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_copy7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:43:57,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:43:57,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:43:57,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 09:43:57,051 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 09:43:57,052 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 09:43:57,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 09:43:57,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 09:43:57,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 09:43:57,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 09:43:57,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 09:43:57,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 09:43:57,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:43:57,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:43:57,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:43:57,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:43:57,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:43:57,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:43:57,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:43:57,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:43:57,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:43:57,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:43:57,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:43:57,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:43:57,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 09:43:57,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 09:43:57,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 09:43:57,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 09:43:57,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 09:43:57,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 09:43:57,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 09:43:57,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 09:43:57,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 09:43:57,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:43:57,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:43:57,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:43:57,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-07 09:43:57,100 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:43:57,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:43:57,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:43:57,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:43:57,102 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:43:57,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:43:57,103 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:43:57,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:43:57,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:43:57,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:43:57,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:43:57,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:43:57,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:43:57,104 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:43:57,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:43:57,105 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:43:57,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:43:57,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:43:57,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:43:57,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:43:57,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:43:57,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:43:57,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:43:57,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:43:57,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:43:57,107 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:43:57,107 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:43:57,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:43:57,107 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:43:57,136 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:43:57,151 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:43:57,157 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:43:57,158 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:43:57,159 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:43:57,160 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i [2019-09-07 09:43:57,234 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccb5f052/6cabd74c6b4d4cbca78cfb704e9d8a15/FLAG89682b27b [2019-09-07 09:43:57,726 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:43:57,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i [2019-09-07 09:43:57,736 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccb5f052/6cabd74c6b4d4cbca78cfb704e9d8a15/FLAG89682b27b [2019-09-07 09:43:58,101 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dccb5f052/6cabd74c6b4d4cbca78cfb704e9d8a15 [2019-09-07 09:43:58,112 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:43:58,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:43:58,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:43:58,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:43:58,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:43:58,119 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:43:58" (1/1) ... [2019-09-07 09:43:58,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f766b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:43:58, skipping insertion in model container [2019-09-07 09:43:58,122 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:43:58" (1/1) ... [2019-09-07 09:43:58,130 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:43:58,149 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:43:58,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:43:58,322 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:43:58,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:43:58,466 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:43:58,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:43:58 WrapperNode [2019-09-07 09:43:58,467 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:43:58,468 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:43:58,468 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:43:58,468 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:43:58,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:43:58" (1/1) ... [2019-09-07 09:43:58,479 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:43:58" (1/1) ... [2019-09-07 09:43:58,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:43:58" (1/1) ... [2019-09-07 09:43:58,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:43:58" (1/1) ... [2019-09-07 09:43:58,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:43:58" (1/1) ... [2019-09-07 09:43:58,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:43:58" (1/1) ... [2019-09-07 09:43:58,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:43:58" (1/1) ... [2019-09-07 09:43:58,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:43:58,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:43:58,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:43:58,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:43:58,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:43:58" (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 [2019-09-07 09:43:58,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:43:58,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:43:58,585 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:43:58,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:43:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:43:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:43:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 09:43:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:43:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:43:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:43:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:43:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:43:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:43:58,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:43:59,012 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:43:59,013 INFO L283 CfgBuilder]: Removed 9 assume(true) statements. [2019-09-07 09:43:59,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:43:59 BoogieIcfgContainer [2019-09-07 09:43:59,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:43:59,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:43:59,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:43:59,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:43:59,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:43:58" (1/3) ... [2019-09-07 09:43:59,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d93171c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:43:59, skipping insertion in model container [2019-09-07 09:43:59,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:43:58" (2/3) ... [2019-09-07 09:43:59,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d93171c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:43:59, skipping insertion in model container [2019-09-07 09:43:59,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:43:59" (3/3) ... [2019-09-07 09:43:59,023 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-2.i [2019-09-07 09:43:59,031 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:43:59,038 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:43:59,054 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:43:59,087 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:43:59,088 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:43:59,088 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:43:59,088 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:43:59,088 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:43:59,089 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:43:59,089 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:43:59,089 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:43:59,089 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:43:59,109 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-09-07 09:43:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-07 09:43:59,117 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:59,118 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:59,120 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:59,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:59,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2029657296, now seen corresponding path program 1 times [2019-09-07 09:43:59,129 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:59,129 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:59,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:59,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:43:59,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:43:59,289 