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/loops-crafted-1/Mono1_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:04:09,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:04:09,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:04:09,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:04:09,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:04:09,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:04:09,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:04:09,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:04:09,134 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:04:09,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:04:09,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:04:09,137 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:04:09,137 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:04:09,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:04:09,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:04:09,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:04:09,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:04:09,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:04:09,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:04:09,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:04:09,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:04:09,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:04:09,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:04:09,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:04:09,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:04:09,154 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 20:04:09,155 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 20:04:09,156 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 20:04:09,156 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 20:04:09,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 20:04:09,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 20:04:09,159 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 20:04:09,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 20:04:09,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:04:09,160 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:04:09,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:04:09,161 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 20:04:09,175 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:04:09,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:04:09,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:04:09,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:04:09,177 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:04:09,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:04:09,178 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:04:09,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:04:09,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:04:09,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:04:09,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:04:09,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:04:09,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:04:09,179 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:04:09,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:04:09,179 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:04:09,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:04:09,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:04:09,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:04:09,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:04:09,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:04:09,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:04:09,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:04:09,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:04:09,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:04:09,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:04:09,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:04:09,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:04:09,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:04:09,210 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:04:09,222 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:04:09,226 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:04:09,227 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:04:09,228 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:04:09,228 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c [2019-09-03 20:04:09,304 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966de9ed7/5023a06df023425aab430bbcc4be9df7/FLAGe296027c9 [2019-09-03 20:04:09,730 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:04:09,731 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c [2019-09-03 20:04:09,737 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966de9ed7/5023a06df023425aab430bbcc4be9df7/FLAGe296027c9 [2019-09-03 20:04:10,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/966de9ed7/5023a06df023425aab430bbcc4be9df7 [2019-09-03 20:04:10,139 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:04:10,142 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:04:10,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:04:10,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:04:10,150 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:04:10,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf494db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10, skipping insertion in model container [2019-09-03 20:04:10,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,161 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:04:10,181 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:04:10,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:04:10,385 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:04:10,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:04:10,413 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:04:10,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10 WrapperNode [2019-09-03 20:04:10,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:04:10,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:04:10,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:04:10,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:04:10,509 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:04:10,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:04:10,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:04:10,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:04:10,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (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 20:04:10,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:04:10,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:04:10,584 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:04:10,584 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:04:10,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:04:10,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:04:10,585 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:04:10,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:04:10,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:04:10,747 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:04:10,747 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:04:10,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:04:10 BoogieIcfgContainer [2019-09-03 20:04:10,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:04:10,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:04:10,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:04:10,752 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:04:10,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:04:10" (1/3) ... [2019-09-03 20:04:10,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178b286f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:04:10, skipping insertion in model container [2019-09-03 20:04:10,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (2/3) ... [2019-09-03 20:04:10,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178b286f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:04:10, skipping insertion in model container [2019-09-03 20:04:10,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:04:10" (3/3) ... [2019-09-03 20:04:10,756 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono1_1-2.c [2019-09-03 20:04:10,765 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:04:10,773 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:04:10,790 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:04:10,823 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:04:10,824 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:04:10,824 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:04:10,824 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:04:10,824 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:04:10,824 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:04:10,825 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:04:10,825 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:04:10,825 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:04:10,839 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-09-03 20:04:10,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:04:10,843 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:10,844 