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_copy8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:44:38,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:44:38,148 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:44:38,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 09:44:38,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 09:44:38,161 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 09:44:38,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 09:44:38,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 09:44:38,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 09:44:38,167 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 09:44:38,168 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 09:44:38,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 09:44:38,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:44:38,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:44:38,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:44:38,173 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:44:38,174 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:44:38,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:44:38,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:44:38,179 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:44:38,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:44:38,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:44:38,183 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:44:38,184 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:44:38,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 09:44:38,189 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 09:44:38,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 09:44:38,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 09:44:38,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 09:44:38,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 09:44:38,193 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 09:44:38,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 09:44:38,194 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 09:44:38,194 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:44:38,195 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:44:38,196 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:44:38,197 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 09:44:38,212 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:44:38,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:44:38,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:44:38,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:44:38,214 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:44:38,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:44:38,214 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:44:38,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:44:38,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:44:38,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:44:38,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:44:38,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:44:38,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:44:38,215 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:44:38,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:44:38,216 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:44:38,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:44:38,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:44:38,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:44:38,217 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:44:38,217 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:44:38,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:44:38,217 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:44:38,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:44:38,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:44:38,218 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:44:38,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:44:38,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:44:38,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:44:38,252 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:44:38,269 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:44:38,274 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:44:38,275 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:44:38,276 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:44:38,277 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2019-09-07 09:44:38,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c384dc9b/a99aa719a5eb461e804ed89b00c232d1/FLAG356b75038 [2019-09-07 09:44:38,849 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:44:38,854 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy8_ground-2.i [2019-09-07 09:44:38,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c384dc9b/a99aa719a5eb461e804ed89b00c232d1/FLAG356b75038 [2019-09-07 09:44:39,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c384dc9b/a99aa719a5eb461e804ed89b00c232d1 [2019-09-07 09:44:39,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:44:39,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:44:39,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:44:39,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:44:39,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:44:39,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:44:39" (1/1) ... [2019-09-07 09:44:39,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4083eb64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:39, skipping insertion in model container [2019-09-07 09:44:39,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:44:39" (1/1) ... [2019-09-07 09:44:39,289 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:44:39,307 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:44:39,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:44:39,607 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:44:39,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:44:39,787 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:44:39,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:39 WrapperNode [2019-09-07 09:44:39,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:44:39,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:44:39,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:44:39,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:44:39,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:39" (1/1) ... [2019-09-07 09:44:39,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:39" (1/1) ... [2019-09-07 09:44:39,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:39" (1/1) ... [2019-09-07 09:44:39,827 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:39" (1/1) ... [2019-09-07 09:44:39,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:39" (1/1) ... [2019-09-07 09:44:39,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:39" (1/1) ... [2019-09-07 09:44:39,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:39" (1/1) ... [2019-09-07 09:44:39,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:44:39,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:44:39,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:44:39,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:44:39,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:39" (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 09:44:39,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:44:39,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:44:39,926 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:44:39,926 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:44:39,926 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:44:39,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:44:39,927 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 09:44:39,927 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:44:39,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:44:39,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:44:39,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:44:39,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:44:39,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:44:39,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:44:40,307 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:44:40,307 INFO L283 CfgBuilder]: Removed 10 assume(true) statements. [2019-09-07 09:44:40,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:44:40 BoogieIcfgContainer [2019-09-07 09:44:40,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:44:40,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:44:40,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:44:40,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:44:40,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:44:39" (1/3) ... [2019-09-07 09:44:40,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb7a7a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:44:40, skipping insertion in model container [2019-09-07 09:44:40,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:44:39" (2/3) ... [2019-09-07 09:44:40,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb7a7a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:44:40, skipping insertion in model container [2019-09-07 09:44:40,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:44:40" (3/3) ... [2019-09-07 09:44:40,322 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-2.i [2019-09-07 09:44:40,344 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:44:40,363 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:44:40,411 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:44:40,454 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:44:40,454 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:44:40,455 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:44:40,455 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:44:40,455 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:44:40,455 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:44:40,456 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:44:40,456 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:44:40,456 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:44:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2019-09-07 09:44:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-07 09:44:40,481 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:40,481 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 09:44:40,484 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:40,490 INFO L82 PathProgramCache]: Analyzing trace with hash 661673386, now seen corresponding path program 1 times [2019-09-07 09:44:40,492 