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:43:59,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:43:59,293 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:43:59,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:43:59,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:43:59,308 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2019-09-07 09:43:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:59,336 INFO L93 Difference]: Finished difference Result 82 states and 117 transitions. [2019-09-07 09:43:59,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:43:59,337 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 27 [2019-09-07 09:43:59,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:59,346 INFO L225 Difference]: With dead ends: 82 [2019-09-07 09:43:59,346 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 09:43:59,350 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:43:59,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 09:43:59,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-09-07 09:43:59,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-07 09:43:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-09-07 09:43:59,395 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2019-09-07 09:43:59,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:59,395 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-09-07 09:43:59,395 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:43:59,396 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-09-07 09:43:59,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-07 09:43:59,397 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:59,397 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:59,398 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:59,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:59,398 INFO L82 PathProgramCache]: Analyzing trace with hash -2073025378, now seen corresponding path program 1 times [2019-09-07 09:43:59,399 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:59,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:59,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:59,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:43:59,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:43:59,503 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:43:59,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:43:59,506 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:43:59,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:43:59,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:43:59,509 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 3 states. [2019-09-07 09:43:59,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:59,537 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2019-09-07 09:43:59,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:43:59,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-09-07 09:43:59,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:59,539 INFO L225 Difference]: With dead ends: 74 [2019-09-07 09:43:59,540 INFO L226 Difference]: Without dead ends: 42 [2019-09-07 09:43:59,541 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:43:59,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-07 09:43:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-09-07 09:43:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-07 09:43:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2019-09-07 09:43:59,550 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 27 [2019-09-07 09:43:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:59,550 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2019-09-07 09:43:59,550 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:43:59,551 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2019-09-07 09:43:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-07 09:43:59,552 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:59,552 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:59,553 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:59,553 INFO L82 PathProgramCache]: Analyzing trace with hash -55785284, now seen corresponding path program 1 times [2019-09-07 09:43:59,553 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:59,553 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:59,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:59,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:43:59,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:43:59,649 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:43:59,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:43:59,650 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:43:59,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:43:59,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:43:59,653 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 3 states. [2019-09-07 09:43:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:59,785 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2019-09-07 09:43:59,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:43:59,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-09-07 09:43:59,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:59,787 INFO L225 Difference]: With dead ends: 84 [2019-09-07 09:43:59,787 INFO L226 Difference]: Without dead ends: 55 [2019-09-07 09:43:59,788 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:43:59,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-07 09:43:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2019-09-07 09:43:59,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-07 09:43:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-09-07 09:43:59,797 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 29 [2019-09-07 09:43:59,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:59,797 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-09-07 09:43:59,797 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:43:59,797 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-09-07 09:43:59,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-07 09:43:59,799 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:59,799 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:59,799 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:59,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:59,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1132383374, now seen corresponding path program 1 times [2019-09-07 09:43:59,800 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:59,800 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:59,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:59,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:43:59,801 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:59,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-07 09:43:59,918 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:43:59,918 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:43:59,933 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:43:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:59,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:43:59,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-07 09:44:00,033 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:00,033 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:44:00,034 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:44:00,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:44:00,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:44:00,035 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 5 states. [2019-09-07 09:44:00,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:00,090 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-09-07 09:44:00,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:44:00,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2019-09-07 09:44:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:00,097 INFO L225 Difference]: With dead ends: 90 [2019-09-07 09:44:00,097 INFO L226 Difference]: Without dead ends: 51 [2019-09-07 09:44:00,098 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:44:00,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-07 09:44:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-09-07 09:44:00,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-07 09:44:00,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2019-09-07 09:44:00,111 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 43 [2019-09-07 09:44:00,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:00,111 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2019-09-07 09:44:00,111 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:44:00,111 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2019-09-07 09:44:00,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-07 09:44:00,113 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:00,113 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:00,113 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:00,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:00,114 INFO L82 PathProgramCache]: Analyzing trace with hash 165377196, now seen corresponding path program 2 times [2019-09-07 09:44:00,114 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:00,114 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:00,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:00,116 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:00,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-07 09:44:00,228 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:00,228 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:00,255 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:44:00,299 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:44:00,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:00,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:44:00,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-07 09:44:00,326 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:00,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:44:00,326 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:44:00,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:44:00,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:44:00,327 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 5 states. [2019-09-07 09:44:00,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:00,479 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2019-09-07 09:44:00,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:44:00,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2019-09-07 09:44:00,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:00,481 INFO L225 Difference]: With dead ends: 106 [2019-09-07 09:44:00,481 INFO L226 Difference]: Without dead ends: 71 [2019-09-07 09:44:00,482 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:44:00,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-09-07 09:44:00,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2019-09-07 09:44:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-07 