58:29,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-09-07 12:58:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 127. [2019-09-07 12:58:29,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-09-07 12:58:29,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 177 transitions. [2019-09-07 12:58:29,268 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 177 transitions. Word has length 87 [2019-09-07 12:58:29,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:58:29,269 INFO L475 AbstractCegarLoop]: Abstraction has 127 states and 177 transitions. [2019-09-07 12:58:29,269 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 12:58:29,269 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 177 transitions. [2019-09-07 12:58:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-07 12:58:29,270 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:58:29,270 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:58:29,271 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:58:29,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:58:29,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1282703019, now seen corresponding path program 9 times [2019-09-07 12:58:29,271 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:58:29,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:58:29,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:58:29,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:58:29,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:58:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:58:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 4 proven. 174 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 12:58:29,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:58:29,527 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 [2019-09-07 12:58:29,537 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:59:31,961 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-09-07 12:59:31,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:59:32,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 12:59:32,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:59:34,295 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 25 proven. 165 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 12:59:34,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:59:34,300 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2019-09-07 12:59:34,301 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 12:59:34,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 12:59:34,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=227, Unknown=1, NotChecked=0, Total=272 [2019-09-07 12:59:34,301 INFO L87 Difference]: Start difference. First operand 127 states and 177 transitions. Second operand 17 states. [2019-09-07 13:00:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 13:00:03,480 INFO L93 Difference]: Finished difference Result 304 states and 424 transitions. [2019-09-07 13:00:03,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 13:00:03,481 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 89 [2019-09-07 13:00:03,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 13:00:03,483 INFO L225 Difference]: With dead ends: 304 [2019-09-07 13:00:03,483 INFO L226 Difference]: Without dead ends: 187 [2019-09-07 13:00:03,485 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=121, Invalid=745, Unknown=4, NotChecked=0, Total=870 [2019-09-07 13:00:03,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-09-07 13:00:03,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 128. [2019-09-07 13:00:03,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-09-07 13:00:03,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 179 transitions. [2019-09-07 13:00:03,497 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 179 transitions. Word has length 89 [2019-09-07 13:00:03,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 13:00:03,497 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 179 transitions. [2019-09-07 13:00:03,497 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 13:00:03,498 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 179 transitions. [2019-09-07 13:00:03,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-07 13:00:03,499 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 13:00:03,499 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 13:00:03,499 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 13:00:03,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 13:00:03,500 INFO L82 PathProgramCache]: Analyzing trace with hash -542251235, now seen corresponding path program 10 times [2019-09-07 13:00:03,500 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 13:00:03,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 13:00:03,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:00:03,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 13:00:03,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:00:03,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:00:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 4 proven. 196 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 13:00:03,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 13:00:03,669 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 13:00:03,684 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 13:00:03,727 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 13:00:03,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 13:00:03,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 13:00:03,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 13:00:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 25 proven. 187 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 13:00:03,746 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 13:00:03,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2019-09-07 13:00:03,746 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 13:00:03,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 13:00:03,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-09-07 13:00:03,747 INFO L87 Difference]: Start difference. First operand 128 states and 179 transitions. Second operand 15 states. [2019-09-07 13:00:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 13:00:04,044 INFO L93 Difference]: Finished difference Result 325 states and 459 transitions. [2019-09-07 13:00:04,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 13:00:04,045 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 90 [2019-09-07 13:00:04,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 13:00:04,046 INFO L225 Difference]: With dead ends: 325 [2019-09-07 13:00:04,046 INFO L226 Difference]: Without dead ends: 207 [2019-09-07 13:00:04,048 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2019-09-07 13:00:04,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-09-07 13:00:04,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 130. [2019-09-07 13:00:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-09-07 13:00:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 182 transitions. [2019-09-07 13:00:04,061 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 182 transitions. Word has length 90 [2019-09-07 13:00:04,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 13:00:04,061 INFO L475 AbstractCegarLoop]: Abstraction has 130 states and 182 transitions. [2019-09-07 13:00:04,061 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 13:00:04,062 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 182 transitions. [2019-09-07 13:00:04,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-07 13:00:04,063 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 13:00:04,063 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 13:00:04,063 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 13:00:04,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 13:00:04,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1441728060, now seen corresponding path program 10 times [2019-09-07 13:00:04,064 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 13:00:04,064 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 13:00:04,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:00:04,064 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 13:00:04,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:00:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:00:04,348 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 4 proven. 207 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 13:00:04,349 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 13:00:04,349 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 [2019-09-07 13:00:04,369 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 13:00:04,401 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 13:00:04,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 13:00:04,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 13:00:04,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 13:00:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 25 proven. 198 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 13:00:05,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 13:00:05,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2019-09-07 13:00:05,996 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 13:00:05,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 13:00:05,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=258, Unknown=1, NotChecked=0, Total=306 [2019-09-07 13:00:05,997 INFO L87 Difference]: Start difference. First operand 130 states and 182 transitions. Second operand 18 states. [2019-09-07 13:01:02,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 13:01:02,207 INFO L93 Difference]: Finished difference Result 314 states and 439 transitions. [2019-09-07 13:01:02,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 13:01:02,207 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 92 [2019-09-07 13:01:02,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 13:01:02,209 INFO L225 Difference]: With dead ends: 314 [2019-09-07 13:01:02,209 INFO L226 Difference]: Without dead ends: 194 [2019-09-07 13:01:02,211 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 81 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=130, Invalid=849, Unknown=13, NotChecked=0, Total=992 [2019-09-07 13:01:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-09-07 13:01:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 131. [2019-09-07 13:01:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-09-07 13:01:02,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 184 transitions. [2019-09-07 13:01:02,223 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 184 transitions. Word has length 92 [2019-09-07 13:01:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 13:01:02,224 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 184 transitions. [2019-09-07 13:01:02,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 13:01:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 184 transitions. [2019-09-07 13:01:02,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-07 13:01:02,225 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 13:01:02,225 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 13:01:02,225 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 13:01:02,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 13:01:02,226 INFO L82 PathProgramCache]: Analyzing trace with hash 92557740, now seen corresponding path program 11 times [2019-09-07 13:01:02,226 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 13:01:02,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 13:01:02,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:01:02,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 13:01:02,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:01:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:01:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 4 proven. 231 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 13:01:02,384 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 13:01:02,385 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 13:01:02,395 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 13:01:02,426 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-07 13:01:02,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 13:01:02,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 13:01:02,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 13:01:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 13:01:02,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 13:01:02,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2019-09-07 13:01:02,445 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 13:01:02,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 13:01:02,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-09-07 13:01:02,446 INFO L87 Difference]: Start difference. First operand 131 states and 184 transitions. Second operand 16 states. [2019-09-07 13:01:02,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 13:01:02,804 INFO L93 Difference]: Finished difference Result 338 states and 479 transitions. [2019-09-07 13:01:02,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 13:01:02,804 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 93 [2019-09-07 13:01:02,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 13:01:02,807 INFO L225 Difference]: With dead ends: 338 [2019-09-07 13:01:02,807 INFO L226 Difference]: Without dead ends: 217 [2019-09-07 13:01:02,812 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2019-09-07 13:01:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-09-07 13:01:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 133. [2019-09-07 13:01:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-09-07 13:01:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 187 transitions. [2019-09-07 13:01:02,842 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 187 transitions. Word has length 93 [2019-09-07 13:01:02,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 13:01:02,842 INFO L475 AbstractCegarLoop]: Abstraction has 133 states and 187 transitions. [2019-09-07 13:01:02,842 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 13:01:02,843 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 187 transitions. [2019-09-07 13:01:02,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-07 13:01:02,845 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 13:01:02,845 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 13:01:02,845 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 13:01:02,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 13:01:02,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1607797003, now seen corresponding path program 11 times [2019-09-07 13:01:02,846 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 13:01:02,846 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 13:01:02,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:01:02,847 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 13:01:02,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:01:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:01:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 4 proven. 