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/nla-digbench/cohencu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:12:09,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:12:09,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:12:09,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:12:09,348 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:12:09,350 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:12:09,351 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:12:09,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:12:09,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:12:09,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:12:09,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:12:09,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:12:09,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:12:09,375 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:12:09,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:12:09,379 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:12:09,380 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:12:09,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:12:09,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:12:09,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:12:09,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:12:09,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:12:09,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:12:09,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:12:09,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:12:09,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 20:12:09,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 20:12:09,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 20:12:09,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 20:12:09,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 20:12:09,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 20:12:09,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 20:12:09,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 20:12:09,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:12:09,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:12:09,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:12:09,416 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 [2019-09-03 20:12:09,439 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:12:09,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:12:09,442 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:12:09,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:12:09,442 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:12:09,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:12:09,443 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:12:09,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:12:09,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:12:09,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:12:09,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:12:09,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:12:09,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:12:09,445 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:12:09,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:12:09,446 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:12:09,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:12:09,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:12:09,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:12:09,447 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:12:09,447 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:12:09,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:12:09,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:12:09,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:12:09,448 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:12:09,448 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:12:09,448 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:12:09,448 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:12:09,448 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:12:09,494 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:12:09,512 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:12:09,516 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:12:09,518 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:12:09,518 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:12:09,519 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohencu.c [2019-09-03 20:12:09,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7badedaec/e83bee8b6bf64cc68b29dcb7dcf08626/FLAG7ad264c9b [2019-09-03 20:12:10,015 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:12:10,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohencu.c [2019-09-03 20:12:10,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7badedaec/e83bee8b6bf64cc68b29dcb7dcf08626/FLAG7ad264c9b [2019-09-03 20:12:10,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7badedaec/e83bee8b6bf64cc68b29dcb7dcf08626 [2019-09-03 20:12:10,391 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:12:10,392 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:12:10,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:12:10,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:12:10,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:12:10,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:12:10" (1/1) ... [2019-09-03 20:12:10,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c5f355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:12:10, skipping insertion in model container [2019-09-03 20:12:10,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:12:10" (1/1) ... [2019-09-03 20:12:10,410 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:12:10,431 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:12:10,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:12:10,627 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:12:10,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:12:10,666 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:12:10,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:12:10 WrapperNode [2019-09-03 20:12:10,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:12:10,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:12:10,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:12:10,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:12:10,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:12:10" (1/1) ... [2019-09-03 20:12:10,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:12:10" (1/1) ... [2019-09-03 20:12:10,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:12:10" (1/1) ... [2019-09-03 20:12:10,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:12:10" (1/1) ... [2019-09-03 20:12:10,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:12:10" (1/1) ... [2019-09-03 20:12:10,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:12:10" (1/1) ... [2019-09-03 20:12:10,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:12:10" (1/1) ... [2019-09-03 20:12:10,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:12:10,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:12:10,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:12:10,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:12:10,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:12:10" (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 [2019-09-03 20:12:10,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:12:10,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:12:10,855 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:12:10,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:12:10,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:12:10,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 20:12:10,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 20:12:10,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:12:10,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:12:10,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:12:10,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:12:11,046 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:12:11,046 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:12:11,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:12:11 BoogieIcfgContainer [2019-09-03 20:12:11,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:12:11,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:12:11,050 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:12:11,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:12:11,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:12:10" (1/3) ... [2019-09-03 20:12:11,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390269c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:12:11, skipping insertion in model container [2019-09-03 20:12:11,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:12:10" (2/3) ... [2019-09-03 20:12:11,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@390269c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:12:11, skipping insertion in model container [2019-09-03 20:12:11,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:12:11" (3/3) ... [2019-09-03 20:12:11,056 INFO L109 eAbstractionObserver]: Analyzing ICFG cohencu.c [2019-09-03 20:12:11,067 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:12:11,075 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:12:11,099 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:12:11,152 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:12:11,153 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:12:11,153 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:12:11,153 