09:44:00,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2019-09-07 09:44:00,491 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 45 [2019-09-07 09:44:00,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:00,491 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2019-09-07 09:44:00,491 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:44:00,491 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2019-09-07 09:44:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-07 09:44:00,493 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:00,493 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:00,494 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:00,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:00,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1415468158, now seen corresponding path program 3 times [2019-09-07 09:44:00,494 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:00,495 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:00,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:00,496 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:00,496 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-07 09:44:00,606 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:00,607 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:44:00,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:00,678 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:44:00,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:00,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:44:00,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-09-07 09:44:00,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:00,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-07 09:44:00,717 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:44:00,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:44:00,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:44:00,718 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 8 states. [2019-09-07 09:44:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:00,915 INFO L93 Difference]: Finished difference Result 141 states and 164 transitions. [2019-09-07 09:44:00,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:44:00,917 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2019-09-07 09:44:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:00,918 INFO L225 Difference]: With dead ends: 141 [2019-09-07 09:44:00,918 INFO L226 Difference]: Without dead ends: 88 [2019-09-07 09:44:00,919 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:44:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-07 09:44:00,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2019-09-07 09:44:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-07 09:44:00,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2019-09-07 09:44:00,929 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 59 [2019-09-07 09:44:00,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:00,932 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2019-09-07 09:44:00,932 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:44:00,933 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2019-09-07 09:44:00,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-09-07 09:44:00,934 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:00,934 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:00,935 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:00,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:00,935 INFO L82 PathProgramCache]: Analyzing trace with hash 412007534, now seen corresponding path program 4 times [2019-09-07 09:44:00,935 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:00,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:00,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:00,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:00,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-09-07 09:44:01,056 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:01,056 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:01,079 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:44:01,131 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:44:01,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:01,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:44:01,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:01,189 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-09-07 09:44:01,197 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:01,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-09-07 09:44:01,198 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:44:01,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:44:01,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:44:01,199 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 10 states. [2019-09-07 09:44:01,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:01,434 INFO L93 Difference]: Finished difference Result 171 states and 194 transitions. [2019-09-07 09:44:01,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 09:44:01,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2019-09-07 09:44:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:01,438 INFO L225 Difference]: With dead ends: 171 [2019-09-07 09:44:01,438 INFO L226 Difference]: Without dead ends: 104 [2019-09-07 09:44:01,440 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:44:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-07 09:44:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2019-09-07 09:44:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-07 09:44:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2019-09-07 09:44:01,458 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 75 [2019-09-07 09:44:01,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:01,459 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2019-09-07 09:44:01,459 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:44:01,459 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2019-09-07 09:44:01,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-07 09:44:01,465 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:01,465 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:01,466 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:01,466 INFO L82 PathProgramCache]: Analyzing trace with hash -175111074, now seen corresponding path program 5 times [2019-09-07 09:44:01,466 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:01,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:01,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:01,467 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:01,468 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-09-07 09:44:01,598 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:01,599 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:44:01,615 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:19,049 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-09-07 09:44:19,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:19,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:44:19,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:19,143 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-09-07 09:44:19,156 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:19,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-07 09:44:19,157 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 09:44:19,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 09:44:19,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:44:19,158 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 12 states. [2019-09-07 09:44:19,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:19,400 INFO L93 Difference]: Finished difference Result 201 states and 224 transitions. [2019-09-07 09:44:19,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:44:19,401 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2019-09-07 09:44:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:19,404 INFO L225 Difference]: With dead ends: 201 [2019-09-07 09:44:19,404 INFO L226 Difference]: Without dead ends: 120 [2019-09-07 09:44:19,406 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-09-07 09:44:19,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-09-07 09:44:19,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2019-09-07 09:44:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-09-07 09:44:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2019-09-07 09:44:19,426 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 91 [2019-09-07 09:44:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:19,427 INFO L475 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2019-09-07 09:44:19,427 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 09:44:19,430 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2019-09-07 09:44:19,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-07 09:44:19,432 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:19,432 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:19,435 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:19,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:19,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1424108622, now seen corresponding path program 6 times [2019-09-07 09:44:19,436 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:19,436 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:19,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:19,437 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:19,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2019-09-07 09:44:19,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:19,594 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:19,607 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:44:23,340 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-09-07 09:44:23,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:23,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:44:23,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2019-09-07 09:44:23,452 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:23,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-09-07 09:44:23,453 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 09:44:23,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 09:44:23,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:44:23,457 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 14 states. [2019-09-07 09:44:23,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:23,775 INFO L93 Difference]: Finished difference Result 231 states and 254 transitions. [2019-09-07 09:44:23,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:44:23,776 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 107 [2019-09-07 09:44:23,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:23,777 INFO L225 Difference]: With dead ends: 231 [2019-09-07 09:44:23,778 INFO L226 Difference]: Without dead ends: 136 [2019-09-07 09:44:23,778 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-09-07 