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_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 16:13:57,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 16:13:57,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 16:13:57,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 16:13:57,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 16:13:57,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 16:13:57,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 16:13:57,201 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 16:13:57,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 16:13:57,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 16:13:57,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 16:13:57,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 16:13:57,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 16:13:57,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 16:13:57,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 16:13:57,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 16:13:57,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 16:13:57,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 16:13:57,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 16:13:57,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 16:13:57,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 16:13:57,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 16:13:57,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 16:13:57,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 16:13:57,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 16:13:57,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 16:13:57,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 16:13:57,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 16:13:57,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 16:13:57,234 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 16:13:57,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 16:13:57,235 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 16:13:57,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 16:13:57,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 16:13:57,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 16:13:57,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 16:13:57,238 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 [2019-09-16 16:13:57,252 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 16:13:57,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 16:13:57,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-16 16:13:57,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-16 16:13:57,254 INFO L138 SettingsManager]: * Use SBE=true [2019-09-16 16:13:57,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 16:13:57,255 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 16:13:57,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-16 16:13:57,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 16:13:57,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 16:13:57,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 16:13:57,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 16:13:57,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 16:13:57,257 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 16:13:57,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 16:13:57,257 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-16 16:13:57,258 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 16:13:57,258 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 16:13:57,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 16:13:57,259 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-16 16:13:57,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-16 16:13:57,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 16:13:57,259 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 16:13:57,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 16:13:57,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-16 16:13:57,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-16 16:13:57,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 16:13:57,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-16 16:13:57,261 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 16:13:57,289 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 16:13:57,301 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 16:13:57,304 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 16:13:57,305 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 16:13:57,306 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 16:13:57,307 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-09-16 16:13:57,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45dc6aaef/fb830edeecf1426a9c5636d02c078767/FLAG24d41f925 [2019-09-16 16:13:57,756 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 16:13:57,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-09-16 16:13:57,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45dc6aaef/fb830edeecf1426a9c5636d02c078767/FLAG24d41f925 [2019-09-16 16:13:58,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45dc6aaef/fb830edeecf1426a9c5636d02c078767 [2019-09-16 16:13:58,161 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 16:13:58,163 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 16:13:58,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 16:13:58,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 16:13:58,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 16:13:58,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:13:58" (1/1) ... [2019-09-16 16:13:58,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8602cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:13:58, skipping insertion in model container [2019-09-16 16:13:58,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:13:58" (1/1) ... [2019-09-16 16:13:58,179 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 16:13:58,195 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 16:13:58,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:13:58,408 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 16:13:58,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:13:58,445 INFO L192 MainTranslator]: Completed translation [2019-09-16 16:13:58,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:13:58 WrapperNode [2019-09-16 16:13:58,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 16:13:58,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 16:13:58,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 16:13:58,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 16:13:58,543 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:13:58" (1/1) ... [2019-09-16 16:13:58,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:13:58" (1/1) ... [2019-09-16 16:13:58,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:13:58" (1/1) ... [2019-09-16 16:13:58,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:13:58" (1/1) ... [2019-09-16 16:13:58,562 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:13:58" (1/1) ... [2019-09-16 16:13:58,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:13:58" (1/1) ... [2019-09-16 16:13:58,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:13:58" (1/1) ... [2019-09-16 16:13:58,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 16:13:58,576 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 16:13:58,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 16:13:58,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 16:13:58,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:13:58" (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 [2019-09-16 16:13:58,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 16:13:58,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 16:13:58,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 16:13:58,636 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 16:13:58,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 16:13:58,636 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 16:13:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-16 16:13:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 16:13:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-16 16:13:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-16 16:13:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-16 16:13:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-16 16:13:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 16:13:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 16:13:58,904 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 16:13:58,905 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-16 16:13:58,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:13:58 BoogieIcfgContainer [2019-09-16 16:13:58,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 16:13:58,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 16:13:58,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 16:13:58,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 16:13:58,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 04:13:58" (1/3) ... [2019-09-16 16:13:58,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49160775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:13:58, skipping insertion in model container [2019-09-16 16:13:58,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:13:58" (2/3) ... [2019-09-16 16:13:58,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49160775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:13:58, skipping insertion in model container [2019-09-16 16:13:58,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:13:58" (3/3) ... [2019-09-16 16:13:58,914 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2019-09-16 16:13:58,929 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 16:13:58,943 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 16:13:58,978 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 16:13:59,008 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-16 16:13:59,008 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 16:13:59,008 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-16 16:13:59,009 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 16:13:59,009 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 16:13:59,009 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 16:13:59,009 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 16:13:59,009 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 16:13:59,009 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 16:13:59,025 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-09-16 16:13:59,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-16 16:13:59,030 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:13:59,031 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:13:59,033 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:13:59,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:13:59,039 INFO L82 PathProgramCache]: Analyzing trace with hash -526773211, now seen corresponding path program 1 times [2019-09-16 16:13:59,041 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:13:59,041 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:13:59,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:59,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:13:59,096 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:13:59,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:13:59,179 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:13:59,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 16:13:59,182 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 16:13:59,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 16:13:59,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 16:13:59,199 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-09-16 16:13:59,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:13:59,224 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2019-09-16 16:13:59,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 16:13:59,226 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-09-16 16:13:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:13:59,234 INFO L225 Difference]: With dead ends: 56 [2019-09-16 16:13:59,235 INFO L226 Difference]: Without dead ends: 27 [2019-09-16 16:13:59,238 INFO L636 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 [2019-09-16 16:13:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-16 16:13:59,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-16 16:13:59,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-16 16:13:59,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-09-16 16:13:59,285 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-09-16 16:13:59,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:13:59,285 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-09-16 16:13:59,285 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 16:13:59,285 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-09-16 16:13:59,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-16 16:13:59,286 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:13:59,287 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:13:59,287 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:13:59,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:13:59,288 INFO L82 PathProgramCache]: Analyzing trace with hash -777624222, now seen corresponding path program 1 times [2019-09-16 16:13:59,288 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:13:59,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:13:59,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:59,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:13:59,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:13:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:13:59,350 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:13:59,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 16:13:59,353 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 16:13:59,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 16:13:59,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 16:13:59,354 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-09-16 16:13:59,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:13:59,397 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-09-16 16:13:59,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 16:13:59,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-16 16:13:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:13:59,399 INFO L225 Difference]: With dead ends: 48 [2019-09-16 16:13:59,400 INFO L226 Difference]: Without dead ends: 29 [2019-09-16 16:13:59,401 INFO L636 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 [2019-09-16 16:13:59,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-16 16:13:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-16 16:13:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-16 16:13:59,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-09-16 16:13:59,408 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2019-09-16 16:13:59,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:13:59,408 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-09-16 16:13:59,408 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 16:13:59,409 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-09-16 16:13:59,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-16 16:13:59,410 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:13:59,410 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:13:59,411 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:13:59,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:13:59,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2101592964, now seen corresponding path program 1 times [2019-09-16 16:13:59,412 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:13:59,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:13:59,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:59,420 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:13:59,420 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:13:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-16 16:13:59,500 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:13:59,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-16 16:13:59,501 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-16 16:13:59,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-16 16:13:59,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-16 16:13:59,502 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-09-16 16:13:59,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:13:59,581 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-09-16 16:13:59,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 16:13:59,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-09-16 16:13:59,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:13:59,583 INFO L225 Difference]: With dead ends: 46 [2019-09-16 16:13:59,584 INFO L226 Difference]: Without dead ends: 33 [2019-09-16 16:13:59,586 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-16 16:13:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-16 16:13:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2019-09-16 16:13:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-16 16:13:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-09-16 16:13:59,596 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2019-09-16 16:13:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:13:59,598 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-09-16 16:13:59,598 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-16 16:13:59,599 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-09-16 16:13:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-16 16:13:59,600 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:13:59,601 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:13:59,601 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:13:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:13:59,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1818591568, now seen corresponding path program 1 times [2019-09-16 16:13:59,602 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:13:59,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:13:59,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:59,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:13:59,607 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:13:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-16 