243 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 13:01:03,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 13:01:03,210 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 13:01:03,219 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 13:01:03,255 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-07 13:01:03,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 13:01:03,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 13:01:03,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 13:01:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 25 proven. 234 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 13:01:04,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 13:01:04,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2019-09-07 13:01:04,889 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 13:01:04,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 13:01:04,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=291, Unknown=1, NotChecked=0, Total=342 [2019-09-07 13:01:04,890 INFO L87 Difference]: Start difference. First operand 133 states and 187 transitions. Second operand 19 states. [2019-09-07 13:02:05,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 13:02:05,624 INFO L93 Difference]: Finished difference Result 324 states and 454 transitions. [2019-09-07 13:02:05,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-07 13:02:05,624 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 95 [2019-09-07 13:02:05,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 13:02:05,626 INFO L225 Difference]: With dead ends: 324 [2019-09-07 13:02:05,627 INFO L226 Difference]: Without dead ends: 201 [2019-09-07 13:02:05,628 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 83 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 20.7s TimeCoverageRelationStatistics Valid=139, Invalid=968, Unknown=15, NotChecked=0, Total=1122 [2019-09-07 13:02:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-09-07 13:02:05,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 134. [2019-09-07 13:02:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-09-07 13:02:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 189 transitions. [2019-09-07 13:02:05,643 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 189 transitions. Word has length 95 [2019-09-07 13:02:05,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 13:02:05,643 INFO L475 AbstractCegarLoop]: Abstraction has 134 states and 189 transitions. [2019-09-07 13:02:05,643 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 13:02:05,643 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 189 transitions. [2019-09-07 13:02:05,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-07 13:02:05,645 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 13:02:05,645 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 13:02:05,645 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 13:02:05,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 13:02:05,645 INFO L82 PathProgramCache]: Analyzing trace with hash 945727677, now seen corresponding path program 12 times [2019-09-07 13:02:05,645 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 13:02:05,646 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 13:02:05,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:02:05,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 13:02:05,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:02:05,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:02:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 4 proven. 269 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 13:02:05,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 13:02:05,816 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 13:02:05,830 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 13:02:05,888 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-09-07 13:02:05,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 13:02:05,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 13:02:05,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 13:02:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 25 proven. 260 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (31)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 13:02:05,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 13:02:05,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2019-09-07 13:02:05,909 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 13:02:05,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 13:02:05,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-09-07 13:02:05,910 INFO L87 Difference]: Start difference. First operand 134 states and 189 transitions. Second operand 17 states. [2019-09-07 13:02:06,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 13:02:06,307 INFO L93 Difference]: Finished difference Result 351 states and 499 transitions. [2019-09-07 13:02:06,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 13:02:06,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2019-09-07 13:02:06,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 13:02:06,312 INFO L225 Difference]: With dead ends: 351 [2019-09-07 13:02:06,312 INFO L226 Difference]: Without dead ends: 227 [2019-09-07 13:02:06,313 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2019-09-07 13:02:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-09-07 13:02:06,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 136. [2019-09-07 13:02:06,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-09-07 13:02:06,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 192 transitions. [2019-09-07 13:02:06,329 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 192 transitions. Word has length 96 [2019-09-07 13:02:06,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 13:02:06,329 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 192 transitions. [2019-09-07 13:02:06,329 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 13:02:06,329 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 192 transitions. [2019-09-07 13:02:06,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-07 13:02:06,331 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 13:02:06,331 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 13:02:06,331 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 13:02:06,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 13:02:06,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1165352924, now seen corresponding path program 12 times [2019-09-07 13:02:06,331 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 13:02:06,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 13:02:06,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:02:06,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 13:02:06,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:02:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:02:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 4 proven. 