09:44:23,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-09-07 09:44:23,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2019-09-07 09:44:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-09-07 09:44:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2019-09-07 09:44:23,800 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 107 [2019-09-07 09:44:23,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:23,800 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2019-09-07 09:44:23,800 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 09:44:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2019-09-07 09:44:23,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-09-07 09:44:23,804 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:23,804 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:23,805 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1543162818, now seen corresponding path program 7 times [2019-09-07 09:44:23,807 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:23,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:23,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:23,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:23,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-09-07 09:44:23,934 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:23,934 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:44:23,953 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:24,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:44:24,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (8)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:44:24,053 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:24,054 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 09:44:24,054 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:44:24,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:44:24,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:44:24,055 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand 10 states. [2019-09-07 09:44:24,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:24,090 INFO L93 Difference]: Finished difference Result 240 states and 256 transitions. [2019-09-07 09:44:24,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 09:44:24,090 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 123 [2019-09-07 09:44:24,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:24,092 INFO L225 Difference]: With dead ends: 240 [2019-09-07 09:44:24,092 INFO L226 Difference]: Without dead ends: 131 [2019-09-07 09:44:24,093 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:44:24,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-09-07 09:44:24,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-09-07 09:44:24,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-09-07 09:44:24,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 138 transitions. [2019-09-07 09:44:24,117 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 138 transitions. Word has length 123 [2019-09-07 09:44:24,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:24,117 INFO L475 AbstractCegarLoop]: Abstraction has 130 states and 138 transitions. [2019-09-07 09:44:24,117 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:44:24,118 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 138 transitions. [2019-09-07 09:44:24,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-07 09:44:24,119 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:24,119 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:24,119 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:24,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1091170396, now seen corresponding path program 8 times [2019-09-07 09:44:24,120 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:24,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:24,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:24,122 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:44:24,122 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2019-09-07 09:44:24,252 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:24,252 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:24,263 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:44:24,328 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:44:24,328 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:24,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:44:24,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:44:24,437 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:24,438 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2019-09-07 09:44:24,438 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 09:44:24,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 09:44:24,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:44:24,439 INFO L87 Difference]: Start difference. First operand 130 states and 138 transitions. Second operand 17 states. [2019-09-07 09:44:24,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:24,755 INFO L93 Difference]: Finished difference Result 263 states and 286 transitions. [2019-09-07 09:44:24,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-07 09:44:24,762 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 125 [2019-09-07 09:44:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:24,764 INFO L225 Difference]: With dead ends: 263 [2019-09-07 09:44:24,764 INFO L226 Difference]: Without dead ends: 154 [2019-09-07 09:44:24,765 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:44:24,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-09-07 09:44:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 146. [2019-09-07 09:44:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-09-07 09:44:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 154 transitions. [2019-09-07 09:44:24,771 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 154 transitions. Word has length 125 [2019-09-07 09:44:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:24,771 INFO L475 AbstractCegarLoop]: Abstraction has 146 states and 154 transitions. [2019-09-07 09:44:24,771 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 09:44:24,772 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 154 transitions. [2019-09-07 09:44:24,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-09-07 09:44:24,773 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:24,773 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:24,774 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:24,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:24,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1670521780, now seen corresponding path program 9 times [2019-09-07 09:44:24,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:24,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:24,777 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:24,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:24,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:24,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2019-09-07 09:44:24,943 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:24,943 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:44:24,980 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:40,518 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-09-07 09:44:40,518 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:40,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-07 09:44:40,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 13 proven. 49 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:44:40,594 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:40,594 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2019-09-07 09:44:40,594 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 09:44:40,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 09:44:40,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 09:44:40,595 INFO L87 Difference]: Start difference. First operand 146 states and 154 transitions. Second operand 13 states. [2019-09-07 09:44:40,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:40,892 INFO L93 Difference]: Finished difference Result 281 states and 309 transitions. [2019-09-07 09:44:40,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 09:44:40,893 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 141 [2019-09-07 09:44:40,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:40,895 INFO L225 Difference]: With dead ends: 281 [2019-09-07 09:44:40,896 INFO L226 Difference]: Without dead ends: 174 [2019-09-07 09:44:40,897 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-09-07 09:44:40,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-09-07 09:44:40,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2019-09-07 09:44:40,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-09-07 09:44:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 182 transitions. [2019-09-07 09:44:40,907 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 182 transitions. Word has length 141 [2019-09-07 09:44:40,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:40,907 INFO L475 AbstractCegarLoop]: Abstraction has 174 states and 182 transitions. [2019-09-07 09:44:40,907 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 09:44:40,908 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 182 transitions. [2019-09-07 09:44:40,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-09-07 09:44:40,909 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:40,909 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:40,910 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:40,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:40,910 INFO L82 PathProgramCache]: Analyzing trace with hash -991472528, now seen corresponding path program 10 times [2019-09-07 09:44:40,910 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:40,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:40,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:40,912 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:40,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2019-09-07 09:44:41,097 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:41,097 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:44:41,116 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:44:41,196 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:44:41,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:44:41,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 09:44:41,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:44:41,359 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2019-09-07 09:44:41,363 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:44:41,363 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2019-09-07 09:44:41,364 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:44:41,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:44:41,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:44:41,365 INFO L87 Difference]: Start difference. First operand 174 states and 182 transitions. Second operand 21 states. [2019-09-07 