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/array-examples/standard_init9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 10:13:03,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 10:13:03,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 10:13:03,164 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 10:13:03,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 10:13:03,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 10:13:03,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 10:13:03,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 10:13:03,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 10:13:03,172 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 10:13:03,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 10:13:03,174 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 10:13:03,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 10:13:03,175 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 10:13:03,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 10:13:03,178 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 10:13:03,178 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 10:13:03,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 10:13:03,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 10:13:03,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 10:13:03,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 10:13:03,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 10:13:03,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 10:13:03,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 10:13:03,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 10:13:03,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 10:13:03,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 10:13:03,195 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 10:13:03,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 10:13:03,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 10:13:03,198 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 10:13:03,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 10:13:03,199 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 10:13:03,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 10:13:03,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 10:13:03,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 10:13:03,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-07 10:13:03,216 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 10:13:03,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 10:13:03,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 10:13:03,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 10:13:03,218 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 10:13:03,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 10:13:03,219 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 10:13:03,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 10:13:03,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 10:13:03,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 10:13:03,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 10:13:03,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 10:13:03,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 10:13:03,220 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 10:13:03,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 10:13:03,220 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 10:13:03,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 10:13:03,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 10:13:03,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 10:13:03,221 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 10:13:03,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 10:13:03,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 10:13:03,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 10:13:03,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 10:13:03,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 10:13:03,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 10:13:03,223 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 10:13:03,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 10:13:03,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 10:13:03,254 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 10:13:03,267 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 10:13:03,271 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 10:13:03,272 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 10:13:03,272 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 10:13:03,273 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2019-09-07 10:13:03,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b2730036/9d43ef0ee65245359f6d5eeab4b66b49/FLAGd6d150b25 [2019-09-07 10:13:03,816 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 10:13:03,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2019-09-07 10:13:03,824 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b2730036/9d43ef0ee65245359f6d5eeab4b66b49/FLAGd6d150b25 [2019-09-07 10:13:04,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b2730036/9d43ef0ee65245359f6d5eeab4b66b49 [2019-09-07 10:13:04,217 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 10:13:04,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 10:13:04,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 10:13:04,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 10:13:04,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 10:13:04,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:13:04" (1/1) ... [2019-09-07 10:13:04,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17114e0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:13:04, skipping insertion in model container [2019-09-07 10:13:04,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 10:13:04" (1/1) ... [2019-09-07 10:13:04,237 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 10:13:04,256 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 10:13:04,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:13:04,478 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 10:13:04,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 10:13:04,625 INFO L192 MainTranslator]: Completed translation [2019-09-07 10:13:04,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:13:04 WrapperNode [2019-09-07 10:13:04,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 10:13:04,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 10:13:04,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 10:13:04,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 10:13:04,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:13:04" (1/1) ... [2019-09-07 10:13:04,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:13:04" (1/1) ... [2019-09-07 10:13:04,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:13:04" (1/1) ... [2019-09-07 10:13:04,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:13:04" (1/1) ... [2019-09-07 10:13:04,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:13:04" (1/1) ... [2019-09-07 10:13:04,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:13:04" (1/1) ... [2019-09-07 10:13:04,667 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:13:04" (1/1) ... [2019-09-07 10:13:04,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 10:13:04,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 10:13:04,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 10:13:04,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 10:13:04,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:13:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 10:13:04,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 10:13:04,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 10:13:04,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 10:13:04,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 10:13:04,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 10:13:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 10:13:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 10:13:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 10:13:04,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 10:13:04,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 10:13:04,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 10:13:04,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 10:13:04,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 10:13:05,013 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 10:13:05,013 INFO L283 CfgBuilder]: Removed 10 assume(true) statements. [2019-09-07 10:13:05,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:13:05 BoogieIcfgContainer [2019-09-07 10:13:05,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 10:13:05,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 10:13:05,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 10:13:05,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 10:13:05,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 10:13:04" (1/3) ... [2019-09-07 10:13:05,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ab52b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:13:05, skipping insertion in model container [2019-09-07 10:13:05,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 10:13:04" (2/3) ... [2019-09-07 10:13:05,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59ab52b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 10:13:05, skipping insertion in model container [2019-09-07 10:13:05,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 10:13:05" (3/3) ... [2019-09-07 10:13:05,023 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-1.i [2019-09-07 10:13:05,040 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 10:13:05,053 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 10:13:05,091 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 10:13:05,124 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 10:13:05,125 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 10:13:05,125 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 10:13:05,125 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 10:13:05,125 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 10:13:05,125 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 10:13:05,126 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 10:13:05,126 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 10:13:05,126 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 10:13:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-09-07 10:13:05,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-07 10:13:05,159 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:05,164 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:05,170 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:05,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1872712154, now seen corresponding path program 1 times [2019-09-07 10:13:05,191 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:05,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:05,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:05,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:13:05,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:05,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:13:05,337 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:13:05,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 10:13:05,341 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 10:13:05,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 10:13:05,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 10:13:05,361 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2019-09-07 10:13:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:05,389 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2019-09-07 10:13:05,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 10:13:05,391 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2019-09-07 10:13:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:05,399 INFO L225 Difference]: With dead ends: 71 [2019-09-07 10:13:05,399 INFO L226 Difference]: Without dead ends: 34 [2019-09-07 10:13:05,403 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 [2019-09-07 10:13:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-07 10:13:05,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-09-07 10:13:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-07 10:13:05,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-09-07 10:13:05,448 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 29 [2019-09-07 10:13:05,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:05,448 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-09-07 10:13:05,449 