16:13:59,733 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:13:59,733 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-16 16:13:59,734 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 16:13:59,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 16:13:59,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-16 16:13:59,734 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2019-09-16 16:13:59,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:13:59,915 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-09-16 16:13:59,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 16:13:59,918 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-09-16 16:13:59,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:13:59,920 INFO L225 Difference]: With dead ends: 62 [2019-09-16 16:13:59,920 INFO L226 Difference]: Without dead ends: 42 [2019-09-16 16:13:59,921 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-16 16:13:59,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-16 16:13:59,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-09-16 16:13:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-16 16:13:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-09-16 16:13:59,935 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2019-09-16 16:13:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:13:59,936 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-09-16 16:13:59,936 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 16:13:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-09-16 16:13:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-16 16:13:59,938 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:13:59,939 INFO L407 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] [2019-09-16 16:13:59,939 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:13:59,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:13:59,940 INFO L82 PathProgramCache]: Analyzing trace with hash 334453631, now seen corresponding path program 1 times [2019-09-16 16:13:59,940 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:13:59,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:13:59,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:59,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:13:59,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:13:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-16 16:14:00,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:00,049 INFO L224 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 [2019-09-16 16:14:00,075 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:00,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-16 16:14:00,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-16 16:14:00,182 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:00,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-09-16 16:14:00,183 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-16 16:14:00,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-16 16:14:00,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-09-16 16:14:00,184 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 10 states. [2019-09-16 16:14:00,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:00,474 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2019-09-16 16:14:00,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-16 16:14:00,476 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2019-09-16 16:14:00,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:00,479 INFO L225 Difference]: With dead ends: 86 [2019-09-16 16:14:00,479 INFO L226 Difference]: Without dead ends: 62 [2019-09-16 16:14:00,480 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-09-16 16:14:00,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-09-16 16:14:00,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2019-09-16 16:14:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-16 16:14:00,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-09-16 16:14:00,498 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 26 [2019-09-16 16:14:00,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:00,498 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-09-16 16:14:00,499 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-16 16:14:00,499 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-09-16 16:14:00,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-16 16:14:00,501 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:00,502 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:00,502 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:00,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:00,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1076752728, now seen corresponding path program 2 times [2019-09-16 16:14:00,503 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:00,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:00,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:00,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:00,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-16 16:14:00,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:00,675 INFO L224 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 [2019-09-16 16:14:00,700 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:14:00,736 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:14:00,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:00,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-16 16:14:00,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-16 16:14:00,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:00,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2019-09-16 16:14:00,773 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-16 16:14:00,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-16 16:14:00,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-09-16 16:14:00,773 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 12 states. [2019-09-16 16:14:01,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:01,146 INFO L93 Difference]: Finished difference Result 145 states and 198 transitions. [2019-09-16 16:14:01,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-16 16:14:01,148 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2019-09-16 16:14:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:01,151 INFO L225 Difference]: With dead ends: 145 [2019-09-16 16:14:01,151 INFO L226 Difference]: Without dead ends: 116 [2019-09-16 16:14:01,152 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2019-09-16 16:14:01,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-09-16 16:14:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 63. [2019-09-16 16:14:01,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-16 16:14:01,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2019-09-16 16:14:01,168 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 34 [2019-09-16 16:14:01,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:01,169 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2019-09-16 16:14:01,169 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-16 16:14:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2019-09-16 16:14:01,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-16 16:14:01,171 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:01,171 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:01,171 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:01,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:01,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1104086922, now seen corresponding path program 1 times [2019-09-16 16:14:01,172 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:01,172 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:01,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:01,177 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:01,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:01,319 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-16 16:14:01,319 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:01,320 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-16 16:14:01,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:14:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:01,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-16 16:14:01,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:01,464 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-16 16:14:01,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:01,469 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-16 16:14:01,469 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-16 16:14:01,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-16 16:14:01,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-16 16:14:01,470 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand 12 states. [2019-09-16 16:14:01,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:01,751 INFO L93 Difference]: Finished difference Result 178 states and 250 transitions. [2019-09-16 16:14:01,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-16 16:14:01,752 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-09-16 16:14:01,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:01,753 INFO L225 Difference]: With dead ends: 178 [2019-09-16 16:14:01,754 INFO L226 Difference]: Without dead ends: 130 [2019-09-16 16:14:01,755 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2019-09-16 16:14:01,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-09-16 16:14:01,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 51. [2019-09-16 16:14:01,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-16 16:14:01,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-09-16 16:14:01,764 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 36 [2019-09-16 16:14:01,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:01,765 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-09-16 16:14:01,765 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-16 16:14:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-09-16 16:14:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-16 16:14:01,766 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:01,766 INFO L407 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:01,766 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:01,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:01,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1653847887, now seen corresponding path program 3 times [2019-09-16 16:14:01,767 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:01,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:01,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:01,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:01,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:01,926 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-09-16 16:14:01,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:01,927 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-16 16:14:01,949 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:14:01,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-16 16:14:01,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:01,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-16 16:14:01,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:02,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:14:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-16 16:14:02,039 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:02,039 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 13 [2019-09-16 16:14:02,040 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-16 16:14:02,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-16 16:14:02,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-09-16 16:14:02,041 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 13 states. [2019-09-16 16:14:02,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:02,457 INFO L93 Difference]: Finished difference Result 160 states and 221 transitions. [2019-09-16 16:14:02,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-16 16:14:02,458 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2019-09-16 16:14:02,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:02,460 INFO L225 Difference]: With dead ends: 160 [2019-09-16 16:14:02,460 INFO L226 Difference]: Without dead ends: 147 [2019-09-16 16:14:02,461 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2019-09-16 16:14:02,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-09-16 16:14:02,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 85. [2019-09-16 16:14:02,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-16 16:14:02,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2019-09-16 16:14:02,477 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 41 [2019-09-16 16:14:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:02,477 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2019-09-16 16:14:02,477 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-16 16:14:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2019-09-16 16:14:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-16 16:14:02,488 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:02,488 INFO L407 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:02,489 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:02,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:02,489 INFO L82 PathProgramCache]: Analyzing trace with hash -510083147, now seen corresponding path program 1 times [2019-09-16 16:14:02,489 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:02,489 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:02,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:02,491 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:02,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-09-16 16:14:02,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:02,588 INFO L224 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 [2019-09-16 16:14:02,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:02,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:02,633 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-16 16:14:02,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-16 16:14:02,677 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:02,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2019-09-16 16:14:02,678 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-16 16:14:02,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-16 16:14:02,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-09-16 16:14:02,683 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand 12 states. [2019-09-16 16:14:03,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:03,040 INFO L93 Difference]: Finished difference Result 366 states and 536 transitions. [2019-09-16 16:14:03,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-16 16:14:03,041 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2019-09-16 16:14:03,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:03,043 INFO L225 Difference]: With dead ends: 366 [2019-09-16 16:14:03,043 INFO L226 Difference]: Without dead ends: 298 [2019-09-16 16:14:03,044 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2019-09-16 16:14:03,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-09-16 16:14:03,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 93. [2019-09-16 16:14:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-16 16:14:03,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 128 transitions. [2019-09-16 16:14:03,060 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 128 transitions. Word has length 44 [2019-09-16 16:14:03,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:03,061 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 128 transitions. [2019-09-16 16:14:03,061 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-16 16:14:03,061 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 128 transitions. [2019-09-16 16:14:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-16 16:14:03,062 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:03,062 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:03,062 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:03,063 INFO L82 PathProgramCache]: Analyzing trace with hash -396829064, now seen corresponding path program 2 times [2019-09-16 16:14:03,063 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:03,063 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:03,064 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:03,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:03,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-09-16 16:14:03,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:03,201 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:14:03,233 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:14:03,260 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:14:03,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:03,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-16 16:14:03,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-09-16 16:14:03,348 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:03,349 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2019-09-16 16:14:03,349 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-16 16:14:03,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-16 16:14:03,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2019-09-16 16:14:03,350 INFO L87 Difference]: Start difference. First operand 93 states and 128 transitions. Second operand 17 states. [2019-09-16 16:14:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:04,246 INFO L93 Difference]: Finished difference Result 454 states and 670 transitions. [2019-09-16 16:14:04,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-16 16:14:04,247 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2019-09-16 16:14:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:04,248 INFO L225 Difference]: With dead ends: 454 [2019-09-16 16:14:04,249 INFO L226 Difference]: Without dead ends: 269 [2019-09-16 16:14:04,251 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=716, Invalid=2040, Unknown=0, NotChecked=0, Total=2756 [2019-09-16 16:14:04,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-09-16 16:14:04,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 105. [2019-09-16 16:14:04,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-16 16:14:04,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2019-09-16 16:14:04,265 