09:44:41,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:44:41,797 INFO L93 Difference]: Finished difference Result 349 states and 372 transitions. [2019-09-07 09:44:41,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:44:41,798 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 169 [2019-09-07 09:44:41,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:44:41,799 INFO L225 Difference]: With dead ends: 349 [2019-09-07 09:44:41,800 INFO L226 Difference]: Without dead ends: 198 [2019-09-07 09:44:41,801 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:44:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2019-09-07 09:44:41,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 190. [2019-09-07 09:44:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-09-07 09:44:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 198 transitions. [2019-09-07 09:44:41,809 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 198 transitions. Word has length 169 [2019-09-07 09:44:41,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:44:41,809 INFO L475 AbstractCegarLoop]: Abstraction has 190 states and 198 transitions. [2019-09-07 09:44:41,809 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:44:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 198 transitions. [2019-09-07 09:44:41,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-09-07 09:44:41,811 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:44:41,811 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:44:41,811 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:44:41,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:44:41,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2059720800, now seen corresponding path program 11 times [2019-09-07 09:44:41,812 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:44:41,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:44:41,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:41,813 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:44:41,813 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:44:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:44:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2019-09-07 09:44:41,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:44:41,970 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:44:41,997 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:46:19,318 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-09-07 09:46:19,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:46:19,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:46:19,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:46:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2019-09-07 09:46:19,613 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:46:19,613 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2019-09-07 09:46:19,614 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:46:19,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:46:19,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:46:19,615 INFO L87 Difference]: Start difference. First operand 190 states and 198 transitions. Second operand 23 states. [2019-09-07 09:46:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:46:20,118 INFO L93 Difference]: Finished difference Result 379 states and 402 transitions. [2019-09-07 09:46:20,119 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:46:20,119 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 185 [2019-09-07 09:46:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:46:20,121 INFO L225 Difference]: With dead ends: 379 [2019-09-07 09:46:20,122 INFO L226 Difference]: Without dead ends: 214 [2019-09-07 09:46:20,123 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:46:20,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2019-09-07 09:46:20,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 206. [2019-09-07 09:46:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-09-07 09:46:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 214 transitions. [2019-09-07 09:46:20,130 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 214 transitions. Word has length 185 [2019-09-07 09:46:20,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:46:20,131 INFO L475 AbstractCegarLoop]: Abstraction has 206 states and 214 transitions. [2019-09-07 09:46:20,131 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:46:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 214 transitions. [2019-09-07 09:46:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-09-07 09:46:20,134 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:46:20,134 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:46:20,134 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:46:20,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:46:20,135 INFO L82 PathProgramCache]: Analyzing trace with hash 175848528, now seen corresponding path program 12 times [2019-09-07 09:46:20,135 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:46:20,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:46:20,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:20,136 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:46:20,136 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:46:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2019-09-07 09:46:20,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:46:20,297 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:46:20,311 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:47:34,582 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2019-09-07 09:47:34,583 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:47:34,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:47:34,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2019-09-07 09:47:34,818 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:34,818 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2019-09-07 09:47:34,819 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:47:34,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:47:34,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:47:34,820 INFO L87 Difference]: Start difference. First operand 206 states and 214 transitions. Second operand 25 states. [2019-09-07 09:47:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:35,262 INFO L93 Difference]: Finished difference Result 409 states and 432 transitions. [2019-09-07 09:47:35,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 09:47:35,265 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 201 [2019-09-07 09:47:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:35,267 INFO L225 Difference]: With dead ends: 409 [2019-09-07 09:47:35,267 INFO L226 Difference]: Without dead ends: 230 [2019-09-07 09:47:35,268 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:47:35,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-09-07 09:47:35,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 222. [2019-09-07 09:47:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-09-07 09:47:35,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 230 transitions. [2019-09-07 09:47:35,276 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 230 transitions. Word has length 201 [2019-09-07 09:47:35,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:35,277 INFO L475 AbstractCegarLoop]: Abstraction has 222 states and 230 transitions. [2019-09-07 09:47:35,277 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:47:35,277 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 230 transitions. [2019-09-07 09:47:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-09-07 09:47:35,280 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:35,280 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:35,280 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:35,281 INFO L82 PathProgramCache]: Analyzing trace with hash -376799168, now seen corresponding path program 13 times [2019-09-07 09:47:35,281 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:35,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:35,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:35,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:47:35,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2019-09-07 09:47:35,494 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:35,494 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:47:35,521 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:35,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:47:35,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2019-09-07 09:47:35,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:35,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 09:47:35,667 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:47:35,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:47:35,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:47:35,669 INFO L87 Difference]: Start difference. First operand 222 states and 230 transitions. Second operand 15 states. [2019-09-07 09:47:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:35,721 INFO L93 Difference]: Finished difference Result 418 states and 434 transitions. [2019-09-07 09:47:35,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:47:35,721 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 217 [2019-09-07 09:47:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:35,723 INFO L225 Difference]: With dead ends: 418 [2019-09-07 09:47:35,723 INFO L226 Difference]: Without dead ends: 225 [2019-09-07 09:47:35,725 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:47:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2019-09-07 09:47:35,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2019-09-07 09:47:35,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2019-09-07 09:47:35,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 232 transitions. [2019-09-07 09:47:35,745 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 232 transitions. Word has length 217 [2019-09-07 09:47:35,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:35,745 INFO L475 AbstractCegarLoop]: Abstraction has 224 states and 232 transitions. [2019-09-07 09:47:35,745 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:47:35,746 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 232 transitions. [2019-09-07 09:47:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-09-07 09:47:35,747 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:35,747 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:35,748 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:35,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:35,748 INFO L82 PathProgramCache]: Analyzing trace with hash 385467358, now seen corresponding path program 14 times [2019-09-07 09:47:35,748 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:35,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:35,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:35,749 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:47:35,749 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2019-09-07 