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 10:13:05,449 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-09-07 10:13:05,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-07 10:13:05,450 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:05,450 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:05,451 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:05,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:05,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1932733742, now seen corresponding path program 1 times [2019-09-07 10:13:05,452 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:05,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:05,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:05,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:13:05,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 10:13:05,534 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 10:13:05,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 10:13:05,537 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 10:13:05,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 10:13:05,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 10:13:05,538 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 3 states. [2019-09-07 10:13:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:05,746 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2019-09-07 10:13:05,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 10:13:05,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-09-07 10:13:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:05,748 INFO L225 Difference]: With dead ends: 70 [2019-09-07 10:13:05,750 INFO L226 Difference]: Without dead ends: 43 [2019-09-07 10:13:05,752 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 10:13:05,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-07 10:13:05,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-07 10:13:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-07 10:13:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-09-07 10:13:05,779 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2019-09-07 10:13:05,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:05,780 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-09-07 10:13:05,780 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 10:13:05,780 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-09-07 10:13:05,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-07 10:13:05,783 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:05,783 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:05,784 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:05,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:05,785 INFO L82 PathProgramCache]: Analyzing trace with hash 97911482, now seen corresponding path program 1 times [2019-09-07 10:13:05,785 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:05,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:05,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:05,789 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:13:05,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 10:13:05,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:05,925 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:13:05,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:13:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:05,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 10:13:05,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:13:06,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:06,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 10:13:06,048 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 10:13:06,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 10:13:06,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:13:06,054 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 5 states. [2019-09-07 10:13:06,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:06,233 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2019-09-07 10:13:06,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 10:13:06,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2019-09-07 10:13:06,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:06,237 INFO L225 Difference]: With dead ends: 87 [2019-09-07 10:13:06,237 INFO L226 Difference]: Without dead ends: 52 [2019-09-07 10:13:06,238 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 10:13:06,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-07 10:13:06,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-09-07 10:13:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-07 10:13:06,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-09-07 10:13:06,248 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2019-09-07 10:13:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:06,248 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-09-07 10:13:06,249 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 10:13:06,249 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-09-07 10:13:06,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-07 10:13:06,250 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:06,251 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:06,251 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:06,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1965553710, now seen corresponding path program 2 times [2019-09-07 10:13:06,252 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:06,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:06,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:06,254 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:13:06,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-07 10:13:06,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:06,356 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:13:06,380 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:13:06,448 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:13:06,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:13:06,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 10:13:06,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-07 10:13:06,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:06,491 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 10:13:06,492 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 10:13:06,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 10:13:06,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:13:06,494 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 6 states. [2019-09-07 10:13:06,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:06,645 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2019-09-07 10:13:06,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 10:13:06,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2019-09-07 10:13:06,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:06,647 INFO L225 Difference]: With dead ends: 104 [2019-09-07 10:13:06,647 INFO L226 Difference]: Without dead ends: 61 [2019-09-07 10:13:06,648 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 10:13:06,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-07 10:13:06,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-09-07 10:13:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-09-07 10:13:06,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2019-09-07 10:13:06,657 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 47 [2019-09-07 10:13:06,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:06,658 INFO L475 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2019-09-07 10:13:06,658 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 10:13:06,658 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2019-09-07 10:13:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-07 10:13:06,660 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:06,660 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:06,660 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:06,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:06,661 INFO L82 PathProgramCache]: Analyzing trace with hash 369658042, now seen corresponding path program 3 times [2019-09-07 10:13:06,661 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:06,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:06,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:06,662 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:13:06,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-09-07 10:13:06,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:06,772 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:13:06,794 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:13:06,918 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 10:13:06,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:13:06,919 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 10:13:06,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:13:06,961 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:06,961 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 10:13:06,964 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 10:13:06,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 10:13:06,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:13:06,965 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 7 states. [2019-09-07 10:13:07,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:07,138 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2019-09-07 10:13:07,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 10:13:07,139 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2019-09-07 10:13:07,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:07,140 INFO L225 Difference]: With dead ends: 121 [2019-09-07 10:13:07,140 INFO L226 Difference]: Without dead ends: 70 [2019-09-07 10:13:07,143 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 10:13:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-07 10:13:07,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-09-07 10:13:07,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-07 10:13:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2019-09-07 10:13:07,160 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 56 [2019-09-07 10:13:07,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:07,160 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2019-09-07 10:13:07,161 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 10:13:07,161 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2019-09-07 10:13:07,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-07 10:13:07,165 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:07,166 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:07,166 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:07,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:07,167 INFO L82 PathProgramCache]: Analyzing trace with hash 24657106, now seen corresponding path program 4 times [2019-09-07 10:13:07,167 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:07,168 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:07,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:07,169 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:13:07,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-09-07 10:13:07,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:07,316 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:13:07,331 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:13:07,382 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:13:07,383 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:13:07,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 10:13:07,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-09-07 10:13:07,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:07,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-07 10:13:07,430 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 10:13:07,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 10:13:07,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:13:07,432 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 8 states. [2019-09-07 10:13:07,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:07,611 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2019-09-07 10:13:07,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 10:13:07,612 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2019-09-07 10:13:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:07,613 INFO L225 Difference]: With dead ends: 138 [2019-09-07 10:13:07,613 INFO L226 Difference]: Without dead ends: 79 [2019-09-07 10:13:07,614 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 10:13:07,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-07 10:13:07,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-07 