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:12:11,153 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:12:11,154 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:12:11,154 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:12:11,154 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:12:11,154 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:12:11,177 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-03 20:12:11,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:12:11,182 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:11,182 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:11,184 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:11,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2145967090, now seen corresponding path program 1 times [2019-09-03 20:12:11,191 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:11,192 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:11,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:11,228 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:11,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:12:11,278 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:12:11,279 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:12:11,282 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:12:11,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:12:11,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:12:11,293 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-03 20:12:11,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:11,318 INFO L93 Difference]: Finished difference Result 53 states and 90 transitions. [2019-09-03 20:12:11,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:12:11,320 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 20:12:11,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:11,328 INFO L225 Difference]: With dead ends: 53 [2019-09-03 20:12:11,328 INFO L226 Difference]: Without dead ends: 24 [2019-09-03 20:12:11,332 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:12:11,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-03 20:12:11,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-03 20:12:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 20:12:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2019-09-03 20:12:11,373 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2019-09-03 20:12:11,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:11,373 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2019-09-03 20:12:11,373 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:12:11,374 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2019-09-03 20:12:11,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:12:11,374 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:11,374 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:11,375 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:11,375 INFO L82 PathProgramCache]: Analyzing trace with hash 2134586928, now seen corresponding path program 1 times [2019-09-03 20:12:11,375 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:11,376 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:11,376 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:11,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:11,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:12:11,535 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:12:11,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:12:11,537 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:12:11,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:12:11,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:12:11,540 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 5 states. [2019-09-03 20:12:11,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:11,667 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2019-09-03 20:12:11,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:12:11,668 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 20:12:11,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:11,669 INFO L225 Difference]: With dead ends: 30 [2019-09-03 20:12:11,669 INFO L226 Difference]: Without dead ends: 28 [2019-09-03 20:12:11,671 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:12:11,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-03 20:12:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-03 20:12:11,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-03 20:12:11,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2019-09-03 20:12:11,692 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2019-09-03 20:12:11,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:11,693 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2019-09-03 20:12:11,693 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:12:11,693 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2019-09-03 20:12:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-03 20:12:11,694 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:11,694 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:11,695 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:11,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:11,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1496147284, now seen corresponding path program 1 times [2019-09-03 20:12:11,695 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:11,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:11,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:11,697 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:11,697 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:11,705 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:11,706 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:11,706 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) [2019-09-03 20:12:11,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:11,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-03 20:12:11,758 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:12:11,875 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:11,875 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:12:11,875 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:12:11,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:12:11,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:12:11,876 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 8 states. [2019-09-03 20:12:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:12,293 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2019-09-03 20:12:12,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:12:12,293 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-09-03 20:12:12,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:12,295 INFO L225 Difference]: With dead ends: 51 [2019-09-03 20:12:12,295 INFO L226 Difference]: Without dead ends: 49 [2019-09-03 20:12:12,296 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:12:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-03 20:12:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-09-03 20:12:12,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-03 20:12:12,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2019-09-03 20:12:12,313 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 15 [2019-09-03 20:12:12,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:12,313 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2019-09-03 20:12:12,313 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:12:12,313 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2019-09-03 20:12:12,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-03 20:12:12,314 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:12,314 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:12,315 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:12,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:12,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1472996464, now seen corresponding path program 1 times [2019-09-03 20:12:12,315 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:12,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:12,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:12,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:12,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:12,323 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:12,323 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:12,323 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 [2019-09-03 20:12:12,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:12,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-03 20:12:12,355 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:12:12,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:12,452 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:12:12,452 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:12:12,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:12:12,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:12:12,454 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand 8 states. [2019-09-03 20:12:12,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:12,837 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2019-09-03 20:12:12,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:12:12,838 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-09-03 20:12:12,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:12,839 INFO L225 Difference]: With dead ends: 55 [2019-09-03 20:12:12,839 INFO L226 Difference]: Without dead ends: 53 [2019-09-03 20:12:12,840 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:12:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-03 20:12:12,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-09-03 