282 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 13:02:06,657 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 13:02:06,657 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 13:02:06,670 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 13:02:06,865 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-09-07 13:02:06,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 13:02:06,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-07 13:02:06,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 13:02:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 25 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (32)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 13:02:08,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 13:02:08,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2019-09-07 13:02:08,521 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 13:02:08,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 13:02:08,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=326, Unknown=1, NotChecked=0, Total=380 [2019-09-07 13:02:08,522 INFO L87 Difference]: Start difference. First operand 136 states and 192 transitions. Second operand 20 states. [2019-09-07 13:03:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 13:03:07,652 INFO L93 Difference]: Finished difference Result 337 states and 474 transitions. [2019-09-07 13:03:07,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 13:03:07,653 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-09-07 13:03:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 13:03:07,655 INFO L225 Difference]: With dead ends: 337 [2019-09-07 13:03:07,655 INFO L226 Difference]: Without dead ends: 211 [2019-09-07 13:03:07,656 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 83 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=148, Invalid=1097, Unknown=15, NotChecked=0, Total=1260 [2019-09-07 13:03:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-09-07 13:03:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 137. [2019-09-07 13:03:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-09-07 13:03:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 194 transitions. [2019-09-07 13:03:07,672 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 194 transitions. Word has length 98 [2019-09-07 13:03:07,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 13:03:07,673 INFO L475 AbstractCegarLoop]: Abstraction has 137 states and 194 transitions. [2019-09-07 13:03:07,673 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 13:03:07,673 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 194 transitions. [2019-09-07 13:03:07,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-07 13:03:07,674 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 13:03:07,675 INFO L399 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 13:03:07,675 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 13:03:07,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 13:03:07,675 INFO L82 PathProgramCache]: Analyzing trace with hash 114863116, now seen corresponding path program 13 times [2019-09-07 13:03:07,675 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 13:03:07,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 13:03:07,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:03:07,676 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 13:03:07,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:03:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:03:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 4 proven. 310 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 13:03:07,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 13:03:07,853 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 13:03:07,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 13:03:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:03:07,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 13:03:07,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 13:03:07,912 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 25 proven. 301 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 13:03:07,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 13:03:07,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2019-09-07 13:03:07,917 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 13:03:07,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 13:03:07,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-09-07 13:03:07,918 INFO L87 Difference]: Start difference. First operand 137 states and 194 transitions. Second operand 18 states. [2019-09-07 13:03:08,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 13:03:08,299 INFO L93 Difference]: Finished difference Result 364 states and 519 transitions. [2019-09-07 13:03:08,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-07 13:03:08,300 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 99 [2019-09-07 13:03:08,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 13:03:08,301 INFO L225 Difference]: With dead ends: 364 [2019-09-07 13:03:08,301 INFO L226 Difference]: Without dead ends: 237 [2019-09-07 13:03:08,302 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2019-09-07 13:03:08,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-09-07 13:03:08,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 139. [2019-09-07 13:03:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-09-07 13:03:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 197 transitions. [2019-09-07 13:03:08,319 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 197 transitions. Word has length 99 [2019-09-07 13:03:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 13:03:08,319 INFO L475 AbstractCegarLoop]: Abstraction has 139 states and 197 transitions. [2019-09-07 13:03:08,319 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 13:03:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 197 transitions. [2019-09-07 13:03:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-07 13:03:08,320 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 13:03:08,320 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 13:03:08,321 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 13:03:08,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 13:03:08,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1568426859, now seen corresponding path program 13 times [2019-09-07 13:03:08,321 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 13:03:08,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 13:03:08,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:03:08,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 13:03:08,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:03:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:03:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 13:03:08,669 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 13:03:08,670 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 13:03:08,680 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 13:03:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:03:08,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 13:03:08,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 13:03:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 25 proven. 