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:40,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:40,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:40,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:40,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:40,654 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 09:44:40,657 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:44:40,657 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:44:40,660 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:44:40,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:44:40,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:44:40,673 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 2 states. [2019-09-07 09:44:40,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:40,700 INFO L93 Difference]: Finished difference Result 88 states and 127 transitions. [2019-09-07 09:44:40,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:44:40,702 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2019-09-07 09:44:40,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:40,711 INFO L225 Difference]: With dead ends: 88 [2019-09-07 09:44:40,712 INFO L226 Difference]: Without dead ends: 43 [2019-09-07 09:44:40,716 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 09:44:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-07 09:44:40,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-07 09:44:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-07 09:44:40,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-09-07 09:44:40,769 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2019-09-07 09:44:40,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:40,769 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-09-07 09:44:40,770 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:44:40,771 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-09-07 09:44:40,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-07 09:44:40,774 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:40,775 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 09:44:40,776 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:40,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:40,778 INFO L82 PathProgramCache]: Analyzing trace with hash 904564754, now seen corresponding path program 1 times [2019-09-07 09:44:40,778 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:40,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:40,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:40,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:40,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:40,888 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 09:44:40,889 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:44:40,889 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:44:40,891 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:44:40,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:44:40,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:44:40,892 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 3 states. [2019-09-07 09:44:40,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:40,939 INFO L93 Difference]: Finished difference Result 80 states and 98 transitions. [2019-09-07 09:44:40,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:44:40,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-09-07 09:44:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:40,942 INFO L225 Difference]: With dead ends: 80 [2019-09-07 09:44:40,943 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 09:44:40,946 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 09:44:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 09:44:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-09-07 09:44:40,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-07 09:44:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-09-07 09:44:40,964 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 29 [2019-09-07 09:44:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:40,965 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-09-07 09:44:40,965 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:44:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-09-07 09:44:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-07 09:44:40,967 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:40,967 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] [2019-09-07 09:44:40,968 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:40,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:40,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1833019696, now seen corresponding path program 1 times [2019-09-07 09:44:40,969 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:40,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:40,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:40,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:40,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:44:41,065 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:44:41,065 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:44:41,066 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:44:41,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:44:41,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:44:41,067 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 3 states. [2019-09-07 09:44:41,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:41,175 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2019-09-07 09:44:41,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:44:41,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2019-09-07 09:44:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:41,177 INFO L225 Difference]: With dead ends: 92 [2019-09-07 09:44:41,177 INFO L226 Difference]: Without dead ends: 60 [2019-09-07 09:44:41,178 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 09:44:41,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-09-07 09:44:41,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2019-09-07 09:44:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-07 09:44:41,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2019-09-07 09:44:41,189 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 31 [2019-09-07 09:44:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:41,189 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2019-09-07 09:44:41,189 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:44:41,190 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2019-09-07 09:44:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-07 09:44:41,194 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:41,194 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:41,195 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:41,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:41,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1518385952, now seen corresponding path program 1 times [2019-09-07 09:44:41,196 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:41,196 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:41,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:41,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:41,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:41,310 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 09:44:41,311 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:41,311 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:41,331 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:41,384 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:44:41,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:41,446 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 09:44:41,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:41,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:44:41,461 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:44:41,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:44:41,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:44:41,463 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 5 states. [2019-09-07 09:44:41,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:41,498 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2019-09-07 09:44:41,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:44:41,499 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2019-09-07 09:44:41,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:41,500 INFO L225 Difference]: With dead ends: 98 [2019-09-07 09:44:41,500 INFO L226 Difference]: Without dead ends: 55 [2019-09-07 09:44:41,501 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 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 09:44:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-07 09:44:41,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-09-07 09:44:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-07 09:44:41,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2019-09-07 09:44:41,527 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 47 [2019-09-07 09:44:41,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:41,527 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2019-09-07 09:44:41,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:44:41,528 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2019-09-07 09:44:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-07 09:44:41,536 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:41,537 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:41,537 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:41,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:41,538 INFO L82 PathProgramCache]: Analyzing trace with hash -946140994, now seen corresponding path program 2 times [2019-09-07 09:44:41,538 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:41,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:41,541 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:41,542 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:41,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-09-07 09:44:41,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:41,647 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:44:41,663 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:44:41,719 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:44:41,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:41,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:44:41,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-09-07 09:44:41,756 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:41,756 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:44:41,757 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:44:41,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:44:41,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:44:41,758 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 5 states. [2019-09-07 09:44:41,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:41,912 INFO L93 Difference]: Finished difference Result 117 states and 141 transitions. [2019-09-07 09:44:41,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:44:41,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2019-09-07 09:44:41,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:41,914 INFO L225 Difference]: With dead ends: 117 [2019-09-07 09:44:41,914 INFO L226 Difference]: Without dead ends: 78 [2019-09-07 09:44:41,915 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 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 09:44:41,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-09-07 09:44:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2019-09-07 09:44:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-07 09:44:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2019-09-07 09:44:41,925 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 49 [2019-09-07 09:44:41,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:41,925 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2019-09-07 09:44:41,925 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:44:41,926 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2019-09-07 09:44:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-07 09:44:41,927 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:41,927 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:41,928 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:41,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:41,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1765015214, now seen corresponding path program 3 times [2019-09-07 09:44:41,928 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:41,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:41,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:41,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:41,930 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-09-07 09:44:42,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:42,054 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:42,076 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:44:42,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:44:42,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:42,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:44:42,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-09-07 09:44:42,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:42,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-07 09:44:42,208 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:44:42,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:44:42,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:44:42,209 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 8 states. [2019-09-07 09:44:42,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:42,481 INFO L93 Difference]: Finished difference Result 156 states and 182 transitions. [2019-09-07 09:44:42,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:44:42,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2019-09-07 09:44:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:42,486 INFO L225 Difference]: With dead ends: 156 [2019-09-07 09:44:42,486 INFO L226 Difference]: Without dead ends: 97 [2019-09-07 09:44:42,489 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:44:42,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-07 09:44:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2019-09-07 09:44:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-09-07 09:44:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2019-09-07 09:44:42,510 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 65 [2019-09-07 09:44:42,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:42,513 INFO L475 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2019-09-07 09:44:42,513 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:44:42,513 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2019-09-07 09:44:42,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-09-07 09:44:42,516 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:42,517 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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 09:44:42,517 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:42,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:42,518 INFO L82 PathProgramCache]: Analyzing trace with hash 2072984252, now seen corresponding path program 4 times [2019-09-07 09:44:42,518 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:42,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:42,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:42,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:42,520 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-09-07 09:44:42,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:42,705 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 09:44:42,721 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:44:42,793 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:44:42,794 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:42,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:44:42,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-09-07 09:44:42,862 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:42,863 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-09-07 09:44:42,863 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:44:42,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:44:42,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:44:42,864 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 10 states. [2019-09-07 09:44:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:43,124 INFO L93 Difference]: Finished difference Result 190 states and 216 transitions. [2019-09-07 09:44:43,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 09:44:43,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2019-09-07 09:44:43,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:43,126 INFO L225 Difference]: With dead ends: 190 [2019-09-07 09:44:43,126 INFO L226 Difference]: Without dead ends: 115 [2019-09-07 09:44:43,127 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:44:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-07 09:44:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2019-09-07 09:44:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-07 09:44:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2019-09-07 09:44:43,137 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 83 [2019-09-07 09:44:43,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:43,138 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2019-09-07 09:44:43,138 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:44:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2019-09-07 09:44:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-07 09:44:43,140 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:43,140 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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 09:44:43,140 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:43,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:43,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1507504310, now seen corresponding path program 5 times [2019-09-07 09:44:43,141 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:43,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:43,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:43,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:43,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-09-07 09:44:43,250 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:43,250 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:43,267 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:45:19,554 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-09-07 09:45:19,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:19,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:45:19,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-09-07 09:45:19,672 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:19,672 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-07 09:45:19,672 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:45:19,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:45:19,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:45:19,673 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand 12 states. [2019-09-07 09:45:19,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:19,965 INFO L93 Difference]: Finished difference Result 224 states and 250 transitions. [2019-09-07 09:45:19,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:45:19,965 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2019-09-07 09:45:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:19,967 INFO L225 Difference]: With dead ends: 224 [2019-09-07 09:45:19,967 INFO L226 Difference]: Without dead ends: 133 [2019-09-07 09:45:19,968 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:45:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-09-07 09:45:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2019-09-07 09:45:19,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-09-07 09:45:19,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2019-09-07 09:45:19,978 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 101 [2019-09-07 09:45:19,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:19,979 INFO L475 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2019-09-07 09:45:19,979 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:45:19,979 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2019-09-07 09:45:19,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-09-07 09:45:19,981 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:19,982 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 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 09:45:19,982 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:19,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:19,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1183915096, now seen corresponding path program 6 times [2019-09-07 09:45:19,982 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:19,983 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:19,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:19,984 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:19,984 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-09-07 09:45:20,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:20,129 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:45:20,150 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:45:25,350 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-09-07 09:45:25,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:25,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:45:25,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:25,458 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-09-07 09:45:25,470 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:25,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-09-07 09:45:25,471 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 09:45:25,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 09:45:25,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:45:25,472 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 14 states. [2019-09-07 09:45:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:25,757 INFO L93 Difference]: Finished difference Result 258 states and 284 transitions. [2019-09-07 09:45:25,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:45:25,758 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 119 [2019-09-07 09:45:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:25,759 INFO L225 Difference]: With dead ends: 258 [2019-09-07 09:45:25,760 INFO L226 Difference]: Without dead ends: 151 [2019-09-07 09:45:25,765 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:45:25,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-09-07 09:45:25,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 142. [2019-09-07 09:45:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2019-09-07 09:45:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 151 transitions. [2019-09-07 09:45:25,780 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 151 transitions. Word has length 119 [2019-09-07 09:45:25,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:25,780 INFO L475 AbstractCegarLoop]: Abstraction has 142 states and 151 transitions. [2019-09-07 09:45:25,780 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 09:45:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 151 transitions. [2019-09-07 09:45:25,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-07 09:45:25,782 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:25,782 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 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 09:45:25,782 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:25,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:25,783 INFO L82 PathProgramCache]: Analyzing trace with hash -780828186, now seen corresponding path program 7 times [2019-09-07 09:45:25,783 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:25,783 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:25,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:25,784 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:25,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:25,956 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 09:45:25,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:25,957 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:45:25,981 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:45:26,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:26,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:45:26,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:26,111 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 09:45:26,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:26,128 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 09:45:26,128 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:45:26,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:45:26,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:45:26,131 INFO L87 Difference]: Start difference. First operand 142 states and 151 transitions. Second operand 10 states. [2019-09-07 09:45:26,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:26,187 INFO L93 Difference]: Finished difference Result 268 states and 286 transitions. [2019-09-07 09:45:26,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 09:45:26,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 137 [2019-09-07 09:45:26,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:26,192 INFO L225 Difference]: With dead ends: 268 [2019-09-07 09:45:26,192 INFO L226 Difference]: Without dead ends: 145 [2019-09-07 09:45:26,195 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 137 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 09:45:26,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-09-07 09:45:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2019-09-07 09:45:26,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-09-07 09:45:26,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 153 transitions. [2019-09-07 09:45:26,220 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 153 transitions. Word has length 137 [2019-09-07 09:45:26,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:26,220 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 153 transitions. [2019-09-07 09:45:26,220 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:45:26,221 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 153 transitions. [2019-09-07 09:45:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-07 09:45:26,228 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:26,229 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 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 09:45:26,229 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:26,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:26,229 INFO L82 PathProgramCache]: Analyzing trace with hash -76417532, now seen corresponding path program 8 times [2019-09-07 09:45:26,229 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:26,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:26,230 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:26,230 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:45:26,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:26,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:26,493 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-09-07 09:45:26,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:26,494 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:45:26,511 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:45:26,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:45:26,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:26,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:45:26,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:26,705 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-09-07 09:45:26,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:26,710 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2019-09-07 09:45:26,710 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 09:45:26,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 09:45:26,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:45:26,711 INFO L87 Difference]: Start difference. First operand 144 states and 153 transitions. Second operand 17 states. [2019-09-07 09:45:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:27,148 INFO L93 Difference]: Finished difference Result 294 states and 320 transitions. [2019-09-07 09:45:27,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 09:45:27,149 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 139 [2019-09-07 09:45:27,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:27,150 INFO L225 Difference]: With dead ends: 294 [2019-09-07 09:45:27,150 INFO L226 Difference]: Without dead ends: 171 [2019-09-07 09:45:27,151 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:45:27,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-09-07 09:45:27,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 162. [2019-09-07 09:45:27,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-09-07 09:45:27,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 171 transitions. [2019-09-07 09:45:27,159 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 171 transitions. Word has length 139 [2019-09-07 09:45:27,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:27,159 INFO L475 AbstractCegarLoop]: Abstraction has 162 states and 171 transitions. [2019-09-07 09:45:27,160 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 09:45:27,160 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 171 transitions. [2019-09-07 09:45:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-09-07 09:45:27,163 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:27,163 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 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 09:45:27,163 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:27,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:27,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1849931630, now seen corresponding path program 9 times [2019-09-07 09:45:27,164 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:27,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:27,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:27,166 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:27,166 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2019-09-07 09:45:27,307 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:27,307 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) [2019-09-07 09:45:27,322 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:45:54,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-09-07 09:45:54,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:54,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-07 09:45:54,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:54,407 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 28 proven. 