10:13:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-07 10:13:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2019-09-07 10:13:07,624 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 65 [2019-09-07 10:13:07,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:07,625 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2019-09-07 10:13:07,625 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 10:13:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2019-09-07 10:13:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-09-07 10:13:07,627 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:07,627 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:07,627 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:07,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:07,628 INFO L82 PathProgramCache]: Analyzing trace with hash -217477446, now seen corresponding path program 5 times [2019-09-07 10:13:07,628 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:07,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:07,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:07,630 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:13:07,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:07,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-09-07 10:13:07,816 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:07,816 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:13:07,841 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:13:23,930 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-07 10:13:23,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:13:23,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 10:13:23,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:23,986 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-09-07 10:13:24,000 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:24,000 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 10:13:24,001 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 10:13:24,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 10:13:24,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:13:24,002 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 9 states. [2019-09-07 10:13:24,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:24,143 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2019-09-07 10:13:24,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 10:13:24,144 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2019-09-07 10:13:24,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:24,145 INFO L225 Difference]: With dead ends: 155 [2019-09-07 10:13:24,145 INFO L226 Difference]: Without dead ends: 88 [2019-09-07 10:13:24,146 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 10:13:24,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-07 10:13:24,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-09-07 10:13:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-07 10:13:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2019-09-07 10:13:24,156 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 74 [2019-09-07 10:13:24,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:24,156 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2019-09-07 10:13:24,156 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 10:13:24,156 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2019-09-07 10:13:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-07 10:13:24,158 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:24,158 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:24,158 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:24,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:24,159 INFO L82 PathProgramCache]: Analyzing trace with hash 346386898, now seen corresponding path program 6 times [2019-09-07 10:13:24,159 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:24,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:24,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:24,160 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:13:24,160 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:24,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:24,318 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-09-07 10:13:24,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:24,318 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:13:24,338 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:13:28,360 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-09-07 10:13:28,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:13:28,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 10:13:28,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:13:28,407 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:28,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 10:13:28,408 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 10:13:28,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 10:13:28,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:13:28,409 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 10 states. [2019-09-07 10:13:28,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:28,597 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2019-09-07 10:13:28,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 10:13:28,598 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2019-09-07 10:13:28,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:28,599 INFO L225 Difference]: With dead ends: 172 [2019-09-07 10:13:28,599 INFO L226 Difference]: Without dead ends: 97 [2019-09-07 10:13:28,600 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 10:13:28,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-07 10:13:28,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-09-07 10:13:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-07 10:13:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2019-09-07 10:13:28,609 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 83 [2019-09-07 10:13:28,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:28,610 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2019-09-07 10:13:28,610 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 10:13:28,610 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2019-09-07 10:13:28,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-09-07 10:13:28,613 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:28,613 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:28,613 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:28,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:28,614 INFO L82 PathProgramCache]: Analyzing trace with hash -698280774, now seen corresponding path program 7 times [2019-09-07 10:13:28,617 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:28,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:28,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:28,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:13:28,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:28,783 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2019-09-07 10:13:28,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:28,784 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:13:28,799 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:13:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:28,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 10:13:28,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 10:13:28,894 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:28,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 10:13:28,894 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 10:13:28,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 10:13:28,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:13:28,895 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 11 states. [2019-09-07 10:13:29,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:29,106 INFO L93 Difference]: Finished difference Result 189 states and 215 transitions. [2019-09-07 10:13:29,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 10:13:29,107 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 92 [2019-09-07 10:13:29,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:29,108 INFO L225 Difference]: With dead ends: 189 [2019-09-07 10:13:29,108 INFO L226 Difference]: Without dead ends: 106 [2019-09-07 10:13:29,109 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 10:13:29,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-07 10:13:29,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-09-07 10:13:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-07 10:13:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2019-09-07 10:13:29,119 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 92 [2019-09-07 10:13:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:29,119 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2019-09-07 10:13:29,119 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 10:13:29,119 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2019-09-07 10:13:29,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-07 10:13:29,121 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:29,121 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:29,121 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:29,122 INFO L82 PathProgramCache]: Analyzing trace with hash -732453166, now seen corresponding path program 8 times [2019-09-07 10:13:29,122 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:29,122 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:29,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:29,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:13:29,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-09-07 10:13:29,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:29,302 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:13:29,313 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:13:29,373 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:13:29,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:13:29,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 10:13:29,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-09-07 10:13:29,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:29,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 10:13:29,415 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 10:13:29,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 10:13:29,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:13:29,416 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand 12 states. [2019-09-07 10:13:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:29,647 INFO L93 Difference]: Finished difference Result 206 states and 232 transitions. [2019-09-07 10:13:29,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 10:13:29,648 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2019-09-07 10:13:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:29,649 INFO L225 Difference]: With dead ends: 206 [2019-09-07 10:13:29,649 INFO L226 Difference]: Without dead ends: 115 [2019-09-07 10:13:29,650 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 10:13:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-07 10:13:29,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2019-09-07 10:13:29,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-09-07 10:13:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2019-09-07 10:13:29,659 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 101 [2019-09-07 10:13:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:29,659 INFO L475 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2019-09-07 10:13:29,660 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 10:13:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2019-09-07 10:13:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-09-07 10:13:29,661 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:29,661 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:29,662 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:29,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:29,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1838619322, now seen corresponding path program 9 times [2019-09-07 10:13:29,662 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:29,662 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:29,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:29,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:13:29,664 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:29,800 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-09-07 10:13:29,800 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:29,800 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:13:29,829 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:13:57,377 