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:10,846 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:10,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:10,851 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-09-03 20:04:10,853 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:10,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:10,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:10,891 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:10,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:10,939 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 20:04:10,941 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:04:10,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:04:10,944 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:04:10,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:04:10,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:04:10,958 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-09-03 20:04:10,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:10,978 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2019-09-03 20:04:10,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:04:10,979 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 20:04:10,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:10,985 INFO L225 Difference]: With dead ends: 29 [2019-09-03 20:04:10,986 INFO L226 Difference]: Without dead ends: 12 [2019-09-03 20:04:10,988 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 20:04:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-03 20:04:11,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-03 20:04:11,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-03 20:04:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-09-03 20:04:11,021 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2019-09-03 20:04:11,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:11,021 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-09-03 20:04:11,022 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:04:11,022 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-09-03 20:04:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:04:11,022 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:11,023 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:11,023 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:11,024 INFO L82 PathProgramCache]: Analyzing trace with hash -730736584, now seen corresponding path program 1 times [2019-09-03 20:04:11,024 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:11,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:11,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:11,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:11,192 WARN L188 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-09-03 20:04:11,197 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 20:04:11,197 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:04:11,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 20:04:11,199 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 20:04:11,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 20:04:11,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:04:11,201 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2019-09-03 20:04:11,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:11,279 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2019-09-03 20:04:11,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 20:04:11,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-03 20:04:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:11,281 INFO L225 Difference]: With dead ends: 21 [2019-09-03 20:04:11,282 INFO L226 Difference]: Without dead ends: 14 [2019-09-03 20:04:11,283 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:04:11,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-03 20:04:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-03 20:04:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-03 20:04:11,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-09-03 20:04:11,296 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-09-03 20:04:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:11,296 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-09-03 20:04:11,297 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 20:04:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-09-03 20:04:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-03 20:04:11,298 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:11,298 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:11,298 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:11,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:11,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1082855947, now seen corresponding path program 1 times [2019-09-03 20:04:11,299 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:11,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:11,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:11,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:11,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:11,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:11,452 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:11,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:11,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:11,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 20:04:11,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:11,536 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:11,537 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-03 20:04:11,537 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:04:11,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:04:11,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:04:11,539 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-09-03 20:04:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:11,583 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-09-03 20:04:11,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 20:04:11,584 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-09-03 20:04:11,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:11,585 INFO L225 Difference]: With dead ends: 23 [2019-09-03 20:04:11,585 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 20:04:11,586 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:04:11,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 20:04:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 20:04:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 20:04:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-09-03 20:04:11,591 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2019-09-03 20:04:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:11,591 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-09-03 20:04:11,592 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:04:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-09-03 20:04:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-03 20:04:11,592 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:11,593 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:11,593 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:11,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:11,594 INFO L82 PathProgramCache]: Analyzing trace with hash -167147406, now seen corresponding path program 2 times [2019-09-03 20:04:11,594 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:11,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:11,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:11,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:11,698 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:11,698 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:11,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:04:11,728 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:04:11,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:11,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 20:04:11,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:11,785 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:11,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-03 20:04:11,786 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:04:11,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:04:11,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:04:11,787 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-09-03 20:04:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:11,834 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-09-03 20:04:11,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:04:11,835 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-09-03 20:04:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:11,836 INFO L225 Difference]: With dead ends: 25 [2019-09-03 20:04:11,836 INFO L226 Difference]: Without dead ends: 18 [2019-09-03 20:04:11,836 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:04:11,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-03 20:04:11,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-03 20:04:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-03 20:04:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-03 20:04:11,842 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2019-09-03 20:04:11,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:11,842 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-03 