315 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 13:03:10,314 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 13:03:10,314 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2019-09-07 13:03:10,314 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 13:03:10,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 13:03:10,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=363, Unknown=1, NotChecked=0, Total=420 [2019-09-07 13:03:10,315 INFO L87 Difference]: Start difference. First operand 139 states and 197 transitions. Second operand 21 states. [2019-09-07 13:04:17,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 13:04:17,771 INFO L93 Difference]: Finished difference Result 344 states and 484 transitions. [2019-09-07 13:04:17,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-07 13:04:17,772 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 101 [2019-09-07 13:04:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 13:04:17,773 INFO L225 Difference]: With dead ends: 344 [2019-09-07 13:04:17,774 INFO L226 Difference]: Without dead ends: 215 [2019-09-07 13:04:17,775 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 15 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=157, Invalid=1232, Unknown=17, NotChecked=0, Total=1406 [2019-09-07 13:04:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-09-07 13:04:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 140. [2019-09-07 13:04:17,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-09-07 13:04:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 199 transitions. [2019-09-07 13:04:17,790 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 199 transitions. Word has length 101 [2019-09-07 13:04:17,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 13:04:17,791 INFO L475 AbstractCegarLoop]: Abstraction has 140 states and 199 transitions. [2019-09-07 13:04:17,791 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 13:04:17,791 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 199 transitions. [2019-09-07 13:04:17,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-07 13:04:17,792 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 13:04:17,792 INFO L399 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 13:04:17,792 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 13:04:17,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 13:04:17,793 INFO L82 PathProgramCache]: Analyzing trace with hash -274746787, now seen corresponding path program 14 times [2019-09-07 13:04:17,793 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 13:04:17,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 13:04:17,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:04:17,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 13:04:17,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:04:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:04:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 4 proven. 354 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 13:04:17,999 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 13:04:17,999 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 13:04:18,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 13:04:18,048 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 13:04:18,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 13:04:18,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 13:04:18,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 13:04:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 25 proven. 345 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 13:04:18,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 13:04:18,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2019-09-07 13:04:18,079 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 13:04:18,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 13:04:18,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-09-07 13:04:18,080 INFO L87 Difference]: Start difference. First operand 140 states and 199 transitions. Second operand 19 states. [2019-09-07 13:04:18,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 13:04:18,571 INFO L93 Difference]: Finished difference Result 377 states and 539 transitions. [2019-09-07 13:04:18,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-07 13:04:18,572 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 102 [2019-09-07 13:04:18,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 13:04:18,575 INFO L225 Difference]: With dead ends: 377 [2019-09-07 13:04:18,575 INFO L226 Difference]: Without dead ends: 247 [2019-09-07 13:04:18,577 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2019-09-07 13:04:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-09-07 13:04:18,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 142. [2019-09-07 13:04:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-09-07 13:04:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 202 transitions. [2019-09-07 13:04:18,600 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 202 transitions. Word has length 102 [2019-09-07 13:04:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 13:04:18,600 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 202 transitions. [2019-09-07 13:04:18,600 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 13:04:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 202 transitions. [2019-09-07 13:04:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-07 13:04:18,601 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 13:04:18,602 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 13:04:18,602 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 13:04:18,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 13:04:18,602 INFO L82 PathProgramCache]: Analyzing trace with hash 815464828, now seen corresponding path program 14 times [2019-09-07 13:04:18,602 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 13:04:18,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 13:04:18,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:04:18,603 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 13:04:18,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:04:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:04:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 4 proven. 369 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 13:04:19,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 13:04:19,012 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 13:04:19,022 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 13:04:19,062 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 13:04:19,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 13:04:19,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-07 13:04:19,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 13:04:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 25 proven. 