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 49 [2019-09-16 16:14:04,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:04,265 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2019-09-16 16:14:04,265 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-16 16:14:04,266 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2019-09-16 16:14:04,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-09-16 16:14:04,267 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:04,267 INFO L407 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:04,267 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:04,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:04,268 INFO L82 PathProgramCache]: Analyzing trace with hash -611115395, now seen corresponding path program 4 times [2019-09-16 16:14:04,268 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:04,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:04,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:04,269 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:04,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:04,378 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-09-16 16:14:04,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:04,379 INFO L224 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 [2019-09-16 16:14:04,406 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 16:14:04,451 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 16:14:04,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:04,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-16 16:14:04,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-09-16 16:14:04,590 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:04,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-09-16 16:14:04,591 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-16 16:14:04,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-16 16:14:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-09-16 16:14:04,592 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand 18 states. [2019-09-16 16:14:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:05,558 INFO L93 Difference]: Finished difference Result 350 states and 472 transitions. [2019-09-16 16:14:05,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-16 16:14:05,559 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 63 [2019-09-16 16:14:05,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:05,561 INFO L225 Difference]: With dead ends: 350 [2019-09-16 16:14:05,561 INFO L226 Difference]: Without dead ends: 266 [2019-09-16 16:14:05,563 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=734, Invalid=1716, Unknown=0, NotChecked=0, Total=2450 [2019-09-16 16:14:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-09-16 16:14:05,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 114. [2019-09-16 16:14:05,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-16 16:14:05,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2019-09-16 16:14:05,576 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 63 [2019-09-16 16:14:05,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:05,576 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2019-09-16 16:14:05,577 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-16 16:14:05,577 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2019-09-16 16:14:05,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-16 16:14:05,578 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:05,578 INFO L407 BasicCegarLoop]: trace histogram [18, 18, 18, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:05,578 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:05,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:05,579 INFO L82 PathProgramCache]: Analyzing trace with hash 215199622, now seen corresponding path program 5 times [2019-09-16 16:14:05,579 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:05,579 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:05,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:05,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:05,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 119 proven. 507 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-09-16 16:14:05,986 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:05,987 INFO L224 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 [2019-09-16 16:14:06,025 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-16 16:14:06,058 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-09-16 16:14:06,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:06,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-16 16:14:06,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:06,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:14:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 436 proven. 55 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2019-09-16 16:14:06,217 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:06,217 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 12] total 37 [2019-09-16 16:14:06,217 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-16 16:14:06,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-16 16:14:06,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2019-09-16 16:14:06,219 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand 37 states. [2019-09-16 16:14:09,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:09,993 INFO L93 Difference]: Finished difference Result 513 states and 733 transitions. [2019-09-16 16:14:09,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-09-16 16:14:09,994 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 107 [2019-09-16 16:14:09,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:09,997 INFO L225 Difference]: With dead ends: 513 [2019-09-16 16:14:09,997 INFO L226 Difference]: Without dead ends: 419 [2019-09-16 16:14:10,003 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3204 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2557, Invalid=10553, Unknown=0, NotChecked=0, Total=13110 [2019-09-16 16:14:10,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2019-09-16 16:14:10,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 205. [2019-09-16 16:14:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-09-16 16:14:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 263 transitions. [2019-09-16 16:14:10,031 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 263 transitions. Word has length 107 [2019-09-16 16:14:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:10,032 INFO L475 AbstractCegarLoop]: Abstraction has 205 states and 263 transitions. [2019-09-16 16:14:10,032 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-16 16:14:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 263 transitions. [2019-09-16 16:14:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-09-16 16:14:10,036 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:10,036 INFO L407 BasicCegarLoop]: trace histogram [28, 28, 28, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:10,036 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:10,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:10,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1872470850, now seen corresponding path program 6 times [2019-09-16 16:14:10,037 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:10,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:10,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:10,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:10,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:10,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 20 proven. 1198 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-09-16 16:14:10,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:10,354 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:14:10,418 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-16 16:14:10,586 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-16 16:14:10,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:10,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-16 16:14:10,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:10,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:14:10,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 0 proven. 1204 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-09-16 16:14:10,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:10,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 18 [2019-09-16 16:14:10,715 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-16 16:14:10,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-16 16:14:10,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2019-09-16 16:14:10,716 INFO L87 Difference]: Start difference. First operand 205 states and 263 transitions. Second operand 18 states. [2019-09-16 16:14:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:11,614 INFO L93 Difference]: Finished difference Result 331 states and 424 transitions. [2019-09-16 16:14:11,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-16 16:14:11,614 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 137 [2019-09-16 16:14:11,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:11,618 INFO L225 Difference]: With dead ends: 331 [2019-09-16 16:14:11,618 INFO L226 Difference]: Without dead ends: 318 [2019-09-16 16:14:11,620 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2019-09-16 16:14:11,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-09-16 16:14:11,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 229. [2019-09-16 16:14:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-09-16 16:14:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 295 transitions. [2019-09-16 16:14:11,658 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 295 transitions. Word has length 137 [2019-09-16 16:14:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:11,660 INFO L475 AbstractCegarLoop]: Abstraction has 229 states and 295 transitions. [2019-09-16 16:14:11,660 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-16 16:14:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 295 transitions. [2019-09-16 16:14:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-09-16 16:14:11,663 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:11,664 INFO L407 BasicCegarLoop]: trace histogram [35, 35, 35, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:11,664 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:11,664 INFO L82 PathProgramCache]: Analyzing trace with hash 586009211, now seen corresponding path program 7 times [2019-09-16 16:14:11,665 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:11,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:11,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:11,668 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:11,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 672 proven. 159 refuted. 0 times theorem prover too weak. 1390 trivial. 0 not checked. [2019-09-16 16:14:11,906 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:11,906 INFO L224 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) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:14:11,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:12,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-16 16:14:12,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2157 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-16 16:14:12,192 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:12,192 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2019-09-16 16:14:12,192 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-16 16:14:12,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-16 16:14:12,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2019-09-16 16:14:12,193 INFO L87 Difference]: Start difference. First operand 229 states and 295 transitions. Second operand 24 states. [2019-09-16 16:14:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:14,222 INFO L93 Difference]: Finished difference Result 487 states and 638 transitions. [2019-09-16 16:14:14,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-09-16 16:14:14,223 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 161 [2019-09-16 16:14:14,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:14,225 INFO L225 Difference]: With dead ends: 487 [2019-09-16 16:14:14,225 INFO L226 Difference]: Without dead ends: 281 [2019-09-16 16:14:14,229 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2104, Invalid=4868, Unknown=0, NotChecked=0, Total=6972 [2019-09-16 16:14:14,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-09-16 16:14:14,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 234. [2019-09-16 16:14:14,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-09-16 16:14:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 302 transitions. [2019-09-16 16:14:14,252 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 302 transitions. Word has length 161 [2019-09-16 16:14:14,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:14,252 INFO L475 AbstractCegarLoop]: Abstraction has 234 states and 302 transitions. [2019-09-16 16:14:14,252 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-16 16:14:14,252 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 302 transitions. [2019-09-16 16:14:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-09-16 16:14:14,254 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:14,254 INFO L407 BasicCegarLoop]: trace histogram [36, 36, 36, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:14,255 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:14,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:14,255 INFO L82 PathProgramCache]: Analyzing trace with hash -635882284, now seen corresponding path program 8 times [2019-09-16 16:14:14,255 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:14,255 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:14,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:14,258 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:14:14,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:14,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2351 backedges. 23 proven. 1975 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2019-09-16 16:14:14,522 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:14,522 INFO L224 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 [2019-09-16 16:14:14,572 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:14:14,672 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:14:14,672 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:14,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-16 16:14:14,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2351 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2270 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (12)] Exception during sending of exit command (exit): Broken pipe [2019-09-16 16:14:14,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:14,750 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 19 [2019-09-16 16:14:14,752 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-16 16:14:14,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-16 16:14:14,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2019-09-16 16:14:14,752 INFO L87 Difference]: Start difference. First operand 234 states and 302 transitions. Second operand 19 states. [2019-09-16 16:14:15,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:15,846 INFO L93 Difference]: Finished difference Result 573 states and 748 transitions. [2019-09-16 16:14:15,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-16 16:14:15,847 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 166 [2019-09-16 16:14:15,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:15,849 INFO L225 Difference]: With dead ends: 573 [2019-09-16 16:14:15,849 INFO L226 Difference]: Without dead ends: 364 [2019-09-16 16:14:15,851 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=824, Invalid=2256, Unknown=0, NotChecked=0, Total=3080 [2019-09-16 16:14:15,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-09-16 16:14:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 260. [2019-09-16 16:14:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-09-16 16:14:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 336 transitions. [2019-09-16 16:14:15,876 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 336 transitions. Word has length 166 [2019-09-16 16:14:15,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:15,876 INFO L475 AbstractCegarLoop]: Abstraction has 260 states and 336 transitions. [2019-09-16 16:14:15,876 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-16 16:14:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 336 transitions. [2019-09-16 16:14:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-09-16 16:14:15,878 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:15,879 INFO L407 BasicCegarLoop]: trace histogram [43, 43, 43, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:15,879 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:15,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1028235619, now seen corresponding path program 9 times [2019-09-16 16:14:15,879 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:15,880 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:15,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:15,881 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:15,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3313 backedges. 1115 proven. 1903 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2019-09-16 16:14:16,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:16,487 INFO L224 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 [2019-09-16 16:14:16,524 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 16:14:16,659 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-09-16 16:14:16,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:16,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-16 16:14:16,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:16,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:14:16,730 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:14:16,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:14:16,754 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:14:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3313 backedges. 964 proven. 