20:04:11,842 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:04:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-03 20:04:11,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 20:04:11,843 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:11,843 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:11,844 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:11,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:11,844 INFO L82 PathProgramCache]: Analyzing trace with hash -639535185, now seen corresponding path program 3 times [2019-09-03 20:04:11,845 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:11,845 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:11,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,846 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:11,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:11,977 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:11,977 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:11,999 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:04:12,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 20:04:12,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:12,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 20:04:12,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 20:04:12,041 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:12,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-09-03 20:04:12,042 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:04:12,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:04:12,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:04:12,043 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-09-03 20:04:12,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:12,118 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-09-03 20:04:12,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:04:12,120 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-09-03 20:04:12,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:12,121 INFO L225 Difference]: With dead ends: 29 [2019-09-03 20:04:12,121 INFO L226 Difference]: Without dead ends: 22 [2019-09-03 20:04:12,122 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:04:12,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-03 20:04:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-09-03 20:04:12,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-03 20:04:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-03 20:04:12,128 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2019-09-03 20:04:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:12,129 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-03 20:04:12,129 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:04:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-03 20:04:12,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-03 20:04:12,130 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:12,130 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:12,130 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:12,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:12,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1988642215, now seen corresponding path program 1 times [2019-09-03 20:04:12,131 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:12,131 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:12,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:12,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:12,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:12,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:12,273 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:04:12,300 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:12,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-03 20:04:12,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:12,378 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:12,379 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-03 20:04:12,379 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:04:12,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:04:12,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:04:12,380 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2019-09-03 20:04:12,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:12,470 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2019-09-03 20:04:12,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:04:12,472 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-09-03 20:04:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:12,472 INFO L225 Difference]: With dead ends: 31 [2019-09-03 20:04:12,473 INFO L226 Difference]: Without dead ends: 23 [2019-09-03 20:04:12,473 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:04:12,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-03 20:04:12,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-03 20:04:12,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-03 20:04:12,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-09-03 20:04:12,485 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2019-09-03 20:04:12,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:12,485 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-09-03 20:04:12,485 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:04:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-09-03 20:04:12,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-03 20:04:12,486 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:12,486 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:12,486 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:12,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:12,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1766658852, now seen corresponding path program 2 times [2019-09-03 20:04:12,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:12,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:12,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:12,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:12,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:12,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:12,676 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:12,691 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:04:12,707 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:04:12,707 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:12,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 20:04:12,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:12,761 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:12,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2019-09-03 20:04:12,762 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:04:12,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:04:12,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:04:12,763 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-09-03 20:04:12,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:12,881 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-09-03 20:04:12,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:04:12,881 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-09-03 20:04:12,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:12,882 INFO L225 Difference]: With dead ends: 33 [2019-09-03 20:04:12,882 INFO L226 Difference]: Without dead ends: 25 [2019-09-03 20:04:12,883 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:04:12,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-03 20:04:12,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-03 20:04:12,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-03 20:04:12,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-09-03 20:04:12,888 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2019-09-03 20:04:12,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:12,888 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-09-03 20:04:12,889 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:04:12,889 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-09-03 20:04:12,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 20:04:12,890 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:12,890 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:12,890 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:12,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:12,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1105955487, now seen corresponding path program 3 times [2019-09-03 20:04:12,891 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:12,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:12,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:12,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:12,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:13,044 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:13,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:13,046 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:04:13,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:13,082 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 20:04:13,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:13,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-03 20:04:13,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-03 20:04:13,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:13,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 11 [2019-09-03 20:04:13,128 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:04:13,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:04:13,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:04:13,129 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2019-09-03 20:04:13,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:13,312 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-09-03 20:04:13,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 20:04:13,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-09-03 20:04:13,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:13,314 INFO L225 Difference]: With dead ends: 40 [2019-09-03 20:04:13,314 INFO L226 Difference]: Without dead ends: 32 [2019-09-03 20:04:13,315 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:04:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-03 20:04:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-09-03 20:04:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-03 20:04:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-09-03 20:04:13,320 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2019-09-03 20:04:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:13,320 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-09-03 20:04:13,321 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:04:13,321 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-09-03 20:04:13,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 20:04:13,321 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:13,322 INFO L399 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:13,322 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:13,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:13,322 INFO L82 PathProgramCache]: Analyzing trace with hash -806317607, now seen corresponding path program 4 times [2019-09-03 20:04:13,322 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:13,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:13,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:13,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:13,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:13,463 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:04:13,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:13,464 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:04:13,479 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:13,494 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:04:13,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:13,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-03 20:04:13,497 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:04:13,559 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:13,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-03 20:04:13,560 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:04:13,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:04:13,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:04:13,561 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2019-09-03 20:04:13,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:13,695 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2019-09-03 20:04:13,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:04:13,696 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-09-03 20:04:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:13,697 INFO L225 Difference]: With dead ends: 41 [2019-09-03 20:04:13,698 INFO L226 Difference]: Without dead ends: 31 [2019-09-03 20:04:13,699 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:04:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-03 20:04:13,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-09-03 20:04:13,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-03 20:04:13,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-09-03 20:04:13,707 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2019-09-03 20:04:13,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:13,708 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-09-03 20:04:13,708 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:04:13,708 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-09-03 20:04:13,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-03 20:04:13,709 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:13,709 INFO L399 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:13,709 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:13,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:13,712 INFO L82 PathProgramCache]: Analyzing trace with hash -251489706, now seen corresponding path program 5 times [2019-09-03 20:04:13,712 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:13,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:13,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:13,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:13,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:04:13,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:13,911 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:04:13,927 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:54,167 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-09-03 20:04:54,168 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:54,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-03 20:04:54,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:54,256 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:54,257 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 14 [2019-09-03 20:04:54,257 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:04:54,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:04:54,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:04:54,258 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 14 states. [2019-09-03 20:04:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:54,496 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-09-03 20:04:54,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:04:54,497 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2019-09-03 20:04:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:54,498 INFO L225 Difference]: With dead ends: 43 [2019-09-03 20:04:54,498 INFO L226 Difference]: Without dead ends: 33 [2019-09-03 20:04:54,498 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:04:54,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-03 20:04:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-09-03 20:04:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-03 20:04:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-09-03 20:04:54,503 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2019-09-03 20:04:54,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:54,504 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-09-03 20:04:54,504 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:04:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-09-03 20:04:54,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-03 20:04:54,505 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:54,505 INFO L399 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:54,505 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:54,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:54,505 INFO L82 PathProgramCache]: Analyzing trace with hash 362178451, now seen corresponding path program 6 times [2019-09-03 20:04:54,506 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:54,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:54,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:54,507 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:54,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:04:54,707 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:54,707 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:54,731 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:04:54,842 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-09-03 20:04:54,842 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:54,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-03 20:04:54,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-09-03 20:04:54,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:54,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6] total 16 [2019-09-03 20:04:54,953 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 20:04:54,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 20:04:54,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:04:54,956 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 16 states. [2019-09-03 20:04:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:59,852 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2019-09-03 20:04:59,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:04:59,853 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2019-09-03 20:04:59,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:59,856 INFO L225 Difference]: With dead ends: 52 [2019-09-03 20:04:59,856 INFO L226 Difference]: Without dead ends: 42 [2019-09-03 20:04:59,857 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:04:59,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-03 20:04:59,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2019-09-03 20:04:59,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-03 20:04:59,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2019-09-03 20:04:59,873 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32 [2019-09-03 