360 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 13:04:20,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 13:04:20,706 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2019-09-07 13:04:20,706 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 13:04:20,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 13:04:20,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=402, Unknown=1, NotChecked=0, Total=462 [2019-09-07 13:04:20,707 INFO L87 Difference]: Start difference. First operand 142 states and 202 transitions. Second operand 22 states. [2019-09-07 13:05:36,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 13:05:36,923 INFO L93 Difference]: Finished difference Result 354 states and 499 transitions. [2019-09-07 13:05:36,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-07 13:05:36,923 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 104 [2019-09-07 13:05:36,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 13:05:36,926 INFO L225 Difference]: With dead ends: 354 [2019-09-07 13:05:36,926 INFO L226 Difference]: Without dead ends: 222 [2019-09-07 13:05:36,928 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 89 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=166, Invalid=1377, Unknown=17, NotChecked=0, Total=1560 [2019-09-07 13:05:36,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-09-07 13:05:36,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 143. [2019-09-07 13:05:36,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-09-07 13:05:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 204 transitions. [2019-09-07 13:05:36,945 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 204 transitions. Word has length 104 [2019-09-07 13:05:36,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 13:05:36,945 INFO L475 AbstractCegarLoop]: Abstraction has 143 states and 204 transitions. [2019-09-07 13:05:36,945 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 13:05:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 204 transitions. [2019-09-07 13:05:36,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-07 13:05:36,947 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 13:05:36,947 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 13:05:36,947 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 13:05:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 13:05:36,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2141733268, now seen corresponding path program 15 times [2019-09-07 13:05:36,948 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 13:05:36,948 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 13:05:36,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:05:36,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 13:05:36,949 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:05:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:05:37,168 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 4 proven. 401 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 13:05:37,168 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 13:05:37,168 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 13:05:37,179 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 13:05:37,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-09-07 13:05:37,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 13:05:37,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 13:05:37,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 13:05:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 25 proven. 392 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (37)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 13:05:37,301 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 13:05:37,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2019-09-07 13:05:37,302 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 13:05:37,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 13:05:37,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-09-07 13:05:37,303 INFO L87 Difference]: Start difference. First operand 143 states and 204 transitions. Second operand 20 states. [2019-09-07 13:05:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 13:05:37,795 INFO L93 Difference]: Finished difference Result 390 states and 559 transitions. [2019-09-07 13:05:37,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 13:05:37,795 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2019-09-07 13:05:37,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 13:05:37,798 INFO L225 Difference]: With dead ends: 390 [2019-09-07 13:05:37,798 INFO L226 Difference]: Without dead ends: 257 [2019-09-07 13:05:37,799 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 13:05:37,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2019-09-07 13:05:37,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 145. [2019-09-07 13:05:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-09-07 13:05:37,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 207 transitions. [2019-09-07 13:05:37,819 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 207 transitions. Word has length 105 [2019-09-07 13:05:37,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 13:05:37,819 INFO L475 AbstractCegarLoop]: Abstraction has 145 states and 207 transitions. [2019-09-07 13:05:37,819 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 13:05:37,819 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 207 transitions. [2019-09-07 13:05:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-07 13:05:37,820 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 13:05:37,820 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 13:05:37,821 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 13:05:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 13:05:37,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1937786315, now seen corresponding path program 15 times [2019-09-07 13:05:37,821 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 13:05:37,821 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 13:05:37,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:05:37,822 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 13:05:37,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 13:05:37,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 13:05:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 4 proven. 417 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 13:05:38,431 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 13:05:38,431 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 13:05:38,442 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 13:07:58,553 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-09-07 13:07:58,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 13:07:58,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-07 13:07:58,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 13:08:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 439 backedges. 25 proven. 408 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-07 13:08:01,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 13:08:01,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2019-09-07 13:08:01,399 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 13:08:01,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 13:08:01,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=443, Unknown=1, NotChecked=0, Total=506 [2019-09-07 13:08:01,408 INFO L87 Difference]: Start difference. First operand 145 states and 207 transitions. Second operand 23 states.