49 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2019-09-07 09:45:54,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:54,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2019-09-07 09:45:54,428 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:45:54,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:45:54,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:45:54,429 INFO L87 Difference]: Start difference. First operand 162 states and 171 transitions. Second operand 15 states. [2019-09-07 09:45:55,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:55,042 INFO L93 Difference]: Finished difference Result 317 states and 349 transitions. [2019-09-07 09:45:55,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:45:55,043 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 157 [2019-09-07 09:45:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:55,044 INFO L225 Difference]: With dead ends: 317 [2019-09-07 09:45:55,045 INFO L226 Difference]: Without dead ends: 194 [2019-09-07 09:45:55,046 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:45:55,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-09-07 09:45:55,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2019-09-07 09:45:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-09-07 09:45:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 203 transitions. [2019-09-07 09:45:55,055 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 203 transitions. Word has length 157 [2019-09-07 09:45:55,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:55,055 INFO L475 AbstractCegarLoop]: Abstraction has 194 states and 203 transitions. [2019-09-07 09:45:55,055 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:45:55,055 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 203 transitions. [2019-09-07 09:45:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-09-07 09:45:55,058 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:55,058 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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 09:45:55,058 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:55,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash 897565810, now seen corresponding path program 10 times [2019-09-07 09:45:55,059 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:55,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:55,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:55,060 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:55,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:55,213 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-09-07 09:45:55,214 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:55,214 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 09:45:55,242 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 09:45:55,330 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:45:55,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:45:55,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:45:55,337 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:45:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Stream closed [2019-09-07 09:45:55,380 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:45:55,380 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-07 09:45:55,381 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:45:55,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:45:55,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:45:55,382 INFO L87 Difference]: Start difference. First operand 194 states and 203 transitions. Second operand 12 states. [2019-09-07 09:45:55,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:45:55,430 INFO L93 Difference]: Finished difference Result 368 states and 386 transitions. [2019-09-07 09:45:55,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 09:45:55,430 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 189 [2019-09-07 09:45:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:45:55,432 INFO L225 Difference]: With dead ends: 368 [2019-09-07 09:45:55,432 INFO L226 Difference]: Without dead ends: 197 [2019-09-07 09:45:55,433 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 189 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 09:45:55,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-09-07 09:45:55,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-09-07 09:45:55,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-09-07 09:45:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 205 transitions. [2019-09-07 09:45:55,442 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 205 transitions. Word has length 189 [2019-09-07 09:45:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:45:55,442 INFO L475 AbstractCegarLoop]: Abstraction has 196 states and 205 transitions. [2019-09-07 09:45:55,442 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:45:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 205 transitions. [2019-09-07 09:45:55,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-09-07 09:45:55,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:45:55,445 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 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 09:45:55,445 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:45:55,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:45:55,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1093991024, now seen corresponding path program 11 times [2019-09-07 09:45:55,445 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:45:55,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:45:55,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:55,446 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:45:55,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:45:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:45:55,649 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-09-07 09:45:55,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:45:55,650 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:45:55,664 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:47:26,405 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-09-07 09:47:26,405 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:47:26,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 09:47:26,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-09-07 09:47:26,693 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:26,694 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2019-09-07 09:47:26,694 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:47:26,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:47:26,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:47:26,695 INFO L87 Difference]: Start difference. First operand 196 states and 205 transitions. Second operand 22 states. [2019-09-07 09:47:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:27,199 INFO L93 Difference]: Finished difference Result 394 states and 420 transitions. [2019-09-07 09:47:27,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 09:47:27,200 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 191 [2019-09-07 09:47:27,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:27,202 INFO L225 Difference]: With dead ends: 394 [2019-09-07 09:47:27,202 INFO L226 Difference]: Without dead ends: 223 [2019-09-07 09:47:27,203 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:47:27,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-09-07 09:47:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 214. [2019-09-07 09:47:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-09-07 09:47:27,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 223 transitions. [2019-09-07 09:47:27,212 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 223 transitions. Word has length 191 [2019-09-07 09:47:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:27,213 INFO L475 AbstractCegarLoop]: Abstraction has 214 states and 223 transitions. [2019-09-07 09:47:27,213 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:47:27,213 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 223 transitions. [2019-09-07 09:47:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-09-07 09:47:27,216 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:27,216 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 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 09:47:27,216 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:27,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2022608158, now seen corresponding path program 12 times [2019-09-07 09:47:27,217 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:27,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:27,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:27,219 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:47:27,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2019-09-07 09:47:27,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:27,463 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:47:27,482 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:48:49,947 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-09-07 09:48:49,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:48:49,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:48:49,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2019-09-07 09:48:50,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:50,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2019-09-07 09:48:50,166 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 09:48:50,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 09:48:50,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:48:50,168 INFO L87 Difference]: Start difference. First operand 214 states and 223 transitions. Second operand 24 states. [2019-09-07 09:48:50,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:50,745 INFO L93 Difference]: Finished difference Result 428 states and 454 transitions. [2019-09-07 09:48:50,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-07 09:48:50,751 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 209 [2019-09-07 09:48:50,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:50,753 INFO L225 Difference]: With dead ends: 428 [2019-09-07 09:48:50,753 INFO L226 Difference]: Without dead ends: 241 [2019-09-07 09:48:50,754 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:48:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-09-07 09:48:50,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 232. [2019-09-07 09:48:50,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-09-07 09:48:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 241 transitions. [2019-09-07 09:48:50,765 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 241 transitions. Word has length 209 [2019-09-07 09:48:50,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:50,766 INFO L475 AbstractCegarLoop]: Abstraction has 232 states and 241 transitions. [2019-09-07 09:48:50,766 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 09:48:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 241 transitions. [2019-09-07 09:48:50,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-09-07 09:48:50,769 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:50,769 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 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 09:48:50,769 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:50,770 INFO L82 PathProgramCache]: Analyzing trace with hash -412021460, now seen corresponding path program 13 times [2019-09-07 09:48:50,770 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:50,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:50,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:50,771 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:48:50,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:51,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2019-09-07 09:48:51,039 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:51,039 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) [2019-09-07 09:48:51,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:48:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:51,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:48:51,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2019-09-07 09:48:51,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:51,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 09:48:51,197 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:48:51,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:48:51,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:48:51,198 INFO L87 Difference]: Start difference. First operand 232 states and 241 transitions. Second operand 15 states. [2019-09-07 09:48:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:51,259 INFO L93 Difference]: Finished difference Result 438 states and 456 transitions. [2019-09-07 09:48:51,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:48:51,260 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 227 [2019-09-07 09:48:51,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:51,261 INFO L225 Difference]: With dead ends: 438 [2019-09-07 09:48:51,261 INFO L226 Difference]: Without dead ends: 235 [2019-09-07 09:48:51,262 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:48:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-09-07 09:48:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2019-09-07 09:48:51,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-09-07 09:48:51,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 243 transitions. [2019-09-07 09:48:51,271 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 243 transitions. Word has length 227 [2019-09-07 09:48:51,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:51,272 INFO L475 AbstractCegarLoop]: Abstraction has 234 states and 243 transitions. [2019-09-07 09:48:51,272 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:48:51,272 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 243 transitions. [2019-09-07 09:48:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-09-07 09:48:51,274 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:51,275 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 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 09:48:51,275 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:51,275 INFO L82 PathProgramCache]: Analyzing trace with hash -312440886, now seen corresponding path program 14 times [2019-09-07 09:48:51,275 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:51,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:51,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:51,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:48:51,277 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:51,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2019-09-07 09:48:51,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:51,563 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) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:48:51,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:48:51,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:48:51,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:48:51,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 09:48:51,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:51,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2019-09-07 09:48:51,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:51,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2019-09-07 09:48:51,917 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 09:48:51,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 09:48:51,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2019-09-07 09:48:51,918 INFO L87 Difference]: Start difference. First operand 234 states and 243 transitions. Second operand 27 states. [2019-09-07 09:48:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:52,504 INFO L93 Difference]: Finished difference Result 464 states and 490 transitions. [2019-09-07 09:48:52,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 09:48:52,510 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 229 [2019-09-07 09:48:52,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:52,512 INFO L225 Difference]: With dead ends: 464 [2019-09-07 09:48:52,512 INFO L226 Difference]: Without dead ends: 261 [2019-09-07 09:48:52,514 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2019-09-07 09:48:52,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2019-09-07 09:48:52,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 252. [2019-09-07 09:48:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2019-09-07 09:48:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 261 transitions. [2019-09-07 09:48:52,524 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 261 transitions. Word has length 229 [2019-09-07 09:48:52,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:52,526 INFO L475 AbstractCegarLoop]: Abstraction has 252 states and 261 transitions. [2019-09-07 09:48:52,526 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 09:48:52,526 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 261 transitions. [2019-09-07 09:48:52,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-09-07 09:48:52,529 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:52,529 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 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 09:48:52,529 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:52,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:52,530 INFO L82 PathProgramCache]: Analyzing trace with hash 439530712, now seen corresponding path program 15 times [2019-09-07 09:48:52,530 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:52,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:52,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:52,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:48:52,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1321 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2019-09-07 09:48:52,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:52,853 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:48:52,881 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:50:20,951 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-09-07 09:50:20,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:50:20,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 09:50:20,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:50:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1321 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2019-09-07 09:50:21,074 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:50:21,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 09:50:21,075 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:50:21,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:50:21,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:50:21,076 INFO L87 Difference]: Start difference. First operand 252 states and 261 transitions. Second operand 16 states. [2019-09-07 09:50:21,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:50:21,631 INFO L93 Difference]: Finished difference Result 469 states and 493 transitions. [2019-09-07 09:50:21,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:50:21,631 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 247 [2019-09-07 09:50:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:50:21,633 INFO L225 Difference]: With dead ends: 469 [2019-09-07 09:50:21,633 INFO L226 Difference]: Without dead ends: 276 [2019-09-07 09:50:21,635 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 247 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 09:50:21,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-09-07 09:50:21,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 268. [2019-09-07 09:50:21,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2019-09-07 09:50:21,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 277 transitions. [2019-09-07 09:50:21,649 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 277 transitions. Word has length 247 [2019-09-07 09:50:21,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:50:21,650 INFO L475 AbstractCegarLoop]: Abstraction has 268 states and 277 transitions. [2019-09-07 09:50:21,650 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:50:21,650 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 277 transitions. [2019-09-07 09:50:21,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2019-09-07 09:50:21,653 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:50:21,653 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 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 09:50:21,653 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:50:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:50:21,654 INFO L82 PathProgramCache]: Analyzing trace with hash 820410056, now seen corresponding path program 16 times [2019-09-07 09:50:21,654 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:50:21,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:50:21,655 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:21,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:50:21,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:50:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2019-09-07 09:50:22,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:50:22,057 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 09:50:22,089 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:50:22,229 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:50:22,229 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:50:22,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 09:50:22,237 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:50:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2019-09-07 09:50:22,303 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:50:22,303 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-07 09:50:22,304 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 09:50:22,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 09:50:22,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:50:22,305 INFO L87 Difference]: Start difference. First operand 268 states and 277 transitions. Second operand 17 states. [2019-09-07 09:50:22,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:50:22,387 INFO L93 Difference]: Finished difference Result 506 states and 524 transitions. [2019-09-07 09:50:22,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 09:50:22,388 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 263 [2019-09-07 09:50:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:50:22,389 INFO L225 Difference]: With dead ends: 506 [2019-09-07 09:50:22,389 INFO L226 Difference]: Without dead ends: 271 [2019-09-07 09:50:22,390 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 263 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 09:50:22,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2019-09-07 09:50:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 270. [2019-09-07 09:50:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2019-09-07 09:50:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 279 transitions. [2019-09-07 09:50:22,400 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 279 transitions. Word has length 263 [2019-09-07 09:50:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:50:22,401 INFO L475 AbstractCegarLoop]: Abstraction has 270 states and 279 transitions. [2019-09-07 09:50:22,401 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 09:50:22,401 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 279 transitions. [2019-09-07 09:50:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-09-07 09:50:22,403 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:50:22,403 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 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 09:50:22,403 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:50:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:50:22,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1203075686, now seen corresponding path program 17 times [2019-09-07 09:50:22,404 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:50:22,404 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:50:22,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:22,406 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:50:22,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:50:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:50:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1379 trivial. 0 not checked. [2019-09-07 09:50:22,810 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:50:22,810 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 09:50:22,839 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:52:37,642 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-09-07 09:52:37,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:37,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 09:52:37,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2019-09-07 09:52:38,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:38,053 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2019-09-07 09:52:38,054 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 09:52:38,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 09:52:38,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:52:38,055 INFO L87 Difference]: Start difference. First operand 270 states and 279 transitions. Second operand 31 states. [2019-09-07 09:52:38,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:52:38,650 INFO L93 Difference]: Finished difference Result 532 states and 558 transitions. [2019-09-07 09:52:38,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 09:52:38,651 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 265 [2019-09-07 09:52:38,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:52:38,655 INFO L225 Difference]: With dead ends: 532 [2019-09-07 09:52:38,655 INFO L226 Difference]: Without dead ends: 297 [2019-09-07 09:52:38,656 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:52:38,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2019-09-07 09:52:38,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 288. [2019-09-07 09:52:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2019-09-07 09:52:38,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 297 transitions. [2019-09-07 09:52:38,671 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 297 transitions. Word has length 265 [2019-09-07 09:52:38,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:52:38,671 INFO L475 AbstractCegarLoop]: Abstraction has 288 states and 297 transitions. [2019-09-07 09:52:38,671 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 09:52:38,672 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 297 transitions. [2019-09-07 09:52:38,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2019-09-07 09:52:38,673 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:52:38,674 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 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 09:52:38,675 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:52:38,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:52:38,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1569962100, now seen corresponding path program 18 times [2019-09-07 09:52:38,675 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:52:38,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:52:38,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:38,677 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:52:38,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:52:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:52:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1793 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1597 trivial. 0 not checked. [2019-09-07 09:52:39,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:52:39,172 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 09:52:39,196 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 09:54:41,717 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-07 09:54:41,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:54:41,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 50 conjunts are in the unsatisfiable core [2019-09-07 09:54:41,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1793 backedges. 110 proven. 196 refuted. 0 times theorem prover too weak. 1487 trivial. 0 not checked. [2019-09-07 09:54:41,920 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:41,920 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 22 [2019-09-07 09:54:41,921 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:54:41,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:54:41,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:54:41,922 INFO L87 Difference]: Start difference. First operand 288 states and 297 transitions. Second operand 22 states. [2019-09-07 09:54:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:42,871 INFO L93 Difference]: Finished difference Result 541 states and 573 transitions. [2019-09-07 09:54:42,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:54:42,872 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 283 [2019-09-07 09:54:42,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:42,874 INFO L225 Difference]: With dead ends: 541 [2019-09-07 09:54:42,874 INFO L226 Difference]: Without dead ends: 320 [2019-09-07 09:54:42,875 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=536, Invalid=946, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 09:54:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-09-07 09:54:42,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-09-07 09:54:42,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-09-07 09:54:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 329 transitions. [2019-09-07 09:54:42,886 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 329 transitions. Word has length 283 [2019-09-07 09:54:42,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:42,886 INFO L475 AbstractCegarLoop]: Abstraction has 320 states and 329 transitions. [2019-09-07 09:54:42,886 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:54:42,886 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 329 transitions. [2019-09-07 09:54:42,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-09-07 09:54:42,888 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:42,888 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 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 09:54:42,889 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:42,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:42,889 INFO L82 PathProgramCache]: Analyzing trace with hash 838708308, now seen corresponding path program 19 times [2019-09-07 09:54:42,889 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:42,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:42,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:42,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:54:42,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:43,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2019-09-07 09:54:43,233 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:43,233 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:54:43,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:54:43,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:43,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 09:54:43,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2019-09-07 09:54:43,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:43,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-07 09:54:43,475 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:54:43,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:54:43,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:54:43,476 INFO L87 Difference]: Start difference. First operand 320 states and 329 transitions. Second operand 19 states. [2019-09-07 09:54:43,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:43,557 INFO L93 Difference]: Finished difference Result 606 states and 624 transitions. [2019-09-07 09:54:43,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 09:54:43,560 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 315 [2019-09-07 09:54:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:43,562 INFO L225 Difference]: With dead ends: 606 [2019-09-07 09:54:43,562 INFO L226 Difference]: Without dead ends: 323 [2019-09-07 09:54:43,563 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:54:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2019-09-07 09:54:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2019-09-07 09:54:43,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2019-09-07 09:54:43,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 331 transitions. [2019-09-07 09:54:43,574 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 331 transitions. Word has length 315 [2019-09-07 09:54:43,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:43,574 INFO L475 AbstractCegarLoop]: Abstraction has 322 states and 331 transitions. [2019-09-07 09:54:43,574 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:54:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 331 transitions. [2019-09-07 09:54:43,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2019-09-07 09:54:43,576 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:43,576 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 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 09:54:43,577 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:43,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:43,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1449476878, now seen corresponding path program 20 times [2019-09-07 09:54:43,577 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:43,577 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:43,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:43,578 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:54:43,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2019-09-07 09:54:43,929 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:43,929 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 09:54:43,961 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 09:54:44,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:54:44,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:54:44,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:54:44,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:54:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (21)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:54:44,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:54:44,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 09:54:44,231 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:54:44,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:54:44,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:54:44,233 INFO L87 Difference]: Start difference. First operand 322 states and 331 transitions. Second operand 20 states. [2019-09-07 09:54:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:54:44,311 INFO L93 Difference]: Finished difference Result 608 states and 626 transitions. [2019-09-07 09:54:44,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:54:44,312 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 317 [2019-09-07 09:54:44,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:54:44,313 INFO L225 Difference]: With dead ends: 608 [2019-09-07 09:54:44,314 INFO L226 Difference]: Without dead ends: 325 [2019-09-07 09:54:44,315 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 317 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 09:54:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-09-07 09:54:44,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 324. [2019-09-07 09:54:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2019-09-07 09:54:44,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 333 transitions. [2019-09-07 09:54:44,326 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 333 transitions. Word has length 317 [2019-09-07 09:54:44,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:54:44,327 INFO L475 AbstractCegarLoop]: Abstraction has 324 states and 333 transitions. [2019-09-07 09:54:44,327 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:54:44,327 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 333 transitions. [2019-09-07 09:54:44,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2019-09-07 09:54:44,329 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:54:44,329 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 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 09:54:44,329 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:54:44,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:54:44,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1372185072, now seen corresponding path program 21 times [2019-09-07 09:54:44,330 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:54:44,330 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:54:44,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:44,331 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:54:44,331 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:54:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:54:44,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2337 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2081 trivial. 0 not checked. [2019-09-07 09:54:44,656 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:54:44,656 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 09:54:44,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:56:58,034 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-09-07 09:56:58,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:56:58,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 09:56:58,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:56:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2337 backedges. 64 proven. 256 refuted. 0 times theorem prover too weak. 2017 trivial. 0 not checked. [2019-09-07 09:56:58,248 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:56:58,248 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 24 [2019-09-07 09:56:58,249 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 09:56:58,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 09:56:58,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:56:58,250 INFO L87 Difference]: Start difference. First operand 324 states and 333 transitions. Second operand 24 states. [2019-09-07 09:56:59,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:56:59,269 INFO L93 Difference]: Finished difference Result 605 states and 637 transitions. [2019-09-07 09:56:59,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:56:59,269 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 319 [2019-09-07 09:56:59,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:56:59,271 INFO L225 Difference]: With dead ends: 605 [2019-09-07 09:56:59,271 INFO L226 Difference]: Without dead ends: 356 [2019-09-07 09:56:59,273 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=655, Invalid=1151, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 09:56:59,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2019-09-07 09:56:59,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2019-09-07 09:56:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2019-09-07 09:56:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 365 transitions. [2019-09-07 09:56:59,292 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 365 transitions. Word has length 319 [2019-09-07 09:56:59,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:56:59,293 INFO L475 AbstractCegarLoop]: Abstraction has 356 states and 365 transitions. [2019-09-07 09:56:59,293 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 09:56:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 365 transitions. [2019-09-07 09:56:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2019-09-07 09:56:59,295 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:56:59,296 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 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 09:56:59,296 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:56:59,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:56:59,296 INFO L82 PathProgramCache]: Analyzing trace with hash -29515280, now seen corresponding path program 22 times [2019-09-07 09:56:59,296 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:56:59,296 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:56:59,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:56:59,297 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:56:59,297 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:56:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:56:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2881 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2019-09-07 09:56:59,795 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:56:59,795 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) [2019-09-07 09:56:59,818 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:56:59,970 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:56:59,970 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:56:59,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:56:59,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:57:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2881 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2557 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (23)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:57:00,523 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:57:00,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2019-09-07 09:57:00,524 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-07 09:57:00,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-07 09:57:00,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 09:57:00,525 INFO L87 Difference]: Start difference. First operand 356 states and 365 transitions. Second operand 39 states. [2019-09-07 09:57:01,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:57:01,275 INFO L93 Difference]: Finished difference Result 698 states and 724 transitions. [2019-09-07 09:57:01,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-07 09:57:01,276 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 351 [2019-09-07 09:57:01,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:57:01,277 INFO L225 Difference]: With dead ends: 698 [2019-09-07 09:57:01,278 INFO L226 Difference]: Without dead ends: 383 [2019-09-07 09:57:01,279 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 09:57:01,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2019-09-07 09:57:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 374. [2019-09-07 09:57:01,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2019-09-07 09:57:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 383 transitions. [2019-09-07 09:57:01,290 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 383 transitions. Word has length 351 [2019-09-07 09:57:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:57:01,291 INFO L475 AbstractCegarLoop]: Abstraction has 374 states and 383 transitions. [2019-09-07 09:57:01,291 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-07 09:57:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 383 transitions. [2019-09-07 09:57:01,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2019-09-07 09:57:01,293 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:57:01,294 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 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 09:57:01,294 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:57:01,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:57:01,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1661686142, now seen corresponding path program 23 times [2019-09-07 09:57:01,294 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:57:01,294 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:57:01,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:57:01,295 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:57:01,295 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:57:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:57:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3212 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2019-09-07 09:57:01,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:57:01,759 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 09:57:01,781 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1