20:04:59,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:59,873 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2019-09-03 20:04:59,873 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 20:04:59,873 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2019-09-03 20:04:59,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-03 20:04:59,876 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:59,877 INFO L399 BasicCegarLoop]: trace histogram [13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:59,877 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:59,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:59,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1390824821, now seen corresponding path program 7 times [2019-09-03 20:04:59,877 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:59,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:59,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:59,879 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:59,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 20:05:00,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:00,124 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:05:00,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:05:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:00,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-03 20:05:00,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 55 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 20:05:00,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:00,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-03 20:05:00,218 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:05:00,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:05:00,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:05:00,219 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 14 states. [2019-09-03 20:05:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:00,400 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-09-03 20:05:00,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:05:00,402 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-09-03 20:05:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:00,403 INFO L225 Difference]: With dead ends: 51 [2019-09-03 20:05:00,403 INFO L226 Difference]: Without dead ends: 39 [2019-09-03 20:05:00,404 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:05:00,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-03 20:05:00,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-03 20:05:00,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-03 20:05:00,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-09-03 20:05:00,409 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 36 [2019-09-03 20:05:00,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:00,409 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-09-03 20:05:00,409 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:05:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-09-03 20:05:00,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-03 20:05:00,410 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:00,413 INFO L399 BasicCegarLoop]: trace histogram [14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:00,414 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:00,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:00,414 INFO L82 PathProgramCache]: Analyzing trace with hash 26600968, now seen corresponding path program 8 times [2019-09-03 20:05:00,414 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:00,414 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:00,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:00,415 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:00,415 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 60 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 20:05:00,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:00,597 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:05:00,609 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:05:00,624 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:05:00,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:00,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-03 20:05:00,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:00,721 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:00,721 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 18 [2019-09-03 20:05:00,722 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 20:05:00,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 20:05:00,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:05:00,723 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 18 states. [2019-09-03 20:05:01,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:01,016 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2019-09-03 20:05:01,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:05:01,016 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2019-09-03 20:05:01,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:01,017 INFO L225 Difference]: With dead ends: 53 [2019-09-03 20:05:01,017 INFO L226 Difference]: Without dead ends: 41 [2019-09-03 20:05:01,018 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:05:01,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-03 20:05:01,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-03 20:05:01,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-03 20:05:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2019-09-03 20:05:01,023 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 38 [2019-09-03 20:05:01,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:01,024 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2019-09-03 20:05:01,024 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 20:05:01,024 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2019-09-03 20:05:01,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-03 20:05:01,025 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:01,025 INFO L399 BasicCegarLoop]: trace histogram [15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:01,025 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:01,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:01,025 INFO L82 PathProgramCache]: Analyzing trace with hash 668151365, now seen corresponding path program 9 times [2019-09-03 20:05:01,026 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:01,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:01,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:01,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:01,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 65 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-03 20:05:01,260 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:01,260 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:05:01,281 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:05:01,320 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-09-03 20:05:01,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:01,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-03 20:05:01,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 84 proven. 9 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-09-03 20:05:01,441 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:01,441 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 6] total 19 [2019-09-03 20:05:01,442 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:05:01,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:05:01,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:05:01,442 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 19 states. [2019-09-03 20:05:05,138 WARN L188 SmtUtils]: Spent 2.34 s on a formula simplification that was a NOOP. DAG size: 16 [2019-09-03 20:05:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:09,772 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2019-09-03 20:05:09,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:05:09,773 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2019-09-03 20:05:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:09,774 INFO L225 Difference]: With dead ends: 60 [2019-09-03 20:05:09,774 INFO L226 Difference]: Without dead ends: 48 [2019-09-03 20:05:09,774 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:05:09,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-03 20:05:09,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2019-09-03 20:05:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-03 20:05:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-09-03 20:05:09,780 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 40 [2019-09-03 20:05:09,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:09,780 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-09-03 20:05:09,781 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:05:09,781 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-09-03 20:05:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-03 20:05:09,781 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:09,781 INFO L399 BasicCegarLoop]: trace histogram [17, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:09,782 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:09,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2096596925, now seen corresponding path program 10 times [2019-09-03 20:05:09,782 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:09,782 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:09,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:09,783 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:09,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 98 proven. 