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-07 10:13:57,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:13:57,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 10:13:57,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-09-07 10:13:57,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:57,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2019-09-07 10:13:57,475 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 10:13:57,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 10:13:57,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:13:57,476 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand 14 states. [2019-09-07 10:13:57,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:57,764 INFO L93 Difference]: Finished difference Result 223 states and 249 transitions. [2019-09-07 10:13:57,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 10:13:57,765 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 110 [2019-09-07 10:13:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:57,766 INFO L225 Difference]: With dead ends: 223 [2019-09-07 10:13:57,766 INFO L226 Difference]: Without dead ends: 124 [2019-09-07 10:13:57,767 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:13:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-09-07 10:13:57,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2019-09-07 10:13:57,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-07 10:13:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2019-09-07 10:13:57,777 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 110 [2019-09-07 10:13:57,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:57,778 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2019-09-07 10:13:57,778 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 10:13:57,778 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2019-09-07 10:13:57,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-07 10:13:57,780 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:57,780 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:57,781 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:57,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1132012590, now seen corresponding path program 10 times [2019-09-07 10:13:57,781 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:57,781 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:57,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:57,782 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:13:57,783 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-09-07 10:13:58,017 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:58,017 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:13:58,051 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:13:58,122 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:13:58,122 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:13:58,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 10:13:58,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:13:58,161 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-09-07 10:13:58,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:13:58,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-07 10:13:58,179 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 10:13:58,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 10:13:58,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:13:58,180 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 14 states. [2019-09-07 10:13:58,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:13:58,425 INFO L93 Difference]: Finished difference Result 240 states and 266 transitions. [2019-09-07 10:13:58,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 10:13:58,427 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 119 [2019-09-07 10:13:58,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:13:58,428 INFO L225 Difference]: With dead ends: 240 [2019-09-07 10:13:58,428 INFO L226 Difference]: Without dead ends: 133 [2019-09-07 10:13:58,429 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-09-07 10:13:58,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-09-07 10:13:58,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2019-09-07 10:13:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-09-07 10:13:58,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2019-09-07 10:13:58,445 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 119 [2019-09-07 10:13:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:13:58,445 INFO L475 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2019-09-07 10:13:58,445 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 10:13:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2019-09-07 10:13:58,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-07 10:13:58,448 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:13:58,448 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:13:58,448 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:13:58,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:13:58,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1513332922, now seen corresponding path program 11 times [2019-09-07 10:13:58,449 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:13:58,449 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:13:58,450 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:58,450 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:13:58,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:13:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:13:58,655 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2019-09-07 10:13:58,655 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:13:58,656 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) [2019-09-07 10:13:58,679 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:14:50,365 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-07 10:14:50,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:14:50,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 10:14:50,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:14:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2019-09-07 10:14:50,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:14:50,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 10:14:50,500 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 10:14:50,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 10:14:50,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:14:50,501 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand 15 states. [2019-09-07 10:14:50,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:14:50,797 INFO L93 Difference]: Finished difference Result 257 states and 283 transitions. [2019-09-07 10:14:50,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 10:14:50,798 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 128 [2019-09-07 10:14:50,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:14:50,799 INFO L225 Difference]: With dead ends: 257 [2019-09-07 10:14:50,799 INFO L226 Difference]: Without dead ends: 142 [2019-09-07 10:14:50,800 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 10:14:50,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-09-07 10:14:50,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2019-09-07 10:14:50,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-09-07 10:14:50,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 151 transitions. [2019-09-07 10:14:50,809 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 151 transitions. Word has length 128 [2019-09-07 10:14:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:14:50,809 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 151 transitions. [2019-09-07 10:14:50,809 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 10:14:50,809 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 151 transitions. [2019-09-07 10:14:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-07 10:14:50,811 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:14:50,811 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:14:50,811 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:14:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:14:50,812 INFO L82 PathProgramCache]: Analyzing trace with hash 892014802, now seen corresponding path program 12 times [2019-09-07 10:14:50,812 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:14:50,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:14:50,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:14:50,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:14:50,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:14:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:14:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2019-09-07 10:14:51,029 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:14:51,029 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:14:51,046 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:15:30,451 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 10:15:30,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:15:30,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 10:15:30,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:15:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2019-09-07 10:15:30,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:15:30,544 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 10:15:30,545 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 10:15:30,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 10:15:30,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:15:30,546 INFO L87 Difference]: Start difference. First operand 142 states and 151 transitions. Second operand 16 states. [2019-09-07 10:15:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:15:30,822 INFO L93 Difference]: Finished difference Result 274 states and 300 transitions. [2019-09-07 10:15:30,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 10:15:30,823 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 137 [2019-09-07 10:15:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:15:30,824 INFO L225 Difference]: With dead ends: 274 [2019-09-07 10:15:30,824 INFO L226 Difference]: Without dead ends: 151 [2019-09-07 10:15:30,825 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 10:15:30,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-09-07 10:15:30,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2019-09-07 10:15:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-07 10:15:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 160 transitions. [2019-09-07 10:15:30,832 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 160 transitions. Word has length 137 [2019-09-07 10:15:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:15:30,833 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 160 transitions. [2019-09-07 10:15:30,833 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 10:15:30,833 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 160 transitions. [2019-09-07 10:15:30,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-09-07 10:15:30,834 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:15:30,835 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:15:30,835 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:15:30,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:15:30,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1312905542, now seen corresponding path program 13 times [2019-09-07 10:15:30,835 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:15:30,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:15:30,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:15:30,838 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:15:30,838 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:15:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:15:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2019-09-07 10:15:31,068 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:15:31,068 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:15:31,079 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:15:31,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:15:31,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 10:15:31,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:15:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2019-09-07 10:15:31,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:15:31,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-07 10:15:31,210 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 10:15:31,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 10:15:31,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:15:31,211 INFO L87 Difference]: Start difference. First operand 151 states and 160 transitions. Second operand 