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/loop-new/gauss_sum.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:11:00,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:11:00,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:11:00,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-05 12:11:00,282 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-05 12:11:00,283 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-05 12:11:00,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-05 12:11:00,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-05 12:11:00,286 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-05 12:11:00,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-05 12:11:00,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-05 12:11:00,290 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-05 12:11:00,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-05 12:11:00,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-05 12:11:00,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-05 12:11:00,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-05 12:11:00,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-05 12:11:00,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 12:11:00,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 12:11:00,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 12:11:00,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 12:11:00,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 12:11:00,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 12:11:00,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 12:11:00,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-05 12:11:00,303 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:11:00,304 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:11:00,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:11:00,305 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 [2019-09-05 12:11:00,338 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:11:00,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:11:00,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-05 12:11:00,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-05 12:11:00,342 INFO L138 SettingsManager]: * Use SBE=true [2019-09-05 12:11:00,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:11:00,342 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:11:00,345 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-05 12:11:00,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:11:00,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:11:00,346 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:11:00,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:11:00,346 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:11:00,346 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:11:00,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:11:00,347 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-05 12:11:00,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:11:00,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:11:00,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:11:00,348 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-05 12:11:00,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-05 12:11:00,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:11:00,350 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:11:00,350 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:11:00,350 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-05 12:11:00,350 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-05 12:11:00,350 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:11:00,351 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:11:00,351 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-05 12:11:00,392 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:11:00,408 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:11:00,413 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:11:00,414 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:11:00,415 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:11:00,417 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-09-05 12:11:00,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93ff675a3/bf57970279884c49acefd24bc9ded66c/FLAG50f02be04 [2019-09-05 12:11:00,884 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:11:00,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.v+cfa-reducer.c [2019-09-05 12:11:00,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93ff675a3/bf57970279884c49acefd24bc9ded66c/FLAG50f02be04 [2019-09-05 12:11:01,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93ff675a3/bf57970279884c49acefd24bc9ded66c [2019-09-05 12:11:01,312 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:11:01,313 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:11:01,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:11:01,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:11:01,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:11:01,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:11:01" (1/1) ... [2019-09-05 12:11:01,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d198c3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:11:01, skipping insertion in model container [2019-09-05 12:11:01,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:11:01" (1/1) ... [2019-09-05 12:11:01,327 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:11:01,343 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:11:01,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:11:01,559 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:11:01,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:11:01,586 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:11:01,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:11:01 WrapperNode [2019-09-05 12:11:01,587 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:11:01,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:11:01,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:11:01,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:11:01,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:11:01" (1/1) ... [2019-09-05 12:11:01,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:11:01" (1/1) ... [2019-09-05 12:11:01,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:11:01" (1/1) ... [2019-09-05 12:11:01,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:11:01" (1/1) ... [2019-09-05 12:11:01,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:11:01" (1/1) ... [2019-09-05 12:11:01,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:11:01" (1/1) ... [2019-09-05 12:11:01,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:11:01" (1/1) ... [2019-09-05 12:11:01,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:11:01,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:11:01,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:11:01,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:11:01,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:11:01" (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 [2019-09-05 12:11:01,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:11:01,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:11:01,756 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:11:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:11:01,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 12:11:01,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:11:01,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 12:11:01,757 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:11:01,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:11:01,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:11:01,913 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:11:01,913 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-05 12:11:01,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:11:01 BoogieIcfgContainer [2019-09-05 12:11:01,914 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:11:01,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:11:01,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:11:01,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:11:01,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:11:01" (1/3) ... [2019-09-05 12:11:01,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21af219d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:11:01, skipping insertion in model container [2019-09-05 12:11:01,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:11:01" (2/3) ... [2019-09-05 12:11:01,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21af219d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:11:01, skipping insertion in model container [2019-09-05 12:11:01,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:11:01" (3/3) ... [2019-09-05 12:11:01,922 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.v+cfa-reducer.c [2019-09-05 12:11:01,933 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:11:01,940 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:11:01,953 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:11:01,982 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-05 12:11:01,982 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:11:01,982 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-05 12:11:01,983 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:11:01,983 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:11:01,983 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:11:01,983 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:11:01,983 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:11:01,983 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:11:01,999 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-09-05 12:11:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-05 12:11:02,003 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:02,004 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:02,006 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:02,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:02,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-09-05 12:11:02,011 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:02,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:02,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:02,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:02,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:02,085 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:02,085 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:02,085 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:02,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:11:02,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-05 12:11:02,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:02,222 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:11:02,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-05 12:11:02,227 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-05 12:11:02,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-05 12:11:02,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-05 12:11:02,246 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-09-05 12:11:02,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:02,347 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-09-05 12:11:02,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-05 12:11:02,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-09-05 12:11:02,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:02,356 INFO L225 Difference]: With dead ends: 26 [2019-09-05 12:11:02,356 INFO L226 Difference]: Without dead ends: 13 [2019-09-05 12:11:02,359 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-05 12:11:02,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-05 12:11:02,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-05 12:11:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-05 12:11:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-05 12:11:02,389 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-05 12:11:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:02,389 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-05 12:11:02,390 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-05 12:11:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-05 12:11:02,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-05 12:11:02,390 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:02,391 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:02,391 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-09-05 12:11:02,392 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:02,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:02,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:02,393 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:02,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:02,403 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:02,403 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:02,403 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:02,418 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:11:02,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 12:11:02,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:02,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:02,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:02,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-05 12:11:02,525 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 12:11:02,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 12:11:02,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:11:02,526 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-09-05 12:11:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:02,602 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-09-05 12:11:02,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:11:02,602 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-09-05 12:11:02,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:02,603 INFO L225 Difference]: With dead ends: 17 [2019-09-05 12:11:02,603 INFO L226 Difference]: Without dead ends: 14 [2019-09-05 12:11:02,605 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:11:02,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-05 12:11:02,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-05 12:11:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-05 12:11:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-05 12:11:02,615 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-09-05 12:11:02,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:02,616 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-05 12:11:02,616 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 12:11:02,617 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-05 12:11:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-05 12:11:02,618 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:02,618 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:02,619 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:02,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:02,620 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-09-05 12:11:02,620 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:02,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:02,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:02,623 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:02,623 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:02,643 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:02,643 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:02,647 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:02,666 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:11:02,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:11:02,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:02,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-05 12:11:02,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:02,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:02,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:02,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:02,747 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-05 12:11:02,748 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 12:11:02,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 12:11:02,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:11:02,749 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2019-09-05 12:11:02,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:02,808 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-05 12:11:02,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 12:11:02,809 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-09-05 12:11:02,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:02,809 INFO L225 Difference]: With dead ends: 18 [2019-09-05 12:11:02,810 INFO L226 Difference]: Without dead ends: 15 [2019-09-05 12:11:02,810 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:11:02,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-05 12:11:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-05 12:11:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-05 12:11:02,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-09-05 12:11:02,815 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-09-05 12:11:02,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:02,816 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-09-05 12:11:02,816 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 12:11:02,816 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-09-05 12:11:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-05 12:11:02,817 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:02,817 INFO L399 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:02,817 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:02,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:02,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2093848400, now seen corresponding path program 3 times [2019-09-05 12:11:02,818 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:02,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:02,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:02,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:02,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:02,830 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:02,831 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:02,831 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:02,851 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:11:02,870 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-05 12:11:02,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:02,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 12:11:02,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:02,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:02,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:02,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-09-05 12:11:02,953 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-05 12:11:02,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-05 12:11:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:11:02,954 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2019-09-05 12:11:03,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:03,027 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-05 12:11:03,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 12:11:03,028 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-09-05 12:11:03,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:03,029 INFO L225 Difference]: With dead ends: 19 [2019-09-05 12:11:03,029 INFO L226 Difference]: Without dead ends: 16 [2019-09-05 12:11:03,029 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:11:03,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-05 12:11:03,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-05 12:11:03,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-05 12:11:03,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-05 12:11:03,035 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-05 12:11:03,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:03,035 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-05 12:11:03,035 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-05 12:11:03,035 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-05 12:11:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-05 12:11:03,036 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:03,036 INFO L399 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:03,037 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:03,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:03,037 INFO L82 PathProgramCache]: Analyzing trace with hash -484853433, now seen corresponding path program 4 times [2019-09-05 12:11:03,037 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:03,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:03,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:03,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:03,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:03,049 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:03,050 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:03,050 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 (exit command is (exit), workingDir is null) [2019-09-05 12:11:03,068 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:03,126 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:11:03,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:03,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-05 12:11:03,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:03,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:03,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:03,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-05 12:11:03,219 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-05 12:11:03,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-05 12:11:03,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-09-05 12:11:03,220 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-09-05 12:11:03,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:03,303 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-05 12:11:03,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 12:11:03,303 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-09-05 12:11:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:03,304 INFO L225 Difference]: With dead ends: 20 [2019-09-05 12:11:03,304 INFO L226 Difference]: Without dead ends: 17 [2019-09-05 12:11:03,305 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:11:03,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-05 12:11:03,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-05 12:11:03,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-05 12:11:03,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-05 12:11:03,312 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-09-05 12:11:03,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:03,313 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-05 12:11:03,313 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-05 12:11:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-05 12:11:03,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-05 12:11:03,317 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:03,317 INFO L399 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:03,317 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:03,318 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 5 times [2019-09-05 12:11:03,318 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:03,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:03,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:03,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:03,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:03,345 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:03,347 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:03,347 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 (exit command is (exit), workingDir is null) [2019-09-05 12:11:03,376 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:03,397 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-05 12:11:03,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:03,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-05 12:11:03,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:03,479 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:03,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:03,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-05 12:11:03,500 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 12:11:03,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 12:11:03,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-09-05 12:11:03,503 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-09-05 12:11:03,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:03,631 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-09-05 12:11:03,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 12:11:03,632 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-09-05 12:11:03,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:03,632 INFO L225 Difference]: With dead ends: 21 [2019-09-05 12:11:03,632 INFO L226 Difference]: Without dead ends: 18 [2019-09-05 12:11:03,633 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:11:03,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-05 12:11:03,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-05 12:11:03,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-05 12:11:03,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-09-05 12:11:03,638 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-09-05 12:11:03,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:03,639 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-09-05 12:11:03,639 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 12:11:03,639 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-09-05 12:11:03,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-05 12:11:03,640 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:03,640 INFO L399 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:03,640 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:03,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:03,641 INFO L82 PathProgramCache]: Analyzing trace with hash -2089680281, now seen corresponding path program 6 times [2019-09-05 12:11:03,641 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:03,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:03,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:03,642 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:03,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:03,656 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:03,657 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:03,657 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:03,673 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:11:03,693 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-05 12:11:03,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:03,695 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-05 12:11:03,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:03,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:03,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:03,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-05 12:11:03,838 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 12:11:03,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 12:11:03,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-09-05 12:11:03,840 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-09-05 12:11:03,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:03,942 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-09-05 12:11:03,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-05 12:11:03,943 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-09-05 12:11:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:03,944 INFO L225 Difference]: With dead ends: 22 [2019-09-05 12:11:03,945 INFO L226 Difference]: Without dead ends: 19 [2019-09-05 12:11:03,947 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:11:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-05 12:11:03,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-09-05 12:11:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-09-05 12:11:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-09-05 12:11:03,955 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-09-05 12:11:03,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:03,955 INFO L475 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-09-05 12:11:03,955 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 12:11:03,955 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-09-05 12:11:03,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-05 12:11:03,956 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:03,956 INFO L399 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:03,957 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:03,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:03,957 INFO L82 PathProgramCache]: Analyzing trace with hash -355641744, now seen corresponding path program 7 times [2019-09-05 12:11:03,957 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:03,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:03,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:03,959 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:03,959 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:03,980 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:03,981 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:03,981 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 (exit command is (exit), workingDir is null) [2019-09-05 12:11:04,004 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:11:04,024 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-09-05 12:11:04,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:04,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:11:04,168 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:04,168 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-05 12:11:04,169 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-05 12:11:04,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-05 12:11:04,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-09-05 12:11:04,170 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-09-05 12:11:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:04,283 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-09-05 12:11:04,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-05 12:11:04,283 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-09-05 12:11:04,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:04,284 INFO L225 Difference]: With dead ends: 23 [2019-09-05 12:11:04,284 INFO L226 Difference]: Without dead ends: 20 [2019-09-05 12:11:04,285 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:11:04,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-05 12:11:04,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-05 12:11:04,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-05 12:11:04,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-05 12:11:04,290 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-09-05 12:11:04,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:04,290 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-05 12:11:04,291 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-05 12:11:04,291 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-05 12:11:04,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 12:11:04,291 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:04,292 INFO L399 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:04,292 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:04,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:04,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1859945351, now seen corresponding path program 8 times [2019-09-05 12:11:04,293 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:04,293 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:04,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:04,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:04,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:04,303 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:04,303 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:04,304 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:04,320 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:11:04,342 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:11:04,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:04,346 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-05 12:11:04,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:04,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:04,493 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:04,497 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:04,498 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-09-05 12:11:04,498 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-05 12:11:04,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-05 12:11:04,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-09-05 12:11:04,499 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-09-05 12:11:04,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:04,675 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-09-05 12:11:04,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-05 12:11:04,677 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-09-05 12:11:04,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:04,678 INFO L225 Difference]: With dead ends: 24 [2019-09-05 12:11:04,678 INFO L226 Difference]: Without dead ends: 21 [2019-09-05 12:11:04,679 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:11:04,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-05 12:11:04,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-05 12:11:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-05 12:11:04,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-09-05 12:11:04,689 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-09-05 12:11:04,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:04,690 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-09-05 12:11:04,690 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-05 12:11:04,692 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-09-05 12:11:04,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-05 12:11:04,693 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:04,693 INFO L399 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:04,693 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:04,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1823668560, now seen corresponding path program 9 times [2019-09-05 12:11:04,694 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:04,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:04,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:04,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:04,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:04,710 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:04,711 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:04,711 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 (exit command is (exit), workingDir is null) [2019-09-05 12:11:04,739 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:04,766 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-05 12:11:04,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:04,768 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-09-05 12:11:04,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:04,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:04,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:04,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-09-05 12:11:04,974 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 12:11:04,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 12:11:04,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-09-05 12:11:04,975 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-09-05 12:11:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:05,098 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-09-05 12:11:05,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 12:11:05,098 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-09-05 12:11:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:05,099 INFO L225 Difference]: With dead ends: 25 [2019-09-05 12:11:05,100 INFO L226 Difference]: Without dead ends: 22 [2019-09-05 12:11:05,100 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:11:05,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-05 12:11:05,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-05 12:11:05,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-05 12:11:05,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-09-05 12:11:05,105 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-09-05 12:11:05,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:05,105 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-09-05 12:11:05,105 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 12:11:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-09-05 12:11:05,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-05 12:11:05,106 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:05,106 INFO L399 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:05,107 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:05,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:05,107 INFO L82 PathProgramCache]: Analyzing trace with hash 699088039, now seen corresponding path program 10 times [2019-09-05 12:11:05,107 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:05,107 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:05,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:05,108 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:05,108 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:05,117 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:05,117 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:05,117 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:05,132 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:11:05,209 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:11:05,209 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:05,210 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-05 12:11:05,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:05,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:05,386 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:05,386 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-09-05 12:11:05,386 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-05 12:11:05,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-05 12:11:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-09-05 12:11:05,387 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-09-05 12:11:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:05,518 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-09-05 12:11:05,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-05 12:11:05,518 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-09-05 12:11:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:05,519 INFO L225 Difference]: With dead ends: 26 [2019-09-05 12:11:05,519 INFO L226 Difference]: Without dead ends: 23 [2019-09-05 12:11:05,520 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:11:05,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-05 12:11:05,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-05 12:11:05,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-05 12:11:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-09-05 12:11:05,525 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-09-05 12:11:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:05,525 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-09-05 12:11:05,525 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-05 12:11:05,526 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-09-05 12:11:05,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-05 12:11:05,526 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:05,527 INFO L399 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:05,527 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:05,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:05,527 INFO L82 PathProgramCache]: Analyzing trace with hash 196830256, now seen corresponding path program 11 times [2019-09-05 12:11:05,527 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:05,527 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:05,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:05,528 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:05,528 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:05,538 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:05,538 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:05,538 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:05,558 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:11:05,579 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-05 12:11:05,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:05,581 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-05 12:11:05,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:05,739 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:05,763 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:05,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-09-05 12:11:05,763 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-05 12:11:05,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-05 12:11:05,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-09-05 12:11:05,764 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-09-05 12:11:05,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:05,968 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-09-05 12:11:05,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-05 12:11:05,968 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-09-05 12:11:05,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:05,969 INFO L225 Difference]: With dead ends: 27 [2019-09-05 12:11:05,969 INFO L226 Difference]: Without dead ends: 24 [2019-09-05 12:11:05,970 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:11:05,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-05 12:11:05,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-05 12:11:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-05 12:11:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-09-05 12:11:05,974 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-09-05 12:11:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:05,975 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-09-05 12:11:05,975 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-05 12:11:05,975 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-09-05 12:11:05,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-05 12:11:05,976 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:05,976 INFO L399 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:05,976 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:05,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:05,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1806708167, now seen corresponding path program 12 times [2019-09-05 12:11:05,977 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:05,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:05,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:05,978 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:05,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:05,987 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:05,987 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:05,987 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:06,009 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:11:06,033 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-05 12:11:06,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:06,035 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-09-05 12:11:06,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:06,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:06,260 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:06,260 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-09-05 12:11:06,261 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-05 12:11:06,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-05 12:11:06,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-09-05 12:11:06,262 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-09-05 12:11:06,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:06,430 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-09-05 12:11:06,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-05 12:11:06,431 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-09-05 12:11:06,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:06,431 INFO L225 Difference]: With dead ends: 28 [2019-09-05 12:11:06,432 INFO L226 Difference]: Without dead ends: 25 [2019-09-05 12:11:06,432 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-09-05 12:11:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-05 12:11:06,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-05 12:11:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-05 12:11:06,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-09-05 12:11:06,437 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-09-05 12:11:06,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:06,437 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-09-05 12:11:06,437 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-05 12:11:06,437 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-09-05 12:11:06,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-05 12:11:06,438 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:06,438 INFO L399 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:06,438 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:06,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:06,439 INFO L82 PathProgramCache]: Analyzing trace with hash 173315856, now seen corresponding path program 13 times [2019-09-05 12:11:06,439 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:06,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:06,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:06,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:06,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:06,449 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:06,449 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:06,449 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 (exit command is (exit), workingDir is null) [2019-09-05 12:11:06,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:11:06,498 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-05 12:11:06,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:06,685 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:06,712 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:06,712 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-09-05 12:11:06,712 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-05 12:11:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-05 12:11:06,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-09-05 12:11:06,713 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-09-05 12:11:06,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:06,901 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-09-05 12:11:06,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-05 12:11:06,902 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-09-05 12:11:06,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:06,903 INFO L225 Difference]: With dead ends: 29 [2019-09-05 12:11:06,903 INFO L226 Difference]: Without dead ends: 26 [2019-09-05 12:11:06,904 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:11:06,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-05 12:11:06,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-05 12:11:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-05 12:11:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-05 12:11:06,908 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-09-05 12:11:06,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:06,909 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-05 12:11:06,909 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-05 12:11:06,909 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-05 12:11:06,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-05 12:11:06,910 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:06,910 INFO L399 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:06,910 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:06,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:06,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1077761767, now seen corresponding path program 14 times [2019-09-05 12:11:06,911 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:06,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:06,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:06,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:06,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:06,921 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:06,921 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:06,922 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 (exit command is (exit), workingDir is null) [2019-09-05 12:11:06,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:06,978 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:11:06,979 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:06,980 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-09-05 12:11:06,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:07,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:07,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:07,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-09-05 12:11:07,223 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-05 12:11:07,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-05 12:11:07,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-09-05 12:11:07,224 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-09-05 12:11:07,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:07,492 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-09-05 12:11:07,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-05 12:11:07,493 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-09-05 12:11:07,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:07,494 INFO L225 Difference]: With dead ends: 30 [2019-09-05 12:11:07,494 INFO L226 Difference]: Without dead ends: 27 [2019-09-05 12:11:07,494 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:11:07,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-05 12:11:07,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-05 12:11:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-05 12:11:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-09-05 12:11:07,499 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-09-05 12:11:07,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:07,499 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-09-05 12:11:07,499 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-05 12:11:07,500 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-09-05 12:11:07,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-05 12:11:07,501 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:07,501 INFO L399 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:07,502 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:07,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:07,502 INFO L82 PathProgramCache]: Analyzing trace with hash -949186064, now seen corresponding path program 15 times [2019-09-05 12:11:07,502 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:07,502 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:07,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:07,503 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:07,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:07,520 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:07,520 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:07,521 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:07,544 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:11:07,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-05 12:11:07,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:07,637 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-09-05 12:11:07,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:07,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:07,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:07,898 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-09-05 12:11:07,898 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 12:11:07,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 12:11:07,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-09-05 12:11:07,899 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-09-05 12:11:08,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:08,203 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-09-05 12:11:08,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-05 12:11:08,206 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-09-05 12:11:08,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:08,207 INFO L225 Difference]: With dead ends: 31 [2019-09-05 12:11:08,207 INFO L226 Difference]: Without dead ends: 28 [2019-09-05 12:11:08,208 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-09-05 12:11:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-05 12:11:08,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-05 12:11:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-05 12:11:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-09-05 12:11:08,213 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-09-05 12:11:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:08,213 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-09-05 12:11:08,213 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 12:11:08,213 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-09-05 12:11:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-05 12:11:08,214 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:08,214 INFO L399 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:08,215 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:08,215 INFO L82 PathProgramCache]: Analyzing trace with hash 639940615, now seen corresponding path program 16 times [2019-09-05 12:11:08,215 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:08,215 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:08,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:08,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:08,217 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:08,226 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:08,226 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:08,226 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 (exit command is (exit), workingDir is null) [2019-09-05 12:11:08,242 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:08,418 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:11:08,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:08,420 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-09-05 12:11:08,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:08,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:08,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:08,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-09-05 12:11:08,686 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-05 12:11:08,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-05 12:11:08,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-09-05 12:11:08,687 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-09-05 12:11:08,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:08,968 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-09-05 12:11:08,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-05 12:11:08,968 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-09-05 12:11:08,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:08,969 INFO L225 Difference]: With dead ends: 32 [2019-09-05 12:11:08,969 INFO L226 Difference]: Without dead ends: 29 [2019-09-05 12:11:08,970 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:11:08,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-05 12:11:08,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-05 12:11:08,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-05 12:11:08,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-09-05 12:11:08,979 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-09-05 12:11:08,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:08,979 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-09-05 12:11:08,979 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-05 12:11:08,979 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-09-05 12:11:08,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-05 12:11:08,980 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:08,980 INFO L399 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:08,980 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:08,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:08,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1636739888, now seen corresponding path program 17 times [2019-09-05 12:11:08,981 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:08,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:08,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:08,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:08,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:08,990 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:08,990 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:08,990 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:09,010 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:11:09,046 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-05 12:11:09,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:09,048 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 79 conjunts are in the unsatisfiable core [2019-09-05 12:11:09,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:09,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:09,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:09,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-09-05 12:11:09,336 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-05 12:11:09,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-05 12:11:09,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-09-05 12:11:09,336 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2019-09-05 12:11:09,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:09,681 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-09-05 12:11:09,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-05 12:11:09,682 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2019-09-05 12:11:09,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:09,682 INFO L225 Difference]: With dead ends: 33 [2019-09-05 12:11:09,682 INFO L226 Difference]: Without dead ends: 30 [2019-09-05 12:11:09,683 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:11:09,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-05 12:11:09,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-05 12:11:09,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-05 12:11:09,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-09-05 12:11:09,689 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-09-05 12:11:09,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:09,689 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-09-05 12:11:09,689 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-05 12:11:09,689 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-09-05 12:11:09,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-05 12:11:09,690 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:09,690 INFO L399 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:09,690 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:09,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:09,691 INFO L82 PathProgramCache]: Analyzing trace with hash 800608551, now seen corresponding path program 18 times [2019-09-05 12:11:09,691 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:09,691 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:09,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:09,692 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:09,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:09,700 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:09,700 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:09,701 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:09,727 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:11:09,765 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-05 12:11:09,765 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:09,767 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-05 12:11:09,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:10,084 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:10,115 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:10,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-09-05 12:11:10,116 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-05 12:11:10,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-05 12:11:10,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-09-05 12:11:10,117 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-09-05 12:11:10,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:10,442 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-09-05 12:11:10,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-05 12:11:10,442 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-09-05 12:11:10,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:10,443 INFO L225 Difference]: With dead ends: 34 [2019-09-05 12:11:10,443 INFO L226 Difference]: Without dead ends: 31 [2019-09-05 12:11:10,444 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:11:10,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-05 12:11:10,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-09-05 12:11:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-05 12:11:10,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-09-05 12:11:10,451 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-09-05 12:11:10,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:10,451 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-09-05 12:11:10,451 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-05 12:11:10,451 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-09-05 12:11:10,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-05 12:11:10,453 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:10,453 INFO L399 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:10,453 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:10,454 INFO L82 PathProgramCache]: Analyzing trace with hash -951001168, now seen corresponding path program 19 times [2019-09-05 12:11:10,454 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:10,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:10,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:10,455 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:10,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:10,463 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:10,463 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:10,463 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:10,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:11:10,514 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-09-05 12:11:10,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:10,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:10,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:10,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-09-05 12:11:10,890 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-05 12:11:10,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-05 12:11:10,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-09-05 12:11:10,891 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-09-05 12:11:11,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:11,272 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-09-05 12:11:11,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-05 12:11:11,272 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-09-05 12:11:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:11,273 INFO L225 Difference]: With dead ends: 35 [2019-09-05 12:11:11,273 INFO L226 Difference]: Without dead ends: 32 [2019-09-05 12:11:11,274 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:11:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-05 12:11:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-05 12:11:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-05 12:11:11,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-09-05 12:11:11,280 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-09-05 12:11:11,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:11,280 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-09-05 12:11:11,280 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-05 12:11:11,281 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-09-05 12:11:11,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-05 12:11:11,281 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:11,281 INFO L399 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:11,282 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:11,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:11,282 INFO L82 PathProgramCache]: Analyzing trace with hash 583672391, now seen corresponding path program 20 times [2019-09-05 12:11:11,282 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:11,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:11,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:11,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:11,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:11,293 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:11,293 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:11,293 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 (exit command is (exit), workingDir is null) [2019-09-05 12:11:11,321 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:11,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:11:11,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:11,358 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-09-05 12:11:11,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:11,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:11,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:11,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-09-05 12:11:11,754 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-05 12:11:11,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-05 12:11:11,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-09-05 12:11:11,754 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-09-05 12:11:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:12,158 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-09-05 12:11:12,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-05 12:11:12,160 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-09-05 12:11:12,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:12,161 INFO L225 Difference]: With dead ends: 36 [2019-09-05 12:11:12,161 INFO L226 Difference]: Without dead ends: 33 [2019-09-05 12:11:12,161 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:11:12,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-05 12:11:12,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-05 12:11:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-05 12:11:12,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-09-05 12:11:12,172 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-09-05 12:11:12,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:12,172 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-09-05 12:11:12,172 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-05 12:11:12,172 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-09-05 12:11:12,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-05 12:11:12,173 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:12,173 INFO L399 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:12,173 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:12,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:12,174 INFO L82 PathProgramCache]: Analyzing trace with hash 913912464, now seen corresponding path program 21 times [2019-09-05 12:11:12,174 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:12,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:12,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:12,176 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:12,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:12,190 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:12,191 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:12,191 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 (exit command is (exit), workingDir is null) [2019-09-05 12:11:12,205 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:12,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-05 12:11:12,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:12,342 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-09-05 12:11:12,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:12,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:12,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:12,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-09-05 12:11:12,726 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-05 12:11:12,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-05 12:11:12,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-09-05 12:11:12,727 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-09-05 12:11:13,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:13,164 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-09-05 12:11:13,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-05 12:11:13,166 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-09-05 12:11:13,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:13,166 INFO L225 Difference]: With dead ends: 37 [2019-09-05 12:11:13,166 INFO L226 Difference]: Without dead ends: 34 [2019-09-05 12:11:13,167 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:11:13,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-05 12:11:13,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-09-05 12:11:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-05 12:11:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-09-05 12:11:13,172 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-09-05 12:11:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:13,173 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-09-05 12:11:13,173 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-05 12:11:13,173 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-09-05 12:11:13,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-05 12:11:13,173 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:13,174 INFO L399 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:13,174 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:13,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:13,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1733547161, now seen corresponding path program 22 times [2019-09-05 12:11:13,174 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:13,174 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:13,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:13,175 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:13,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:13,182 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:13,182 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:13,183 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 (exit command is (exit), workingDir is null) [2019-09-05 12:11:13,217 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:13,385 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:11:13,386 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:13,387 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-09-05 12:11:13,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:13,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:13,777 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:13,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:13,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-09-05 12:11:13,780 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-05 12:11:13,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-05 12:11:13,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-09-05 12:11:13,781 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-09-05 12:11:14,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:14,235 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-09-05 12:11:14,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-05 12:11:14,235 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-09-05 12:11:14,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:14,236 INFO L225 Difference]: With dead ends: 38 [2019-09-05 12:11:14,236 INFO L226 Difference]: Without dead ends: 35 [2019-09-05 12:11:14,237 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-09-05 12:11:14,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-05 12:11:14,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-09-05 12:11:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-05 12:11:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-09-05 12:11:14,244 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-09-05 12:11:14,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:14,245 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-09-05 12:11:14,245 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-05 12:11:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-09-05 12:11:14,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-05 12:11:14,245 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:14,245 INFO L399 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:14,246 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:14,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:14,246 INFO L82 PathProgramCache]: Analyzing trace with hash 2094550384, now seen corresponding path program 23 times [2019-09-05 12:11:14,246 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:14,246 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:14,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:14,247 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:14,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:14,253 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:14,254 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:14,254 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:14,268 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:11:14,307 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-05 12:11:14,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:14,309 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-05 12:11:14,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:14,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:14,745 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:14,745 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-09-05 12:11:14,745 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-05 12:11:14,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-05 12:11:14,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-09-05 12:11:14,746 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-09-05 12:11:15,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:15,253 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-09-05 12:11:15,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-05 12:11:15,254 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-09-05 12:11:15,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:15,254 INFO L225 Difference]: With dead ends: 39 [2019-09-05 12:11:15,255 INFO L226 Difference]: Without dead ends: 36 [2019-09-05 12:11:15,255 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:11:15,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-05 12:11:15,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-05 12:11:15,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-05 12:11:15,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-09-05 12:11:15,260 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-09-05 12:11:15,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:15,260 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-09-05 12:11:15,261 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-05 12:11:15,261 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-09-05 12:11:15,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-05 12:11:15,261 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:15,261 INFO L399 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:15,261 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:15,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:15,262 INFO L82 PathProgramCache]: Analyzing trace with hash 506489991, now seen corresponding path program 24 times [2019-09-05 12:11:15,262 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:15,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:15,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:15,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:15,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:15,269 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:15,270 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:15,270 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:15,283 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:11:15,346 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-05 12:11:15,346 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:15,348 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-09-05 12:11:15,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:15,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:15,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:15,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-09-05 12:11:15,819 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-05 12:11:15,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-05 12:11:15,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-09-05 12:11:15,820 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-09-05 12:11:16,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:16,399 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-09-05 12:11:16,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-05 12:11:16,400 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-09-05 12:11:16,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:16,400 INFO L225 Difference]: With dead ends: 40 [2019-09-05 12:11:16,400 INFO L226 Difference]: Without dead ends: 37 [2019-09-05 12:11:16,401 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-09-05 12:11:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-05 12:11:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-09-05 12:11:16,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-05 12:11:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-09-05 12:11:16,407 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-09-05 12:11:16,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:16,407 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-09-05 12:11:16,408 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-05 12:11:16,408 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-09-05 12:11:16,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-05 12:11:16,408 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:16,408 INFO L399 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:16,408 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:16,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:16,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1478741936, now seen corresponding path program 25 times [2019-09-05 12:11:16,409 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:16,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:16,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:16,410 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:16,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:16,417 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:16,417 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:16,417 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:16,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:11:16,469 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-09-05 12:11:16,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:16,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:16,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:16,974 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-09-05 12:11:16,974 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-05 12:11:16,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-05 12:11:16,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-09-05 12:11:16,975 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-09-05 12:11:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:17,541 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-09-05 12:11:17,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-05 12:11:17,542 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-09-05 12:11:17,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:17,542 INFO L225 Difference]: With dead ends: 41 [2019-09-05 12:11:17,543 INFO L226 Difference]: Without dead ends: 38 [2019-09-05 12:11:17,544 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-09-05 12:11:17,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-05 12:11:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-05 12:11:17,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-05 12:11:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-09-05 12:11:17,549 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-09-05 12:11:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:17,549 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-09-05 12:11:17,549 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-05 12:11:17,549 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-09-05 12:11:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-05 12:11:17,550 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:17,550 INFO L399 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:17,550 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:17,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1403577767, now seen corresponding path program 26 times [2019-09-05 12:11:17,551 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:17,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:17,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:17,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:17,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:17,558 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:17,559 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:17,559 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:17,592 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:11:17,633 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:11:17,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:17,635 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-09-05 12:11:17,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:18,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:18,107 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:18,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-09-05 12:11:18,108 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-05 12:11:18,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-05 12:11:18,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-09-05 12:11:18,110 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-09-05 12:11:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:18,740 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-09-05 12:11:18,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-05 12:11:18,740 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-09-05 12:11:18,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:18,741 INFO L225 Difference]: With dead ends: 42 [2019-09-05 12:11:18,741 INFO L226 Difference]: Without dead ends: 39 [2019-09-05 12:11:18,742 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-09-05 12:11:18,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-05 12:11:18,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-05 12:11:18,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-05 12:11:18,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-09-05 12:11:18,747 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-09-05 12:11:18,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:18,747 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-09-05 12:11:18,747 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-05 12:11:18,747 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-09-05 12:11:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-05 12:11:18,748 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:18,748 INFO L399 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:18,748 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:18,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:18,748 INFO L82 PathProgramCache]: Analyzing trace with hash 561175344, now seen corresponding path program 27 times [2019-09-05 12:11:18,748 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:18,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:18,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:18,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:18,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:18,756 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:18,756 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:18,757 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:18,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:11:19,099 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-05 12:11:19,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:19,102 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-05 12:11:19,103 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:19,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:19,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:19,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-09-05 12:11:19,646 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-05 12:11:19,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-05 12:11:19,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-09-05 12:11:19,647 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-09-05 12:11:20,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:20,350 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-09-05 12:11:20,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-05 12:11:20,350 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-09-05 12:11:20,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:20,350 INFO L225 Difference]: With dead ends: 43 [2019-09-05 12:11:20,350 INFO L226 Difference]: Without dead ends: 40 [2019-09-05 12:11:20,351 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-09-05 12:11:20,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-05 12:11:20,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-09-05 12:11:20,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-05 12:11:20,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-09-05 12:11:20,357 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-09-05 12:11:20,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:20,357 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-09-05 12:11:20,357 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-05 12:11:20,357 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-09-05 12:11:20,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-05 12:11:20,358 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:20,358 INFO L399 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:20,358 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:20,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:20,358 INFO L82 PathProgramCache]: Analyzing trace with hash 216504007, now seen corresponding path program 28 times [2019-09-05 12:11:20,359 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:20,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:20,359 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:20,359 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:20,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:20,366 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:20,366 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:20,367 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:20,396 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:11:20,612 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:11:20,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:20,619 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-05 12:11:20,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:21,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:21,239 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:21,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:21,243 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-09-05 12:11:21,243 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-05 12:11:21,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-05 12:11:21,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-09-05 12:11:21,243 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-09-05 12:11:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:21,967 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-09-05 12:11:21,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-05 12:11:21,968 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-09-05 12:11:21,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:21,968 INFO L225 Difference]: With dead ends: 44 [2019-09-05 12:11:21,968 INFO L226 Difference]: Without dead ends: 41 [2019-09-05 12:11:21,969 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-09-05 12:11:21,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-05 12:11:21,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-05 12:11:21,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-05 12:11:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-09-05 12:11:21,975 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-09-05 12:11:21,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:21,975 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-09-05 12:11:21,975 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-05 12:11:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-09-05 12:11:21,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-05 12:11:21,976 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:21,976 INFO L399 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:21,976 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:21,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1878372848, now seen corresponding path program 29 times [2019-09-05 12:11:21,976 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:21,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:21,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:21,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:21,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:21,984 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:21,984 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:21,984 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:22,005 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:11:22,062 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-09-05 12:11:22,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:22,064 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-09-05 12:11:22,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:22,630 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:22,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:22,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-09-05 12:11:22,666 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-05 12:11:22,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-05 12:11:22,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-09-05 12:11:22,667 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-09-05 12:11:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:23,479 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-09-05 12:11:23,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-09-05 12:11:23,480 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-09-05 12:11:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:23,480 INFO L225 Difference]: With dead ends: 45 [2019-09-05 12:11:23,480 INFO L226 Difference]: Without dead ends: 42 [2019-09-05 12:11:23,481 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-09-05 12:11:23,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-05 12:11:23,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-09-05 12:11:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-05 12:11:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-09-05 12:11:23,485 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-09-05 12:11:23,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:23,485 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-09-05 12:11:23,486 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-05 12:11:23,486 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-09-05 12:11:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-05 12:11:23,486 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:23,486 INFO L399 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:23,486 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:23,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:23,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1899921383, now seen corresponding path program 30 times [2019-09-05 12:11:23,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:23,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:23,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:23,487 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:23,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:23,494 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:23,494 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:23,494 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 (exit command is (exit), workingDir is null) [2019-09-05 12:11:23,511 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:23,640 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-05 12:11:23,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:23,644 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-09-05 12:11:23,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:24,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:24,264 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:24,264 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-09-05 12:11:24,264 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-05 12:11:24,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-05 12:11:24,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-09-05 12:11:24,265 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-09-05 12:11:25,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:25,108 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-09-05 12:11:25,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-05 12:11:25,113 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-09-05 12:11:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:25,114 INFO L225 Difference]: With dead ends: 46 [2019-09-05 12:11:25,114 INFO L226 Difference]: Without dead ends: 43 [2019-09-05 12:11:25,115 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-09-05 12:11:25,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-05 12:11:25,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-05 12:11:25,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-05 12:11:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-09-05 12:11:25,120 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-09-05 12:11:25,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:25,120 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-09-05 12:11:25,120 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-05 12:11:25,120 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-09-05 12:11:25,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-05 12:11:25,121 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:25,121 INFO L399 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:25,121 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:25,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:25,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1232041744, now seen corresponding path program 31 times [2019-09-05 12:11:25,121 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:25,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:25,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:25,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:25,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:25,129 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:25,130 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:25,130 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:11:25,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:11:25,207 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-09-05 12:11:25,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:25,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:25,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:25,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-09-05 12:11:25,858 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-05 12:11:25,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-05 12:11:25,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-09-05 12:11:25,860 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-09-05 12:11:26,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:26,692 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-09-05 12:11:26,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-05 12:11:26,693 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-09-05 12:11:26,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:26,694 INFO L225 Difference]: With dead ends: 47 [2019-09-05 12:11:26,694 INFO L226 Difference]: Without dead ends: 44 [2019-09-05 12:11:26,695 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-09-05 12:11:26,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-05 12:11:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-05 12:11:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-05 12:11:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-09-05 12:11:26,700 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-09-05 12:11:26,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:26,700 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-09-05 12:11:26,700 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-05 12:11:26,701 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-09-05 12:11:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-05 12:11:26,701 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:26,701 INFO L399 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:26,701 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:26,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:26,702 INFO L82 PathProgramCache]: Analyzing trace with hash 461349127, now seen corresponding path program 32 times [2019-09-05 12:11:26,702 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:26,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:26,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:26,702 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:26,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:26,708 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:26,709 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:26,709 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 (exit command is (exit), workingDir is null) [2019-09-05 12:11:26,727 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:26,777 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:11:26,777 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:26,779 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-09-05 12:11:26,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:27,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:27,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:27,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-09-05 12:11:27,467 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-05 12:11:27,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-05 12:11:27,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-09-05 12:11:27,468 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-09-05 12:11:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:28,371 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-09-05 12:11:28,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-05 12:11:28,372 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-09-05 12:11:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:28,373 INFO L225 Difference]: With dead ends: 48 [2019-09-05 12:11:28,373 INFO L226 Difference]: Without dead ends: 45 [2019-09-05 12:11:28,375 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-09-05 12:11:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-05 12:11:28,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-05 12:11:28,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-05 12:11:28,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-09-05 12:11:28,378 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-09-05 12:11:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:28,379 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-09-05 12:11:28,379 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-05 12:11:28,379 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-09-05 12:11:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-05 12:11:28,379 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:28,380 INFO L399 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:28,380 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:28,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1416858576, now seen corresponding path program 33 times [2019-09-05 12:11:28,380 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:28,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:28,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:28,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:28,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:28,387 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:28,388 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:28,388 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:28,405 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:11:29,528 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-05 12:11:29,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:29,531 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-09-05 12:11:29,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:30,250 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:30,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:30,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-09-05 12:11:30,289 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-05 12:11:30,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-05 12:11:30,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-09-05 12:11:30,290 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-09-05 12:11:31,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:31,267 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-09-05 12:11:31,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-05 12:11:31,267 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-09-05 12:11:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:31,268 INFO L225 Difference]: With dead ends: 49 [2019-09-05 12:11:31,268 INFO L226 Difference]: Without dead ends: 46 [2019-09-05 12:11:31,268 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-09-05 12:11:31,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-05 12:11:31,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-09-05 12:11:31,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-05 12:11:31,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-09-05 12:11:31,272 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-09-05 12:11:31,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:31,272 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-09-05 12:11:31,272 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-05 12:11:31,272 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-09-05 12:11:31,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-05 12:11:31,272 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:31,273 INFO L399 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:31,273 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:31,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:31,273 INFO L82 PathProgramCache]: Analyzing trace with hash 972880423, now seen corresponding path program 34 times [2019-09-05 12:11:31,273 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:31,273 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:31,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:31,274 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:31,274 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:31,283 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:31,283 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:31,283 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:31,294 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:11:31,562 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:11:31,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:31,564 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-09-05 12:11:31,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:32,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:32,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:32,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-09-05 12:11:32,351 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-05 12:11:32,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-05 12:11:32,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-09-05 12:11:32,352 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-09-05 12:11:33,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:33,408 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-09-05 12:11:33,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-05 12:11:33,408 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-09-05 12:11:33,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:33,409 INFO L225 Difference]: With dead ends: 50 [2019-09-05 12:11:33,409 INFO L226 Difference]: Without dead ends: 47 [2019-09-05 12:11:33,409 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-09-05 12:11:33,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-05 12:11:33,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-09-05 12:11:33,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-05 12:11:33,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-09-05 12:11:33,414 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-09-05 12:11:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:33,414 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-09-05 12:11:33,414 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-05 12:11:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-09-05 12:11:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-05 12:11:33,415 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:33,415 INFO L399 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:33,415 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:33,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:33,415 INFO L82 PathProgramCache]: Analyzing trace with hash 94459568, now seen corresponding path program 35 times [2019-09-05 12:11:33,416 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:33,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:33,416 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:33,416 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:33,417 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:33,423 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:33,423 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:33,423 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 (exit command is (exit), workingDir is null) [2019-09-05 12:11:33,450 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:33,511 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-05 12:11:33,511 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:33,514 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-09-05 12:11:33,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:34,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:34,304 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:34,307 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:34,307 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-09-05 12:11:34,308 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-05 12:11:34,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-05 12:11:34,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-09-05 12:11:34,308 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-09-05 12:11:35,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:35,417 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-09-05 12:11:35,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-05 12:11:35,418 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-09-05 12:11:35,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:35,418 INFO L225 Difference]: With dead ends: 51 [2019-09-05 12:11:35,418 INFO L226 Difference]: Without dead ends: 48 [2019-09-05 12:11:35,419 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-09-05 12:11:35,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-05 12:11:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-09-05 12:11:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-05 12:11:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-09-05 12:11:35,424 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-09-05 12:11:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:35,424 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-09-05 12:11:35,425 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-05 12:11:35,425 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-09-05 12:11:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-05 12:11:35,425 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:35,425 INFO L399 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:35,426 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:35,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:35,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1366783161, now seen corresponding path program 36 times [2019-09-05 12:11:35,426 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:35,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:35,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:35,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:35,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:35,433 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:35,434 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:35,434 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 (exit command is (exit), workingDir is null) [2019-09-05 12:11:35,450 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:35,650 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-05 12:11:35,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:35,653 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-09-05 12:11:35,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:36,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:36,443 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:36,444 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-09-05 12:11:36,444 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-05 12:11:36,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-05 12:11:36,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-09-05 12:11:36,445 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-09-05 12:11:37,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:37,540 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-09-05 12:11:37,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-05 12:11:37,540 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-09-05 12:11:37,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:37,541 INFO L225 Difference]: With dead ends: 52 [2019-09-05 12:11:37,541 INFO L226 Difference]: Without dead ends: 49 [2019-09-05 12:11:37,542 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-09-05 12:11:37,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-05 12:11:37,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-09-05 12:11:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-05 12:11:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-09-05 12:11:37,547 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-09-05 12:11:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:37,547 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-09-05 12:11:37,547 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-05 12:11:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-09-05 12:11:37,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-05 12:11:37,548 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:37,548 INFO L399 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:37,548 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:37,549 INFO L82 PathProgramCache]: Analyzing trace with hash 579332496, now seen corresponding path program 37 times [2019-09-05 12:11:37,549 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:37,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:37,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:37,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:37,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:37,564 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:37,564 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:37,564 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:37,577 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:11:37,653 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-09-05 12:11:37,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:38,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:38,706 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:38,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:38,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-09-05 12:11:38,710 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-05 12:11:38,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-05 12:11:38,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-09-05 12:11:38,711 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-09-05 12:11:39,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:39,850 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-09-05 12:11:39,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-05 12:11:39,851 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-09-05 12:11:39,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:39,851 INFO L225 Difference]: With dead ends: 53 [2019-09-05 12:11:39,852 INFO L226 Difference]: Without dead ends: 50 [2019-09-05 12:11:39,853 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-09-05 12:11:39,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-05 12:11:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-09-05 12:11:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-05 12:11:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-09-05 12:11:39,857 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-09-05 12:11:39,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:39,858 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-09-05 12:11:39,858 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-05 12:11:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-09-05 12:11:39,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-05 12:11:39,858 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:39,858 INFO L399 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:39,859 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:39,859 INFO L82 PathProgramCache]: Analyzing trace with hash 779375719, now seen corresponding path program 38 times [2019-09-05 12:11:39,859 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:39,859 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:39,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:39,860 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:39,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:39,867 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:39,867 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:39,867 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:11:39,891 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:39,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:11:39,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:39,951 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-09-05 12:11:39,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:40,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:40,815 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:40,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-09-05 12:11:40,815 INFO L454 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-09-05 12:11:40,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-09-05 12:11:40,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-09-05 12:11:40,817 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-09-05 12:11:42,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:42,074 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-09-05 12:11:42,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-05 12:11:42,075 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-09-05 12:11:42,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:42,075 INFO L225 Difference]: With dead ends: 54 [2019-09-05 12:11:42,075 INFO L226 Difference]: Without dead ends: 51 [2019-09-05 12:11:42,076 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-09-05 12:11:42,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-05 12:11:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-05 12:11:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-05 12:11:42,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-09-05 12:11:42,082 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-09-05 12:11:42,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:42,082 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-09-05 12:11:42,082 INFO L476 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-09-05 12:11:42,082 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-09-05 12:11:42,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-05 12:11:42,083 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:42,083 INFO L399 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:42,083 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:42,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:42,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1609218960, now seen corresponding path program 39 times [2019-09-05 12:11:42,084 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:42,084 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:42,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:42,086 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:42,086 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:42,094 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:42,094 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:42,094 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:42,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:11:43,431 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-09-05 12:11:43,431 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:43,435 WARN L254 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 167 conjunts are in the unsatisfiable core [2019-09-05 12:11:43,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:44,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:44,368 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:44,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-09-05 12:11:44,369 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-05 12:11:44,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-05 12:11:44,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-09-05 12:11:44,369 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states. [2019-09-05 12:11:45,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:45,675 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-09-05 12:11:45,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-05 12:11:45,676 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 50 [2019-09-05 12:11:45,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:45,676 INFO L225 Difference]: With dead ends: 55 [2019-09-05 12:11:45,677 INFO L226 Difference]: Without dead ends: 52 [2019-09-05 12:11:45,678 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2019-09-05 12:11:45,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-05 12:11:45,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-05 12:11:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-05 12:11:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-09-05 12:11:45,683 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2019-09-05 12:11:45,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:45,683 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-09-05 12:11:45,683 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-05 12:11:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-09-05 12:11:45,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-05 12:11:45,684 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:45,684 INFO L399 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:45,684 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:45,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1653757319, now seen corresponding path program 40 times [2019-09-05 12:11:45,684 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:45,685 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:45,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:45,685 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:45,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:45,692 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:45,692 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:45,692 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:45,704 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:11:46,045 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:11:46,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:46,056 WARN L254 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 171 conjunts are in the unsatisfiable core [2019-09-05 12:11:46,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:46,979 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:47,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:47,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2019-09-05 12:11:47,023 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-05 12:11:47,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-05 12:11:47,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2019-09-05 12:11:47,024 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 44 states. [2019-09-05 12:11:48,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:48,344 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2019-09-05 12:11:48,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-05 12:11:48,345 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 51 [2019-09-05 12:11:48,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:48,346 INFO L225 Difference]: With dead ends: 56 [2019-09-05 12:11:48,346 INFO L226 Difference]: Without dead ends: 53 [2019-09-05 12:11:48,347 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2019-09-05 12:11:48,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-05 12:11:48,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-09-05 12:11:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-05 12:11:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-09-05 12:11:48,353 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2019-09-05 12:11:48,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:48,353 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-09-05 12:11:48,353 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-05 12:11:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-09-05 12:11:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-05 12:11:48,354 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:48,354 INFO L399 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:48,354 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:48,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:48,354 INFO L82 PathProgramCache]: Analyzing trace with hash -273193136, now seen corresponding path program 41 times [2019-09-05 12:11:48,355 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:48,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:48,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:48,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:48,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:48,363 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:48,363 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:48,363 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:48,391 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:11:48,477 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2019-09-05 12:11:48,477 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:48,480 WARN L254 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 175 conjunts are in the unsatisfiable core [2019-09-05 12:11:48,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:50,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:50,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:50,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-09-05 12:11:50,087 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-05 12:11:50,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-05 12:11:50,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-09-05 12:11:50,088 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 45 states. [2019-09-05 12:11:51,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:51,484 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-09-05 12:11:51,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-05 12:11:51,485 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 52 [2019-09-05 12:11:51,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:51,486 INFO L225 Difference]: With dead ends: 57 [2019-09-05 12:11:51,486 INFO L226 Difference]: Without dead ends: 54 [2019-09-05 12:11:51,487 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2019-09-05 12:11:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-05 12:11:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-09-05 12:11:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-05 12:11:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-09-05 12:11:51,492 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2019-09-05 12:11:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:51,493 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-09-05 12:11:51,493 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-05 12:11:51,493 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-09-05 12:11:51,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-05 12:11:51,493 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:51,493 INFO L399 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:51,493 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:51,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:51,494 INFO L82 PathProgramCache]: Analyzing trace with hash 120884903, now seen corresponding path program 42 times [2019-09-05 12:11:51,494 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:51,494 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:51,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:51,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:51,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:51,501 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:51,501 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:51,501 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:51,514 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:11:52,009 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-09-05 12:11:52,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:52,012 WARN L254 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 179 conjunts are in the unsatisfiable core [2019-09-05 12:11:52,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:53,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:53,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:53,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2019-09-05 12:11:53,059 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-05 12:11:53,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-05 12:11:53,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2019-09-05 12:11:53,060 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 46 states. [2019-09-05 12:11:54,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:54,550 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2019-09-05 12:11:54,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-05 12:11:54,551 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 53 [2019-09-05 12:11:54,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:54,551 INFO L225 Difference]: With dead ends: 58 [2019-09-05 12:11:54,551 INFO L226 Difference]: Without dead ends: 55 [2019-09-05 12:11:54,552 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2019-09-05 12:11:54,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-05 12:11:54,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-09-05 12:11:54,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-05 12:11:54,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-09-05 12:11:54,557 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2019-09-05 12:11:54,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:54,557 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-09-05 12:11:54,558 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-05 12:11:54,558 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-09-05 12:11:54,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-05 12:11:54,558 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:54,558 INFO L399 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:54,558 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:54,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:54,559 INFO L82 PathProgramCache]: Analyzing trace with hash -547597776, now seen corresponding path program 43 times [2019-09-05 12:11:54,559 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:54,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:54,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:54,559 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:11:54,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:54,566 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:54,566 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:54,566 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:11:54,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:11:54,666 WARN L254 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 183 conjunts are in the unsatisfiable core [2019-09-05 12:11:54,667 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:55,748 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:55,797 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:55,797 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-09-05 12:11:55,798 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-05 12:11:55,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-05 12:11:55,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2019-09-05 12:11:55,798 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 47 states. [2019-09-05 12:11:57,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:11:57,390 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-09-05 12:11:57,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-05 12:11:57,391 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 54 [2019-09-05 12:11:57,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:11:57,391 INFO L225 Difference]: With dead ends: 59 [2019-09-05 12:11:57,391 INFO L226 Difference]: Without dead ends: 56 [2019-09-05 12:11:57,392 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2019-09-05 12:11:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-09-05 12:11:57,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-09-05 12:11:57,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-05 12:11:57,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-09-05 12:11:57,397 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2019-09-05 12:11:57,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:11:57,397 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-09-05 12:11:57,397 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-05 12:11:57,397 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-09-05 12:11:57,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-05 12:11:57,397 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:11:57,398 INFO L399 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:11:57,398 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:11:57,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:11:57,398 INFO L82 PathProgramCache]: Analyzing trace with hash 204275655, now seen corresponding path program 44 times [2019-09-05 12:11:57,398 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:11:57,398 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:11:57,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:57,399 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:11:57,399 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:11:57,405 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:11:57,405 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:11:57,405 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:11:57,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:11:57,501 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:11:57,501 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:11:57,504 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 187 conjunts are in the unsatisfiable core [2019-09-05 12:11:57,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:11:58,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:11:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:11:58,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:11:58,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2019-09-05 12:11:58,753 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-05 12:11:58,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-05 12:11:58,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2019-09-05 12:11:58,754 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 48 states. [2019-09-05 12:12:00,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:00,395 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-09-05 12:12:00,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-05 12:12:00,396 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 55 [2019-09-05 12:12:00,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:00,396 INFO L225 Difference]: With dead ends: 60 [2019-09-05 12:12:00,396 INFO L226 Difference]: Without dead ends: 57 [2019-09-05 12:12:00,397 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2019-09-05 12:12:00,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-05 12:12:00,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-09-05 12:12:00,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-05 12:12:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-09-05 12:12:00,402 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2019-09-05 12:12:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:00,403 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-09-05 12:12:00,403 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-05 12:12:00,403 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-09-05 12:12:00,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-05 12:12:00,403 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:00,403 INFO L399 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:00,404 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:00,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:00,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2037515536, now seen corresponding path program 45 times [2019-09-05 12:12:00,404 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:00,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:00,404 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:00,405 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:00,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:00,411 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:00,411 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:00,411 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:12:00,447 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:02,948 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-09-05 12:12:02,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:02,952 WARN L254 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 191 conjunts are in the unsatisfiable core [2019-09-05 12:12:02,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:04,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:04,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:04,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-09-05 12:12:04,136 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-05 12:12:04,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-05 12:12:04,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2019-09-05 12:12:04,137 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 49 states. [2019-09-05 12:12:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:05,845 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-09-05 12:12:05,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-05 12:12:05,845 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 56 [2019-09-05 12:12:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:05,845 INFO L225 Difference]: With dead ends: 61 [2019-09-05 12:12:05,845 INFO L226 Difference]: Without dead ends: 58 [2019-09-05 12:12:05,846 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2019-09-05 12:12:05,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-05 12:12:05,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-09-05 12:12:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-05 12:12:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-09-05 12:12:05,851 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2019-09-05 12:12:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:05,851 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-09-05 12:12:05,851 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-05 12:12:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-09-05 12:12:05,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-05 12:12:05,852 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:05,852 INFO L399 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:05,852 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:05,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:05,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1261590297, now seen corresponding path program 46 times [2019-09-05 12:12:05,852 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:05,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:05,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:05,853 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:05,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:05,859 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:05,859 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:05,859 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:05,869 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:12:06,292 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:12:06,293 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:06,296 WARN L254 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 195 conjunts are in the unsatisfiable core [2019-09-05 12:12:06,297 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:07,440 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:07,494 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:07,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2019-09-05 12:12:07,495 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-05 12:12:07,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-05 12:12:07,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2019-09-05 12:12:07,495 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 50 states. [2019-09-05 12:12:09,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:09,216 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2019-09-05 12:12:09,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-05 12:12:09,216 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 57 [2019-09-05 12:12:09,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:09,217 INFO L225 Difference]: With dead ends: 62 [2019-09-05 12:12:09,217 INFO L226 Difference]: Without dead ends: 59 [2019-09-05 12:12:09,218 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2019-09-05 12:12:09,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-05 12:12:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-05 12:12:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-05 12:12:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-09-05 12:12:09,224 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2019-09-05 12:12:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:09,224 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-09-05 12:12:09,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-05 12:12:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-09-05 12:12:09,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-05 12:12:09,225 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:09,225 INFO L399 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:09,225 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:09,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:09,226 INFO L82 PathProgramCache]: Analyzing trace with hash -454656016, now seen corresponding path program 47 times [2019-09-05 12:12:09,226 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:09,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:09,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:09,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:09,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:09,232 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:09,232 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:09,232 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:09,242 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:12:09,351 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-09-05 12:12:09,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:09,355 WARN L254 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 199 conjunts are in the unsatisfiable core [2019-09-05 12:12:09,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:10,619 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:10,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:10,674 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-09-05 12:12:10,675 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-05 12:12:10,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-05 12:12:10,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2019-09-05 12:12:10,675 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 51 states. [2019-09-05 12:12:12,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:12,504 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-09-05 12:12:12,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-05 12:12:12,504 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 58 [2019-09-05 12:12:12,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:12,505 INFO L225 Difference]: With dead ends: 63 [2019-09-05 12:12:12,505 INFO L226 Difference]: Without dead ends: 60 [2019-09-05 12:12:12,506 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2019-09-05 12:12:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-05 12:12:12,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-09-05 12:12:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-05 12:12:12,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2019-09-05 12:12:12,512 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2019-09-05 12:12:12,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:12,513 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2019-09-05 12:12:12,513 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-05 12:12:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2019-09-05 12:12:12,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-05 12:12:12,513 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:12,513 INFO L399 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:12,513 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:12,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1209497081, now seen corresponding path program 48 times [2019-09-05 12:12:12,514 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:12,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:12,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:12,515 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:12,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:12,521 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:12,522 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:12,522 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:12,540 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:12:13,176 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-05 12:12:13,177 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:13,180 WARN L254 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 203 conjunts are in the unsatisfiable core [2019-09-05 12:12:13,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:14,440 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:14,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:14,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2019-09-05 12:12:14,495 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-05 12:12:14,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-05 12:12:14,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2019-09-05 12:12:14,496 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 52 states. [2019-09-05 12:12:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:16,368 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-09-05 12:12:16,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-05 12:12:16,368 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 59 [2019-09-05 12:12:16,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:16,369 INFO L225 Difference]: With dead ends: 64 [2019-09-05 12:12:16,370 INFO L226 Difference]: Without dead ends: 61 [2019-09-05 12:12:16,370 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2019-09-05 12:12:16,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-05 12:12:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-09-05 12:12:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-05 12:12:16,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-09-05 12:12:16,377 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2019-09-05 12:12:16,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:16,377 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-09-05 12:12:16,377 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-05 12:12:16,377 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-09-05 12:12:16,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-09-05 12:12:16,378 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:16,378 INFO L399 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:16,378 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:16,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:16,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1160233680, now seen corresponding path program 49 times [2019-09-05 12:12:16,379 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:16,379 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:16,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:16,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:16,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:16,386 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:16,386 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:16,386 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:16,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:12:16,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:12:16,500 WARN L254 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 207 conjunts are in the unsatisfiable core [2019-09-05 12:12:16,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:17,847 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:17,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:17,902 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:17,903 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-09-05 12:12:17,903 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-05 12:12:17,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-05 12:12:17,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2019-09-05 12:12:17,904 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 53 states. [2019-09-05 12:12:19,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:19,921 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-09-05 12:12:19,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-05 12:12:19,921 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 60 [2019-09-05 12:12:19,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:19,922 INFO L225 Difference]: With dead ends: 65 [2019-09-05 12:12:19,922 INFO L226 Difference]: Without dead ends: 62 [2019-09-05 12:12:19,922 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2019-09-05 12:12:19,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-05 12:12:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-09-05 12:12:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-05 12:12:19,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2019-09-05 12:12:19,929 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2019-09-05 12:12:19,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:19,929 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2019-09-05 12:12:19,929 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-05 12:12:19,930 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2019-09-05 12:12:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-05 12:12:19,930 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:19,930 INFO L399 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:19,930 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:19,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:19,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1607443239, now seen corresponding path program 50 times [2019-09-05 12:12:19,931 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:19,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:19,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:19,932 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:12:19,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:19,939 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:19,939 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:19,939 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:19,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:12:20,056 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:12:20,056 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:20,060 WARN L254 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 211 conjunts are in the unsatisfiable core [2019-09-05 12:12:20,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:21,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:21,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:21,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2019-09-05 12:12:21,505 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-05 12:12:21,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-05 12:12:21,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2019-09-05 12:12:21,506 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 54 states. [2019-09-05 12:12:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:23,520 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-09-05 12:12:23,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-05 12:12:23,521 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 61 [2019-09-05 12:12:23,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:23,522 INFO L225 Difference]: With dead ends: 66 [2019-09-05 12:12:23,522 INFO L226 Difference]: Without dead ends: 63 [2019-09-05 12:12:23,523 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2019-09-05 12:12:23,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-05 12:12:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-05 12:12:23,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-05 12:12:23,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-09-05 12:12:23,529 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2019-09-05 12:12:23,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:23,529 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-09-05 12:12:23,529 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-05 12:12:23,530 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-09-05 12:12:23,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-05 12:12:23,530 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:23,530 INFO L399 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:23,530 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:23,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:23,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1708929616, now seen corresponding path program 51 times [2019-09-05 12:12:23,531 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:23,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:23,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:23,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:23,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:23,539 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:23,539 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:23,539 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:23,556 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:12:27,661 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2019-09-05 12:12:27,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:27,666 WARN L254 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 215 conjunts are in the unsatisfiable core [2019-09-05 12:12:27,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:29,069 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:29,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:29,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-09-05 12:12:29,127 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-05 12:12:29,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-05 12:12:29,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2019-09-05 12:12:29,129 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 55 states. [2019-09-05 12:12:31,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:31,251 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-09-05 12:12:31,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-05 12:12:31,251 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 62 [2019-09-05 12:12:31,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:31,252 INFO L225 Difference]: With dead ends: 67 [2019-09-05 12:12:31,252 INFO L226 Difference]: Without dead ends: 64 [2019-09-05 12:12:31,253 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2019-09-05 12:12:31,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-05 12:12:31,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-09-05 12:12:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-05 12:12:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-09-05 12:12:31,260 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2019-09-05 12:12:31,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:31,261 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-09-05 12:12:31,261 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-05 12:12:31,261 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-09-05 12:12:31,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-05 12:12:31,261 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:31,262 INFO L399 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:31,262 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:31,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:31,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1437273017, now seen corresponding path program 52 times [2019-09-05 12:12:31,262 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:31,262 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:31,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:31,263 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:31,263 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:31,271 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:31,271 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:31,271 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:31,298 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:12:31,888 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:12:31,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:31,892 WARN L254 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 219 conjunts are in the unsatisfiable core [2019-09-05 12:12:31,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:33,369 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:33,425 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:33,425 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2019-09-05 12:12:33,425 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-05 12:12:33,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-05 12:12:33,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2019-09-05 12:12:33,426 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 56 states. [2019-09-05 12:12:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:35,604 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2019-09-05 12:12:35,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-05 12:12:35,604 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 63 [2019-09-05 12:12:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:35,605 INFO L225 Difference]: With dead ends: 68 [2019-09-05 12:12:35,605 INFO L226 Difference]: Without dead ends: 65 [2019-09-05 12:12:35,605 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2019-09-05 12:12:35,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-05 12:12:35,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-09-05 12:12:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-05 12:12:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-09-05 12:12:35,610 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2019-09-05 12:12:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:35,611 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-09-05 12:12:35,611 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-05 12:12:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-09-05 12:12:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-05 12:12:35,611 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:35,611 INFO L399 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:35,612 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:35,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:35,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1605853040, now seen corresponding path program 53 times [2019-09-05 12:12:35,612 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:35,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:35,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:35,613 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:35,613 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:35,620 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:35,620 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:35,621 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:12:35,643 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:35,795 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-05 12:12:35,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:35,798 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 223 conjunts are in the unsatisfiable core [2019-09-05 12:12:35,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:37,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:37,339 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:37,339 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-09-05 12:12:37,340 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-05 12:12:37,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-05 12:12:37,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2019-09-05 12:12:37,340 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 57 states. [2019-09-05 12:12:39,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:39,588 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-09-05 12:12:39,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-09-05 12:12:39,588 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 64 [2019-09-05 12:12:39,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:39,589 INFO L225 Difference]: With dead ends: 69 [2019-09-05 12:12:39,589 INFO L226 Difference]: Without dead ends: 66 [2019-09-05 12:12:39,589 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2019-09-05 12:12:39,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-05 12:12:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-09-05 12:12:39,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-05 12:12:39,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2019-09-05 12:12:39,594 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2019-09-05 12:12:39,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:39,594 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2019-09-05 12:12:39,594 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-05 12:12:39,595 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2019-09-05 12:12:39,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-05 12:12:39,595 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:39,595 INFO L399 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:39,595 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:39,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:39,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1758100839, now seen corresponding path program 54 times [2019-09-05 12:12:39,596 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:39,596 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:39,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:39,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:39,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:39,604 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:39,604 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:39,604 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:39,619 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:12:40,834 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-09-05 12:12:40,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:40,840 WARN L254 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 227 conjunts are in the unsatisfiable core [2019-09-05 12:12:40,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:42,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:42,491 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:42,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2019-09-05 12:12:42,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-09-05 12:12:42,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-09-05 12:12:42,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2019-09-05 12:12:42,492 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 58 states. [2019-09-05 12:12:44,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:44,861 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2019-09-05 12:12:44,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-09-05 12:12:44,862 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 65 [2019-09-05 12:12:44,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:44,862 INFO L225 Difference]: With dead ends: 70 [2019-09-05 12:12:44,862 INFO L226 Difference]: Without dead ends: 67 [2019-09-05 12:12:44,863 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2019-09-05 12:12:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-05 12:12:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-09-05 12:12:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-05 12:12:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-09-05 12:12:44,870 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2019-09-05 12:12:44,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:44,870 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-09-05 12:12:44,870 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-09-05 12:12:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-09-05 12:12:44,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-05 12:12:44,871 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:44,871 INFO L399 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:44,871 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:44,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:44,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1333511312, now seen corresponding path program 55 times [2019-09-05 12:12:44,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:44,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:44,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:44,873 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:44,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:44,880 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:44,880 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:44,880 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:44,911 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:12:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:12:45,024 WARN L254 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 231 conjunts are in the unsatisfiable core [2019-09-05 12:12:45,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:47,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:47,121 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:47,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2019-09-05 12:12:47,122 INFO L454 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-09-05 12:12:47,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-09-05 12:12:47,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2019-09-05 12:12:47,123 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 59 states. [2019-09-05 12:12:49,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:49,591 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-09-05 12:12:49,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-09-05 12:12:49,591 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 66 [2019-09-05 12:12:49,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:49,592 INFO L225 Difference]: With dead ends: 71 [2019-09-05 12:12:49,592 INFO L226 Difference]: Without dead ends: 68 [2019-09-05 12:12:49,592 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2019-09-05 12:12:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-05 12:12:49,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-05 12:12:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-05 12:12:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2019-09-05 12:12:49,599 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2019-09-05 12:12:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:49,599 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2019-09-05 12:12:49,599 INFO L476 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-09-05 12:12:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2019-09-05 12:12:49,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-05 12:12:49,600 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:49,600 INFO L399 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:49,600 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:49,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1610759815, now seen corresponding path program 56 times [2019-09-05 12:12:49,601 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:49,601 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:49,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:49,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:12:49,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:49,609 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:49,609 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:49,609 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:49,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:12:49,745 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:12:49,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:12:49,749 WARN L254 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 235 conjunts are in the unsatisfiable core [2019-09-05 12:12:49,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:12:51,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:12:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:12:51,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:12:51,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2019-09-05 12:12:51,488 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-05 12:12:51,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-05 12:12:51,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2019-09-05 12:12:51,489 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 60 states. [2019-09-05 12:12:53,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:12:53,961 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2019-09-05 12:12:53,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-05 12:12:53,961 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 67 [2019-09-05 12:12:53,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:12:53,962 INFO L225 Difference]: With dead ends: 72 [2019-09-05 12:12:53,962 INFO L226 Difference]: Without dead ends: 69 [2019-09-05 12:12:53,963 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2019-09-05 12:12:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-05 12:12:53,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-09-05 12:12:53,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-05 12:12:53,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-09-05 12:12:53,968 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2019-09-05 12:12:53,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:12:53,969 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-09-05 12:12:53,969 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-05 12:12:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-09-05 12:12:53,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-05 12:12:53,969 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:12:53,969 INFO L399 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:12:53,969 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:12:53,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:12:53,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1606115760, now seen corresponding path program 57 times [2019-09-05 12:12:53,970 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:12:53,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:12:53,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:53,971 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:12:53,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:12:53,976 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:12:53,976 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:12:53,976 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:12:53,987 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:13:01,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-05 12:13:01,111 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:13:01,116 WARN L254 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 239 conjunts are in the unsatisfiable core [2019-09-05 12:13:01,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:02,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:02,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:02,936 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:02,936 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2019-09-05 12:13:02,937 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-05 12:13:02,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-05 12:13:02,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2019-09-05 12:13:02,938 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 61 states. [2019-09-05 12:13:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:05,489 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2019-09-05 12:13:05,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-05 12:13:05,490 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 68 [2019-09-05 12:13:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:05,491 INFO L225 Difference]: With dead ends: 73 [2019-09-05 12:13:05,491 INFO L226 Difference]: Without dead ends: 70 [2019-09-05 12:13:05,491 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2019-09-05 12:13:05,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-05 12:13:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-09-05 12:13:05,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-05 12:13:05,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2019-09-05 12:13:05,498 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2019-09-05 12:13:05,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:05,499 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2019-09-05 12:13:05,499 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-05 12:13:05,499 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2019-09-05 12:13:05,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-05 12:13:05,499 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:05,500 INFO L399 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:05,500 INFO L418 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:05,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:05,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1749956519, now seen corresponding path program 58 times [2019-09-05 12:13:05,500 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:05,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:05,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:05,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:05,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:05,510 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:05,510 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:05,510 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:13:05,524 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:13:06,135 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:13:06,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:13:06,139 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 243 conjunts are in the unsatisfiable core [2019-09-05 12:13:06,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:07,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:07,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:07,985 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2019-09-05 12:13:07,985 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-05 12:13:07,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-05 12:13:07,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2019-09-05 12:13:07,986 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand 62 states. [2019-09-05 12:13:10,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:10,698 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2019-09-05 12:13:10,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-05 12:13:10,699 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 69 [2019-09-05 12:13:10,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:10,699 INFO L225 Difference]: With dead ends: 74 [2019-09-05 12:13:10,700 INFO L226 Difference]: Without dead ends: 71 [2019-09-05 12:13:10,700 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2019-09-05 12:13:10,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-05 12:13:10,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-09-05 12:13:10,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-05 12:13:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-09-05 12:13:10,706 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2019-09-05 12:13:10,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:10,706 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-09-05 12:13:10,706 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-05 12:13:10,707 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-09-05 12:13:10,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-05 12:13:10,707 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:10,707 INFO L399 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:10,707 INFO L418 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:10,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:10,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1585985232, now seen corresponding path program 59 times [2019-09-05 12:13:10,708 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:10,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:10,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:10,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:10,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:10,715 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:10,715 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:10,715 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:13:10,755 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:13:10,926 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-09-05 12:13:10,926 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:13:10,931 WARN L254 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 247 conjunts are in the unsatisfiable core [2019-09-05 12:13:10,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:12,779 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:12,844 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:12,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2019-09-05 12:13:12,845 INFO L454 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-09-05 12:13:12,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-09-05 12:13:12,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2019-09-05 12:13:12,846 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 63 states. [2019-09-05 12:13:15,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:15,585 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-09-05 12:13:15,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-05 12:13:15,585 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 70 [2019-09-05 12:13:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:15,586 INFO L225 Difference]: With dead ends: 75 [2019-09-05 12:13:15,586 INFO L226 Difference]: Without dead ends: 72 [2019-09-05 12:13:15,587 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2019-09-05 12:13:15,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-09-05 12:13:15,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-09-05 12:13:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-05 12:13:15,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2019-09-05 12:13:15,593 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2019-09-05 12:13:15,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:15,593 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2019-09-05 12:13:15,593 INFO L476 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-09-05 12:13:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2019-09-05 12:13:15,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-09-05 12:13:15,594 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:15,594 INFO L399 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:15,594 INFO L418 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:15,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:15,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1920964409, now seen corresponding path program 60 times [2019-09-05 12:13:15,594 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:15,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:15,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:15,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:15,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:15,602 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:15,602 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:15,602 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:13:15,624 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:13:17,364 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-09-05 12:13:17,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:13:17,371 WARN L254 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 251 conjunts are in the unsatisfiable core [2019-09-05 12:13:17,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:19,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:19,335 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:19,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2019-09-05 12:13:19,336 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-09-05 12:13:19,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-09-05 12:13:19,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2019-09-05 12:13:19,337 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 64 states. [2019-09-05 12:13:22,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:22,234 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2019-09-05 12:13:22,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-09-05 12:13:22,234 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 71 [2019-09-05 12:13:22,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:22,235 INFO L225 Difference]: With dead ends: 76 [2019-09-05 12:13:22,235 INFO L226 Difference]: Without dead ends: 73 [2019-09-05 12:13:22,235 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2019-09-05 12:13:22,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-05 12:13:22,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-09-05 12:13:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-05 12:13:22,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-09-05 12:13:22,242 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2019-09-05 12:13:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:22,242 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-09-05 12:13:22,243 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-09-05 12:13:22,243 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-09-05 12:13:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-05 12:13:22,243 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:22,243 INFO L399 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:22,244 INFO L418 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:22,244 INFO L82 PathProgramCache]: Analyzing trace with hash 579582992, now seen corresponding path program 61 times [2019-09-05 12:13:22,244 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:22,244 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:22,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:22,245 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:22,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:22,252 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:22,253 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:22,253 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:13:22,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:13:22,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:13:22,428 WARN L254 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 255 conjunts are in the unsatisfiable core [2019-09-05 12:13:22,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:24,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:24,478 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:24,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2019-09-05 12:13:24,479 INFO L454 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-09-05 12:13:24,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-09-05 12:13:24,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2019-09-05 12:13:24,480 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 65 states. [2019-09-05 12:13:27,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:27,532 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2019-09-05 12:13:27,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-09-05 12:13:27,532 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 72 [2019-09-05 12:13:27,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:27,533 INFO L225 Difference]: With dead ends: 77 [2019-09-05 12:13:27,533 INFO L226 Difference]: Without dead ends: 74 [2019-09-05 12:13:27,533 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2019-09-05 12:13:27,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-05 12:13:27,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-09-05 12:13:27,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-05 12:13:27,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2019-09-05 12:13:27,540 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2019-09-05 12:13:27,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:27,541 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2019-09-05 12:13:27,541 INFO L476 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-09-05 12:13:27,541 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2019-09-05 12:13:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-05 12:13:27,541 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:27,542 INFO L399 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:27,542 INFO L418 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:27,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:27,542 INFO L82 PathProgramCache]: Analyzing trace with hash 787141095, now seen corresponding path program 62 times [2019-09-05 12:13:27,542 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:27,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:27,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:27,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:13:27,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:27,550 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:27,551 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:27,551 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:13:27,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:13:27,889 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:13:27,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:13:27,898 WARN L254 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 259 conjunts are in the unsatisfiable core [2019-09-05 12:13:27,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:30,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:30,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:30,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2019-09-05 12:13:30,089 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-09-05 12:13:30,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-09-05 12:13:30,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2019-09-05 12:13:30,089 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 66 states. [2019-09-05 12:13:33,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:33,130 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2019-09-05 12:13:33,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-05 12:13:33,131 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 73 [2019-09-05 12:13:33,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:33,131 INFO L225 Difference]: With dead ends: 78 [2019-09-05 12:13:33,131 INFO L226 Difference]: Without dead ends: 75 [2019-09-05 12:13:33,132 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2019-09-05 12:13:33,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-05 12:13:33,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-09-05 12:13:33,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-05 12:13:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-09-05 12:13:33,138 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2019-09-05 12:13:33,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:33,138 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-09-05 12:13:33,138 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-09-05 12:13:33,138 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-09-05 12:13:33,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-05 12:13:33,139 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:33,139 INFO L399 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:33,139 INFO L418 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:33,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:33,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1368492304, now seen corresponding path program 63 times [2019-09-05 12:13:33,139 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:33,140 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:33,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:33,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:33,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:33,146 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:33,146 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:33,146 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:13:33,157 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:13:45,026 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2019-09-05 12:13:45,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:13:45,032 WARN L254 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 263 conjunts are in the unsatisfiable core [2019-09-05 12:13:45,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:47,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:47,216 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:47,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2019-09-05 12:13:47,217 INFO L454 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-09-05 12:13:47,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-09-05 12:13:47,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2019-09-05 12:13:47,218 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 67 states. [2019-09-05 12:13:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:50,399 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-09-05 12:13:50,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-09-05 12:13:50,399 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 74 [2019-09-05 12:13:50,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:50,400 INFO L225 Difference]: With dead ends: 79 [2019-09-05 12:13:50,400 INFO L226 Difference]: Without dead ends: 76 [2019-09-05 12:13:50,401 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2019-09-05 12:13:50,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-05 12:13:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-09-05 12:13:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-05 12:13:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2019-09-05 12:13:50,408 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2019-09-05 12:13:50,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:50,409 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2019-09-05 12:13:50,409 INFO L476 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-09-05 12:13:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2019-09-05 12:13:50,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-05 12:13:50,409 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:50,409 INFO L399 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:50,410 INFO L418 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:50,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:50,410 INFO L82 PathProgramCache]: Analyzing trace with hash 526349063, now seen corresponding path program 64 times [2019-09-05 12:13:50,410 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:50,410 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:50,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:50,411 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:50,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:50,418 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:50,419 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:50,419 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:13:50,439 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:13:51,180 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:13:51,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:13:51,185 WARN L254 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 267 conjunts are in the unsatisfiable core [2019-09-05 12:13:51,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:53,300 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:53,379 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:53,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2019-09-05 12:13:53,379 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-05 12:13:53,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-05 12:13:53,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2019-09-05 12:13:53,380 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 68 states. [2019-09-05 12:13:56,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:13:56,578 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2019-09-05 12:13:56,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-09-05 12:13:56,578 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 75 [2019-09-05 12:13:56,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:13:56,579 INFO L225 Difference]: With dead ends: 80 [2019-09-05 12:13:56,580 INFO L226 Difference]: Without dead ends: 77 [2019-09-05 12:13:56,580 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=137, Invalid=4555, Unknown=0, NotChecked=0, Total=4692 [2019-09-05 12:13:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-05 12:13:56,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-09-05 12:13:56,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-05 12:13:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-09-05 12:13:56,588 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2019-09-05 12:13:56,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:13:56,589 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-09-05 12:13:56,589 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-05 12:13:56,589 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-09-05 12:13:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-05 12:13:56,589 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:13:56,589 INFO L399 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:13:56,590 INFO L418 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:13:56,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:13:56,590 INFO L82 PathProgramCache]: Analyzing trace with hash -863110704, now seen corresponding path program 65 times [2019-09-05 12:13:56,590 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:13:56,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:13:56,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:56,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:13:56,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:13:56,599 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:13:56,599 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:13:56,599 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:13:56,627 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:13:57,015 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-09-05 12:13:57,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:13:57,019 WARN L254 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 271 conjunts are in the unsatisfiable core [2019-09-05 12:13:57,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:13:59,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:13:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:13:59,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:13:59,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2019-09-05 12:13:59,348 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-09-05 12:13:59,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-09-05 12:13:59,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=4557, Unknown=0, NotChecked=0, Total=4692 [2019-09-05 12:13:59,348 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 69 states. [2019-09-05 12:14:02,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:02,729 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-09-05 12:14:02,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-09-05 12:14:02,729 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 76 [2019-09-05 12:14:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:02,730 INFO L225 Difference]: With dead ends: 81 [2019-09-05 12:14:02,730 INFO L226 Difference]: Without dead ends: 78 [2019-09-05 12:14:02,730 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=139, Invalid=4691, Unknown=0, NotChecked=0, Total=4830 [2019-09-05 12:14:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-05 12:14:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-09-05 12:14:02,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-05 12:14:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2019-09-05 12:14:02,738 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2019-09-05 12:14:02,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:02,738 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2019-09-05 12:14:02,738 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-09-05 12:14:02,739 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2019-09-05 12:14:02,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-09-05 12:14:02,739 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:02,739 INFO L399 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:02,739 INFO L418 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:02,740 INFO L82 PathProgramCache]: Analyzing trace with hash -986690521, now seen corresponding path program 66 times [2019-09-05 12:14:02,740 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:02,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:02,740 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:02,741 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:02,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:02,748 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:14:02,748 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:14:02,748 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:14:02,767 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:14:05,750 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2019-09-05 12:14:05,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:05,755 WARN L254 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 275 conjunts are in the unsatisfiable core [2019-09-05 12:14:05,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:08,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:14:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:08,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:14:08,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2019-09-05 12:14:08,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-05 12:14:08,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-05 12:14:08,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2019-09-05 12:14:08,160 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 70 states. [2019-09-05 12:14:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:11,596 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2019-09-05 12:14:11,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-05 12:14:11,596 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 77 [2019-09-05 12:14:11,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:11,597 INFO L225 Difference]: With dead ends: 82 [2019-09-05 12:14:11,598 INFO L226 Difference]: Without dead ends: 79 [2019-09-05 12:14:11,598 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=141, Invalid=4829, Unknown=0, NotChecked=0, Total=4970 [2019-09-05 12:14:11,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-05 12:14:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-05 12:14:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-05 12:14:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-09-05 12:14:11,606 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2019-09-05 12:14:11,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:11,606 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-09-05 12:14:11,606 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-05 12:14:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-09-05 12:14:11,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-05 12:14:11,607 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:11,607 INFO L399 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:11,607 INFO L418 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:11,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:11,608 INFO L82 PathProgramCache]: Analyzing trace with hash -522697552, now seen corresponding path program 67 times [2019-09-05 12:14:11,608 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:11,608 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:11,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:11,609 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:11,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:11,616 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:14:11,616 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:14:11,616 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:14:11,633 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:14:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:14:11,824 WARN L254 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 279 conjunts are in the unsatisfiable core [2019-09-05 12:14:11,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:14,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:14:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:14,285 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:14:14,285 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2019-09-05 12:14:14,286 INFO L454 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-09-05 12:14:14,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-09-05 12:14:14,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=4831, Unknown=0, NotChecked=0, Total=4970 [2019-09-05 12:14:14,286 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 71 states. [2019-09-05 12:14:17,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:17,821 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-09-05 12:14:17,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-09-05 12:14:17,821 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 78 [2019-09-05 12:14:17,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:17,822 INFO L225 Difference]: With dead ends: 83 [2019-09-05 12:14:17,823 INFO L226 Difference]: Without dead ends: 80 [2019-09-05 12:14:17,823 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=143, Invalid=4969, Unknown=0, NotChecked=0, Total=5112 [2019-09-05 12:14:17,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-05 12:14:17,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-09-05 12:14:17,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-05 12:14:17,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2019-09-05 12:14:17,832 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2019-09-05 12:14:17,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:17,832 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2019-09-05 12:14:17,832 INFO L476 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-09-05 12:14:17,832 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2019-09-05 12:14:17,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-05 12:14:17,833 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:17,833 INFO L399 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:17,833 INFO L418 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:17,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:17,834 INFO L82 PathProgramCache]: Analyzing trace with hash 976182599, now seen corresponding path program 68 times [2019-09-05 12:14:17,834 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:17,834 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:17,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:17,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:14:17,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:17,842 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:14:17,842 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:14:17,842 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:14:17,869 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:14:18,059 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:14:18,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:18,064 WARN L254 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 283 conjunts are in the unsatisfiable core [2019-09-05 12:14:18,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:20,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:14:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:20,517 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:14:20,517 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2019-09-05 12:14:20,517 INFO L454 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-09-05 12:14:20,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-09-05 12:14:20,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2019-09-05 12:14:20,518 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 72 states. [2019-09-05 12:14:24,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:24,159 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2019-09-05 12:14:24,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2019-09-05 12:14:24,159 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 79 [2019-09-05 12:14:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:24,160 INFO L225 Difference]: With dead ends: 84 [2019-09-05 12:14:24,160 INFO L226 Difference]: Without dead ends: 81 [2019-09-05 12:14:24,161 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=145, Invalid=5111, Unknown=0, NotChecked=0, Total=5256 [2019-09-05 12:14:24,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-05 12:14:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-09-05 12:14:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-05 12:14:24,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2019-09-05 12:14:24,169 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2019-09-05 12:14:24,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:24,169 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2019-09-05 12:14:24,169 INFO L476 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-09-05 12:14:24,169 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2019-09-05 12:14:24,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-05 12:14:24,170 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:24,170 INFO L399 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:24,170 INFO L418 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:24,170 INFO L82 PathProgramCache]: Analyzing trace with hash 196827024, now seen corresponding path program 69 times [2019-09-05 12:14:24,170 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:24,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:24,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:24,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:24,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:24,178 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:14:24,178 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:14:24,178 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:14:24,196 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:14:42,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2019-09-05 12:14:42,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:42,554 WARN L254 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 287 conjunts are in the unsatisfiable core [2019-09-05 12:14:42,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:45,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:14:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:45,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:14:45,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2019-09-05 12:14:45,173 INFO L454 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-09-05 12:14:45,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-09-05 12:14:45,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=5113, Unknown=0, NotChecked=0, Total=5256 [2019-09-05 12:14:45,173 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 73 states. [2019-09-05 12:14:48,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:48,997 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2019-09-05 12:14:48,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-09-05 12:14:48,997 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 80 [2019-09-05 12:14:48,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:48,998 INFO L225 Difference]: With dead ends: 85 [2019-09-05 12:14:48,998 INFO L226 Difference]: Without dead ends: 82 [2019-09-05 12:14:48,998 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=147, Invalid=5255, Unknown=0, NotChecked=0, Total=5402 [2019-09-05 12:14:48,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-09-05 12:14:49,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-09-05 12:14:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-05 12:14:49,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2019-09-05 12:14:49,005 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2019-09-05 12:14:49,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:49,006 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2019-09-05 12:14:49,006 INFO L476 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-09-05 12:14:49,006 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2019-09-05 12:14:49,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-09-05 12:14:49,006 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:49,006 INFO L399 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:49,007 INFO L418 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:49,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:49,007 INFO L82 PathProgramCache]: Analyzing trace with hash 1806607975, now seen corresponding path program 70 times [2019-09-05 12:14:49,007 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:49,007 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:49,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:49,008 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:49,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:49,015 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:14:49,015 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:14:49,015 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:14:49,031 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:14:49,908 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:14:49,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:49,913 WARN L254 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 291 conjunts are in the unsatisfiable core [2019-09-05 12:14:49,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:52,430 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:14:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:52,513 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:14:52,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2019-09-05 12:14:52,514 INFO L454 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-09-05 12:14:52,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-09-05 12:14:52,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2019-09-05 12:14:52,514 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 74 states. [2019-09-05 12:14:56,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:14:56,321 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2019-09-05 12:14:56,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-09-05 12:14:56,321 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 81 [2019-09-05 12:14:56,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:14:56,322 INFO L225 Difference]: With dead ends: 86 [2019-09-05 12:14:56,322 INFO L226 Difference]: Without dead ends: 83 [2019-09-05 12:14:56,322 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=149, Invalid=5401, Unknown=0, NotChecked=0, Total=5550 [2019-09-05 12:14:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-05 12:14:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-09-05 12:14:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-05 12:14:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2019-09-05 12:14:56,329 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2019-09-05 12:14:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:14:56,329 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2019-09-05 12:14:56,329 INFO L476 AbstractCegarLoop]: Interpolant automaton has 74 states. [2019-09-05 12:14:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2019-09-05 12:14:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-05 12:14:56,330 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:14:56,330 INFO L399 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:14:56,330 INFO L418 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:14:56,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:14:56,330 INFO L82 PathProgramCache]: Analyzing trace with hash 170209904, now seen corresponding path program 71 times [2019-09-05 12:14:56,331 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:14:56,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:14:56,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:56,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:14:56,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:14:56,338 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:14:56,339 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:14:56,339 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:14:56,352 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:14:56,658 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2019-09-05 12:14:56,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:14:56,663 WARN L254 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 295 conjunts are in the unsatisfiable core [2019-09-05 12:14:56,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:14:59,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:14:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:14:59,366 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:14:59,366 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2019-09-05 12:14:59,366 INFO L454 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-09-05 12:14:59,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-09-05 12:14:59,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=5403, Unknown=0, NotChecked=0, Total=5550 [2019-09-05 12:14:59,367 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 75 states. [2019-09-05 12:15:03,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:15:03,307 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2019-09-05 12:15:03,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-09-05 12:15:03,307 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 82 [2019-09-05 12:15:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:15:03,308 INFO L225 Difference]: With dead ends: 87 [2019-09-05 12:15:03,308 INFO L226 Difference]: Without dead ends: 84 [2019-09-05 12:15:03,309 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=151, Invalid=5549, Unknown=0, NotChecked=0, Total=5700 [2019-09-05 12:15:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-09-05 12:15:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2019-09-05 12:15:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-05 12:15:03,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2019-09-05 12:15:03,316 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2019-09-05 12:15:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:15:03,316 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2019-09-05 12:15:03,316 INFO L476 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-09-05 12:15:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2019-09-05 12:15:03,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-05 12:15:03,316 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:15:03,316 INFO L399 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:15:03,317 INFO L418 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:15:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:15:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash 981477255, now seen corresponding path program 72 times [2019-09-05 12:15:03,317 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:15:03,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:15:03,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:03,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:15:03,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:03,324 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:15:03,325 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:15:03,325 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:15:03,346 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:15:07,169 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-09-05 12:15:07,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:15:07,173 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 299 conjunts are in the unsatisfiable core [2019-09-05 12:15:07,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:15:10,080 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:15:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:15:10,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:15:10,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2019-09-05 12:15:10,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 76 states [2019-09-05 12:15:10,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2019-09-05 12:15:10,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2019-09-05 12:15:10,161 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 76 states. [2019-09-05 12:15:14,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:15:14,240 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2019-09-05 12:15:14,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-09-05 12:15:14,240 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 83 [2019-09-05 12:15:14,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:15:14,241 INFO L225 Difference]: With dead ends: 88 [2019-09-05 12:15:14,241 INFO L226 Difference]: Without dead ends: 85 [2019-09-05 12:15:14,241 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=153, Invalid=5699, Unknown=0, NotChecked=0, Total=5852 [2019-09-05 12:15:14,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-05 12:15:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-09-05 12:15:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-05 12:15:14,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2019-09-05 12:15:14,248 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2019-09-05 12:15:14,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:15:14,248 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2019-09-05 12:15:14,248 INFO L476 AbstractCegarLoop]: Interpolant automaton has 76 states. [2019-09-05 12:15:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2019-09-05 12:15:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-09-05 12:15:14,248 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:15:14,249 INFO L399 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:15:14,249 INFO L418 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:15:14,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:15:14,249 INFO L82 PathProgramCache]: Analyzing trace with hash 360961360, now seen corresponding path program 73 times [2019-09-05 12:15:14,249 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:15:14,249 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:15:14,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:14,250 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:15:14,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:14,255 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:15:14,256 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:15:14,256 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:15:14,266 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:15:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:15:14,515 WARN L254 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 303 conjunts are in the unsatisfiable core [2019-09-05 12:15:14,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:15:17,354 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:15:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:15:17,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:15:17,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2019-09-05 12:15:17,437 INFO L454 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-09-05 12:15:17,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-09-05 12:15:17,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=5701, Unknown=0, NotChecked=0, Total=5852 [2019-09-05 12:15:17,438 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 77 states. [2019-09-05 12:15:21,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:15:21,673 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2019-09-05 12:15:21,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-09-05 12:15:21,674 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 84 [2019-09-05 12:15:21,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:15:21,674 INFO L225 Difference]: With dead ends: 89 [2019-09-05 12:15:21,675 INFO L226 Difference]: Without dead ends: 86 [2019-09-05 12:15:21,675 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=155, Invalid=5851, Unknown=0, NotChecked=0, Total=6006 [2019-09-05 12:15:21,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-05 12:15:21,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-09-05 12:15:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-05 12:15:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2019-09-05 12:15:21,682 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2019-09-05 12:15:21,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:15:21,682 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2019-09-05 12:15:21,682 INFO L476 AbstractCegarLoop]: Interpolant automaton has 77 states. [2019-09-05 12:15:21,682 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2019-09-05 12:15:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-05 12:15:21,682 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:15:21,683 INFO L399 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:15:21,683 INFO L418 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:15:21,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:15:21,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1695162201, now seen corresponding path program 74 times [2019-09-05 12:15:21,683 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:15:21,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:15:21,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:21,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:15:21,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:21,691 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:15:21,691 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:15:21,691 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:15:21,718 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:15:21,950 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:15:21,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:15:21,955 WARN L254 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 307 conjunts are in the unsatisfiable core [2019-09-05 12:15:21,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:15:24,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:15:24,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:15:24,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:15:24,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2019-09-05 12:15:24,873 INFO L454 AbstractCegarLoop]: Interpolant automaton has 78 states [2019-09-05 12:15:24,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2019-09-05 12:15:24,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2019-09-05 12:15:24,873 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand 78 states. [2019-09-05 12:15:29,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:15:29,147 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2019-09-05 12:15:29,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2019-09-05 12:15:29,148 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 85 [2019-09-05 12:15:29,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:15:29,148 INFO L225 Difference]: With dead ends: 90 [2019-09-05 12:15:29,148 INFO L226 Difference]: Without dead ends: 87 [2019-09-05 12:15:29,149 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=157, Invalid=6005, Unknown=0, NotChecked=0, Total=6162 [2019-09-05 12:15:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-05 12:15:29,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2019-09-05 12:15:29,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-09-05 12:15:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2019-09-05 12:15:29,155 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2019-09-05 12:15:29,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:15:29,156 INFO L475 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2019-09-05 12:15:29,156 INFO L476 AbstractCegarLoop]: Interpolant automaton has 78 states. [2019-09-05 12:15:29,156 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2019-09-05 12:15:29,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-09-05 12:15:29,156 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:15:29,156 INFO L399 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:15:29,156 INFO L418 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:15:29,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:15:29,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1010483152, now seen corresponding path program 75 times [2019-09-05 12:15:29,157 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:15:29,157 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:15:29,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:29,157 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:15:29,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:15:29,164 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:15:29,164 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:15:29,164 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:15:29,196 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:15:54,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2019-09-05 12:15:54,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:15:55,002 WARN L254 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 311 conjunts are in the unsatisfiable core [2019-09-05 12:15:55,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:15:57,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:15:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:15:57,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:15:57,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2019-09-05 12:15:57,950 INFO L454 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-09-05 12:15:57,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-09-05 12:15:57,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=6007, Unknown=0, NotChecked=0, Total=6162 [2019-09-05 12:15:57,950 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 79 states. [2019-09-05 12:16:02,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:16:02,305 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2019-09-05 12:16:02,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-09-05 12:16:02,306 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 86 [2019-09-05 12:16:02,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:16:02,307 INFO L225 Difference]: With dead ends: 91 [2019-09-05 12:16:02,307 INFO L226 Difference]: Without dead ends: 88 [2019-09-05 12:16:02,308 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=159, Invalid=6161, Unknown=0, NotChecked=0, Total=6320 [2019-09-05 12:16:02,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-05 12:16:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-09-05 12:16:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-05 12:16:02,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2019-09-05 12:16:02,316 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2019-09-05 12:16:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:16:02,316 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2019-09-05 12:16:02,317 INFO L476 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-09-05 12:16:02,317 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2019-09-05 12:16:02,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-09-05 12:16:02,317 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:16:02,317 INFO L399 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:16:02,317 INFO L418 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:16:02,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:16:02,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1260269113, now seen corresponding path program 76 times [2019-09-05 12:16:02,318 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:16:02,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:16:02,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:02,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:16:02,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:02,326 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:16:02,326 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:16:02,326 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:16:02,339 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:16:03,353 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:16:03,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:16:03,359 WARN L254 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 315 conjunts are in the unsatisfiable core [2019-09-05 12:16:03,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:16:06,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:16:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:16:06,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:16:06,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2019-09-05 12:16:06,407 INFO L454 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-09-05 12:16:06,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-09-05 12:16:06,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2019-09-05 12:16:06,408 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 80 states. [2019-09-05 12:16:10,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:16:10,906 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2019-09-05 12:16:10,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-09-05 12:16:10,907 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 87 [2019-09-05 12:16:10,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:16:10,908 INFO L225 Difference]: With dead ends: 92 [2019-09-05 12:16:10,908 INFO L226 Difference]: Without dead ends: 89 [2019-09-05 12:16:10,909 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=161, Invalid=6319, Unknown=0, NotChecked=0, Total=6480 [2019-09-05 12:16:10,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-09-05 12:16:10,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2019-09-05 12:16:10,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-05 12:16:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2019-09-05 12:16:10,916 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2019-09-05 12:16:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:16:10,916 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2019-09-05 12:16:10,916 INFO L476 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-09-05 12:16:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2019-09-05 12:16:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-05 12:16:10,917 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:16:10,917 INFO L399 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:16:10,917 INFO L418 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:16:10,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:16:10,918 INFO L82 PathProgramCache]: Analyzing trace with hash -413699312, now seen corresponding path program 77 times [2019-09-05 12:16:10,918 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:16:10,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:16:10,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:10,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:16:10,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:10,926 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:16:10,926 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:16:10,926 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:16:10,951 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:16:11,309 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-09-05 12:16:11,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:16:11,314 WARN L254 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 319 conjunts are in the unsatisfiable core [2019-09-05 12:16:11,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:16:14,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:16:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:16:14,450 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:16:14,450 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2019-09-05 12:16:14,452 INFO L454 AbstractCegarLoop]: Interpolant automaton has 81 states [2019-09-05 12:16:14,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2019-09-05 12:16:14,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=6321, Unknown=0, NotChecked=0, Total=6480 [2019-09-05 12:16:14,452 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 81 states. [2019-09-05 12:16:19,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:16:19,067 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2019-09-05 12:16:19,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2019-09-05 12:16:19,067 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 88 [2019-09-05 12:16:19,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:16:19,068 INFO L225 Difference]: With dead ends: 93 [2019-09-05 12:16:19,068 INFO L226 Difference]: Without dead ends: 90 [2019-09-05 12:16:19,068 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=163, Invalid=6479, Unknown=0, NotChecked=0, Total=6642 [2019-09-05 12:16:19,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-05 12:16:19,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-09-05 12:16:19,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-05 12:16:19,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2019-09-05 12:16:19,074 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2019-09-05 12:16:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:16:19,075 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2019-09-05 12:16:19,075 INFO L476 AbstractCegarLoop]: Interpolant automaton has 81 states. [2019-09-05 12:16:19,075 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2019-09-05 12:16:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-05 12:16:19,075 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:16:19,075 INFO L399 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:16:19,075 INFO L418 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:16:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:16:19,076 INFO L82 PathProgramCache]: Analyzing trace with hash 60160743, now seen corresponding path program 78 times [2019-09-05 12:16:19,076 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:16:19,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:16:19,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:19,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:16:19,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:19,093 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:16:19,093 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:16:19,093 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:16:19,103 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:16:25,116 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2019-09-05 12:16:25,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:16:25,126 WARN L254 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 323 conjunts are in the unsatisfiable core [2019-09-05 12:16:25,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:16:28,361 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:16:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:16:28,449 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:16:28,449 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2019-09-05 12:16:28,450 INFO L454 AbstractCegarLoop]: Interpolant automaton has 82 states [2019-09-05 12:16:28,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2019-09-05 12:16:28,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2019-09-05 12:16:28,450 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand 82 states. [2019-09-05 12:16:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:16:33,190 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2019-09-05 12:16:33,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2019-09-05 12:16:33,191 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 89 [2019-09-05 12:16:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:16:33,191 INFO L225 Difference]: With dead ends: 94 [2019-09-05 12:16:33,191 INFO L226 Difference]: Without dead ends: 91 [2019-09-05 12:16:33,192 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=165, Invalid=6641, Unknown=0, NotChecked=0, Total=6806 [2019-09-05 12:16:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-05 12:16:33,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2019-09-05 12:16:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-09-05 12:16:33,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2019-09-05 12:16:33,200 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2019-09-05 12:16:33,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:16:33,200 INFO L475 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2019-09-05 12:16:33,200 INFO L476 AbstractCegarLoop]: Interpolant automaton has 82 states. [2019-09-05 12:16:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2019-09-05 12:16:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-09-05 12:16:33,200 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:16:33,201 INFO L399 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:16:33,201 INFO L418 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:16:33,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:16:33,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1864920560, now seen corresponding path program 79 times [2019-09-05 12:16:33,201 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:16:33,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:16:33,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:33,202 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:16:33,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:33,208 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:16:33,208 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:16:33,208 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:16:33,235 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:16:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:16:33,515 WARN L254 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 327 conjunts are in the unsatisfiable core [2019-09-05 12:16:33,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:16:36,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:16:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:16:36,695 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:16:36,695 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2019-09-05 12:16:36,696 INFO L454 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-09-05 12:16:36,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-09-05 12:16:36,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=6643, Unknown=0, NotChecked=0, Total=6806 [2019-09-05 12:16:36,696 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 83 states. [2019-09-05 12:16:41,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:16:41,472 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2019-09-05 12:16:41,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-09-05 12:16:41,473 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 90 [2019-09-05 12:16:41,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:16:41,474 INFO L225 Difference]: With dead ends: 95 [2019-09-05 12:16:41,474 INFO L226 Difference]: Without dead ends: 92 [2019-09-05 12:16:41,474 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=167, Invalid=6805, Unknown=0, NotChecked=0, Total=6972 [2019-09-05 12:16:41,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-09-05 12:16:41,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-09-05 12:16:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-05 12:16:41,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2019-09-05 12:16:41,481 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2019-09-05 12:16:41,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:16:41,482 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2019-09-05 12:16:41,482 INFO L476 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-09-05 12:16:41,482 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2019-09-05 12:16:41,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-05 12:16:41,482 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:16:41,482 INFO L399 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:16:41,482 INFO L418 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:16:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:16:41,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1977900039, now seen corresponding path program 80 times [2019-09-05 12:16:41,483 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:16:41,483 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:16:41,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:41,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:16:41,484 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:41,490 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:16:41,490 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:16:41,490 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:16:41,508 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:16:41,783 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:16:41,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:16:41,788 WARN L254 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 331 conjunts are in the unsatisfiable core [2019-09-05 12:16:41,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:16:44,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:16:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:16:45,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:16:45,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2019-09-05 12:16:45,063 INFO L454 AbstractCegarLoop]: Interpolant automaton has 84 states [2019-09-05 12:16:45,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2019-09-05 12:16:45,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2019-09-05 12:16:45,063 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 84 states. [2019-09-05 12:16:49,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:16:49,985 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2019-09-05 12:16:49,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-09-05 12:16:49,985 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 91 [2019-09-05 12:16:49,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:16:49,986 INFO L225 Difference]: With dead ends: 96 [2019-09-05 12:16:49,986 INFO L226 Difference]: Without dead ends: 93 [2019-09-05 12:16:49,987 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=169, Invalid=6971, Unknown=0, NotChecked=0, Total=7140 [2019-09-05 12:16:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-05 12:16:49,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-05 12:16:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-05 12:16:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2019-09-05 12:16:49,996 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2019-09-05 12:16:49,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:16:49,997 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2019-09-05 12:16:49,997 INFO L476 AbstractCegarLoop]: Interpolant automaton has 84 states. [2019-09-05 12:16:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2019-09-05 12:16:49,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-05 12:16:49,998 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:16:49,998 INFO L399 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:16:49,998 INFO L418 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:16:49,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:16:49,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1185296592, now seen corresponding path program 81 times [2019-09-05 12:16:49,998 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:16:49,998 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:16:49,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:49,999 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:16:49,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:16:50,006 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:16:50,007 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:16:50,007 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:16:50,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:17:26,595 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2019-09-05 12:17:26,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:17:26,602 WARN L254 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 335 conjunts are in the unsatisfiable core [2019-09-05 12:17:26,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:17:29,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:17:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:17:29,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:17:29,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2019-09-05 12:17:29,946 INFO L454 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-09-05 12:17:29,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-09-05 12:17:29,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=6973, Unknown=0, NotChecked=0, Total=7140 [2019-09-05 12:17:29,946 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 85 states. [2019-09-05 12:17:35,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:17:35,058 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2019-09-05 12:17:35,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-09-05 12:17:35,058 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 92 [2019-09-05 12:17:35,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:17:35,059 INFO L225 Difference]: With dead ends: 97 [2019-09-05 12:17:35,059 INFO L226 Difference]: Without dead ends: 94 [2019-09-05 12:17:35,060 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=171, Invalid=7139, Unknown=0, NotChecked=0, Total=7310 [2019-09-05 12:17:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-05 12:17:35,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-09-05 12:17:35,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-05 12:17:35,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2019-09-05 12:17:35,066 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2019-09-05 12:17:35,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:17:35,067 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2019-09-05 12:17:35,067 INFO L476 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-09-05 12:17:35,067 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2019-09-05 12:17:35,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-09-05 12:17:35,067 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:17:35,067 INFO L399 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:17:35,067 INFO L418 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:17:35,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:17:35,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1910573785, now seen corresponding path program 82 times [2019-09-05 12:17:35,068 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:17:35,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:17:35,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:35,068 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:17:35,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:35,076 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:17:35,076 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:17:35,076 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:17:35,111 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:17:36,458 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:17:36,459 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:17:36,463 WARN L254 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 339 conjunts are in the unsatisfiable core [2019-09-05 12:17:36,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:17:39,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:17:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:17:39,852 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:17:39,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2019-09-05 12:17:39,852 INFO L454 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-09-05 12:17:39,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-09-05 12:17:39,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2019-09-05 12:17:39,853 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand 86 states. [2019-09-05 12:17:45,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:17:45,006 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2019-09-05 12:17:45,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-09-05 12:17:45,006 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 93 [2019-09-05 12:17:45,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:17:45,007 INFO L225 Difference]: With dead ends: 98 [2019-09-05 12:17:45,007 INFO L226 Difference]: Without dead ends: 95 [2019-09-05 12:17:45,007 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=173, Invalid=7309, Unknown=0, NotChecked=0, Total=7482 [2019-09-05 12:17:45,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-05 12:17:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-09-05 12:17:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-05 12:17:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2019-09-05 12:17:45,014 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2019-09-05 12:17:45,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:17:45,014 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2019-09-05 12:17:45,014 INFO L476 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-09-05 12:17:45,015 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2019-09-05 12:17:45,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-05 12:17:45,015 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:17:45,015 INFO L399 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:17:45,015 INFO L418 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:17:45,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:17:45,015 INFO L82 PathProgramCache]: Analyzing trace with hash 901692336, now seen corresponding path program 83 times [2019-09-05 12:17:45,016 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:17:45,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:17:45,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:45,016 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:17:45,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:45,024 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:17:45,024 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:17:45,024 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:17:45,041 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:17:45,580 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2019-09-05 12:17:45,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:17:45,586 WARN L254 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 343 conjunts are in the unsatisfiable core [2019-09-05 12:17:45,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:17:49,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:17:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:17:49,169 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:17:49,169 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2019-09-05 12:17:49,170 INFO L454 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-09-05 12:17:49,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-09-05 12:17:49,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=7311, Unknown=0, NotChecked=0, Total=7482 [2019-09-05 12:17:49,170 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 87 states. [2019-09-05 12:17:54,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:17:54,562 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2019-09-05 12:17:54,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-09-05 12:17:54,563 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 94 [2019-09-05 12:17:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:17:54,563 INFO L225 Difference]: With dead ends: 99 [2019-09-05 12:17:54,564 INFO L226 Difference]: Without dead ends: 96 [2019-09-05 12:17:54,564 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=175, Invalid=7481, Unknown=0, NotChecked=0, Total=7656 [2019-09-05 12:17:54,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-05 12:17:54,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-09-05 12:17:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-05 12:17:54,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2019-09-05 12:17:54,572 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2019-09-05 12:17:54,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:17:54,572 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2019-09-05 12:17:54,572 INFO L476 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-09-05 12:17:54,572 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2019-09-05 12:17:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-05 12:17:54,573 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:17:54,573 INFO L399 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:17:54,573 INFO L418 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:17:54,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:17:54,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2112371129, now seen corresponding path program 84 times [2019-09-05 12:17:54,573 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:17:54,573 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:17:54,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:54,574 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:17:54,574 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:17:54,579 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:17:54,579 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:17:54,579 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:17:54,590 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:18:01,977 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-09-05 12:18:01,977 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:01,987 WARN L254 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 347 conjunts are in the unsatisfiable core [2019-09-05 12:18:01,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:05,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:18:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:05,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:18:05,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2019-09-05 12:18:05,626 INFO L454 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-09-05 12:18:05,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-09-05 12:18:05,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2019-09-05 12:18:05,627 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 88 states. [2019-09-05 12:18:11,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:11,078 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2019-09-05 12:18:11,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-09-05 12:18:11,079 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 95 [2019-09-05 12:18:11,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:11,080 INFO L225 Difference]: With dead ends: 100 [2019-09-05 12:18:11,080 INFO L226 Difference]: Without dead ends: 97 [2019-09-05 12:18:11,081 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=177, Invalid=7655, Unknown=0, NotChecked=0, Total=7832 [2019-09-05 12:18:11,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-05 12:18:11,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-09-05 12:18:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-05 12:18:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2019-09-05 12:18:11,090 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2019-09-05 12:18:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:11,090 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2019-09-05 12:18:11,090 INFO L476 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-09-05 12:18:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2019-09-05 12:18:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-05 12:18:11,091 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:11,091 INFO L399 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:11,091 INFO L418 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:11,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:11,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1059058032, now seen corresponding path program 85 times [2019-09-05 12:18:11,092 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:11,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:11,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:11,092 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:11,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:11,101 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:18:11,101 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:18:11,101 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:18:11,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:18:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:18:11,471 WARN L254 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 351 conjunts are in the unsatisfiable core [2019-09-05 12:18:11,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:15,132 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:18:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 12:18:15,225 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:18:15,225 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2019-09-05 12:18:15,225 INFO L454 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-09-05 12:18:15,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-09-05 12:18:15,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=7657, Unknown=0, NotChecked=0, Total=7832 [2019-09-05 12:18:15,226 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 89 states. [2019-09-05 12:18:20,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:20,798 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2019-09-05 12:18:20,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-09-05 12:18:20,798 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 96 [2019-09-05 12:18:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:20,800 INFO L225 Difference]: With dead ends: 101 [2019-09-05 12:18:20,800 INFO L226 Difference]: Without dead ends: 98 [2019-09-05 12:18:20,801 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=179, Invalid=7831, Unknown=0, NotChecked=0, Total=8010 [2019-09-05 12:18:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-05 12:18:20,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-09-05 12:18:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-05 12:18:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2019-09-05 12:18:20,809 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2019-09-05 12:18:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:20,809 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2019-09-05 12:18:20,809 INFO L476 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-09-05 12:18:20,809 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2019-09-05 12:18:20,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-05 12:18:20,810 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:20,810 INFO L399 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:20,810 INFO L418 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:20,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:20,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1528876903, now seen corresponding path program 86 times [2019-09-05 12:18:20,810 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:20,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:20,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:20,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:18:20,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:20,818 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:18:20,818 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:18:20,818 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:18:20,840 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:18:21,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:18:21,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:18:21,190 WARN L254 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 355 conjunts are in the unsatisfiable core [2019-09-05 12:18:21,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:18:24,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:18:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:18:24,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:18:24,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2019-09-05 12:18:24,924 INFO L454 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-09-05 12:18:24,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-09-05 12:18:24,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2019-09-05 12:18:24,925 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 90 states. [2019-09-05 12:18:30,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:18:30,646 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2019-09-05 12:18:30,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-09-05 12:18:30,646 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 97 [2019-09-05 12:18:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:18:30,647 INFO L225 Difference]: With dead ends: 102 [2019-09-05 12:18:30,647 INFO L226 Difference]: Without dead ends: 99 [2019-09-05 12:18:30,647 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=181, Invalid=8009, Unknown=0, NotChecked=0, Total=8190 [2019-09-05 12:18:30,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-05 12:18:30,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-09-05 12:18:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-05 12:18:30,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2019-09-05 12:18:30,654 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2019-09-05 12:18:30,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:18:30,654 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2019-09-05 12:18:30,654 INFO L476 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-09-05 12:18:30,655 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2019-09-05 12:18:30,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-09-05 12:18:30,655 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:18:30,655 INFO L399 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:18:30,655 INFO L418 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:18:30,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:18:30,655 INFO L82 PathProgramCache]: Analyzing trace with hash 150481264, now seen corresponding path program 87 times [2019-09-05 12:18:30,656 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:18:30,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:18:30,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:30,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:18:30,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:18:30,663 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:18:30,664 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:18:30,664 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:18:30,679 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:19:22,245 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2019-09-05 12:19:22,245 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:19:22,254 WARN L254 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 359 conjunts are in the unsatisfiable core [2019-09-05 12:19:22,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:19:25,986 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:19:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:19:26,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:19:26,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2019-09-05 12:19:26,087 INFO L454 AbstractCegarLoop]: Interpolant automaton has 91 states [2019-09-05 12:19:26,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2019-09-05 12:19:26,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=8011, Unknown=0, NotChecked=0, Total=8190 [2019-09-05 12:19:26,088 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 91 states. [2019-09-05 12:19:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:19:31,911 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2019-09-05 12:19:31,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2019-09-05 12:19:31,911 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 98 [2019-09-05 12:19:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:19:31,912 INFO L225 Difference]: With dead ends: 103 [2019-09-05 12:19:31,912 INFO L226 Difference]: Without dead ends: 100 [2019-09-05 12:19:31,913 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=183, Invalid=8189, Unknown=0, NotChecked=0, Total=8372 [2019-09-05 12:19:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-09-05 12:19:31,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-09-05 12:19:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-05 12:19:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2019-09-05 12:19:31,922 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2019-09-05 12:19:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:19:31,922 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2019-09-05 12:19:31,922 INFO L476 AbstractCegarLoop]: Interpolant automaton has 91 states. [2019-09-05 12:19:31,922 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2019-09-05 12:19:31,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-05 12:19:31,922 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:19:31,922 INFO L399 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:19:31,923 INFO L418 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:19:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:19:31,923 INFO L82 PathProgramCache]: Analyzing trace with hash 369889415, now seen corresponding path program 88 times [2019-09-05 12:19:31,923 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:19:31,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:19:31,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:31,923 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:19:31,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:31,931 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:19:31,931 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:19:31,931 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:19:31,943 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:19:33,279 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:19:33,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:19:33,284 WARN L254 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 363 conjunts are in the unsatisfiable core [2019-09-05 12:19:33,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:19:37,131 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:19:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:19:37,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:19:37,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2019-09-05 12:19:37,231 INFO L454 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-09-05 12:19:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-09-05 12:19:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2019-09-05 12:19:37,231 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 92 states. [2019-09-05 12:19:43,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:19:43,199 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2019-09-05 12:19:43,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-09-05 12:19:43,199 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 99 [2019-09-05 12:19:43,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:19:43,200 INFO L225 Difference]: With dead ends: 104 [2019-09-05 12:19:43,200 INFO L226 Difference]: Without dead ends: 101 [2019-09-05 12:19:43,201 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=185, Invalid=8371, Unknown=0, NotChecked=0, Total=8556 [2019-09-05 12:19:43,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-05 12:19:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-09-05 12:19:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-05 12:19:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2019-09-05 12:19:43,214 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2019-09-05 12:19:43,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:19:43,215 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2019-09-05 12:19:43,215 INFO L476 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-09-05 12:19:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2019-09-05 12:19:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-05 12:19:43,215 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:19:43,215 INFO L399 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:19:43,215 INFO L418 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:19:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:19:43,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1418392496, now seen corresponding path program 89 times [2019-09-05 12:19:43,216 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:19:43,216 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:19:43,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:43,216 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:19:43,216 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:43,223 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:19:43,223 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:19:43,223 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:19:43,232 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:19:43,760 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2019-09-05 12:19:43,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:19:43,766 WARN L254 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 367 conjunts are in the unsatisfiable core [2019-09-05 12:19:43,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:19:47,914 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:19:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:19:48,018 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:19:48,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2019-09-05 12:19:48,018 INFO L454 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-09-05 12:19:48,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-09-05 12:19:48,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=8373, Unknown=0, NotChecked=0, Total=8556 [2019-09-05 12:19:48,019 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 93 states. [2019-09-05 12:19:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:19:54,286 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2019-09-05 12:19:54,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-09-05 12:19:54,287 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 100 [2019-09-05 12:19:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:19:54,288 INFO L225 Difference]: With dead ends: 105 [2019-09-05 12:19:54,288 INFO L226 Difference]: Without dead ends: 102 [2019-09-05 12:19:54,288 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=187, Invalid=8555, Unknown=0, NotChecked=0, Total=8742 [2019-09-05 12:19:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-05 12:19:54,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-09-05 12:19:54,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-05 12:19:54,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2019-09-05 12:19:54,296 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2019-09-05 12:19:54,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:19:54,296 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2019-09-05 12:19:54,297 INFO L476 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-09-05 12:19:54,297 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2019-09-05 12:19:54,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-05 12:19:54,297 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:19:54,297 INFO L399 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:19:54,297 INFO L418 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:19:54,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:19:54,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1020556889, now seen corresponding path program 90 times [2019-09-05 12:19:54,298 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:19:54,298 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:19:54,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:54,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:19:54,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:19:54,306 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:19:54,306 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:19:54,306 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 12:19:54,337 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:20:06,601 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2019-09-05 12:20:06,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:20:06,612 WARN L254 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 371 conjunts are in the unsatisfiable core [2019-09-05 12:20:06,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:20:10,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:20:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:20:10,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:20:10,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2019-09-05 12:20:10,739 INFO L454 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-09-05 12:20:10,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-09-05 12:20:10,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=8557, Unknown=0, NotChecked=0, Total=8742 [2019-09-05 12:20:10,740 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 94 states. [2019-09-05 12:20:16,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:20:16,962 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2019-09-05 12:20:16,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-09-05 12:20:16,962 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 101 [2019-09-05 12:20:16,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:20:16,963 INFO L225 Difference]: With dead ends: 106 [2019-09-05 12:20:16,963 INFO L226 Difference]: Without dead ends: 103 [2019-09-05 12:20:16,964 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=189, Invalid=8741, Unknown=0, NotChecked=0, Total=8930 [2019-09-05 12:20:16,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-05 12:20:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-09-05 12:20:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-05 12:20:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2019-09-05 12:20:16,972 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2019-09-05 12:20:16,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:20:16,972 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2019-09-05 12:20:16,972 INFO L476 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-09-05 12:20:16,972 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2019-09-05 12:20:16,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-05 12:20:16,973 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:20:16,973 INFO L399 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:20:16,973 INFO L418 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:20:16,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:20:16,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1572554960, now seen corresponding path program 91 times [2019-09-05 12:20:16,973 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:20:16,974 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:20:16,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:20:16,974 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:20:16,974 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:20:16,981 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:20:16,981 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:20:16,981 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:20:16,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:20:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:20:17,406 WARN L254 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 375 conjunts are in the unsatisfiable core [2019-09-05 12:20:17,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:20:21,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:20:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:20:21,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:20:21,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2019-09-05 12:20:21,641 INFO L454 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-09-05 12:20:21,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-09-05 12:20:21,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=8743, Unknown=0, NotChecked=0, Total=8930 [2019-09-05 12:20:21,641 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 95 states. [2019-09-05 12:20:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:20:27,978 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2019-09-05 12:20:27,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-09-05 12:20:27,979 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 102 [2019-09-05 12:20:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:20:27,980 INFO L225 Difference]: With dead ends: 107 [2019-09-05 12:20:27,980 INFO L226 Difference]: Without dead ends: 104 [2019-09-05 12:20:27,980 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=191, Invalid=8929, Unknown=0, NotChecked=0, Total=9120 [2019-09-05 12:20:27,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-05 12:20:27,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-09-05 12:20:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-09-05 12:20:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-09-05 12:20:27,992 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2019-09-05 12:20:27,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:20:27,993 INFO L475 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-09-05 12:20:27,993 INFO L476 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-09-05 12:20:27,993 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-09-05 12:20:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-05 12:20:27,993 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:20:27,994 INFO L399 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:20:27,994 INFO L418 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:20:27,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:20:27,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1504625977, now seen corresponding path program 92 times [2019-09-05 12:20:27,994 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:20:27,994 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:20:27,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:20:27,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:20:27,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:20:28,002 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:20:28,003 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:20:28,003 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:20:28,033 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:20:28,430 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:20:28,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:20:28,436 WARN L254 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 379 conjunts are in the unsatisfiable core [2019-09-05 12:20:28,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:20:32,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:20:32,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:20:32,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:20:32,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2019-09-05 12:20:32,800 INFO L454 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-09-05 12:20:32,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-09-05 12:20:32,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=8931, Unknown=0, NotChecked=0, Total=9120 [2019-09-05 12:20:32,801 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 96 states. [2019-09-05 12:20:39,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:20:39,309 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2019-09-05 12:20:39,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-09-05 12:20:39,309 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 103 [2019-09-05 12:20:39,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:20:39,310 INFO L225 Difference]: With dead ends: 108 [2019-09-05 12:20:39,310 INFO L226 Difference]: Without dead ends: 105 [2019-09-05 12:20:39,311 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=193, Invalid=9119, Unknown=0, NotChecked=0, Total=9312 [2019-09-05 12:20:39,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-09-05 12:20:39,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-09-05 12:20:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-05 12:20:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2019-09-05 12:20:39,323 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2019-09-05 12:20:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:20:39,323 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2019-09-05 12:20:39,323 INFO L476 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-09-05 12:20:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2019-09-05 12:20:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-05 12:20:39,324 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:20:39,324 INFO L399 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:20:39,324 INFO L418 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:20:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:20:39,324 INFO L82 PathProgramCache]: Analyzing trace with hash 601172496, now seen corresponding path program 93 times [2019-09-05 12:20:39,325 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:20:39,325 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:20:39,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:20:39,325 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:20:39,325 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:20:39,333 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:20:39,333 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:20:39,333 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:20:39,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 12:21:49,833 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2019-09-05 12:21:49,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:21:49,843 WARN L254 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 383 conjunts are in the unsatisfiable core [2019-09-05 12:21:49,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:21:54,232 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:21:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:21:54,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:21:54,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2019-09-05 12:21:54,339 INFO L454 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-09-05 12:21:54,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-09-05 12:21:54,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=9121, Unknown=0, NotChecked=0, Total=9312 [2019-09-05 12:21:54,340 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 97 states. [2019-09-05 12:22:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:22:01,082 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2019-09-05 12:22:01,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-09-05 12:22:01,083 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 104 [2019-09-05 12:22:01,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:22:01,084 INFO L225 Difference]: With dead ends: 109 [2019-09-05 12:22:01,084 INFO L226 Difference]: Without dead ends: 106 [2019-09-05 12:22:01,085 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=195, Invalid=9311, Unknown=0, NotChecked=0, Total=9506 [2019-09-05 12:22:01,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-05 12:22:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-09-05 12:22:01,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-05 12:22:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2019-09-05 12:22:01,095 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2019-09-05 12:22:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:22:01,096 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2019-09-05 12:22:01,096 INFO L476 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-09-05 12:22:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2019-09-05 12:22:01,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-09-05 12:22:01,096 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:22:01,097 INFO L399 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:22:01,097 INFO L418 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:22:01,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:22:01,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1456415719, now seen corresponding path program 94 times [2019-09-05 12:22:01,097 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:22:01,097 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:22:01,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:22:01,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:22:01,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:22:01,106 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:22:01,106 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:22:01,106 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:22:01,124 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-05 12:22:02,627 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-05 12:22:02,627 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:22:02,633 WARN L254 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 387 conjunts are in the unsatisfiable core [2019-09-05 12:22:02,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:22:07,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:22:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:22:07,128 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:22:07,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [98] total 98 [2019-09-05 12:22:07,128 INFO L454 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-09-05 12:22:07,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-09-05 12:22:07,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=9313, Unknown=0, NotChecked=0, Total=9506 [2019-09-05 12:22:07,129 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand 98 states. [2019-09-05 12:22:13,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:22:13,931 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2019-09-05 12:22:13,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-09-05 12:22:13,931 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 105 [2019-09-05 12:22:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:22:13,932 INFO L225 Difference]: With dead ends: 110 [2019-09-05 12:22:13,932 INFO L226 Difference]: Without dead ends: 107 [2019-09-05 12:22:13,932 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=197, Invalid=9505, Unknown=0, NotChecked=0, Total=9702 [2019-09-05 12:22:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-05 12:22:13,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2019-09-05 12:22:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-05 12:22:13,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2019-09-05 12:22:13,944 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2019-09-05 12:22:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:22:13,944 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2019-09-05 12:22:13,944 INFO L476 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-09-05 12:22:13,944 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2019-09-05 12:22:13,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-05 12:22:13,945 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:22:13,945 INFO L399 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:22:13,945 INFO L418 AbstractCegarLoop]: === Iteration 96 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:22:13,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:22:13,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2095815440, now seen corresponding path program 95 times [2019-09-05 12:22:13,946 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:22:13,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:22:13,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:22:13,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:22:13,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:22:13,954 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:22:13,954 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:22:13,954 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:22:13,977 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-05 12:22:14,569 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2019-09-05 12:22:14,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:22:14,576 WARN L254 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 391 conjunts are in the unsatisfiable core [2019-09-05 12:22:14,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:22:19,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:22:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:22:19,291 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:22:19,291 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2019-09-05 12:22:19,292 INFO L454 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-09-05 12:22:19,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-09-05 12:22:19,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=9507, Unknown=0, NotChecked=0, Total=9702 [2019-09-05 12:22:19,292 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 99 states. [2019-09-05 12:22:26,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:22:26,106 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2019-09-05 12:22:26,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-09-05 12:22:26,106 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 106 [2019-09-05 12:22:26,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:22:26,108 INFO L225 Difference]: With dead ends: 111 [2019-09-05 12:22:26,108 INFO L226 Difference]: Without dead ends: 108 [2019-09-05 12:22:26,108 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=199, Invalid=9701, Unknown=0, NotChecked=0, Total=9900 [2019-09-05 12:22:26,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-09-05 12:22:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-09-05 12:22:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-05 12:22:26,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2019-09-05 12:22:26,119 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2019-09-05 12:22:26,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:22:26,120 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2019-09-05 12:22:26,120 INFO L476 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-09-05 12:22:26,120 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2019-09-05 12:22:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-05 12:22:26,121 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:22:26,121 INFO L399 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:22:26,121 INFO L418 AbstractCegarLoop]: === Iteration 97 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:22:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:22:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash -545831673, now seen corresponding path program 96 times [2019-09-05 12:22:26,121 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:22:26,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:22:26,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:22:26,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:22:26,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:22:26,130 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:22:26,130 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:22:26,130 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:22:26,149 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-05 12:22:40,576 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-05 12:22:40,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:22:40,588 WARN L254 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 395 conjunts are in the unsatisfiable core [2019-09-05 12:22:40,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:22:45,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:22:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:22:45,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:22:45,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2019-09-05 12:22:45,153 INFO L454 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-09-05 12:22:45,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-09-05 12:22:45,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=9703, Unknown=0, NotChecked=0, Total=9900 [2019-09-05 12:22:45,154 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 100 states. [2019-09-05 12:22:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:22:52,157 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2019-09-05 12:22:52,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-09-05 12:22:52,158 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 107 [2019-09-05 12:22:52,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:22:52,159 INFO L225 Difference]: With dead ends: 112 [2019-09-05 12:22:52,159 INFO L226 Difference]: Without dead ends: 109 [2019-09-05 12:22:52,159 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=201, Invalid=9899, Unknown=0, NotChecked=0, Total=10100 [2019-09-05 12:22:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-05 12:22:52,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2019-09-05 12:22:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-05 12:22:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2019-09-05 12:22:52,168 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2019-09-05 12:22:52,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:22:52,169 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2019-09-05 12:22:52,169 INFO L476 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-09-05 12:22:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2019-09-05 12:22:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-09-05 12:22:52,170 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:22:52,170 INFO L399 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:22:52,170 INFO L418 AbstractCegarLoop]: === Iteration 98 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:22:52,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:22:52,170 INFO L82 PathProgramCache]: Analyzing trace with hash 259024848, now seen corresponding path program 97 times [2019-09-05 12:22:52,170 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:22:52,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:22:52,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:22:52,171 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:22:52,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:22:52,176 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:22:52,176 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:22:52,177 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:22:52,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:22:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:22:52,645 WARN L254 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 399 conjunts are in the unsatisfiable core [2019-09-05 12:22:52,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:22:57,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:22:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:22:57,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:22:57,378 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2019-09-05 12:22:57,379 INFO L454 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-09-05 12:22:57,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-09-05 12:22:57,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=9901, Unknown=0, NotChecked=0, Total=10100 [2019-09-05 12:22:57,380 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 101 states. [2019-09-05 12:23:04,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:23:04,557 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2019-09-05 12:23:04,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-09-05 12:23:04,561 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 108 [2019-09-05 12:23:04,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:23:04,562 INFO L225 Difference]: With dead ends: 113 [2019-09-05 12:23:04,562 INFO L226 Difference]: Without dead ends: 110 [2019-09-05 12:23:04,562 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=203, Invalid=10099, Unknown=0, NotChecked=0, Total=10302 [2019-09-05 12:23:04,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-09-05 12:23:04,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-09-05 12:23:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-05 12:23:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 110 transitions. [2019-09-05 12:23:04,570 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 110 transitions. Word has length 108 [2019-09-05 12:23:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:23:04,571 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 110 transitions. [2019-09-05 12:23:04,571 INFO L476 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-09-05 12:23:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 110 transitions. [2019-09-05 12:23:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-05 12:23:04,571 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:23:04,571 INFO L399 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:23:04,572 INFO L418 AbstractCegarLoop]: === Iteration 99 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:23:04,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:23:04,572 INFO L82 PathProgramCache]: Analyzing trace with hash -560226777, now seen corresponding path program 98 times [2019-09-05 12:23:04,572 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:23:04,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:23:04,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:23:04,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:23:04,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:23:04,580 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:23:04,581 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:23:04,581 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:23:04,591 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-05 12:23:05,044 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-05 12:23:05,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 12:23:05,051 WARN L254 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 403 conjunts are in the unsatisfiable core [2019-09-05 12:23:05,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:23:09,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 12:23:09,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:23:09,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:23:09,808 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2019-09-05 12:23:09,809 INFO L454 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-09-05 12:23:09,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-09-05 12:23:09,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=10101, Unknown=0, NotChecked=0, Total=10302 [2019-09-05 12:23:09,809 INFO L87 Difference]: Start difference. First operand 110 states and 110 transitions. Second operand 102 states. [2019-09-05 12:23:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:23:17,103 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2019-09-05 12:23:17,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-09-05 12:23:17,103 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 109 [2019-09-05 12:23:17,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:23:17,104 INFO L225 Difference]: With dead ends: 114 [2019-09-05 12:23:17,104 INFO L226 Difference]: Without dead ends: 111 [2019-09-05 12:23:17,105 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=205, Invalid=10301, Unknown=0, NotChecked=0, Total=10506 [2019-09-05 12:23:17,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-05 12:23:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-09-05 12:23:17,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-09-05 12:23:17,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2019-09-05 12:23:17,114 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 109 [2019-09-05 12:23:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:23:17,114 INFO L475 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2019-09-05 12:23:17,114 INFO L476 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-09-05 12:23:17,114 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2019-09-05 12:23:17,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-05 12:23:17,114 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:23:17,114 INFO L399 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:23:17,115 INFO L418 AbstractCegarLoop]: === Iteration 100 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:23:17,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:23:17,115 INFO L82 PathProgramCache]: Analyzing trace with hash -187223376, now seen corresponding path program 99 times [2019-09-05 12:23:17,115 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-05 12:23:17,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-05 12:23:17,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:23:17,115 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 12:23:17,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:23:17,122 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 12:23:17,122 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 12:23:17,122 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 12:23:17,156 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2