182 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-03 20:05:10,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:10,005 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:05:10,028 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:05:10,043 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:05:10,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:10,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-03 20:05:10,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 98 proven. 182 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-03 20:05:10,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:10,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-03 20:05:10,110 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 20:05:10,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 20:05:10,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:05:10,111 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 17 states. [2019-09-03 20:05:10,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:10,426 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2019-09-03 20:05:10,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 20:05:10,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2019-09-03 20:05:10,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:10,427 INFO L225 Difference]: With dead ends: 61 [2019-09-03 20:05:10,427 INFO L226 Difference]: Without dead ends: 47 [2019-09-03 20:05:10,428 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:05:10,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-03 20:05:10,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-09-03 20:05:10,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-03 20:05:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-09-03 20:05:10,433 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 44 [2019-09-03 20:05:10,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:10,434 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-09-03 20:05:10,434 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 20:05:10,434 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-09-03 20:05:10,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-03 20:05:10,435 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:10,435 INFO L399 BasicCegarLoop]: trace histogram [18, 14, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:10,435 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:10,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:10,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1661276614, now seen corresponding path program 11 times [2019-09-03 20:05:10,435 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:10,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:10,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:10,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:10,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 105 proven. 210 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-03 20:05:10,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:10,713 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:05:10,735 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:06:38,448 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-09-03 20:06:38,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:39,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 38 conjunts are in the unsatisfiable core [2019-09-03 20:06:39,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:06:39,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:06:39,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 21 [2019-09-03 20:06:39,206 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 20:06:39,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 20:06:39,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:06:39,207 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 21 states. [2019-09-03 20:06:39,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:39,646 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-09-03 20:06:39,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:06:39,646 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2019-09-03 20:06:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:39,647 INFO L225 Difference]: With dead ends: 63 [2019-09-03 20:06:39,647 INFO L226 Difference]: Without dead ends: 49 [2019-09-03 20:06:39,648 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:06:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-03 20:06:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-09-03 20:06:39,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-03 20:06:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-09-03 20:06:39,662 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 46 [2019-09-03 20:06:39,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:39,663 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-09-03 20:06:39,663 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 20:06:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-09-03 20:06:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-03 20:06:39,668 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:39,669 INFO L399 BasicCegarLoop]: trace histogram [19, 15, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:39,669 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:39,669 INFO L82 PathProgramCache]: Analyzing trace with hash -910251657, now seen corresponding path program 12 times [2019-09-03 20:06:39,669 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:39,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:39,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:39,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:39,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:06:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 112 proven. 240 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-03 20:06:39,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:06:39,957 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:06:39,972 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:06:42,152 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-03 20:06:42,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:42,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-03 20:06:42,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 204 proven. 98 refuted. 3 times theorem prover too weak. 56 trivial. 0 not checked. [2019-09-03 20:06:47,433 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:06:47,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2019-09-03 20:06:47,434 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-03 20:06:47,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-03 20:06:47,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=693, Unknown=2, NotChecked=0, Total=870 [2019-09-03 20:06:47,435 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 30 states. [2019-09-03 20:07:02,528 WARN L188 SmtUtils]: Spent 5.11 s on a formula simplification. DAG size of input: 48 DAG size of output: 12 [2019-09-03 20:07:12,996 WARN L188 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 40 DAG size of output: 12 [2019-09-03 20:07:27,437 WARN L188 SmtUtils]: Spent 6.75 s on a formula simplification. DAG size of input: 44 DAG size of output: 16 [2019-09-03 20:07:35,236 WARN L188 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2019-09-03 20:07:57,381 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ c_main_~x~0 4294967282) 4294967296) 10000000) (< (mod (+ c_main_~x~0 4294967289) 4294967296) 10000000) (< (mod (+ c_main_~x~0 4294967294) 4294967296) 10000000) (< (mod (+ c_main_~x~0 4294967286) 4294967296) 10000000) (< (mod (+ c_main_~x~0 4294967295) 4294967296) 10000000) (< (mod (+ c_main_~x~0 4294967293) 4294967296) 10000000) (< (mod (+ c_main_~x~0 4294967290) 4294967296) 10000000)) is different from false [2019-09-03 20:08:17,674 WARN L188 SmtUtils]: Spent 3.44 s on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2019-09-03 20:09:00,378 WARN L188 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2019-09-03 20:09:13,752 WARN L188 SmtUtils]: Spent 2.79 s on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-03 20:09:23,810 WARN L188 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-03 20:09:34,994 WARN L188 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2019-09-03 20:09:35,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:09:35,062 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2019-09-03 20:09:35,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-03 20:09:35,062 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 48 [2019-09-03 20:09:35,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:09:35,064 INFO L225 Difference]: With dead ends: 94 [2019-09-03 20:09:35,064 INFO L226 Difference]: Without dead ends: 80 [2019-09-03 20:09:35,066 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 131.7s TimeCoverageRelationStatistics Valid=377, Invalid=1408, Unknown=25, NotChecked=82, Total=1892 [2019-09-03 20:09:35,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-03 20:09:35,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2019-09-03 