17 states. [2019-09-07 10:15:31,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:15:31,496 INFO L93 Difference]: Finished difference Result 291 states and 317 transitions. [2019-09-07 10:15:31,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 10:15:31,499 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 146 [2019-09-07 10:15:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:15:31,500 INFO L225 Difference]: With dead ends: 291 [2019-09-07 10:15:31,500 INFO L226 Difference]: Without dead ends: 160 [2019-09-07 10:15:31,501 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 10:15:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-09-07 10:15:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2019-09-07 10:15:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-09-07 10:15:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2019-09-07 10:15:31,509 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 146 [2019-09-07 10:15:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:15:31,509 INFO L475 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2019-09-07 10:15:31,509 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 10:15:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2019-09-07 10:15:31,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-09-07 10:15:31,511 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:15:31,511 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:15:31,512 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:15:31,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:15:31,512 INFO L82 PathProgramCache]: Analyzing trace with hash 305939922, now seen corresponding path program 14 times [2019-09-07 10:15:31,512 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:15:31,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:15:31,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:15:31,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:15:31,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:15:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:15:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-09-07 10:15:31,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:15:31,768 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:15:31,783 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:15:31,893 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:15:31,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:15:31,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 10:15:31,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:15:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2019-09-07 10:15:31,949 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:15:31,950 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-07 10:15:31,951 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-07 10:15:31,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-07 10:15:31,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:15:31,961 INFO L87 Difference]: Start difference. First operand 160 states and 169 transitions. Second operand 18 states. [2019-09-07 10:15:32,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:15:32,282 INFO L93 Difference]: Finished difference Result 308 states and 334 transitions. [2019-09-07 10:15:32,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 10:15:32,283 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 155 [2019-09-07 10:15:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:15:32,284 INFO L225 Difference]: With dead ends: 308 [2019-09-07 10:15:32,284 INFO L226 Difference]: Without dead ends: 169 [2019-09-07 10:15:32,287 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-09-07 10:15:32,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-09-07 10:15:32,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2019-09-07 10:15:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-09-07 10:15:32,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 178 transitions. [2019-09-07 10:15:32,297 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 178 transitions. Word has length 155 [2019-09-07 10:15:32,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:15:32,297 INFO L475 AbstractCegarLoop]: Abstraction has 169 states and 178 transitions. [2019-09-07 10:15:32,297 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-07 10:15:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 178 transitions. [2019-09-07 10:15:32,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-09-07 10:15:32,299 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:15:32,299 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:15:32,299 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:15:32,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:15:32,300 INFO L82 PathProgramCache]: Analyzing trace with hash 2109746362, now seen corresponding path program 15 times [2019-09-07 10:15:32,300 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:15:32,300 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:15:32,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:15:32,301 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:15:32,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:15:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:15:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2019-09-07 10:15:32,569 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:15:32,569 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:15:32,584 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:16:35,983 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-07 10:16:35,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:16:36,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 10:16:36,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:16:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 30 proven. 120 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2019-09-07 10:16:36,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:16:36,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2019-09-07 10:16:36,123 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 10:16:36,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 10:16:36,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:16:36,124 INFO L87 Difference]: Start difference. First operand 169 states and 178 transitions. Second operand 20 states. [2019-09-07 10:16:36,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:16:36,407 INFO L93 Difference]: Finished difference Result 325 states and 351 transitions. [2019-09-07 10:16:36,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 10:16:36,408 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 164 [2019-09-07 10:16:36,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:16:36,409 INFO L225 Difference]: With dead ends: 325 [2019-09-07 10:16:36,409 INFO L226 Difference]: Without dead ends: 178 [2019-09-07 10:16:36,410 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:16:36,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-09-07 10:16:36,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2019-09-07 10:16:36,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-09-07 10:16:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 187 transitions. [2019-09-07 10:16:36,418 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 187 transitions. Word has length 164 [2019-09-07 10:16:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:16:36,418 INFO L475 AbstractCegarLoop]: Abstraction has 178 states and 187 transitions. [2019-09-07 10:16:36,418 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 10:16:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 187 transitions. [2019-09-07 10:16:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-09-07 10:16:36,420 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:16:36,420 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:16:36,421 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:16:36,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:16:36,421 INFO L82 PathProgramCache]: Analyzing trace with hash 330463954, now seen corresponding path program 16 times [2019-09-07 10:16:36,421 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:16:36,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:16:36,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:16:36,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:16:36,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:16:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:16:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2019-09-07 10:16:36,764 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:16:36,764 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:16:36,787 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:16:36,887 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:16:36,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:16:36,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 10:16:36,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:16:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2019-09-07 10:16:36,933 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:16:36,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 10:16:36,935 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 10:16:36,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 10:16:36,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:16:36,936 INFO L87 Difference]: Start difference. First operand 178 states and 187 transitions. Second operand 20 states. [2019-09-07 10:16:37,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:16:37,322 INFO L93 Difference]: Finished difference Result 342 states and 368 transitions. [2019-09-07 10:16:37,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 10:16:37,323 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 173 [2019-09-07 10:16:37,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:16:37,324 INFO L225 Difference]: With dead ends: 342 [2019-09-07 10:16:37,324 INFO L226 Difference]: Without dead ends: 187 [2019-09-07 10:16:37,325 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 10:16:37,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-09-07 10:16:37,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2019-09-07 10:16:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-09-07 10:16:37,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 196 transitions. [2019-09-07 10:16:37,334 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 196 transitions. Word has length 173 [2019-09-07 10:16:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:16:37,334 INFO L475 AbstractCegarLoop]: Abstraction has 187 states and 196 transitions. [2019-09-07 10:16:37,335 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 10:16:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 196 transitions. [2019-09-07 10:16:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-09-07 10:16:37,336 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:16:37,336 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:16:37,336 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:16:37,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:16:37,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1002451642, now seen corresponding path program 17 times [2019-09-07 10:16:37,337 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:16:37,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:16:37,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:16:37,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:16:37,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:16:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:16:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1224 trivial. 0 not checked. [2019-09-07 10:16:37,692 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:16:37,692 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-09-07 10:16:37,713 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:18:06,389 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-07 10:18:06,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:18:06,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 10:18:06,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:18:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1224 trivial. 0 not checked. [2019-09-07 10:18:06,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:18:06,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-07 10:18:06,540 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 10:18:06,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 10:18:06,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:18:06,540 INFO L87 Difference]: Start difference. First operand 187 states and 196 transitions. Second operand 21 states. [2019-09-07 10:18:06,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:18:06,923 INFO L93 Difference]: Finished difference Result 359 states and 385 transitions. [2019-09-07 10:18:06,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 10:18:06,924 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 182 [2019-09-07 10:18:06,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:18:06,925 INFO L225 Difference]: With dead ends: 359 [2019-09-07 10:18:06,925 INFO L226 Difference]: Without dead ends: 196 [2019-09-07 10:18:06,927 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-09-07 10:18:06,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-09-07 10:18:06,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2019-09-07 10:18:06,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-09-07 10:18:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 205 transitions. [2019-09-07 10:18:06,960 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 205 transitions. Word has length 182 [2019-09-07 10:18:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:18:06,961 INFO L475 AbstractCegarLoop]: Abstraction has 196 states and 205 transitions. [2019-09-07 10:18:06,961 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 10:18:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 205 transitions. [2019-09-07 10:18:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-09-07 10:18:06,962 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:18:06,963 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:18:06,963 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:18:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:18:06,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1703260114, now seen corresponding path program 18 times [2019-09-07 10:18:06,963 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:18:06,963 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:18:06,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:18:06,964 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:18:06,964 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:18:07,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:18:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2019-09-07 10:18:07,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:18:07,366 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) [2019-09-07 10:18:07,389 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:19:23,652 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-07 10:19:23,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:19:23,694 INFO L256 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 10:19:23,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:19:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2019-09-07 10:19:23,773 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:19:23,774 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-07 10:19:23,774 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 10:19:23,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 10:19:23,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 10:19:23,775 INFO L87 Difference]: Start difference. First operand 196 states and 205 transitions. Second operand 22 states. [2019-09-07 10:19:24,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:19:24,245 INFO L93 Difference]: Finished difference Result 376 states and 402 transitions. [2019-09-07 10:19:24,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 10:19:24,245 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 191 [2019-09-07 10:19:24,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:19:24,248 INFO L225 Difference]: With dead ends: 376 [2019-09-07 10:19:24,248 INFO L226 Difference]: Without dead ends: 205 [2019-09-07 10:19:24,250 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 10:19:24,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-09-07 10:19:24,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2019-09-07 10:19:24,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-09-07 10:19:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 214 transitions. [2019-09-07 10:19:24,262 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 214 transitions. Word has length 191 [2019-09-07 10:19:24,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:19:24,262 INFO L475 AbstractCegarLoop]: Abstraction has 205 states and 214 transitions. [2019-09-07 10:19:24,262 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 10:19:24,262 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 214 transitions. [2019-09-07 10:19:24,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-09-07 10:19:24,264 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:19:24,265 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:19:24,265 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:19:24,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:19:24,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1564915898, now seen corresponding path program 19 times [2019-09-07 10:19:24,266 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:19:24,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:19:24,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:19:24,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:19:24,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:19:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:19:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2019-09-07 10:19:24,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:19:24,686 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 [2019-09-07 10:19:24,698 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:19:24,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:19:24,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 10:19:24,829 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:19:24,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2019-09-07 10:19:24,889 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:19:24,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 10:19:24,891 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 10:19:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 10:19:24,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:19:24,892 INFO L87 Difference]: Start difference. First operand 205 states and 214 transitions. Second operand 23 states. [2019-09-07 10:19:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:19:25,244 INFO L93 Difference]: Finished difference Result 393 states and 419 transitions. [2019-09-07 10:19:25,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 10:19:25,246 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2019-09-07 10:19:25,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:19:25,247 INFO L225 Difference]: With dead ends: 393 [2019-09-07 10:19:25,247 INFO L226 Difference]: Without dead ends: 214 [2019-09-07 10:19:25,248 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 10:19:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-09-07 10:19:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2019-09-07 10:19:25,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-09-07 10:19:25,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 223 transitions. [2019-09-07 10:19:25,257 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 223 transitions. Word has length 200 [2019-09-07 10:19:25,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:19:25,259 INFO L475 AbstractCegarLoop]: Abstraction has 214 states and 223 transitions. [2019-09-07 10:19:25,259 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 10:19:25,259 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 223 transitions. [2019-09-07 10:19:25,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-09-07 10:19:25,260 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:19:25,260 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:19:25,260 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:19:25,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:19:25,261 INFO L82 PathProgramCache]: Analyzing trace with hash 531490002, now seen corresponding path program 20 times [2019-09-07 10:19:25,261 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:19:25,261 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:19:25,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:19:25,262 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:19:25,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:19:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:19:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2019-09-07 10:19:25,691 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:19:25,691 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 10:19:25,706 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:19:25,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:19:25,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:19:25,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 796 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-07 10:19:25,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:19:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2019-09-07 10:19:25,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:19:25,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-09-07 10:19:25,889 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 10:19:25,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 10:19:25,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:19:25,890 INFO L87 Difference]: Start difference. First operand 214 states and 223 transitions. Second operand 24 states. [2019-09-07 10:19:26,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:19:26,395 INFO L93 Difference]: Finished difference Result 410 states and 436 transitions. [2019-09-07 10:19:26,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 10:19:26,400 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 209 [2019-09-07 10:19:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:19:26,402 INFO L225 Difference]: With dead ends: 410 [2019-09-07 10:19:26,402 INFO L226 Difference]: Without dead ends: 223 [2019-09-07 10:19:26,404 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-09-07 10:19:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-09-07 10:19:26,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2019-09-07 10:19:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-09-07 10:19:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 232 transitions. [2019-09-07 10:19:26,416 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 232 transitions. Word has length 209 [2019-09-07 10:19:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:19:26,417 INFO L475 AbstractCegarLoop]: Abstraction has 223 states and 232 transitions. [2019-09-07 10:19:26,417 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 10:19:26,417 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 232 transitions. [2019-09-07 10:19:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-09-07 10:19:26,419 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:19:26,419 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:19:26,420 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:19:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:19:26,420 INFO L82 PathProgramCache]: Analyzing trace with hash -941900102, now seen corresponding path program 21 times [2019-09-07 10:19:26,420 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:19:26,421 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:19:26,421 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:19:26,422 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:19:26,422 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:19:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:19:26,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2019-09-07 10:19:26,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:19:26,894 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 [2019-09-07 10:19:26,909 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:21:05,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 10:21:05,429 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:21:05,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-07 10:21:05,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:21:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2019-09-07 10:21:05,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:21:05,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-07 10:21:05,590 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 10:21:05,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 10:21:05,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:21:05,590 INFO L87 Difference]: Start difference. First operand 223 states and 232 transitions. Second operand 25 states. [2019-09-07 10:21:06,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:21:06,044 INFO L93 Difference]: Finished difference Result 427 states and 453 transitions. [2019-09-07 10:21:06,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 10:21:06,044 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 218 [2019-09-07 10:21:06,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:21:06,045 INFO L225 Difference]: With dead ends: 427 [2019-09-07 10:21:06,046 INFO L226 Difference]: Without dead ends: 232 [2019-09-07 10:21:06,047 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2019-09-07 10:21:06,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-09-07 10:21:06,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2019-09-07 10:21:06,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-09-07 10:21:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 241 transitions. [2019-09-07 10:21:06,055 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 241 transitions. Word has length 218 [2019-09-07 10:21:06,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:21:06,056 INFO L475 AbstractCegarLoop]: Abstraction has 232 states and 241 transitions. [2019-09-07 10:21:06,056 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 10:21:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 241 transitions. [2019-09-07 10:21:06,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-09-07 10:21:06,057 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:21:06,057 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:21:06,058 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:21:06,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:21:06,058 INFO L82 PathProgramCache]: Analyzing trace with hash -970778158, now seen corresponding path program 22 times [2019-09-07 10:21:06,058 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:21:06,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:21:06,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:21:06,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:21:06,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:21:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:21:06,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2019-09-07 10:21:06,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:21:06,476 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:21:06,487 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:21:06,628 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:21:06,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:21:06,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 10:21:06,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:21:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2019-09-07 10:21:06,710 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:21:06,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-07 10:21:06,711 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 10:21:06,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 10:21:06,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:21:06,712 INFO L87 Difference]: Start difference. First operand 232 states and 241 transitions. Second operand 26 states. [2019-09-07 10:21:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:21:07,357 INFO L93 Difference]: Finished difference Result 444 states and 470 transitions. [2019-09-07 10:21:07,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 10:21:07,357 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 227 [2019-09-07 10:21:07,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:21:07,359 INFO L225 Difference]: With dead ends: 444 [2019-09-07 10:21:07,360 INFO L226 Difference]: Without dead ends: 241 [2019-09-07 10:21:07,361 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-09-07 10:21:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-09-07 10:21:07,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2019-09-07 10:21:07,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2019-09-07 10:21:07,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 250 transitions. [2019-09-07 10:21:07,373 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 250 transitions. Word has length 227 [2019-09-07 10:21:07,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:21:07,373 INFO L475 AbstractCegarLoop]: Abstraction has 241 states and 250 transitions. [2019-09-07 10:21:07,373 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 10:21:07,373 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 250 transitions. [2019-09-07 10:21:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-09-07 10:21:07,375 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:21:07,375 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:21:07,376 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:21:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:21:07,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1426539706, now seen corresponding path program 23 times [2019-09-07 10:21:07,376 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:21:07,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:21:07,377 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:21:07,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:21:07,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:21:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:21:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2019-09-07 10:21:07,818 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:21:07,818 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:21:07,829 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 10:23:12,076 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-09-07 10:23:12,076 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:23:12,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 10:23:12,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:23:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2019-09-07 10:23:12,266 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:23:12,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 10:23:12,268 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 10:23:12,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 10:23:12,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 10:23:12,269 INFO L87 Difference]: Start difference. First operand 241 states and 250 transitions. Second operand 27 states. [2019-09-07 10:23:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:23:12,707 INFO L93 Difference]: Finished difference Result 461 states and 487 transitions. [2019-09-07 10:23:12,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 10:23:12,707 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 236 [2019-09-07 10:23:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:23:12,708 INFO L225 Difference]: With dead ends: 461 [2019-09-07 10:23:12,709 INFO L226 Difference]: Without dead ends: 250 [2019-09-07 10:23:12,710 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 10:23:12,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-09-07 10:23:12,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2019-09-07 10:23:12,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2019-09-07 10:23:12,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 259 transitions. [2019-09-07 10:23:12,719 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 259 transitions. Word has length 236 [2019-09-07 10:23:12,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:23:12,719 INFO L475 AbstractCegarLoop]: Abstraction has 250 states and 259 transitions. [2019-09-07 10:23:12,719 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 10:23:12,719 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 259 transitions. [2019-09-07 10:23:12,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2019-09-07 10:23:12,721 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:23:12,721 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:23:12,721 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:23:12,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:23:12,722 INFO L82 PathProgramCache]: Analyzing trace with hash -925020462, now seen corresponding path program 24 times [2019-09-07 10:23:12,722 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:23:12,722 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:23:12,723 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:23:12,723 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:23:12,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:23:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:23:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2019-09-07 10:23:13,190 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:23:13,190 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:23:13,203 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 10:25:04,810 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-07 10:25:04,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:25:04,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 10:25:04,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:25:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2019-09-07 10:25:04,966 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:25:04,966 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-07 10:25:04,966 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 10:25:04,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 10:25:04,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 10:25:04,970 INFO L87 Difference]: Start difference. First operand 250 states and 259 transitions. Second operand 28 states. [2019-09-07 10:25:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:25:05,452 INFO L93 Difference]: Finished difference Result 478 states and 504 transitions. [2019-09-07 10:25:05,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 10:25:05,453 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 245 [2019-09-07 10:25:05,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:25:05,454 INFO L225 Difference]: With dead ends: 478 [2019-09-07 10:25:05,454 INFO L226 Difference]: Without dead ends: 259 [2019-09-07 10:25:05,455 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 10:25:05,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-09-07 10:25:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2019-09-07 10:25:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-09-07 10:25:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 268 transitions. [2019-09-07 10:25:05,464 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 268 transitions. Word has length 245 [2019-09-07 10:25:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:25:05,464 INFO L475 AbstractCegarLoop]: Abstraction has 259 states and 268 transitions. [2019-09-07 10:25:05,465 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 10:25:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 268 transitions. [2019-09-07 10:25:05,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-09-07 10:25:05,466 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:25:05,466 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:25:05,467 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:25:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:25:05,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1381059258, now seen corresponding path program 25 times [2019-09-07 10:25:05,467 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:25:05,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:25:05,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:25:05,468 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:25:05,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:25:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:25:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2925 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2600 trivial. 0 not checked. [2019-09-07 10:25:05,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:25:05,953 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:25:05,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:25:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:25:06,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 10:25:06,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:25:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2925 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2600 trivial. 0 not checked. [2019-09-07 10:25:06,172 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:25:06,172 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-09-07 10:25:06,173 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-07 10:25:06,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-07 10:25:06,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:25:06,174 INFO L87 Difference]: Start difference. First operand 259 states and 268 transitions. Second operand 29 states. [2019-09-07 10:25:06,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:25:06,734 INFO L93 Difference]: Finished difference Result 495 states and 521 transitions. [2019-09-07 10:25:06,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 10:25:06,735 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 254 [2019-09-07 10:25:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:25:06,736 INFO L225 Difference]: With dead ends: 495 [2019-09-07 10:25:06,737 INFO L226 Difference]: Without dead ends: 268 [2019-09-07 10:25:06,738 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-09-07 10:25:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2019-09-07 10:25:06,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2019-09-07 10:25:06,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-09-07 10:25:06,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 277 transitions. [2019-09-07 10:25:06,752 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 277 transitions. Word has length 254 [2019-09-07 10:25:06,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:25:06,752 INFO L475 AbstractCegarLoop]: Abstraction has 268 states and 277 transitions. [2019-09-07 10:25:06,753 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-07 10:25:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 277 transitions. [2019-09-07 10:25:06,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2019-09-07 10:25:06,755 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:25:06,756 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:25:06,756 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:25:06,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:25:06,757 INFO L82 PathProgramCache]: Analyzing trace with hash 64259026, now seen corresponding path program 26 times [2019-09-07 10:25:06,757 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:25:06,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:25:06,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:25:06,758 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 10:25:06,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:25:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:25:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3159 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2808 trivial. 0 not checked. [2019-09-07 10:25:07,348 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:25:07,348 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:25:07,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 10:25:07,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 10:25:07,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:25:07,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 1012 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 10:25:07,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:25:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3159 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2808 trivial. 0 not checked. [2019-09-07 10:25:07,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:25:07,595 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-09-07 10:25:07,596 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 10:25:07,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 10:25:07,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 10:25:07,597 INFO L87 Difference]: Start difference. First operand 268 states and 277 transitions. Second operand 30 states. [2019-09-07 10:25:08,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:25:08,105 INFO L93 Difference]: Finished difference Result 512 states and 538 transitions. [2019-09-07 10:25:08,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 10:25:08,109 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 263 [2019-09-07 10:25:08,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:25:08,112 INFO L225 Difference]: With dead ends: 512 [2019-09-07 10:25:08,112 INFO L226 Difference]: Without dead ends: 277 [2019-09-07 10:25:08,113 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 10:25:08,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2019-09-07 10:25:08,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2019-09-07 10:25:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2019-09-07 10:25:08,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 286 transitions. [2019-09-07 10:25:08,122 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 286 transitions. Word has length 263 [2019-09-07 10:25:08,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:25:08,122 INFO L475 AbstractCegarLoop]: Abstraction has 277 states and 286 transitions. [2019-09-07 10:25:08,122 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 10:25:08,122 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 286 transitions. [2019-09-07 10:25:08,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2019-09-07 10:25:08,124 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:25:08,124 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:25:08,124 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:25:08,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:25:08,125 INFO L82 PathProgramCache]: Analyzing trace with hash 21090490, now seen corresponding path program 27 times [2019-09-07 10:25:08,125 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:25:08,125 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:25:08,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:25:08,126 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:25:08,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:25:08,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:25:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3402 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3024 trivial. 0 not checked. [2019-09-07 10:25:08,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:25:08,656 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:25:08,667 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 10:27:20,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-07 10:27:20,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:27:20,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-07 10:27:20,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:27:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3402 backedges. 27 proven. 378 refuted. 0 times theorem prover too weak. 2997 trivial. 0 not checked. [2019-09-07 10:27:20,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:27:20,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 32 [2019-09-07 10:27:20,249 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 10:27:20,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 10:27:20,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:27:20,250 INFO L87 Difference]: Start difference. First operand 277 states and 286 transitions. Second operand 32 states. [2019-09-07 10:27:20,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:27:20,993 INFO L93 Difference]: Finished difference Result 529 states and 555 transitions. [2019-09-07 10:27:20,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 10:27:20,994 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 272 [2019-09-07 10:27:20,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:27:20,996 INFO L225 Difference]: With dead ends: 529 [2019-09-07 10:27:20,996 INFO L226 Difference]: Without dead ends: 286 [2019-09-07 10:27:20,998 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:27:20,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-09-07 10:27:21,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2019-09-07 10:27:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2019-09-07 10:27:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 295 transitions. [2019-09-07 10:27:21,008 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 295 transitions. Word has length 272 [2019-09-07 10:27:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:27:21,009 INFO L475 AbstractCegarLoop]: Abstraction has 286 states and 295 transitions. [2019-09-07 10:27:21,009 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 10:27:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 295 transitions. [2019-09-07 10:27:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-09-07 10:27:21,011 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:27:21,011 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:27:21,011 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:27:21,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:27:21,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1057011922, now seen corresponding path program 28 times [2019-09-07 10:27:21,012 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:27:21,012 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:27:21,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:27:21,013 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:27:21,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:27:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:27:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3654 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3248 trivial. 0 not checked. [2019-09-07 10:27:21,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:27:21,568 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:27:21,579 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 10:27:21,752 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 10:27:21,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 10:27:21,755 INFO L256 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 10:27:21,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 10:27:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3654 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3248 trivial. 0 not checked. [2019-09-07 10:27:21,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 10:27:21,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-09-07 10:27:21,843 INFO L454 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-09-07 10:27:21,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-09-07 10:27:21,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:27:21,844 INFO L87 Difference]: Start difference. First operand 286 states and 295 transitions. Second operand 32 states. [2019-09-07 10:27:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 10:27:22,379 INFO L93 Difference]: Finished difference Result 546 states and 572 transitions. [2019-09-07 10:27:22,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 10:27:22,380 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 281 [2019-09-07 10:27:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 10:27:22,381 INFO L225 Difference]: With dead ends: 546 [2019-09-07 10:27:22,381 INFO L226 Difference]: Without dead ends: 295 [2019-09-07 10:27:22,382 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-09-07 10:27:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2019-09-07 10:27:22,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2019-09-07 10:27:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2019-09-07 10:27:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 304 transitions. [2019-09-07 10:27:22,393 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 304 transitions. Word has length 281 [2019-09-07 10:27:22,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 10:27:22,393 INFO L475 AbstractCegarLoop]: Abstraction has 295 states and 304 transitions. [2019-09-07 10:27:22,393 INFO L476 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-09-07 10:27:22,393 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 304 transitions. [2019-09-07 10:27:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2019-09-07 10:27:22,395 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 10:27:22,396 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 10:27:22,396 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 10:27:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 10:27:22,396 INFO L82 PathProgramCache]: Analyzing trace with hash 392222394, now seen corresponding path program 29 times [2019-09-07 10:27:22,396 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 10:27:22,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 10:27:22,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:27:22,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 10:27:22,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 10:27:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 10:27:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3915 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2019-09-07 10:27:23,015 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 10:27:23,015 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 10:27:23,026 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1