09:47:35,987 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:35,987 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:47:36,001 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:36,100 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:47:36,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:47:36,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 09:47:36,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:47:36,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2019-09-07 09:47:36,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:47:36,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 09:47:36,176 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:47:36,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:47:36,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:47:36,176 INFO L87 Difference]: Start difference. First operand 224 states and 232 transitions. Second operand 16 states. [2019-09-07 09:47:36,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:47:36,245 INFO L93 Difference]: Finished difference Result 420 states and 436 transitions. [2019-09-07 09:47:36,246 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:47:36,246 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 219 [2019-09-07 09:47:36,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:47:36,248 INFO L225 Difference]: With dead ends: 420 [2019-09-07 09:47:36,248 INFO L226 Difference]: Without dead ends: 227 [2019-09-07 09:47:36,249 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:47:36,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2019-09-07 09:47:36,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2019-09-07 09:47:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-09-07 09:47:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 234 transitions. [2019-09-07 09:47:36,257 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 234 transitions. Word has length 219 [2019-09-07 09:47:36,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:47:36,257 INFO L475 AbstractCegarLoop]: Abstraction has 226 states and 234 transitions. [2019-09-07 09:47:36,257 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:47:36,257 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 234 transitions. [2019-09-07 09:47:36,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-09-07 09:47:36,259 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:47:36,259 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:47:36,260 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:47:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:47:36,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1515808772, now seen corresponding path program 15 times [2019-09-07 09:47:36,260 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:47:36,260 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:47:36,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:36,261 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:47:36,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:47:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:47:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1033 trivial. 0 not checked. [2019-09-07 09:47:36,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:47:36,487 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:47:36,523 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:48:47,035 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2019-09-07 09:48:47,035 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:48:47,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 09:48:47,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1033 trivial. 0 not checked. [2019-09-07 09:48:47,154 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:47,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-07 09:48:47,155 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 09:48:47,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 09:48:47,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:48:47,156 INFO L87 Difference]: Start difference. First operand 226 states and 234 transitions. Second operand 16 states. [2019-09-07 09:48:47,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:47,648 INFO L93 Difference]: Finished difference Result 414 states and 435 transitions. [2019-09-07 09:48:47,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:48:47,652 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 221 [2019-09-07 09:48:47,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:47,654 INFO L225 Difference]: With dead ends: 414 [2019-09-07 09:48:47,654 INFO L226 Difference]: Without dead ends: 247 [2019-09-07 09:48:47,655 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-09-07 09:48:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2019-09-07 09:48:47,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 240. [2019-09-07 09:48:47,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2019-09-07 09:48:47,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 248 transitions. [2019-09-07 09:48:47,667 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 248 transitions. Word has length 221 [2019-09-07 09:48:47,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:47,667 INFO L475 AbstractCegarLoop]: Abstraction has 240 states and 248 transitions. [2019-09-07 09:48:47,668 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 09:48:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 248 transitions. [2019-09-07 09:48:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-09-07 09:48:47,670 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:47,671 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:47,671 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:47,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:47,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1054010318, now seen corresponding path program 16 times [2019-09-07 09:48:47,672 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:47,672 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:47,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:47,673 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:48:47,673 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2019-09-07 09:48:48,060 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:48,061 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:48:48,084 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:48:48,231 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:48:48,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:48:48,235 INFO L256 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 09:48:48,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:48:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2019-09-07 09:48:48,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:48:48,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-07 09:48:48,345 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-07 09:48:48,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-07 09:48:48,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:48:48,346 INFO L87 Difference]: Start difference. First operand 240 states and 248 transitions. Second operand 17 states. [2019-09-07 09:48:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:48:48,412 INFO L93 Difference]: Finished difference Result 450 states and 466 transitions. [2019-09-07 09:48:48,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 09:48:48,413 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 235 [2019-09-07 09:48:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:48:48,414 INFO L225 Difference]: With dead ends: 450 [2019-09-07 09:48:48,414 INFO L226 Difference]: Without dead ends: 243 [2019-09-07 09:48:48,415 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-09-07 09:48:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2019-09-07 09:48:48,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2019-09-07 09:48:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2019-09-07 09:48:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 250 transitions. [2019-09-07 09:48:48,424 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 250 transitions. Word has length 235 [2019-09-07 09:48:48,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:48:48,424 INFO L475 AbstractCegarLoop]: Abstraction has 242 states and 250 transitions. [2019-09-07 09:48:48,424 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-07 09:48:48,424 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 250 transitions. [2019-09-07 09:48:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-09-07 09:48:48,426 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:48:48,426 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:48:48,427 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:48:48,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:48:48,427 INFO L82 PathProgramCache]: Analyzing trace with hash 356500460, now seen corresponding path program 17 times [2019-09-07 09:48:48,427 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:48:48,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:48:48,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:48,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:48:48,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:48:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:48:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2019-09-07 09:48:48,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:48:48,762 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:48:48,787 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:51:01,646 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-09-07 09:51:01,646 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:51:01,736 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 09:51:01,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:51:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2019-09-07 09:51:02,019 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:51:02,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2019-09-07 09:51:02,020 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 09:51:02,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 09:51:02,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:51:02,021 INFO L87 Difference]: Start difference. First operand 242 states and 250 transitions. Second operand 31 states. [2019-09-07 09:51:02,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:51:02,571 INFO L93 Difference]: Finished difference Result 473 states and 496 transitions. [2019-09-07 09:51:02,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 09:51:02,571 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 237 [2019-09-07 09:51:02,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:51:02,573 INFO L225 Difference]: With dead ends: 473 [2019-09-07 09:51:02,573 INFO L226 Difference]: Without dead ends: 266 [2019-09-07 09:51:02,574 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 09:51:02,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-09-07 