20:09:35,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-03 20:09:35,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2019-09-03 20:09:35,073 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 48 [2019-09-03 20:09:35,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:09:35,074 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2019-09-03 20:09:35,074 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-03 20:09:35,074 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2019-09-03 20:09:35,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-03 20:09:35,075 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:09:35,075 INFO L399 BasicCegarLoop]: trace histogram [22, 16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:09:35,075 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:09:35,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:09:35,075 INFO L82 PathProgramCache]: Analyzing trace with hash -741259606, now seen corresponding path program 13 times [2019-09-03 20:09:35,075 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:09:35,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:09:35,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:35,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:09:35,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:35,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:09:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 187 proven. 272 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-03 20:09:35,389 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:09:35,389 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:09:35,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:09:35,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:09:35,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-03 20:09:35,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:09:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 187 proven. 272 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-03 20:09:35,496 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:09:35,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-03 20:09:35,497 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:09:35,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:09:35,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:09:35,498 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand 20 states. [2019-09-03 20:09:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:09:35,885 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2019-09-03 20:09:35,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 20:09:35,885 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2019-09-03 20:09:35,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:09:35,886 INFO L225 Difference]: With dead ends: 83 [2019-09-03 20:09:35,886 INFO L226 Difference]: Without dead ends: 61 [2019-09-03 20:09:35,887 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:09:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-03 20:09:35,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-09-03 20:09:35,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-03 20:09:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-09-03 20:09:35,897 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 54 [2019-09-03 20:09:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:09:35,898 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-09-03 20:09:35,898 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:09:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-09-03 20:09:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-03 20:09:35,900 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:09:35,900 INFO L399 BasicCegarLoop]: trace histogram [23, 17, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:09:35,900 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:09:35,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:09:35,900 INFO L82 PathProgramCache]: Analyzing trace with hash -554142489, now seen corresponding path program 14 times [2019-09-03 20:09:35,901 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:09:35,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:09:35,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:35,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:09:35,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:09:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 198 proven. 306 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-03 20:09:36,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:09:36,190 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:09:36,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:09:36,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:09:36,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:09:36,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-03 20:09:36,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:09:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:09:36,421 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:09:36,421 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26] total 27 [2019-09-03 20:09:36,422 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-03 20:09:36,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-03 20:09:36,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:09:36,423 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 27 states. [2019-09-03 20:09:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:09:37,087 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2019-09-03 20:09:37,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:09:37,088 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2019-09-03 20:09:37,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:09:37,089 INFO L225 Difference]: With dead ends: 85 [2019-09-03 20:09:37,089 INFO L226 Difference]: Without dead ends: 63 [2019-09-03 20:09:37,089 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:09:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-03 20:09:37,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-03 20:09:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-03 20:09:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2019-09-03 20:09:37,096 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 56 [2019-09-03 20:09:37,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:09:37,096 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2019-09-03 20:09:37,096 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-03 20:09:37,096 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2019-09-03 20:09:37,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-03 20:09:37,097 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:09:37,097 INFO L399 BasicCegarLoop]: trace histogram [24, 18, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:09:37,097 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:09:37,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:09:37,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1123219484, now seen corresponding path program 15 times [2019-09-03 20:09:37,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:09:37,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:09:37,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:37,099 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:09:37,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:09:37,402 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 209 proven. 342 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-03 20:09:37,402 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:09:37,403 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:09:37,416 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:09:37,484 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-09-03 20:09:37,484 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:09:37,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-03 20:09:37,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:09:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2019-09-03 20:09:37,705 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:09:37,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-09-03 20:09:37,706 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 20:09:37,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 20:09:37,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:09:37,706 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 28 states. [2019-09-03 20:09:47,904 WARN L188 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 32 DAG size of output: 12 [2019-09-03 20:10:03,365 WARN L188 SmtUtils]: Spent 4.34 s on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2019-09-03 20:10:17,963 WARN L188 SmtUtils]: Spent 5.92 s on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2019-09-03 20:10:34,468 WARN L188 SmtUtils]: Spent 723.