92 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2019-09-16 16:14:16,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:16,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 14] total 40 [2019-09-16 16:14:16,817 INFO L454 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-09-16 16:14:16,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-09-16 16:14:16,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2019-09-16 16:14:16,819 INFO L87 Difference]: Start difference. First operand 260 states and 336 transitions. Second operand 40 states. [2019-09-16 16:14:41,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:41,935 INFO L93 Difference]: Finished difference Result 1862 states and 2595 transitions. [2019-09-16 16:14:41,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 532 states. [2019-09-16 16:14:41,936 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 192 [2019-09-16 16:14:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:41,942 INFO L225 Difference]: With dead ends: 1862 [2019-09-16 16:14:41,943 INFO L226 Difference]: Without dead ends: 1819 [2019-09-16 16:14:41,967 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 1075 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 564 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144810 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=43124, Invalid=276666, Unknown=0, NotChecked=0, Total=319790 [2019-09-16 16:14:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2019-09-16 16:14:42,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 266. [2019-09-16 16:14:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2019-09-16 16:14:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 344 transitions. [2019-09-16 16:14:42,009 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 344 transitions. Word has length 192 [2019-09-16 16:14:42,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:42,010 INFO L475 AbstractCegarLoop]: Abstraction has 266 states and 344 transitions. [2019-09-16 16:14:42,010 INFO L476 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-09-16 16:14:42,010 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 344 transitions. [2019-09-16 16:14:42,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-09-16 16:14:42,011 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:42,012 INFO L407 BasicCegarLoop]: trace histogram [45, 45, 45, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:42,012 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:42,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:42,012 INFO L82 PathProgramCache]: Analyzing trace with hash -557907377, now seen corresponding path program 10 times [2019-09-16 16:14:42,013 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:42,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:42,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:42,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:42,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3592 backedges. 26 proven. 3079 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2019-09-16 16:14:42,268 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:42,268 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:14:42,329 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 16:14:42,449 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 16:14:42,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:42,453 INFO L256 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-16 16:14:42,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3592 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3492 trivial. 0 not checked. [2019-09-16 16:14:42,528 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:42,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 20 [2019-09-16 16:14:42,530 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-16 16:14:42,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-16 16:14:42,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2019-09-16 16:14:42,538 INFO L87 Difference]: Start difference. First operand 266 states and 344 transitions. Second operand 20 states. [2019-09-16 16:14:43,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:14:43,638 INFO L93 Difference]: Finished difference Result 645 states and 843 transitions. [2019-09-16 16:14:43,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-09-16 16:14:43,639 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 198 [2019-09-16 16:14:43,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:14:43,641 INFO L225 Difference]: With dead ends: 645 [2019-09-16 16:14:43,641 INFO L226 Difference]: Without dead ends: 406 [2019-09-16 16:14:43,643 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=981, Invalid=2679, Unknown=0, NotChecked=0, Total=3660 [2019-09-16 16:14:43,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2019-09-16 16:14:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 295. [2019-09-16 16:14:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2019-09-16 16:14:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 382 transitions. [2019-09-16 16:14:43,673 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 382 transitions. Word has length 198 [2019-09-16 16:14:43,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:14:43,674 INFO L475 AbstractCegarLoop]: Abstraction has 295 states and 382 transitions. [2019-09-16 16:14:43,674 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-16 16:14:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 382 transitions. [2019-09-16 16:14:43,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-09-16 16:14:43,675 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:14:43,675 INFO L407 BasicCegarLoop]: trace histogram [53, 53, 53, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:14:43,676 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:14:43,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:14:43,676 INFO L82 PathProgramCache]: Analyzing trace with hash 341402101, now seen corresponding path program 11 times [2019-09-16 16:14:43,676 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:14:43,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:14:43,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:43,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:14:43,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:14:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:14:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4930 backedges. 1867 proven. 2655 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-09-16 16:14:44,262 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:14:44,263 INFO L224 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 [2019-09-16 16:14:44,325 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-16 16:14:44,489 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2019-09-16 16:14:44,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:14:44,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-16 16:14:44,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:14:44,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:14:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4930 backedges. 3174 proven. 1243 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2019-09-16 16:14:44,615 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:14:44,615 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 22] total 41 [2019-09-16 16:14:44,615 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-16 16:14:44,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-16 16:14:44,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2019-09-16 16:14:44,616 INFO L87 Difference]: Start difference. First operand 295 states and 382 transitions. Second operand 41 states. [2019-09-16 16:15:05,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:15:05,051 INFO L93 Difference]: Finished difference Result 1624 states and 2248 transitions. [2019-09-16 16:15:05,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 480 states. [2019-09-16 16:15:05,051 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 227 [2019-09-16 16:15:05,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:15:05,060 INFO L225 Difference]: With dead ends: 1624 [2019-09-16 16:15:05,060 INFO L226 Difference]: Without dead ends: 1579 [2019-09-16 16:15:05,076 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 1025 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 513 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114984 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=33840, Invalid=230870, Unknown=0, NotChecked=0, Total=264710 [2019-09-16 16:15:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2019-09-16 16:15:05,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 298. [2019-09-16 16:15:05,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2019-09-16 16:15:05,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 385 transitions. [2019-09-16 16:15:05,117 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 385 transitions. Word has length 227 [2019-09-16 16:15:05,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:15:05,118 INFO L475 AbstractCegarLoop]: Abstraction has 298 states and 385 transitions. [2019-09-16 16:15:05,118 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-16 16:15:05,118 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 385 transitions. [2019-09-16 16:15:05,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-09-16 16:15:05,119 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:15:05,119 INFO L407 BasicCegarLoop]: trace histogram [54, 54, 54, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:15:05,120 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:15:05,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:15:05,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2080063114, now seen corresponding path program 12 times [2019-09-16 16:15:05,120 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:15:05,120 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:15:05,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:15:05,122 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:15:05,123 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:15:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:15:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5099 backedges. 1350 proven. 250 refuted. 0 times theorem prover too weak. 3499 trivial. 0 not checked. [2019-09-16 16:15:05,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:15:05,385 INFO L224 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 [2019-09-16 16:15:05,483 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-16 16:15:05,790 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2019-09-16 16:15:05,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:15:05,792 INFO L256 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-16 16:15:05,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:15:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5099 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4978 trivial. 0 not checked. [2019-09-16 16:15:05,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:15:05,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2019-09-16 16:15:05,985 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-16 16:15:05,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-16 16:15:05,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2019-09-16 16:15:05,986 INFO L87 Difference]: Start difference. First operand 298 states and 385 transitions. Second operand 29 states. [2019-09-16 16:15:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:15:09,389 INFO L93 Difference]: Finished difference Result 660 states and 869 transitions. [2019-09-16 16:15:09,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-09-16 16:15:09,389 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 230 [2019-09-16 16:15:09,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:15:09,392 INFO L225 Difference]: With dead ends: 660 [2019-09-16 16:15:09,392 INFO L226 Difference]: Without dead ends: 391 [2019-09-16 16:15:09,394 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5523 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4675, Invalid=10825, Unknown=0, NotChecked=0, Total=15500 [2019-09-16 16:15:09,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2019-09-16 16:15:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 336. [2019-09-16 16:15:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2019-09-16 16:15:09,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 437 transitions. [2019-09-16 16:15:09,430 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 437 transitions. Word has length 230 [2019-09-16 16:15:09,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:15:09,430 INFO L475 AbstractCegarLoop]: Abstraction has 336 states and 437 transitions. [2019-09-16 16:15:09,431 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-16 16:15:09,431 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 437 transitions. [2019-09-16 16:15:09,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2019-09-16 16:15:09,432 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:15:09,433 INFO L407 BasicCegarLoop]: trace histogram [65, 65, 65, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:15:09,433 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:15:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:15:09,433 INFO L82 PathProgramCache]: Analyzing trace with hash -876509997, now seen corresponding path program 13 times [2019-09-16 16:15:09,433 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:15:09,434 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:15:09,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:15:09,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:15:09,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:15:09,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:15:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7275 backedges. 1815 proven. 303 refuted. 0 times theorem prover too weak. 5157 trivial. 0 not checked. [2019-09-16 16:15:09,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:15:09,735 INFO L224 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 [2019-09-16 16:15:09,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:15:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:15:09,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-16 16:15:09,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:15:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7275 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 7131 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (17)] Exception during sending of exit command (exit): Broken pipe [2019-09-16 16:15:10,211 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:15:10,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2019-09-16 16:15:10,212 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-16 16:15:10,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-16 16:15:10,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2019-09-16 16:15:10,213 INFO L87 Difference]: Start difference. First operand 336 states and 437 transitions. Second operand 31 states. [2019-09-16 16:15:14,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:15:14,423 INFO L93 Difference]: Finished difference Result 740 states and 981 transitions. [2019-09-16 16:15:14,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2019-09-16 16:15:14,423 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 268 [2019-09-16 16:15:14,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:15:14,426 INFO L225 Difference]: With dead ends: 740 [2019-09-16 16:15:14,427 INFO L226 Difference]: Without dead ends: 435 [2019-09-16 16:15:14,429 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7438 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6064, Invalid=13958, Unknown=0, NotChecked=0, Total=20022 [2019-09-16 16:15:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2019-09-16 16:15:14,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 377. [2019-09-16 16:15:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2019-09-16 16:15:14,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 494 transitions. [2019-09-16 16:15:14,469 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 494 transitions. Word has length 268 [2019-09-16 16:15:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:15:14,469 INFO L475 AbstractCegarLoop]: Abstraction has 377 states and 494 transitions. [2019-09-16 16:15:14,470 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-16 16:15:14,470 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 494 transitions. [2019-09-16 16:15:14,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-09-16 16:15:14,472 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:15:14,472 INFO L407 BasicCegarLoop]: trace histogram [77, 77, 77, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:15:14,472 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:15:14,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:15:14,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1942373745, now seen corresponding path program 14 times [2019-09-16 16:15:14,473 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:15:14,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:15:14,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:15:14,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:15:14,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:15:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:15:14,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10081 backedges. 2376 proven. 361 refuted. 0 times theorem prover too weak. 7344 trivial. 0 not checked. [2019-09-16 16:15:14,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:15:14,862 INFO L224 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 [2019-09-16 16:15:14,996 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:15:15,153 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:15:15,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:15:15,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-16 16:15:15,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:15:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10081 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 9912 trivial. 0 not checked. [2019-09-16 16:15:15,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:15:15,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2019-09-16 16:15:15,438 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-16 16:15:15,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-16 16:15:15,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=838, Unknown=0, NotChecked=0, Total=1056 [2019-09-16 16:15:15,439 INFO L87 Difference]: Start difference. First operand 377 states and 494 transitions. Second operand 33 states. [2019-09-16 16:15:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:15:20,487 INFO L93 Difference]: Finished difference Result 826 states and 1103 transitions. [2019-09-16 16:15:20,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2019-09-16 16:15:20,487 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 309 [2019-09-16 16:15:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:15:20,490 INFO L225 Difference]: With dead ends: 826 [2019-09-16 16:15:20,490 INFO L226 Difference]: Without dead ends: 482 [2019-09-16 16:15:20,493 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9801 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7735, Invalid=17705, Unknown=0, NotChecked=0, Total=25440 [2019-09-16 16:15:20,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2019-09-16 16:15:20,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 421. [2019-09-16 16:15:20,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2019-09-16 16:15:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 556 transitions. [2019-09-16 16:15:20,536 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 556 transitions. Word has length 309 [2019-09-16 16:15:20,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:15:20,537 INFO L475 AbstractCegarLoop]: Abstraction has 421 states and 556 transitions. [2019-09-16 16:15:20,537 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-16 16:15:20,537 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 556 transitions. [2019-09-16 16:15:20,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2019-09-16 16:15:20,539 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:15:20,540 INFO L407 BasicCegarLoop]: trace histogram [90, 90, 90, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:15:20,540 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:15:20,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:15:20,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1230882070, now seen corresponding path program 15 times [2019-09-16 16:15:20,540 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:15:20,540 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:15:20,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:15:20,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:15:20,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:15:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:15:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13628 backedges. 3042 proven. 424 refuted. 0 times theorem prover too weak. 10162 trivial. 0 not checked. [2019-09-16 16:15:21,012 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:15:21,012 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:15:21,110 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 16:15:21,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-09-16 16:15:21,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:15:21,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-16 16:15:21,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:15:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13628 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 13432 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (19)] Exception during sending of exit command (exit): Stream closed [2019-09-16 16:15:21,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:15:21,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2019-09-16 16:15:21,908 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-16 16:15:21,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-16 16:15:21,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2019-09-16 16:15:21,908 INFO L87 Difference]: Start difference. First operand 421 states and 556 transitions. Second operand 35 states. [2019-09-16 16:15:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:15:27,914 INFO L93 Difference]: Finished difference Result 918 states and 1235 transitions. [2019-09-16 16:15:27,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2019-09-16 16:15:27,918 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 353 [2019-09-16 16:15:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:15:27,920 INFO L225 Difference]: With dead ends: 918 [2019-09-16 16:15:27,920 INFO L226 Difference]: Without dead ends: 532 [2019-09-16 16:15:27,924 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12675 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9723, Invalid=22139, Unknown=0, NotChecked=0, Total=31862 [2019-09-16 16:15:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2019-09-16 16:15:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 468. [2019-09-16 16:15:27,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2019-09-16 16:15:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 623 transitions. [2019-09-16 16:15:27,963 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 623 transitions. Word has length 353 [2019-09-16 16:15:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:15:27,963 INFO L475 AbstractCegarLoop]: Abstraction has 468 states and 623 transitions. [2019-09-16 16:15:27,963 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-16 16:15:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 623 transitions. [2019-09-16 16:15:27,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2019-09-16 16:15:27,966 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:15:27,966 INFO L407 BasicCegarLoop]: trace histogram [104, 104, 104, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:15:27,967 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:15:27,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:15:27,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1069634738, now seen corresponding path program 16 times [2019-09-16 16:15:27,967 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:15:27,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:15:27,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:15:27,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:15:27,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:15:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:15:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18036 backedges. 3822 proven. 492 refuted. 0 times theorem prover too weak. 13722 trivial. 0 not checked. [2019-09-16 16:15:28,413 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:15:28,413 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:15:28,523 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 16:15:28,755 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 16:15:28,755 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:15:28,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-16 16:15:28,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:15:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18036 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 17811 trivial. 0 not checked. [2019-09-16 16:15:29,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:15:29,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2019-09-16 16:15:29,076 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-16 16:15:29,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-16 16:15:29,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1054, Unknown=0, NotChecked=0, Total=1332 [2019-09-16 16:15:29,077 INFO L87 Difference]: Start difference. First operand 468 states and 623 transitions. Second operand 37 states. [2019-09-16 16:15:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:15:36,259 INFO L93 Difference]: Finished difference Result 1016 states and 1377 transitions. [2019-09-16 16:15:36,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2019-09-16 16:15:36,259 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 400 [2019-09-16 16:15:36,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:15:36,262 INFO L225 Difference]: With dead ends: 1016 [2019-09-16 16:15:36,262 INFO L226 Difference]: Without dead ends: 585 [2019-09-16 16:15:36,264 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16127 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=12065, Invalid=27337, Unknown=0, NotChecked=0, Total=39402 [2019-09-16 16:15:36,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2019-09-16 16:15:36,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 518. [2019-09-16 16:15:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2019-09-16 16:15:36,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 695 transitions. [2019-09-16 16:15:36,312 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 695 transitions. Word has length 400 [2019-09-16 16:15:36,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:15:36,313 INFO L475 AbstractCegarLoop]: Abstraction has 518 states and 695 transitions. [2019-09-16 16:15:36,313 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-16 16:15:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 695 transitions. [2019-09-16 16:15:36,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2019-09-16 16:15:36,316 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:15:36,316 INFO L407 BasicCegarLoop]: trace histogram [119, 119, 119, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:15:36,316 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:15:36,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:15:36,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1791777349, now seen corresponding path program 17 times [2019-09-16 16:15:36,317 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:15:36,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:15:36,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:15:36,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:15:36,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:15:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:15:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 23434 backedges. 4725 proven. 565 refuted. 0 times theorem prover too weak. 18144 trivial. 0 not checked. [2019-09-16 16:15:36,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:15:36,754 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:15:36,880 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-16 16:15:37,778 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 61 check-sat command(s) [2019-09-16 16:15:37,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:15:37,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-16 16:15:37,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:15:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 23434 backedges. 15836 proven. 5750 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2019-09-16 16:15:38,636 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:15:38,637 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 34] total 54 [2019-09-16 16:15:38,638 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-16 16:15:38,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-16 16:15:38,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=2504, Unknown=0, NotChecked=0, Total=2862 [2019-09-16 16:15:38,638 INFO L87 Difference]: Start difference. First operand 518 states and 695 transitions. Second operand 54 states. [2019-09-16 16:16:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:16:03,872 INFO L93 Difference]: Finished difference Result 5557 states and 7955 transitions. [2019-09-16 16:16:03,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 519 states. [2019-09-16 16:16:03,873 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 450 [2019-09-16 16:16:03,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:16:03,891 INFO L225 Difference]: With dead ends: 5557 [2019-09-16 16:16:03,891 INFO L226 Difference]: Without dead ends: 5138 [2019-09-16 16:16:03,901 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 1315 GetRequests, 746 SyntacticMatches, 1 SemanticMatches, 568 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134596 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=42174, Invalid=282156, Unknown=0, NotChecked=0, Total=324330 [2019-09-16 16:16:03,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5138 states. [2019-09-16 16:16:04,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5138 to 1413. [2019-09-16 16:16:04,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1413 states. [2019-09-16 16:16:04,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 1871 transitions. [2019-09-16 16:16:04,107 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 1871 transitions. Word has length 450 [2019-09-16 16:16:04,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:16:04,108 INFO L475 AbstractCegarLoop]: Abstraction has 1413 states and 1871 transitions. [2019-09-16 16:16:04,108 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-16 16:16:04,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 1871 transitions. [2019-09-16 16:16:04,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2019-09-16 16:16:04,113 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:16:04,113 INFO L407 BasicCegarLoop]: trace histogram [120, 120, 120, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:16:04,114 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:16:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:16:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2130724750, now seen corresponding path program 18 times [2019-09-16 16:16:04,114 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:16:04,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:16:04,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:16:04,117 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:16:04,117 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:16:04,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:16:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 23806 backedges. 44 proven. 21736 refuted. 0 times theorem prover too weak. 2026 trivial. 0 not checked. [2019-09-16 16:16:04,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:16:04,646 INFO L224 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 [2019-09-16 16:16:04,793 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-16 16:16:05,746 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2019-09-16 16:16:05,746 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:16:05,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 894 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-16 16:16:05,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:16:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 23806 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 23550 trivial. 0 not checked. [2019-09-16 16:16:05,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:16:05,894 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 26 [2019-09-16 16:16:05,894 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-16 16:16:05,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-16 16:16:05,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2019-09-16 16:16:05,895 INFO L87 Difference]: Start difference. First operand 1413 states and 1871 transitions. Second operand 26 states. [2019-09-16 16:16:07,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:16:07,948 INFO L93 Difference]: Finished difference Result 3109 states and 4117 transitions. [2019-09-16 16:16:07,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-09-16 16:16:07,948 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 453 [2019-09-16 16:16:07,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:16:07,954 INFO L225 Difference]: With dead ends: 3109 [2019-09-16 16:16:07,954 INFO L226 Difference]: Without dead ends: 1735 [2019-09-16 16:16:07,957 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2217, Invalid=5973, Unknown=0, NotChecked=0, Total=8190 [2019-09-16 16:16:07,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2019-09-16 16:16:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1463. [2019-09-16 16:16:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1463 states. [2019-09-16 16:16:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 1937 transitions. [2019-09-16 16:16:08,134 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 1937 transitions. Word has length 453 [2019-09-16 16:16:08,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:16:08,134 INFO L475 AbstractCegarLoop]: Abstraction has 1463 states and 1937 transitions. [2019-09-16 16:16:08,134 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-16 16:16:08,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 1937 transitions. [2019-09-16 16:16:08,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2019-09-16 16:16:08,140 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:16:08,140 INFO L407 BasicCegarLoop]: trace histogram [135, 135, 135, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:16:08,140 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:16:08,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:16:08,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1733619383, now seen corresponding path program 19 times [2019-09-16 16:16:08,141 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:16:08,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:16:08,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:16:08,144 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:16:08,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:16:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:16:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 29960 backedges. 5760 proven. 643 refuted. 0 times theorem prover too weak. 23557 trivial. 0 not checked. [2019-09-16 16:16:08,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:16:08,703 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:16:08,846 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:16:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:16:09,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-16 16:16:09,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:16:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 29960 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 29671 trivial. 0 not checked. [2019-09-16 16:16:09,564 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:16:09,564 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2019-09-16 16:16:09,565 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-16 16:16:09,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-16 16:16:09,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1294, Unknown=0, NotChecked=0, Total=1640 [2019-09-16 16:16:09,565 INFO L87 Difference]: Start difference. First operand 1463 states and 1937 transitions. Second operand 41 states. [2019-09-16 16:16:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:16:19,519 INFO L93 Difference]: Finished difference Result 3109 states and 4135 transitions. [2019-09-16 16:16:19,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2019-09-16 16:16:19,520 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 503 [2019-09-16 16:16:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:16:19,527 INFO L225 Difference]: With dead ends: 3109 [2019-09-16 16:16:19,527 INFO L226 Difference]: Without dead ends: 1687 [2019-09-16 16:16:19,532 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 656 SyntacticMatches, 0 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25053 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=17969, Invalid=40353, Unknown=0, NotChecked=0, Total=58322 [2019-09-16 16:16:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2019-09-16 16:16:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 1519. [2019-09-16 16:16:19,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1519 states. [2019-09-16 16:16:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 2013 transitions. [2019-09-16 16:16:19,716 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 2013 transitions. Word has length 503 [2019-09-16 16:16:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:16:19,717 INFO L475 AbstractCegarLoop]: Abstraction has 1519 states and 2013 transitions. [2019-09-16 16:16:19,717 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-16 16:16:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 2013 transitions. [2019-09-16 16:16:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2019-09-16 16:16:19,723 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:16:19,723 INFO L407 BasicCegarLoop]: trace histogram [152, 152, 152, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:16:19,724 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:16:19,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:16:19,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1905621038, now seen corresponding path program 20 times [2019-09-16 16:16:19,724 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:16:19,724 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:16:19,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:16:19,727 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:16:19,727 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:16:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:16:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 37761 backedges. 6936 proven. 726 refuted. 0 times theorem prover too weak. 30099 trivial. 0 not checked. [2019-09-16 16:16:20,500 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:16:20,500 INFO L224 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 [2019-09-16 16:16:20,649 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:16:20,927 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:16:20,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:16:20,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 2114 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-16 16:16:20,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:16:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 37761 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 37437 trivial. 0 not checked. [2019-09-16 16:16:21,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:16:21,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 43 [2019-09-16 16:16:21,427 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-16 16:16:21,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-16 16:16:21,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1423, Unknown=0, NotChecked=0, Total=1806 [2019-09-16 16:16:21,428 INFO L87 Difference]: Start difference. First operand 1519 states and 2013 transitions. Second operand 43 states. [2019-09-16 16:16:32,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:16:32,961 INFO L93 Difference]: Finished difference Result 3225 states and 4295 transitions. [2019-09-16 16:16:32,961 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 225 states. [2019-09-16 16:16:32,961 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 559 [2019-09-16 16:16:32,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:16:32,969 INFO L225 Difference]: With dead ends: 3225 [2019-09-16 16:16:32,969 INFO L226 Difference]: Without dead ends: 1749 [2019-09-16 16:16:32,976 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 993 GetRequests, 730 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30681 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=21615, Invalid=48345, Unknown=0, NotChecked=0, Total=69960 [2019-09-16 16:16:32,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2019-09-16 16:16:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1578. [2019-09-16 16:16:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2019-09-16 16:16:33,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2094 transitions. [2019-09-16 16:16:33,150 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2094 transitions. Word has length 559 [2019-09-16 16:16:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:16:33,151 INFO L475 AbstractCegarLoop]: Abstraction has 1578 states and 2094 transitions. [2019-09-16 16:16:33,151 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-16 16:16:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2094 transitions. [2019-09-16 16:16:33,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2019-09-16 16:16:33,158 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:16:33,158 INFO L407 BasicCegarLoop]: trace histogram [170, 170, 170, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:16:33,158 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:16:33,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:16:33,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1048192986, now seen corresponding path program 21 times [2019-09-16 16:16:33,159 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:16:33,159 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:16:33,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:16:33,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:16:33,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:16:33,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:16:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 46993 backedges. 8262 proven. 814 refuted. 0 times theorem prover too weak. 37917 trivial. 0 not checked. [2019-09-16 16:16:34,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:16:34,037 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:16:34,242 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 16:16:36,092 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2019-09-16 16:16:36,092 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:16:36,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-16 16:16:36,105 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:16:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 46993 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 46632 trivial. 0 not checked. [2019-09-16 16:16:36,929 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:16:36,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 45 [2019-09-16 16:16:36,930 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-16 16:16:36,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-16 16:16:36,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1558, Unknown=0, NotChecked=0, Total=1980 [2019-09-16 16:16:36,931 INFO L87 Difference]: Start difference. First operand 1578 states and 2094 transitions. Second operand 45 states. [2019-09-16 16:16:50,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:16:50,473 INFO L93 Difference]: Finished difference Result 3347 states and 4465 transitions. [2019-09-16 16:16:50,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2019-09-16 16:16:50,473 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 618 [2019-09-16 16:16:50,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:16:50,481 INFO L225 Difference]: With dead ends: 3347 [2019-09-16 16:16:50,481 INFO L226 Difference]: Without dead ends: 1814 [2019-09-16 16:16:50,487 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 1095 GetRequests, 808 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37195 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=25783, Invalid=57449, Unknown=0, NotChecked=0, Total=83232 [2019-09-16 16:16:50,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2019-09-16 16:16:50,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 1640. [2019-09-16 16:16:50,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2019-09-16 16:16:50,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2180 transitions. [2019-09-16 16:16:50,661 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2180 transitions. Word has length 618 [2019-09-16 16:16:50,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:16:50,661 INFO L475 AbstractCegarLoop]: Abstraction has 1640 states and 2180 transitions. [2019-09-16 16:16:50,661 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-16 16:16:50,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2180 transitions. [2019-09-16 16:16:50,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 681 [2019-09-16 16:16:50,669 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:16:50,669 INFO L407 BasicCegarLoop]: trace histogram [189, 189, 189, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:16:50,669 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:16:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:16:50,670 INFO L82 PathProgramCache]: Analyzing trace with hash 716783523, now seen corresponding path program 22 times [2019-09-16 16:16:50,670 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:16:50,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:16:50,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:16:50,672 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:16:50,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:16:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:16:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 57821 backedges. 9747 proven. 907 refuted. 0 times theorem prover too weak. 47167 trivial. 0 not checked. [2019-09-16 16:16:51,666 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:16:51,666 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:16:51,850 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 16:16:52,257 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 16:16:52,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:16:52,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 2584 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-16 16:16:52,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:16:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 57821 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 57421 trivial. 0 not checked. [2019-09-16 16:16:52,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:16:52,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 47 [2019-09-16 16:16:52,960 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-16 16:16:52,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-16 16:16:52,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1699, Unknown=0, NotChecked=0, Total=2162 [2019-09-16 16:16:52,961 INFO L87 Difference]: Start difference. First operand 1640 states and 2180 transitions. Second operand 47 states. [2019-09-16 16:17:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:17:08,542 INFO L93 Difference]: Finished difference Result 3475 states and 4645 transitions. [2019-09-16 16:17:08,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 270 states. [2019-09-16 16:17:08,543 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 680 [2019-09-16 16:17:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:17:08,551 INFO L225 Difference]: With dead ends: 3475 [2019-09-16 16:17:08,551 INFO L226 Difference]: Without dead ends: 1882 [2019-09-16 16:17:08,559 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 1202 GetRequests, 890 SyntacticMatches, 0 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44682 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=30520, Invalid=67762, Unknown=0, NotChecked=0, Total=98282 [2019-09-16 16:17:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2019-09-16 16:17:08,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1705. [2019-09-16 16:17:08,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1705 states. [2019-09-16 16:17:08,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2271 transitions. [2019-09-16 16:17:08,697 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2271 transitions. Word has length 680 [2019-09-16 16:17:08,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:17:08,697 INFO L475 AbstractCegarLoop]: Abstraction has 1705 states and 2271 transitions. [2019-09-16 16:17:08,697 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-16 16:17:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2271 transitions. [2019-09-16 16:17:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 746 [2019-09-16 16:17:08,705 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:17:08,706 INFO L407 BasicCegarLoop]: trace histogram [209, 209, 209, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:17:08,706 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:17:08,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:17:08,707 INFO L82 PathProgramCache]: Analyzing trace with hash -12875743, now seen corresponding path program 23 times [2019-09-16 16:17:08,707 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:17:08,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:17:08,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:17:08,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:17:08,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:17:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:17:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 70419 backedges. 11400 proven. 1005 refuted. 0 times theorem prover too weak. 58014 trivial. 0 not checked. [2019-09-16 16:17:09,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:17:09,967 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:17:10,150 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-16 16:17:15,772 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 89 check-sat command(s) [2019-09-16 16:17:15,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:17:15,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 2776 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-16 16:17:15,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:17:17,273 INFO L134 CoverageAnalysis]: Checked inductivity of 70419 backedges. 51982 proven. 13775 refuted. 0 times theorem prover too weak. 4662 trivial. 0 not checked. [2019-09-16 16:17:17,290 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:17:17,290 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 44] total 69 [2019-09-16 16:17:17,291 INFO L454 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-09-16 16:17:17,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-09-16 16:17:17,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=4097, Unknown=0, NotChecked=0, Total=4692 [2019-09-16 16:17:17,292 INFO L87 Difference]: Start difference. First operand 1705 states and 2271 transitions. Second operand 69 states. [2019-09-16 16:17:52,744 WARN L191 SmtUtils]: Spent 761.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2019-09-16 16:18:07,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:18:07,898 INFO L93 Difference]: Finished difference Result 20520 states and 29015 transitions. [2019-09-16 16:18:07,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 862 states. [2019-09-16 16:18:07,898 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 745 [2019-09-16 16:18:07,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:18:07,944 INFO L225 Difference]: With dead ends: 20520 [2019-09-16 16:18:07,944 INFO L226 Difference]: Without dead ends: 19056 [2019-09-16 16:18:08,014 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2186 GetRequests, 1238 SyntacticMatches, 22 SemanticMatches, 926 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377489 ImplicationChecksByTransitivity, 44.7s TimeCoverageRelationStatistics Valid=100668, Invalid=759588, Unknown=0, NotChecked=0, Total=860256 [2019-09-16 16:18:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19056 states. [2019-09-16 16:18:08,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19056 to 3590. [2019-09-16 16:18:08,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3590 states. [2019-09-16 16:18:08,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3590 states to 3590 states and 4775 transitions. [2019-09-16 16:18:08,563 INFO L78 Accepts]: Start accepts. Automaton has 3590 states and 4775 transitions. Word has length 745 [2019-09-16 16:18:08,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:18:08,563 INFO L475 AbstractCegarLoop]: Abstraction has 3590 states and 4775 transitions. [2019-09-16 16:18:08,563 INFO L476 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-09-16 16:18:08,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3590 states and 4775 transitions. [2019-09-16 16:18:08,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 749 [2019-09-16 16:18:08,574 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:18:08,574 INFO L407 BasicCegarLoop]: trace histogram [210, 210, 210, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:18:08,574 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:18:08,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:18:08,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1820521548, now seen corresponding path program 24 times [2019-09-16 16:18:08,575 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:18:08,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:18:08,577 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:18:08,578 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:18:08,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:18:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:18:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 71066 backedges. 59 proven. 66406 refuted. 0 times theorem prover too weak. 4601 trivial. 0 not checked. [2019-09-16 16:18:09,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:18:09,553 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:18:09,774 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-16 16:18:14,313 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-09-16 16:18:14,314 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:18:14,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-16 16:18:14,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:18:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 71066 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 70625 trivial. 0 not checked. [2019-09-16 16:18:14,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:18:14,705 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 31 [2019-09-16 16:18:14,705 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-16 16:18:14,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-16 16:18:14,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2019-09-16 16:18:14,706 INFO L87 Difference]: Start difference. First operand 3590 states and 4775 transitions. Second operand 31 states. [2019-09-16 16:18:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:18:17,832 INFO L93 Difference]: Finished difference Result 7682 states and 10206 transitions. [2019-09-16 16:18:17,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-09-16 16:18:17,833 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 748 [2019-09-16 16:18:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:18:17,841 INFO L225 Difference]: With dead ends: 7682 [2019-09-16 16:18:17,842 INFO L226 Difference]: Without dead ends: 4141 [2019-09-16 16:18:17,850 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 764 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4073 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3632, Invalid=9708, Unknown=0, NotChecked=0, Total=13340 [2019-09-16 16:18:17,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2019-09-16 16:18:18,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3655. [2019-09-16 16:18:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3655 states. [2019-09-16 16:18:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3655 states to 3655 states and 4861 transitions. [2019-09-16 16:18:18,501 INFO L78 Accepts]: Start accepts. Automaton has 3655 states and 4861 transitions. Word has length 748 [2019-09-16 16:18:18,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:18:18,501 INFO L475 AbstractCegarLoop]: Abstraction has 3655 states and 4861 transitions. [2019-09-16 16:18:18,501 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-16 16:18:18,501 INFO L276 IsEmpty]: Start isEmpty. Operand 3655 states and 4861 transitions. [2019-09-16 16:18:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 814 [2019-09-16 16:18:18,512 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:18:18,512 INFO L407 BasicCegarLoop]: trace histogram [230, 230, 230, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:18:18,513 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:18:18,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:18:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash -408135098, now seen corresponding path program 25 times [2019-09-16 16:18:18,513 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:18:18,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:18:18,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:18:18,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:18:18,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:18:18,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:18:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 84970 backedges. 13230 proven. 1108 refuted. 0 times theorem prover too weak. 70632 trivial. 0 not checked. [2019-09-16 16:18:19,390 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:18:19,390 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:18:19,629 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:18:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:18:20,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 3102 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-16 16:18:20,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:18:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 84970 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 84486 trivial. 0 not checked. [2019-09-16 16:18:20,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:18:20,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 51 [2019-09-16 16:18:20,889 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-16 16:18:20,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-16 16:18:20,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=1999, Unknown=0, NotChecked=0, Total=2550 [2019-09-16 16:18:20,890 INFO L87 Difference]: Start difference. First operand 3655 states and 4861 transitions. Second operand 51 states. [2019-09-16 16:18:26,416 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 11 [2019-09-16 16:18:42,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:18:42,280 INFO L93 Difference]: Finished difference Result 7647 states and 10191 transitions. [2019-09-16 16:18:42,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2019-09-16 16:18:42,281 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 813 [2019-09-16 16:18:42,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:18:42,288 INFO L225 Difference]: With dead ends: 7647 [2019-09-16 16:18:42,289 INFO L226 Difference]: Without dead ends: 4043 [2019-09-16 16:18:42,304 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 1431 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62943 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=41899, Invalid=92423, Unknown=0, NotChecked=0, Total=134322 [2019-09-16 16:18:42,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4043 states. [2019-09-16 16:18:42,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4043 to 3726. [2019-09-16 16:18:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3726 states. [2019-09-16 16:18:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3726 states to 3726 states and 4957 transitions. [2019-09-16 16:18:42,820 INFO L78 Accepts]: Start accepts. Automaton has 3726 states and 4957 transitions. Word has length 813 [2019-09-16 16:18:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:18:42,820 INFO L475 AbstractCegarLoop]: Abstraction has 3726 states and 4957 transitions. [2019-09-16 16:18:42,820 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-16 16:18:42,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3726 states and 4957 transitions. [2019-09-16 16:18:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2019-09-16 16:18:42,828 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:18:42,829 INFO L407 BasicCegarLoop]: trace histogram [252, 252, 252, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:18:42,829 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:18:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:18:42,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2122586110, now seen corresponding path program 26 times [2019-09-16 16:18:42,829 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:18:42,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:18:42,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:18:42,832 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:18:42,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:18:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:18:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 101666 backedges. 15246 proven. 1216 refuted. 0 times theorem prover too weak. 85204 trivial. 0 not checked. [2019-09-16 16:18:43,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:18:43,967 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:18:44,202 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:18:44,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:18:44,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:18:44,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 3379 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-16 16:18:44,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:18:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 101666 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 101137 trivial. 0 not checked. [2019-09-16 16:18:45,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:18:45,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 53 [2019-09-16 16:18:45,625 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-16 16:18:45,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-16 16:18:45,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=2158, Unknown=0, NotChecked=0, Total=2756 [2019-09-16 16:18:45,626 INFO L87 Difference]: Start difference. First operand 3726 states and 4957 transitions. Second operand 53 states. [2019-09-16 16:19:04,799 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2019-09-16 16:19:09,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:19:09,385 INFO L93 Difference]: Finished difference Result 7793 states and 10391 transitions. [2019-09-16 16:19:09,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 345 states. [2019-09-16 16:19:09,390 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 884 [2019-09-16 16:19:09,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:19:09,399 INFO L225 Difference]: With dead ends: 7793 [2019-09-16 16:19:09,400 INFO L226 Difference]: Without dead ends: 4120 [2019-09-16 16:19:09,416 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1160 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73911 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=48645, Invalid=106985, Unknown=0, NotChecked=0, Total=155630 [2019-09-16 16:19:09,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2019-09-16 16:19:09,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 3800. [2019-09-16 16:19:09,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3800 states. [2019-09-16 16:19:09,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 5058 transitions. [2019-09-16 16:19:09,935 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 5058 transitions. Word has length 884 [2019-09-16 16:19:09,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:19:09,936 INFO L475 AbstractCegarLoop]: Abstraction has 3800 states and 5058 transitions. [2019-09-16 16:19:09,936 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-16 16:19:09,936 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 5058 transitions. [2019-09-16 16:19:09,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2019-09-16 16:19:09,945 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:19:09,945 INFO L407 BasicCegarLoop]: trace histogram [275, 275, 275, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:19:09,945 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:19:09,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:19:09,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1885404533, now seen corresponding path program 27 times [2019-09-16 16:19:09,946 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:19:09,946 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:19:09,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:09,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:19:09,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 120708 backedges. 17457 proven. 1329 refuted. 0 times theorem prover too weak. 101922 trivial. 0 not checked. [2019-09-16 16:19:11,451 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:19:11,451 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:19:11,716 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 16:19:16,733 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2019-09-16 16:19:16,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:19:16,742 INFO L256 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-16 16:19:16,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:19:16,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:19:16,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:19:16,868 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:19:16,868 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:19:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 120708 backedges. 17549 proven. 715 refuted. 0 times theorem prover too weak. 102444 trivial. 0 not checked. [2019-09-16 16:19:17,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:19:17,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 36 [2019-09-16 16:19:17,188 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-16 16:19:17,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-16 16:19:17,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2019-09-16 16:19:17,189 INFO L87 Difference]: Start difference. First operand 3800 states and 5058 transitions. Second operand 36 states. [2019-09-16 16:19:19,660 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 11 [2019-09-16 16:19:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:19:21,826 INFO L93 Difference]: Finished difference Result 13949 states and 19565 transitions. [2019-09-16 16:19:21,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-09-16 16:19:21,827 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 958 [2019-09-16 16:19:21,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:19:21,845 INFO L225 Difference]: With dead ends: 13949 [2019-09-16 16:19:21,846 INFO L226 Difference]: Without dead ends: 13936 [2019-09-16 16:19:21,852 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 1003 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3368 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3684, Invalid=8088, Unknown=0, NotChecked=0, Total=11772 [2019-09-16 16:19:21,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13936 states. [2019-09-16 16:19:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13936 to 3806. [2019-09-16 16:19:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3806 states. [2019-09-16 16:19:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3806 states to 3806 states and 5068 transitions. [2019-09-16 16:19:22,481 INFO L78 Accepts]: Start accepts. Automaton has 3806 states and 5068 transitions. Word has length 958 [2019-09-16 16:19:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:19:22,482 INFO L475 AbstractCegarLoop]: Abstraction has 3806 states and 5068 transitions. [2019-09-16 16:19:22,482 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-16 16:19:22,483 INFO L276 IsEmpty]: Start isEmpty. Operand 3806 states and 5068 transitions. [2019-09-16 16:19:22,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 965 [2019-09-16 16:19:22,495 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:19:22,495 INFO L407 BasicCegarLoop]: trace histogram [277, 277, 277, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:19:22,495 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:19:22,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:19:22,496 INFO L82 PathProgramCache]: Analyzing trace with hash 369141053, now seen corresponding path program 28 times [2019-09-16 16:19:22,496 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:19:22,496 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:19:22,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:22,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:19:22,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 122407 backedges. 783 proven. 115395 refuted. 0 times theorem prover too weak. 6229 trivial. 0 not checked. [2019-09-16 16:19:24,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:19:24,475 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:19:24,738 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 16:19:25,311 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 16:19:25,312 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:19:25,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 3692 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-16 16:19:25,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:19:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 122407 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 121831 trivial. 0 not checked. [2019-09-16 16:19:25,820 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:19:25,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 27] total 57 [2019-09-16 16:19:25,822 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-16 16:19:25,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-16 16:19:25,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=2519, Unknown=0, NotChecked=0, Total=3192 [2019-09-16 16:19:25,822 INFO L87 Difference]: Start difference. First operand 3806 states and 5068 transitions. Second operand 57 states. [2019-09-16 16:19:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:19:36,532 INFO L93 Difference]: Finished difference Result 8821 states and 11751 transitions. [2019-09-16 16:19:36,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2019-09-16 16:19:36,532 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 964 [2019-09-16 16:19:36,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:19:36,536 INFO L225 Difference]: With dead ends: 8821 [2019-09-16 16:19:36,536 INFO L226 Difference]: Without dead ends: 5070 [2019-09-16 16:19:36,544 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 1269 GetRequests, 963 SyntacticMatches, 0 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44098 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=27096, Invalid=67460, Unknown=0, NotChecked=0, Total=94556 [2019-09-16 16:19:36,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5070 states. [2019-09-16 16:19:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5070 to 3940. [2019-09-16 16:19:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3940 states. [2019-09-16 16:19:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 5248 transitions. [2019-09-16 16:19:37,068 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 5248 transitions. Word has length 964 [2019-09-16 16:19:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:19:37,068 INFO L475 AbstractCegarLoop]: Abstraction has 3940 states and 5248 transitions. [2019-09-16 16:19:37,068 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-16 16:19:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 5248 transitions. [2019-09-16 16:19:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1030 [2019-09-16 16:19:37,078 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:19:37,079 INFO L407 BasicCegarLoop]: trace histogram [297, 297, 297, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:19:37,079 INFO L418 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:19:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:19:37,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1256922965, now seen corresponding path program 29 times [2019-09-16 16:19:37,079 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:19:37,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:19:37,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:37,081 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:19:37,081 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:19:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:19:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 140473 backedges. 83946 proven. 50919 refuted. 0 times theorem prover too weak. 5608 trivial. 0 not checked. [2019-09-16 16:19:41,109 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:19:41,109 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:19:41,391 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-16 16:19:43,405 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 109 check-sat command(s) [2019-09-16 16:19:43,406 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:19:43,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 3429 conjuncts, 45 conjunts are in the unsatisfiable core [2019-09-16 16:19:43,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:19:43,639 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:19:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 140473 backedges. 113509 proven. 15363 refuted. 0 times theorem prover too weak. 11601 trivial. 0 not checked. [2019-09-16 16:19:44,178 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:19:44,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 46] total 106 [2019-09-16 16:19:44,179 INFO L454 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-09-16 16:19:44,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-09-16 16:19:44,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1177, Invalid=9953, Unknown=0, NotChecked=0, Total=11130 [2019-09-16 16:19:44,180 INFO L87 Difference]: Start difference. First operand 3940 states and 5248 transitions. Second operand 106 states. [2019-09-16 16:20:20,667 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2019-09-16 16:20:44,401 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 14 [2019-09-16 16:21:20,739 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 16 [2019-09-16 16:21:32,431 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-09-16 16:22:33,188 WARN L191 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 16 [2019-09-16 16:24:39,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:24:39,396 INFO L93 Difference]: Finished difference Result 44246 states and 62024 transitions. [2019-09-16 16:24:39,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3006 states. [2019-09-16 16:24:39,396 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 1029 [2019-09-16 16:24:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:24:39,417 INFO L225 Difference]: With dead ends: 44246 [2019-09-16 16:24:39,417 INFO L226 Difference]: Without dead ends: 22075 [2019-09-16 16:24:40,451 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 5936 GetRequests, 2828 SyntacticMatches, 4 SemanticMatches, 3104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4565771 ImplicationChecksByTransitivity, 266.7s TimeCoverageRelationStatistics Valid=992262, Invalid=8651868, Unknown=0, NotChecked=0, Total=9644130 [2019-09-16 16:24:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22075 states. [2019-09-16 16:24:40,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22075 to 3263. [2019-09-16 16:24:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3263 states. [2019-09-16 16:24:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 4332 transitions. [2019-09-16 16:24:40,969 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 4332 transitions. Word has length 1029 [2019-09-16 16:24:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:24:40,970 INFO L475 AbstractCegarLoop]: Abstraction has 3263 states and 4332 transitions. [2019-09-16 16:24:40,970 INFO L476 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-09-16 16:24:40,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 4332 transitions. [2019-09-16 16:24:40,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2019-09-16 16:24:40,978 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:24:40,979 INFO L407 BasicCegarLoop]: trace histogram [299, 299, 299, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:24:40,979 INFO L418 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:24:40,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:24:40,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1275168263, now seen corresponding path program 30 times [2019-09-16 16:24:40,980 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:24:40,980 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:24:40,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:24:40,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:24:40,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:24:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:24:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 142306 backedges. 19872 proven. 1447 refuted. 0 times theorem prover too weak. 120987 trivial. 0 not checked. [2019-09-16 16:24:42,836 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:24:42,836 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:24:43,255 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-16 16:24:53,569 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2019-09-16 16:24:53,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:24:53,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 1749 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-16 16:24:53,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:24:53,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:24:53,647 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:24:53,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:24:53,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:24:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 142306 backedges. 19919 proven. 782 refuted. 0 times theorem prover too weak. 121605 trivial. 0 not checked. [2019-09-16 16:24:54,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:24:54,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 35 [2019-09-16 16:24:54,656 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-16 16:24:54,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-16 16:24:54,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=834, Unknown=0, NotChecked=0, Total=1190 [2019-09-16 16:24:54,656 INFO L87 Difference]: Start difference. First operand 3263 states and 4332 transitions. Second operand 35 states. [2019-09-16 16:25:00,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:25:00,300 INFO L93 Difference]: Finished difference Result 12211 states and 17176 transitions. [2019-09-16 16:25:00,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2019-09-16 16:25:00,300 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 1035 [2019-09-16 16:25:00,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:25:00,313 INFO L225 Difference]: With dead ends: 12211 [2019-09-16 16:25:00,313 INFO L226 Difference]: Without dead ends: 12198 [2019-09-16 16:25:00,316 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 1189 GetRequests, 1082 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3644, Invalid=8128, Unknown=0, NotChecked=0, Total=11772 [2019-09-16 16:25:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12198 states. [2019-09-16 16:25:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12198 to 3266. [2019-09-16 16:25:01,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3266 states. [2019-09-16 16:25:01,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 4337 transitions. [2019-09-16 16:25:01,591 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 4337 transitions. Word has length 1035 [2019-09-16 16:25:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:25:01,592 INFO L475 AbstractCegarLoop]: Abstraction has 3266 states and 4337 transitions. [2019-09-16 16:25:01,592 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-16 16:25:01,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 4337 transitions. [2019-09-16 16:25:01,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1039 [2019-09-16 16:25:01,601 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:25:01,602 INFO L407 BasicCegarLoop]: trace histogram [300, 300, 300, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:25:01,602 INFO L418 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:25:01,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:25:01,602 INFO L82 PathProgramCache]: Analyzing trace with hash -697265292, now seen corresponding path program 31 times [2019-09-16 16:25:01,602 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:25:01,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:25:01,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:25:01,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:25:01,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:25:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:25:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 143227 backedges. 71 proven. 135379 refuted. 0 times theorem prover too weak. 7777 trivial. 0 not checked. [2019-09-16 16:25:02,983 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:25:02,983 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:25:03,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:25:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:25:03,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 3981 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-16 16:25:03,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:25:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 143227 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 142602 trivial. 0 not checked. [2019-09-16 16:25:04,350 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:25:04,350 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 35 [2019-09-16 16:25:04,351 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-16 16:25:04,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-16 16:25:04,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=791, Unknown=0, NotChecked=0, Total=1190 [2019-09-16 16:25:04,352 INFO L87 Difference]: Start difference. First operand 3266 states and 4337 transitions. Second operand 35 states. [2019-09-16 16:25:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:25:08,009 INFO L93 Difference]: Finished difference Result 6977 states and 9258 transitions. [2019-09-16 16:25:08,010 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2019-09-16 16:25:08,010 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 1038 [2019-09-16 16:25:08,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:25:08,013 INFO L225 Difference]: With dead ends: 6977 [2019-09-16 16:25:08,013 INFO L226 Difference]: Without dead ends: 3768 [2019-09-16 16:25:08,017 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 1192 GetRequests, 1058 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5699 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5016, Invalid=13344, Unknown=0, NotChecked=0, Total=18360 [2019-09-16 16:25:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3768 states. [2019-09-16 16:25:08,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3768 to 3340. [2019-09-16 16:25:08,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3340 states. [2019-09-16 16:25:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 4435 transitions. [2019-09-16 16:25:08,444 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 4435 transitions. Word has length 1038 [2019-09-16 16:25:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:25:08,444 INFO L475 AbstractCegarLoop]: Abstraction has 3340 states and 4435 transitions. [2019-09-16 16:25:08,445 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-16 16:25:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 4435 transitions. [2019-09-16 16:25:08,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1113 [2019-09-16 16:25:08,454 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:25:08,454 INFO L407 BasicCegarLoop]: trace histogram [323, 323, 323, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:25:08,454 INFO L418 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:25:08,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:25:08,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1416944701, now seen corresponding path program 32 times [2019-09-16 16:25:08,455 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:25:08,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:25:08,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:25:08,457 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:25:08,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:25:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:25:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 165685 backedges. 113767 proven. 44895 refuted. 0 times theorem prover too weak. 7023 trivial. 0 not checked. [2019-09-16 16:25:11,624 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:25:11,624 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:25:12,028 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:25:12,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:25:12,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:25:12,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 4270 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-16 16:25:12,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:25:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 165685 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 165009 trivial. 0 not checked. [2019-09-16 16:25:14,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:25:14,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 29] total 110 [2019-09-16 16:25:14,147 INFO L454 AbstractCegarLoop]: Interpolant automaton has 110 states [2019-09-16 16:25:14,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2019-09-16 16:25:14,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1388, Invalid=10602, Unknown=0, NotChecked=0, Total=11990 [2019-09-16 16:25:14,148 INFO L87 Difference]: Start difference. First operand 3340 states and 4435 transitions. Second operand 110 states. [2019-09-16 16:25:47,816 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 12 [2019-09-16 16:26:06,007 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 15 [2019-09-16 16:26:20,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:26:20,082 INFO L93 Difference]: Finished difference Result 10622 states and 14156 transitions. [2019-09-16 16:26:20,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 836 states. [2019-09-16 16:26:20,083 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 1112 [2019-09-16 16:26:20,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:26:20,092 INFO L225 Difference]: With dead ends: 10622 [2019-09-16 16:26:20,092 INFO L226 Difference]: Without dead ends: 7341 [2019-09-16 16:26:20,135 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2023 GetRequests, 1086 SyntacticMatches, 0 SemanticMatches, 937 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352426 ImplicationChecksByTransitivity, 58.2s TimeCoverageRelationStatistics Valid=71110, Invalid=809672, Unknown=0, NotChecked=0, Total=880782 [2019-09-16 16:26:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7341 states. [2019-09-16 16:26:21,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7341 to 6685. [2019-09-16 16:26:21,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6685 states. [2019-09-16 16:26:21,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6685 states to 6685 states and 8896 transitions. [2019-09-16 16:26:21,016 INFO L78 Accepts]: Start accepts. Automaton has 6685 states and 8896 transitions. Word has length 1112 [2019-09-16 16:26:21,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:26:21,016 INFO L475 AbstractCegarLoop]: Abstraction has 6685 states and 8896 transitions. [2019-09-16 16:26:21,017 INFO L476 AbstractCegarLoop]: Interpolant automaton has 110 states. [2019-09-16 16:26:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 6685 states and 8896 transitions. [2019-09-16 16:26:21,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1118 [2019-09-16 16:26:21,033 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:26:21,034 INFO L407 BasicCegarLoop]: trace histogram [324, 324, 324, 27, 27, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:26:21,034 INFO L418 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:26:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:26:21,035 INFO L82 PathProgramCache]: Analyzing trace with hash 787782268, now seen corresponding path program 2 times [2019-09-16 16:26:21,035 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:26:21,035 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:26:21,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:26:21,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:26:21,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:26:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:26:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 166732 backedges. 22573 proven. 852 refuted. 0 times theorem prover too weak. 143307 trivial. 0 not checked. [2019-09-16 16:26:23,077 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:26:23,077 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:26:23,543 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:26:24,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:26:24,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:26:24,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 3316 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-16 16:26:24,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:26:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 166732 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 166003 trivial. 0 not checked. [2019-09-16 16:26:24,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:26:24,963 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2019-09-16 16:26:24,964 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-09-16 16:26:24,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-09-16 16:26:24,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=2480, Unknown=0, NotChecked=0, Total=3306 [2019-09-16 16:26:24,964 INFO L87 Difference]: Start difference. First operand 6685 states and 8896 transitions. Second operand 58 states.