20:12:12,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-03 20:12:12,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2019-09-03 20:12:12,853 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 20 [2019-09-03 20:12:12,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:12,853 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2019-09-03 20:12:12,853 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:12:12,853 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2019-09-03 20:12:12,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-03 20:12:12,854 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:12,854 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:12,855 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:12,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:12,855 INFO L82 PathProgramCache]: Analyzing trace with hash -378433900, now seen corresponding path program 1 times [2019-09-03 20:12:12,855 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:12,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:12,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:12,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:12,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:12,862 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:12,862 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:12,863 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) [2019-09-03 20:12:12,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:12,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 20:12:12,895 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 20:12:12,968 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:12,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:12:12,969 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:12:12,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:12:12,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:12:12,970 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 8 states. [2019-09-03 20:12:13,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:13,330 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2019-09-03 20:12:13,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:12:13,331 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2019-09-03 20:12:13,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:13,332 INFO L225 Difference]: With dead ends: 59 [2019-09-03 20:12:13,333 INFO L226 Difference]: Without dead ends: 51 [2019-09-03 20:12:13,333 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:12:13,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-03 20:12:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-03 20:12:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-03 20:12:13,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2019-09-03 20:12:13,344 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 25 [2019-09-03 20:12:13,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:13,344 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2019-09-03 20:12:13,345 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:12:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2019-09-03 20:12:13,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-03 20:12:13,346 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:13,346 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:13,347 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:13,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:13,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1836902192, now seen corresponding path program 1 times [2019-09-03 20:12:13,347 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:13,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:13,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:13,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:13,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:13,354 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:13,354 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:13,355 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 [2019-09-03 20:12:13,377 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:13,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:13,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 20:12:13,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-03 20:12:13,476 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:13,476 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-09-03 20:12:13,482 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:12:13,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:12:13,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:12:13,484 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 8 states. [2019-09-03 20:12:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:13,837 INFO L93 Difference]: Finished difference Result 70 states and 90 transitions. [2019-09-03 20:12:13,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:12:13,837 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-09-03 20:12:13,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:13,839 INFO L225 Difference]: With dead ends: 70 [2019-09-03 20:12:13,839 INFO L226 Difference]: Without dead ends: 68 [2019-09-03 20:12:13,840 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:12:13,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-03 20:12:13,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2019-09-03 20:12:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-09-03 20:12:13,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2019-09-03 20:12:13,852 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 42 [2019-09-03 20:12:13,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:13,852 INFO L475 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2019-09-03 20:12:13,852 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:12:13,852 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2019-09-03 20:12:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-03 20:12:13,854 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:13,854 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:13,854 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:13,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:13,855 INFO L82 PathProgramCache]: Analyzing trace with hash -223920524, now seen corresponding path program 2 times [2019-09-03 20:12:13,855 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:13,855 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:13,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:13,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:13,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:13,862 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:13,863 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:13,863 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:13,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:12:13,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:12:13,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:13,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-03 20:12:13,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:13,974 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-03 20:12:13,977 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:13,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:12:13,977 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:12:13,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:12:13,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:12:13,979 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 9 states. [2019-09-03 20:12:14,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:14,383 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2019-09-03 20:12:14,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:12:14,383 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-09-03 20:12:14,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:14,387 INFO L225 Difference]: With dead ends: 78 [2019-09-03 20:12:14,387 INFO L226 Difference]: Without dead ends: 75 [2019-09-03 20:12:14,387 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:12:14,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-03 20:12:14,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-09-03 20:12:14,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-03 20:12:14,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2019-09-03 20:12:14,403 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 47 [2019-09-03 20:12:14,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:14,404 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2019-09-03 20:12:14,404 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:12:14,404 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2019-09-03 20:12:14,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-03 20:12:14,405 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:14,406 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:14,406 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:14,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:14,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1224693684, now seen corresponding path program 3 times [2019-09-03 20:12:14,406 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:14,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:14,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:14,408 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:14,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:14,414 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:14,414 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:14,414 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:14,433 