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2019-09-03 20:10:39,785 WARN L188 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-03 20:11:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:11:08,633 INFO L93 Difference]: Finished difference Result 102 states and 129 transitions. [2019-09-03 20:11:08,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-03 20:11:08,634 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 58 [2019-09-03 20:11:08,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:11:08,634 INFO L225 Difference]: With dead ends: 102 [2019-09-03 20:11:08,634 INFO L226 Difference]: Without dead ends: 80 [2019-09-03 20:11:08,635 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 69.4s TimeCoverageRelationStatistics Valid=288, Invalid=1039, Unknown=5, NotChecked=0, Total=1332 [2019-09-03 20:11:08,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-03 20:11:08,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2019-09-03 20:11:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-03 20:11:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2019-09-03 20:11:08,641 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 58 [2019-09-03 20:11:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:11:08,641 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2019-09-03 20:11:08,642 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 20:11:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2019-09-03 20:11:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-03 20:11:08,642 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:11:08,643 INFO L399 BasicCegarLoop]: trace histogram [26, 19, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:11:08,643 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:11:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:11:08,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1126866852, now seen corresponding path program 16 times [2019-09-03 20:11:08,643 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:11:08,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:11:08,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:08,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:11:08,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:11:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 260 proven. 380 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-03 20:11:09,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:11:09,000 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:11:09,009 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:11:09,034 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:11:09,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:11:09,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-03 20:11:09,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:11:09,108 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 260 proven. 380 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-03 20:11:09,113 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:11:09,113 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-03 20:11:09,113 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:11:09,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:11:09,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:11:09,114 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 23 states. [2019-09-03 20:11:09,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:11:09,657 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2019-09-03 20:11:09,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:11:09,657 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2019-09-03 20:11:09,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:11:09,658 INFO L225 Difference]: With dead ends: 85 [2019-09-03 20:11:09,659 INFO L226 Difference]: Without dead ends: 65 [2019-09-03 20:11:09,660 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:11:09,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-03 20:11:09,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-09-03 20:11:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-03 20:11:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2019-09-03 20:11:09,665 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2019-09-03 20:11:09,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:11:09,666 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2019-09-03 20:11:09,666 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:11:09,666 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2019-09-03 20:11:09,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-03 20:11:09,667 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:11:09,667 INFO L399 BasicCegarLoop]: trace histogram [27, 20, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:11:09,667 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:11:09,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:11:09,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1362952601, now seen corresponding path program 17 times [2019-09-03 20:11:09,668 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:11:09,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:11:09,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:09,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:11:09,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:09,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:11:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 273 proven. 420 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-03 20:11:10,051 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:11:10,051 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:11:10,061 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:15:50,278 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-03 20:15:50,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:15:51,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 56 conjunts are in the unsatisfiable core [2019-09-03 20:15:51,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:15:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:15:52,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:15:52,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 29] total 30 [2019-09-03 20:15:52,189 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-03 20:15:52,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-03 20:15:52,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:15:52,190 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 30 states. [2019-09-03 20:15:52,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:15:52,984 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2019-09-03 20:15:52,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 20:15:52,988 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2019-09-03 20:15:52,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:15:52,989 INFO L225 Difference]: With dead ends: 87 [2019-09-03 20:15:52,989 INFO L226 Difference]: Without dead ends: 67 [2019-09-03 20:15:52,990 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:15:52,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-03 20:15:52,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-09-03 20:15:52,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-03 20:15:52,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2019-09-03 20:15:52,995 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 64 [2019-09-03 20:15:52,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:15:52,995 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2019-09-03 20:15:52,995 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-03 20:15:52,995 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2019-09-03 20:15:52,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-03 20:15:52,996 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:15:52,996 INFO L399 BasicCegarLoop]: trace histogram [28, 21, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:15:52,996 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:15:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:15:52,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1782663062, now seen corresponding path program 18 times [2019-09-03 20:15:52,997 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:15:52,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:15:52,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:52,997 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:15:52,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:15:53,481 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 286 proven. 462 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-03 20:15:53,482 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:15:53,482 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:15:53,516 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:18:27,256 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-09-03 20:18:27,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:28,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-03 20:18:28,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:30,569 WARN L188 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2019-09-03 20:18:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 390 proven. 295 refuted. 9 times theorem prover too weak. 90 trivial. 0 not checked. [2019-09-03 20:18:48,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:18:48,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 43 [2019-09-03 20:18:48,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-03 20:18:48,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-03 20:18:48,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1497, Unknown=5, NotChecked=0, Total=1806 [2019-09-03 20:18:48,715 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 43 states. [2019-09-03 20:18:50,428 WARN L188 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 15