09:51:02,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 258. [2019-09-07 09:51:02,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2019-09-07 09:51:02,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 266 transitions. [2019-09-07 09:51:02,586 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 266 transitions. Word has length 237 [2019-09-07 09:51:02,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:51:02,586 INFO L475 AbstractCegarLoop]: Abstraction has 258 states and 266 transitions. [2019-09-07 09:51:02,586 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 09:51:02,586 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 266 transitions. [2019-09-07 09:51:02,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-09-07 09:51:02,588 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:51:02,588 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:51:02,588 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:51:02,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:51:02,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1742614564, now seen corresponding path program 18 times [2019-09-07 09:51:02,589 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:51:02,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:51:02,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:02,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:51:02,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:51:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:51:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2019-09-07 09:51:02,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:51:02,894 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:51:02,923 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:52:59,804 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-09-07 09:52:59,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:52:59,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 144 conjunts are in the unsatisfiable core [2019-09-07 09:52:59,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:52:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1597 backedges. 191 proven. 196 refuted. 0 times theorem prover too weak. 1210 trivial. 0 not checked. [2019-09-07 09:52:59,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:52:59,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 22 [2019-09-07 09:52:59,987 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:52:59,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:52:59,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:52:59,988 INFO L87 Difference]: Start difference. First operand 258 states and 266 transitions. Second operand 22 states. [2019-09-07 09:53:00,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:53:00,817 INFO L93 Difference]: Finished difference Result 477 states and 505 transitions. [2019-09-07 09:53:00,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:53:00,818 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 253 [2019-09-07 09:53:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:53:00,821 INFO L225 Difference]: With dead ends: 477 [2019-09-07 09:53:00,821 INFO L226 Difference]: Without dead ends: 286 [2019-09-07 09:53:00,822 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=536, Invalid=946, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 09:53:00,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-09-07 09:53:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2019-09-07 09:53:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2019-09-07 09:53:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 294 transitions. [2019-09-07 09:53:00,834 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 294 transitions. Word has length 253 [2019-09-07 09:53:00,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:53:00,834 INFO L475 AbstractCegarLoop]: Abstraction has 286 states and 294 transitions. [2019-09-07 09:53:00,834 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:53:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 294 transitions. [2019-09-07 09:53:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-09-07 09:53:00,836 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:53:00,836 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:53:00,837 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:53:00,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:53:00,837 INFO L82 PathProgramCache]: Analyzing trace with hash 960516096, now seen corresponding path program 19 times [2019-09-07 09:53:00,837 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:53:00,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:53:00,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:53:00,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:53:00,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:53:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:53:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2017 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1792 trivial. 0 not checked. [2019-09-07 09:53:01,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:53:01,183 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:53:01,197 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:53:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:53:01,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 09:53:01,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:53:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2017 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1792 trivial. 0 not checked. [2019-09-07 09:53:01,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:53:01,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-07 09:53:01,432 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:53:01,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:53:01,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:53:01,433 INFO L87 Difference]: Start difference. First operand 286 states and 294 transitions. Second operand 19 states. [2019-09-07 09:53:01,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:53:01,510 INFO L93 Difference]: Finished difference Result 538 states and 554 transitions. [2019-09-07 09:53:01,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-07 09:53:01,511 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 281 [2019-09-07 09:53:01,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:53:01,513 INFO L225 Difference]: With dead ends: 538 [2019-09-07 09:53:01,513 INFO L226 Difference]: Without dead ends: 289 [2019-09-07 09:53:01,514 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:53:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2019-09-07 09:53:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2019-09-07 09:53:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2019-09-07 09:53:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 296 transitions. [2019-09-07 09:53:01,545 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 296 transitions. Word has length 281 [2019-09-07 09:53:01,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:53:01,546 INFO L475 AbstractCegarLoop]: Abstraction has 288 states and 296 transitions. [2019-09-07 09:53:01,546 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:53:01,546 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 296 transitions. [2019-09-07 09:53:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2019-09-07 09:53:01,549 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:53:01,550 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:53:01,550 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:53:01,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:53:01,550 INFO L82 PathProgramCache]: Analyzing trace with hash -2025610338, now seen corresponding path program 20 times [2019-09-07 09:53:01,551 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:53:01,551 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:53:01,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:53:01,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:53:01,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:53:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:53:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1792 trivial. 0 not checked. [2019-09-07 09:53:02,030 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:53:02,031 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:53:02,072 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:53:02,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:53:02,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:53:02,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:53:02,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:53:02,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2048 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1792 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (21)] Exception during sending of exit command (exit): Stream closed [2019-09-07 09:53:02,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:53:02,343 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 09:53:02,343 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:53:02,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:53:02,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:53:02,344 INFO L87 Difference]: Start difference. First operand 288 states and 296 transitions. Second operand 20 states. [2019-09-07 09:53:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:53:02,408 INFO L93 Difference]: Finished difference Result 540 states and 556 transitions. [2019-09-07 09:53:02,408 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:53:02,409 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 283 [2019-09-07 09:53:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:53:02,411 INFO L225 Difference]: With dead ends: 540 [2019-09-07 09:53:02,411 INFO L226 Difference]: Without dead ends: 291 [2019-09-07 09:53:02,412 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:53:02,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2019-09-07 09:53:02,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2019-09-07 09:53:02,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2019-09-07 09:53:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 298 transitions. [2019-09-07 09:53:02,424 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 298 transitions. Word has length 283 [2019-09-07 09:53:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:53:02,425 INFO L475 AbstractCegarLoop]: Abstraction has 290 states and 298 transitions. [2019-09-07 09:53:02,425 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:53:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 298 transitions. [2019-09-07 09:53:02,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-09-07 09:53:02,427 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:53:02,427 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:53:02,427 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:53:02,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:53:02,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1640007612, now seen corresponding path program 21 times [2019-09-07 09:53:02,428 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:53:02,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:53:02,428 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:53:02,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:53:02,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:53:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:53:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1825 trivial. 