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:12:14,448 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 20:12:14,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:14,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-03 20:12:14,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:12:14,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:14,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-09-03 20:12:14,493 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:12:14,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:12:14,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:12:14,494 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 6 states. [2019-09-03 20:12:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:14,611 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2019-09-03 20:12:14,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:12:14,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2019-09-03 20:12:14,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:14,613 INFO L225 Difference]: With dead ends: 85 [2019-09-03 20:12:14,613 INFO L226 Difference]: Without dead ends: 82 [2019-09-03 20:12:14,614 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:12:14,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-09-03 20:12:14,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2019-09-03 20:12:14,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-09-03 20:12:14,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2019-09-03 20:12:14,626 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 57 [2019-09-03 20:12:14,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:14,627 INFO L475 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2019-09-03 20:12:14,627 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:12:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2019-09-03 20:12:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-03 20:12:14,628 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:14,629 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:14,629 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:14,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:14,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1975458643, now seen corresponding path program 1 times [2019-09-03 20:12:14,629 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:14,629 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:14,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:14,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:14,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:14,637 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:14,637 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:14,638 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 [2019-09-03 20:12:14,656 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:14,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-03 20:12:14,687 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:14,760 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:12:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-09-03 20:12:14,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:14,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:12:14,801 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:12:14,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:12:14,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:12:14,801 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 9 states. [2019-09-03 20:12:15,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:15,139 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2019-09-03 20:12:15,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:12:15,140 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2019-09-03 20:12:15,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:15,143 INFO L225 Difference]: With dead ends: 92 [2019-09-03 20:12:15,144 INFO L226 Difference]: Without dead ends: 90 [2019-09-03 20:12:15,144 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:12:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-09-03 20:12:15,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-09-03 20:12:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-03 20:12:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 102 transitions. [2019-09-03 20:12:15,167 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 102 transitions. Word has length 68 [2019-09-03 20:12:15,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:15,168 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 102 transitions. [2019-09-03 20:12:15,168 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:12:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 102 transitions. [2019-09-03 20:12:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-09-03 20:12:15,170 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:15,170 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:15,171 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:15,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:15,171 INFO L82 PathProgramCache]: Analyzing trace with hash -109766700, now seen corresponding path program 4 times [2019-09-03 20:12:15,171 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:15,171 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:15,173 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:15,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:15,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:15,186 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:15,186 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:15,186 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) [2019-09-03 20:12:15,199 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:15,222 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:12:15,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:15,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-03 20:12:15,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:15,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:12:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 36 proven. 67 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2019-09-03 20:12:15,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:15,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:12:15,394 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:12:15,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:12:15,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:12:15,395 INFO L87 Difference]: Start difference. First operand 90 states and 102 transitions. Second operand 9 states. [2019-09-03 20:12:15,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:15,549 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2019-09-03 20:12:15,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:12:15,550 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2019-09-03 20:12:15,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:15,551 INFO L225 Difference]: With dead ends: 96 [2019-09-03 20:12:15,551 INFO L226 Difference]: Without dead ends: 94 [2019-09-03 20:12:15,552 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:12:15,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-03 20:12:15,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2019-09-03 20:12:15,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-03 20:12:15,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2019-09-03 20:12:15,564 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 69 [2019-09-03 20:12:15,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:15,565 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2019-09-03 20:12:15,565 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:12:15,565 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2019-09-03 20:12:15,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-03 20:12:15,566 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:15,566 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:15,566 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:15,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:15,567 INFO L82 PathProgramCache]: Analyzing trace with hash 713083767, now seen corresponding path program 1 times [2019-09-03 20:12:15,567 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:15,567 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:15,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:15,568 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:15,568 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:15,573 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:15,573 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:15,573 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:12:15,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:15,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:15,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-03 20:12:15,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:15,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:12:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-09-03 20:12:15,729 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:15,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:12:15,729 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:12:15,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:12:15,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:12:15,730 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand 9 states. [2019-09-03 20:12:16,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:16,055 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2019-09-03 20:12:16,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:12:16,056 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2019-09-03 20:12:16,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:16,057 INFO L225 Difference]: With dead ends: 100 [2019-09-03 20:12:16,057 INFO L226 Difference]: Without dead ends: 98 [2019-09-03 20:12:16,058 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:12:16,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-03 20:12:16,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-09-03 20:12:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-03 20:12:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2019-09-03 20:12:16,070 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 73 [2019-09-03 20:12:16,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:16,071 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2019-09-03 20:12:16,071 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:12:16,071 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2019-09-03 20:12:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-03 20:12:16,072 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:16,072 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:16,073 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:16,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:16,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1693450736, now seen corresponding path program 5 times [2019-09-03 20:12:16,073 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:16,073 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:16,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:16,074 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:16,074 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:16,079 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:16,079 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:16,079 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) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:16,100 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:12:16,142 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-03 20:12:16,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:16,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-03 20:12:16,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 23 proven. 49 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-09-03 20:12:16,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:16,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-09-03 20:12:16,268 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:12:16,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:12:16,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:12:16,269 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand 9 states. [2019-09-03 20:12:16,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:16,690 INFO L93 Difference]: Finished difference Result 117 states and 137 transitions. [2019-09-03 20:12:16,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:12:16,692 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2019-09-03 20:12:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:16,694 INFO L225 Difference]: With dead ends: 117 [2019-09-03 20:12:16,694 INFO L226 Difference]: Without dead ends: 103 [2019-09-03 20:12:16,695 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:12:16,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-03 20:12:16,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2019-09-03 20:12:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-03 20:12:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2019-09-03 20:12:16,713 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 74 [2019-09-03 20:12:16,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:16,715 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2019-09-03 20:12:16,715 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:12:16,715 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2019-09-03 20:12:16,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-03 20:12:16,719 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:16,719 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:16,719 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:16,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:16,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1818484460, now seen corresponding path program 6 times [2019-09-03 20:12:16,720 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:16,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:16,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:16,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:16,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:16,738 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:16,738 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:16,738 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) [2019-09-03 20:12:16,756 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:17,072 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-09-03 20:12:17,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:17,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-03 20:12:17,076 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-09-03 20:12:17,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:17,231 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:12:17,231 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:12:17,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:12:17,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:12:17,232 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 10 states. [2019-09-03 20:12:17,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:17,750 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2019-09-03 20:12:17,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:12:17,751 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2019-09-03 20:12:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:17,753 INFO L225 Difference]: With dead ends: 117 [2019-09-03 20:12:17,753 INFO L226 Difference]: Without dead ends: 112 [2019-09-03 20:12:17,754 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:12:17,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-09-03 20:12:17,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-09-03 20:12:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-09-03 20:12:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2019-09-03 20:12:17,777 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 79 [2019-09-03 20:12:17,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:17,777 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2019-09-03 20:12:17,777 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:12:17,778 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2019-09-03 20:12:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-03 20:12:17,780 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:17,780 INFO L399 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:17,781 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:17,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:17,781 INFO L82 PathProgramCache]: Analyzing trace with hash -622434639, now seen corresponding path program 2 times [2019-09-03 20:12:17,781 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:17,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:17,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:17,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:17,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:17,802 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:17,802 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:17,802 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 [2019-09-03 20:12:17,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:12:17,871 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:12:17,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:17,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-03 20:12:17,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:17,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:12:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2019-09-03 20:12:18,069 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:18,069 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:12:18,070 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:12:18,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:12:18,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:12:18,071 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand 10 states. [2019-09-03 20:12:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:18,501 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2019-09-03 20:12:18,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:12:18,502 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 95 [2019-09-03 20:12:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:18,503 INFO L225 Difference]: With dead ends: 118 [2019-09-03 20:12:18,503 INFO L226 Difference]: Without dead ends: 116 [2019-09-03 20:12:18,504 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:12:18,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-09-03 20:12:18,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2019-09-03 20:12:18,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-09-03 20:12:18,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2019-09-03 20:12:18,515 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 95 [2019-09-03 20:12:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:18,516 INFO L475 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2019-09-03 20:12:18,516 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:12:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2019-09-03 20:12:18,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-03 20:12:18,517 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:18,517 INFO L399 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:18,517 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:18,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:18,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1439689715, now seen corresponding path program 2 times [2019-09-03 20:12:18,518 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:18,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:18,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:18,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:18,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:18,524 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:18,524 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:18,524 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) [2019-09-03 20:12:18,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:18,570 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:12:18,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:18,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-03 20:12:18,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:18,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 20:12:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 33 proven. 70 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-09-03 20:12:18,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:18,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:12:18,681 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:12:18,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:12:18,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:12:18,683 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand 10 states. [2019-09-03 20:12:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:19,091 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2019-09-03 20:12:19,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:12:19,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 100 [2019-09-03 20:12:19,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:19,092 INFO L225 Difference]: With dead ends: 126 [2019-09-03 20:12:19,092 INFO L226 Difference]: Without dead ends: 113 [2019-09-03 20:12:19,093 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:12:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-09-03 20:12:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-09-03 20:12:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-09-03 20:12:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2019-09-03 20:12:19,103 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 100 [2019-09-03 20:12:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:19,103 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2019-09-03 20:12:19,104 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:12:19,104 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2019-09-03 20:12:19,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-03 20:12:19,105 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:19,105 INFO L399 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:19,105 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:19,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:19,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1551568652, now seen corresponding path program 7 times [2019-09-03 20:12:19,106 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:19,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:19,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:19,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:19,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:19,111 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:19,111 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:19,111 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-03 20:12:19,135 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:19,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-03 20:12:19,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 33 proven. 82 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2019-09-03 20:12:19,294 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:19,295 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-09-03 20:12:19,295 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:12:19,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:12:19,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:12:19,296 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 10 states. [2019-09-03 20:12:19,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:19,886 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2019-09-03 20:12:19,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:12:19,886 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 101 [2019-09-03 20:12:19,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:19,888 INFO L225 Difference]: With dead ends: 132 [2019-09-03 20:12:19,888 INFO L226 Difference]: Without dead ends: 130 [2019-09-03 20:12:19,889 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:12:19,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-09-03 20:12:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2019-09-03 20:12:19,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-03 20:12:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2019-09-03 20:12:19,899 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 101 [2019-09-03 20:12:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:19,899 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2019-09-03 20:12:19,899 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:12:19,899 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2019-09-03 20:12:19,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-03 20:12:19,901 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:19,901 INFO L399 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:19,901 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:19,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:19,901 INFO L82 PathProgramCache]: Analyzing trace with hash 781710480, now seen corresponding path program 8 times [2019-09-03 20:12:19,901 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:19,902 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:19,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:19,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:12:19,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:19,907 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:19,907 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:19,907 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) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 20:12:19,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:12:19,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:12:19,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:19,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-03 20:12:19,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 80 proven. 43 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-09-03 20:12:20,087 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:12:20,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-09-03 20:12:20,087 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:12:20,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:12:20,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:12:20,088 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 11 states. [2019-09-03 20:12:20,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:20,515 INFO L93 Difference]: Finished difference Result 144 states and 159 transitions. [2019-09-03 20:12:20,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:12:20,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 106 [2019-09-03 20:12:20,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:20,517 INFO L225 Difference]: With dead ends: 144 [2019-09-03 20:12:20,517 INFO L226 Difference]: Without dead ends: 139 [2019-09-03 20:12:20,518 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:12:20,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-09-03 20:12:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2019-09-03 20:12:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-09-03 20:12:20,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 151 transitions. [2019-09-03 20:12:20,529 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 151 transitions. Word has length 106 [2019-09-03 20:12:20,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:20,530 INFO L475 AbstractCegarLoop]: Abstraction has 139 states and 151 transitions. [2019-09-03 20:12:20,530 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:12:20,530 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 151 transitions. [2019-09-03 20:12:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-09-03 20:12:20,531 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:20,532 INFO L399 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:20,532 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:20,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:20,532 INFO L82 PathProgramCache]: Analyzing trace with hash 874758701, now seen corresponding path program 3 times [2019-09-03 20:12:20,532 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:20,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:20,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:20,533 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:20,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:20,538 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 20:12:20,538 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 20:12:20,538 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-03 20:12:20,564 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2