0 not checked. [2019-09-07 09:53:02,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:53:02,738 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:53:02,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:55:08,682 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2019-09-07 09:55:08,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:55:08,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-07 09:55:08,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:55:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 95 proven. 256 refuted. 0 times theorem prover too weak. 1730 trivial. 0 not checked. [2019-09-07 09:55:08,897 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:55:08,897 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 24 [2019-09-07 09:55:08,897 INFO L454 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-09-07 09:55:08,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-09-07 09:55:08,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2019-09-07 09:55:08,898 INFO L87 Difference]: Start difference. First operand 290 states and 298 transitions. Second operand 24 states. [2019-09-07 09:55:09,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:55:09,796 INFO L93 Difference]: Finished difference Result 533 states and 561 transitions. [2019-09-07 09:55:09,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:55:09,796 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 285 [2019-09-07 09:55:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:55:09,799 INFO L225 Difference]: With dead ends: 533 [2019-09-07 09:55:09,799 INFO L226 Difference]: Without dead ends: 318 [2019-09-07 09:55:09,802 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=655, Invalid=1151, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 09:55:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-09-07 09:55:09,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2019-09-07 09:55:09,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2019-09-07 09:55:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 326 transitions. [2019-09-07 09:55:09,816 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 326 transitions. Word has length 285 [2019-09-07 09:55:09,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:55:09,816 INFO L475 AbstractCegarLoop]: Abstraction has 318 states and 326 transitions. [2019-09-07 09:55:09,816 INFO L476 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-09-07 09:55:09,816 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 326 transitions. [2019-09-07 09:55:09,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2019-09-07 09:55:09,818 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:55:09,819 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:55:09,819 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:55:09,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:55:09,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1378908128, now seen corresponding path program 22 times [2019-09-07 09:55:09,820 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:55:09,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:55:09,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:55:09,820 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:55:09,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:55:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:55:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2557 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2019-09-07 09:55:10,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:55:10,217 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:55:10,240 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:55:10,371 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:55:10,372 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:55:10,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:55:10,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:55:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2557 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2233 trivial. 0 not checked. [2019-09-07 09:55:10,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:55:10,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2019-09-07 09:55:10,946 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-07 09:55:10,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-07 09:55:10,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 09:55:10,947 INFO L87 Difference]: Start difference. First operand 318 states and 326 transitions. Second operand 39 states. [2019-09-07 09:55:11,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:55:11,776 INFO L93 Difference]: Finished difference Result 619 states and 642 transitions. [2019-09-07 09:55:11,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-09-07 09:55:11,782 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 313 [2019-09-07 09:55:11,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:55:11,784 INFO L225 Difference]: With dead ends: 619 [2019-09-07 09:55:11,785 INFO L226 Difference]: Without dead ends: 342 [2019-09-07 09:55:11,786 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 295 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 09:55:11,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2019-09-07 09:55:11,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 334. [2019-09-07 09:55:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2019-09-07 09:55:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 342 transitions. [2019-09-07 09:55:11,798 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 342 transitions. Word has length 313 [2019-09-07 09:55:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:55:11,798 INFO L475 AbstractCegarLoop]: Abstraction has 334 states and 342 transitions. [2019-09-07 09:55:11,798 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-07 09:55:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 342 transitions. [2019-09-07 09:55:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2019-09-07 09:55:11,800 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:55:11,801 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:55:11,801 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:55:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:55:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash -2035426352, now seen corresponding path program 23 times [2019-09-07 09:55:11,801 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:55:11,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:55:11,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:55:11,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:55:11,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:55:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:55:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2527 trivial. 0 not checked. [2019-09-07 09:55:12,225 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:55:12,225 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:55:12,311 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:58:28,771 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-09-07 09:58:28,771 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:58:28,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 757 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 09:58:28,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:58:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2851 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2490 trivial. 0 not checked. [2019-09-07 09:58:29,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:58:29,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2019-09-07 09:58:29,382 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-07 09:58:29,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-07 09:58:29,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 09:58:29,384 INFO L87 Difference]: Start difference. First operand 334 states and 342 transitions. Second operand 41 states. [2019-09-07 09:58:30,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:58:30,288 INFO L93 Difference]: Finished difference Result 649 states and 672 transitions. [2019-09-07 09:58:30,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-07 09:58:30,288 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 329 [2019-09-07 09:58:30,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:58:30,290 INFO L225 Difference]: With dead ends: 649 [2019-09-07 09:58:30,290 INFO L226 Difference]: Without dead ends: 358 [2019-09-07 09:58:30,292 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 09:58:30,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2019-09-07 09:58:30,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 350. [2019-09-07 09:58:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2019-09-07 09:58:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 358 transitions. [2019-09-07 09:58:30,305 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 358 transitions. Word has length 329 [2019-09-07 09:58:30,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:58:30,305 INFO L475 AbstractCegarLoop]: Abstraction has 350 states and 358 transitions. [2019-09-07 09:58:30,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-07 09:58:30,306 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 358 transitions. [2019-09-07 09:58:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2019-09-07 09:58:30,309 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:58:30,310 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:58:30,310 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:58:30,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:58:30,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1183064000, now seen corresponding path program 24 times [2019-09-07 09:58:30,311 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:58:30,311 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:58:30,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:58:30,312 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:58:30,313 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:58:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:58:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3161 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2800 trivial. 0 not checked. [2019-09-07 09:58:30,862 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:58:30,862 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:58:30,887 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE