java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:04:06,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:04:06,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:04:06,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:04:06,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:04:06,246 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:04:06,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:04:06,249 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:04:06,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:04:06,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:04:06,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:04:06,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:04:06,254 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:04:06,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:04:06,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:04:06,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:04:06,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:04:06,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:04:06,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:04:06,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:04:06,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:04:06,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:04:06,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:04:06,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:04:06,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:04:06,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 20:04:06,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 20:04:06,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 20:04:06,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 20:04:06,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 20:04:06,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 20:04:06,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 20:04:06,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 20:04:06,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:04:06,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:04:06,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:04:06,282 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-03 20:04:06,312 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:04:06,312 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:04:06,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:04:06,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:04:06,315 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:04:06,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:04:06,315 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:04:06,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:04:06,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:04:06,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:04:06,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:04:06,317 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:04:06,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:04:06,318 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:04:06,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:04:06,318 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:04:06,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:04:06,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:04:06,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:04:06,319 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:04:06,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:04:06,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:04:06,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:04:06,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:04:06,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:04:06,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:04:06,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:04:06,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:04:06,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:04:06,369 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:04:06,388 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:04:06,392 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:04:06,393 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:04:06,394 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:04:06,394 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2019-09-03 20:04:06,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/404c3dc41/8f7f52568eca4968a6fa7be4b47243e6/FLAG98d616878 [2019-09-03 20:04:06,908 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:04:06,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-1.c [2019-09-03 20:04:06,916 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/404c3dc41/8f7f52568eca4968a6fa7be4b47243e6/FLAG98d616878 [2019-09-03 20:04:07,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/404c3dc41/8f7f52568eca4968a6fa7be4b47243e6 [2019-09-03 20:04:07,314 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:04:07,316 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:04:07,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:04:07,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:04:07,321 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:04:07,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:04:07" (1/1) ... [2019-09-03 20:04:07,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d26225c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:07, skipping insertion in model container [2019-09-03 20:04:07,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:04:07" (1/1) ... [2019-09-03 20:04:07,333 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:04:07,349 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:04:07,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:04:07,509 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:04:07,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:04:07,536 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:04:07,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:07 WrapperNode [2019-09-03 20:04:07,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:04:07,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:04:07,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:04:07,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:04:07,644 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:07" (1/1) ... [2019-09-03 20:04:07,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:07" (1/1) ... [2019-09-03 20:04:07,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:07" (1/1) ... [2019-09-03 20:04:07,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:07" (1/1) ... [2019-09-03 20:04:07,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:07" (1/1) ... [2019-09-03 20:04:07,658 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:07" (1/1) ... [2019-09-03 20:04:07,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:07" (1/1) ... [2019-09-03 20:04:07,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:04:07,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:04:07,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:04:07,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:04:07,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:04:07,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:04:07,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:04:07,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:04:07,708 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:04:07,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:04:07,708 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:04:07,708 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:04:07,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:04:07,708 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:04:07,866 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:04:07,866 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:04:07,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:04:07 BoogieIcfgContainer [2019-09-03 20:04:07,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:04:07,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:04:07,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:04:07,874 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:04:07,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:04:07" (1/3) ... [2019-09-03 20:04:07,876 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d21975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:04:07, skipping insertion in model container [2019-09-03 20:04:07,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:07" (2/3) ... [2019-09-03 20:04:07,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d21975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:04:07, skipping insertion in model container [2019-09-03 20:04:07,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:04:07" (3/3) ... [2019-09-03 20:04:07,881 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono1_1-1.c [2019-09-03 20:04:07,890 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:04:07,897 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:04:07,915 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:04:07,954 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:04:07,954 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:04:07,954 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:04:07,954 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:04:07,955 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:04:07,955 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:04:07,955 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:04:07,955 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:04:07,955 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:04:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-09-03 20:04:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:04:07,977 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:07,977 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:07,979 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:07,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:07,983 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-09-03 20:04:07,985 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:07,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:08,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:08,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:08,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:08,087 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:04:08,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:04:08,091 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:04:08,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:04:08,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:04:08,103 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-09-03 20:04:08,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:08,120 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2019-09-03 20:04:08,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:04:08,122 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 20:04:08,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:08,130 INFO L225 Difference]: With dead ends: 29 [2019-09-03 20:04:08,130 INFO L226 Difference]: Without dead ends: 12 [2019-09-03 20:04:08,134 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:04:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-03 20:04:08,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-03 20:04:08,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-03 20:04:08,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-09-03 20:04:08,179 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2019-09-03 20:04:08,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:08,180 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-09-03 20:04:08,180 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:04:08,181 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-09-03 20:04:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:04:08,182 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:08,182 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:08,183 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:08,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:08,185 INFO L82 PathProgramCache]: Analyzing trace with hash -730736584, now seen corresponding path program 1 times [2019-09-03 20:04:08,185 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:08,185 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:08,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:08,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:08,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:08,481 WARN L188 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2019-09-03 20:04:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:08,488 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:04:08,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 20:04:08,490 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 20:04:08,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 20:04:08,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:04:08,491 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2019-09-03 20:04:08,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:08,519 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2019-09-03 20:04:08,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 20:04:08,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-03 20:04:08,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:08,521 INFO L225 Difference]: With dead ends: 21 [2019-09-03 20:04:08,521 INFO L226 Difference]: Without dead ends: 14 [2019-09-03 20:04:08,522 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:04:08,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-03 20:04:08,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-03 20:04:08,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-03 20:04:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-09-03 20:04:08,527 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-09-03 20:04:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:08,528 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-09-03 20:04:08,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 20:04:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-09-03 20:04:08,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-03 20:04:08,529 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:08,529 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:08,529 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:08,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:08,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1082855947, now seen corresponding path program 1 times [2019-09-03 20:04:08,530 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:08,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:08,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:08,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:08,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:08,618 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:08,618 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:08,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:08,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 20:04:08,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:08,697 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:08,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-03 20:04:08,698 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:04:08,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:04:08,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:04:08,699 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-09-03 20:04:08,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:08,747 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-09-03 20:04:08,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 20:04:08,748 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-09-03 20:04:08,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:08,749 INFO L225 Difference]: With dead ends: 23 [2019-09-03 20:04:08,749 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 20:04:08,750 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:04:08,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 20:04:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 20:04:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 20:04:08,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-09-03 20:04:08,755 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2019-09-03 20:04:08,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:08,755 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-09-03 20:04:08,755 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:04:08,756 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-09-03 20:04:08,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-03 20:04:08,756 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:08,756 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:08,757 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:08,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:08,757 INFO L82 PathProgramCache]: Analyzing trace with hash -167147406, now seen corresponding path program 2 times [2019-09-03 20:04:08,757 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:08,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:08,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:08,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:08,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:08,878 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:08,878 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:08,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:04:08,908 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:04:08,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:08,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 20:04:08,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:08,935 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:08,935 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-03 20:04:08,936 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:04:08,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:04:08,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:04:08,937 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2019-09-03 20:04:08,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:08,991 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-09-03 20:04:08,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:04:08,992 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-09-03 20:04:08,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:08,993 INFO L225 Difference]: With dead ends: 25 [2019-09-03 20:04:08,993 INFO L226 Difference]: Without dead ends: 18 [2019-09-03 20:04:08,993 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:04:08,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-03 20:04:08,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-03 20:04:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-03 20:04:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-03 20:04:08,999 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2019-09-03 20:04:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:08,999 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-03 20:04:08,999 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:04:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-03 20:04:09,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 20:04:09,000 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:09,001 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:09,001 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:09,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:09,002 INFO L82 PathProgramCache]: Analyzing trace with hash -639535185, now seen corresponding path program 3 times [2019-09-03 20:04:09,002 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:09,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:09,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:09,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:09,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:09,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:09,101 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) [2019-09-03 20:04:09,120 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 [2019-09-03 20:04:09,130 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 20:04:09,131 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:09,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 20:04:09,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 20:04:09,156 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:09,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-09-03 20:04:09,157 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:04:09,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:04:09,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:04:09,158 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2019-09-03 20:04:09,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:09,239 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-09-03 20:04:09,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:04:09,239 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-09-03 20:04:09,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:09,240 INFO L225 Difference]: With dead ends: 29 [2019-09-03 20:04:09,241 INFO L226 Difference]: Without dead ends: 22 [2019-09-03 20:04:09,241 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:04:09,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-03 20:04:09,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-09-03 20:04:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-03 20:04:09,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-03 20:04:09,247 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2019-09-03 20:04:09,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:09,248 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-03 20:04:09,248 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:04:09,248 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-03 20:04:09,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-03 20:04:09,249 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:09,249 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:09,250 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:09,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:09,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1988642215, now seen corresponding path program 1 times [2019-09-03 20:04:09,250 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:09,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:09,251 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:09,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:09,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:09,407 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:09,407 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:04:09,424 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:09,437 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-03 20:04:09,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:09,484 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:09,485 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-03 20:04:09,485 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:04:09,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:04:09,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:04:09,486 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2019-09-03 20:04:09,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:09,560 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2019-09-03 20:04:09,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:04:09,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-09-03 20:04:09,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:09,562 INFO L225 Difference]: With dead ends: 31 [2019-09-03 20:04:09,562 INFO L226 Difference]: Without dead ends: 23 [2019-09-03 20:04:09,563 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:04:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-03 20:04:09,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-03 20:04:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-03 20:04:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-09-03 20:04:09,568 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2019-09-03 20:04:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:09,568 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-09-03 20:04:09,568 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:04:09,568 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-09-03 20:04:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-03 20:04:09,569 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:09,569 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:09,569 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:09,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:09,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1766658852, now seen corresponding path program 2 times [2019-09-03 20:04:09,570 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:09,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:09,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:09,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:09,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:09,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:09,751 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:09,772 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:04:09,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:04:09,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:09,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 20:04:09,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:09,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:09,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2019-09-03 20:04:09,832 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:04:09,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:04:09,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:04:09,833 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 10 states. [2019-09-03 20:04:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:09,951 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-09-03 20:04:09,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:04:09,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-09-03 20:04:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:09,953 INFO L225 Difference]: With dead ends: 33 [2019-09-03 20:04:09,953 INFO L226 Difference]: Without dead ends: 25 [2019-09-03 20:04:09,954 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:04:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-03 20:04:09,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-03 20:04:09,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-03 20:04:09,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-09-03 20:04:09,959 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2019-09-03 20:04:09,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:09,959 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-09-03 20:04:09,960 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:04:09,960 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-09-03 20:04:09,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-03 20:04:09,961 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:09,961 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:09,961 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:09,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:09,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1105955487, now seen corresponding path program 3 times [2019-09-03 20:04:09,962 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:09,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:09,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:09,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:09,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:10,106 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:10,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:10,107 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 [2019-09-03 20:04:10,126 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:04:10,136 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 20:04:10,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:10,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-03 20:04:10,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-03 20:04:10,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:10,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 11 [2019-09-03 20:04:10,211 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:04:10,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:04:10,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:04:10,212 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 11 states. [2019-09-03 20:04:10,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:10,483 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-09-03 20:04:10,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:04:10,487 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 24 [2019-09-03 20:04:10,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:10,488 INFO L225 Difference]: With dead ends: 38 [2019-09-03 20:04:10,489 INFO L226 Difference]: Without dead ends: 30 [2019-09-03 20:04:10,489 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:04:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-03 20:04:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-03 20:04:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-03 20:04:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-09-03 20:04:10,495 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2019-09-03 20:04:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:10,495 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-09-03 20:04:10,495 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:04:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-09-03 20:04:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 20:04:10,496 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:10,497 INFO L399 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:10,497 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:10,497 INFO L82 PathProgramCache]: Analyzing trace with hash -806317607, now seen corresponding path program 4 times [2019-09-03 20:04:10,498 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:10,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:10,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:10,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:10,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:04:10,681 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:10,681 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:04:10,710 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:10,733 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:04:10,733 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:10,734 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-03 20:04:10,736 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:04:10,800 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:10,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-03 20:04:10,800 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:04:10,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:04:10,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:04:10,802 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 11 states. [2019-09-03 20:04:10,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:10,925 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-09-03 20:04:10,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:04:10,927 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-09-03 20:04:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:10,927 INFO L225 Difference]: With dead ends: 43 [2019-09-03 20:04:10,928 INFO L226 Difference]: Without dead ends: 32 [2019-09-03 20:04:10,928 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:04:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-03 20:04:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-09-03 20:04:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-03 20:04:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-09-03 20:04:10,933 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2019-09-03 20:04:10,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:10,934 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-09-03 20:04:10,934 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:04:10,934 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-09-03 20:04:10,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-03 20:04:10,935 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:10,935 INFO L399 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:10,935 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:10,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:10,936 INFO L82 PathProgramCache]: Analyzing trace with hash -251489706, now seen corresponding path program 5 times [2019-09-03 20:04:10,936 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:10,936 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:10,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:10,937 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:10,937 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:11,107 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:04:11,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:11,107 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 [2019-09-03 20:04:11,139 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:04:51,420 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-09-03 20:04:51,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:51,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-03 20:04:51,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:51,512 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:51,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 14 [2019-09-03 20:04:51,513 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:04:51,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:04:51,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:04:51,514 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 14 states. [2019-09-03 20:04:51,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:51,703 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2019-09-03 20:04:51,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:04:51,704 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2019-09-03 20:04:51,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:51,705 INFO L225 Difference]: With dead ends: 45 [2019-09-03 20:04:51,705 INFO L226 Difference]: Without dead ends: 34 [2019-09-03 20:04:51,705 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:04:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-03 20:04:51,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-09-03 20:04:51,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-03 20:04:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-09-03 20:04:51,719 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2019-09-03 20:04:51,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:51,719 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-09-03 20:04:51,720 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:04:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-09-03 20:04:51,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-03 20:04:51,721 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:51,721 INFO L399 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:51,721 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:51,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:51,722 INFO L82 PathProgramCache]: Analyzing trace with hash 362178451, now seen corresponding path program 6 times [2019-09-03 20:04:51,723 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:51,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:51,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:51,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:51,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 20:04:51,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:51,938 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:51,959 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:04:51,994 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-09-03 20:04:51,994 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:51,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-03 20:04:51,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 60 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-03 20:04:52,208 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:52,208 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2019-09-03 20:04:52,209 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:04:52,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:04:52,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:04:52,210 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 20 states. [2019-09-03 20:05:03,337 WARN L188 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 32 DAG size of output: 12 [2019-09-03 20:05:10,080 WARN L188 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-03 20:05:22,935 WARN L188 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-03 20:05:30,791 WARN L188 SmtUtils]: Spent 3.25 s on a formula simplification. DAG size of input: 36 DAG size of output: 12 [2019-09-03 20:05:47,717 WARN L188 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 32 DAG size of output: 12 [2019-09-03 20:06:04,806 WARN L188 SmtUtils]: Spent 4.16 s on a formula simplification that was a NOOP. DAG size: 16 [2019-09-03 20:06:05,411 WARN L188 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-03 20:06:07,982 WARN L188 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2019-09-03 20:06:14,717 WARN L188 SmtUtils]: Spent 6.50 s on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2019-09-03 20:06:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:14,719 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2019-09-03 20:06:14,719 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-03 20:06:14,719 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2019-09-03 20:06:14,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:14,721 INFO L225 Difference]: With dead ends: 69 [2019-09-03 20:06:14,722 INFO L226 Difference]: Without dead ends: 58 [2019-09-03 20:06:14,723 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 64.2s TimeCoverageRelationStatistics Valid=253, Invalid=796, Unknown=7, NotChecked=0, Total=1056 [2019-09-03 20:06:14,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-03 20:06:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2019-09-03 20:06:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-03 20:06:14,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-09-03 20:06:14,730 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2019-09-03 20:06:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:14,730 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-09-03 20:06:14,730 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:06:14,730 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-09-03 20:06:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-03 20:06:14,731 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:14,732 INFO L399 BasicCegarLoop]: trace histogram [15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:14,732 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:14,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:14,732 INFO L82 PathProgramCache]: Analyzing trace with hash -84800447, now seen corresponding path program 7 times [2019-09-03 20:06:14,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:14,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:14,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:14,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:14,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:06:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 99 proven. 110 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-03 20:06:14,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:06:14,892 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) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:06:14,906 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:06:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:06:14,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-03 20:06:14,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 99 proven. 110 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-03 20:06:14,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:06:14,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-03 20:06:14,984 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:06:14,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:06:14,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:06:14,985 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 14 states. [2019-09-03 20:06:15,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:15,175 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2019-09-03 20:06:15,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:06:15,176 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2019-09-03 20:06:15,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:15,177 INFO L225 Difference]: With dead ends: 59 [2019-09-03 20:06:15,177 INFO L226 Difference]: Without dead ends: 43 [2019-09-03 20:06:15,178 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:06:15,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-03 20:06:15,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-03 20:06:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-03 20:06:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-09-03 20:06:15,184 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 40 [2019-09-03 20:06:15,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:15,185 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-09-03 20:06:15,185 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:06:15,185 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-09-03 20:06:15,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-03 20:06:15,186 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:15,186 INFO L399 BasicCegarLoop]: trace histogram [16, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:15,187 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:15,187 INFO L82 PathProgramCache]: Analyzing trace with hash -2030159554, now seen corresponding path program 8 times [2019-09-03 20:06:15,187 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:15,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:15,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:15,188 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:06:15,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:06:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 108 proven. 132 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-03 20:06:15,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:06:15,391 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:06:15,401 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:06:15,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:06:15,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:15,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-03 20:06:15,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:06:15,593 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:06:15,593 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 20 [2019-09-03 20:06:15,594 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:06:15,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:06:15,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:06:15,595 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 20 states. [2019-09-03 20:06:15,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:15,934 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2019-09-03 20:06:15,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:06:15,935 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 42 [2019-09-03 20:06:15,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:15,936 INFO L225 Difference]: With dead ends: 61 [2019-09-03 20:06:15,936 INFO L226 Difference]: Without dead ends: 45 [2019-09-03 20:06:15,937 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:06:15,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-03 20:06:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-09-03 20:06:15,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-03 20:06:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-09-03 20:06:15,943 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 42 [2019-09-03 20:06:15,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:15,943 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-09-03 20:06:15,943 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:06:15,943 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-09-03 20:06:15,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-03 20:06:15,944 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:15,945 INFO L399 BasicCegarLoop]: trace histogram [17, 12, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:15,945 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:15,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:15,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1085479675, now seen corresponding path program 9 times [2019-09-03 20:06:15,945 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:15,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:15,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:15,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:15,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:06:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 117 proven. 156 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-03 20:06:16,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:06:16,166 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:06:16,190 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:06:16,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-03 20:06:16,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:16,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-03 20:06:16,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 132 proven. 25 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-09-03 20:06:16,423 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:06:16,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-09-03 20:06:16,425 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 20:06:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 20:06:16,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:06:16,426 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 21 states. [2019-09-03 20:06:18,976 WARN L838 $PredicateComparison]: unable to prove that (and (< (mod (+ c_main_~x~0 4294967289) 4294967296) 10000000) (< (mod (+ c_main_~x~0 4294967291) 4294967296) 10000000) (< (mod (+ c_main_~x~0 4294967295) 4294967296) 10000000) (< (mod (+ c_main_~x~0 4294967293) 4294967296) 10000000) (< (mod (+ c_main_~x~0 4294967287) 4294967296) 10000000) (< (mod (+ c_main_~x~0 4294967285) 4294967296) 10000000)) is different from false [2019-09-03 20:06:21,595 WARN L188 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2019-09-03 20:06:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:44,661 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2019-09-03 20:06:44,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 20:06:44,662 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 44 [2019-09-03 20:06:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:44,663 INFO L225 Difference]: With dead ends: 71 [2019-09-03 20:06:44,664 INFO L226 Difference]: Without dead ends: 55 [2019-09-03 20:06:44,665 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=158, Invalid=597, Unknown=5, NotChecked=52, Total=812 [2019-09-03 20:06:44,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-03 20:06:44,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2019-09-03 20:06:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-09-03 20:06:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2019-09-03 20:06:44,672 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 44 [2019-09-03 20:06:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:44,672 INFO L475 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2019-09-03 20:06:44,672 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 20:06:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2019-09-03 20:06:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-03 20:06:44,673 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:44,674 INFO L399 BasicCegarLoop]: trace histogram [19, 13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:44,674 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:44,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1352530035, now seen corresponding path program 10 times [2019-09-03 20:06:44,674 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:44,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:44,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:44,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:44,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:06:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 154 proven. 182 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-03 20:06:44,909 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:06:44,909 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:06:44,921 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:06:44,939 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:06:44,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:44,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-03 20:06:44,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 154 proven. 182 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-03 20:06:45,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:06:45,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-03 20:06:45,004 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 20:06:45,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 20:06:45,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:06:45,005 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 17 states. [2019-09-03 20:06:45,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:45,309 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2019-09-03 20:06:45,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 20:06:45,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2019-09-03 20:06:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:45,310 INFO L225 Difference]: With dead ends: 69 [2019-09-03 20:06:45,310 INFO L226 Difference]: Without dead ends: 51 [2019-09-03 20:06:45,311 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-09-03 20:06:45,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-03 20:06:45,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-03 20:06:45,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-03 20:06:45,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2019-09-03 20:06:45,317 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 48 [2019-09-03 20:06:45,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:45,318 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2019-09-03 20:06:45,319 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 20:06:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2019-09-03 20:06:45,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-09-03 20:06:45,320 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:45,320 INFO L399 BasicCegarLoop]: trace histogram [20, 14, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:45,320 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:45,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:45,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1533007984, now seen corresponding path program 11 times [2019-09-03 20:06:45,320 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:45,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:45,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:45,321 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:45,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:06:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 165 proven. 210 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-03 20:06:45,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:06:45,582 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:06:45,592 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:09:00,100 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-09-03 20:09:00,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:09:08,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-03 20:09:08,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:09:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-03 20:09:08,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:09:08,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 19 [2019-09-03 20:09:08,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:09:08,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:09:08,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:09:08,783 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 19 states. [2019-09-03 20:09:09,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:09:09,181 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-09-03 20:09:09,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:09:09,181 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2019-09-03 20:09:09,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:09:09,182 INFO L225 Difference]: With dead ends: 71 [2019-09-03 20:09:09,182 INFO L226 Difference]: Without dead ends: 53 [2019-09-03 20:09:09,183 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:09:09,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-03 20:09:09,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-09-03 20:09:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-03 20:09:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2019-09-03 20:09:09,200 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 50 [2019-09-03 20:09:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:09:09,201 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2019-09-03 20:09:09,201 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:09:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2019-09-03 20:09:09,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-03 20:09:09,202 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:09:09,202 INFO L399 BasicCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:09:09,202 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:09:09,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:09:09,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1121342163, now seen corresponding path program 12 times [2019-09-03 20:09:09,203 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:09:09,203 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:09:09,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:09,208 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:09:09,208 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:09:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-03 20:09:09,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:09:09,546 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:09:09,559 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:11:02,648 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2019-09-03 20:11:02,648 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:11:03,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-03 20:11:03,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:11:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-09-03 20:11:03,728 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:11:03,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2019-09-03 20:11:03,729 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:11:03,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:11:03,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:11:03,729 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 20 states. [2019-09-03 20:11:04,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:11:04,157 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2019-09-03 20:11:04,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 20:11:04,158 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2019-09-03 20:11:04,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:11:04,159 INFO L225 Difference]: With dead ends: 73 [2019-09-03 20:11:04,159 INFO L226 Difference]: Without dead ends: 55 [2019-09-03 20:11:04,160 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:11:04,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-03 20:11:04,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-09-03 20:11:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-03 20:11:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2019-09-03 20:11:04,166 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 52 [2019-09-03 20:11:04,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:11:04,167 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2019-09-03 20:11:04,167 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:11:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2019-09-03 20:11:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-03 20:11:04,168 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:11:04,168 INFO L399 BasicCegarLoop]: trace histogram [22, 16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:11:04,168 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:11:04,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:11:04,168 INFO L82 PathProgramCache]: Analyzing trace with hash -741259606, now seen corresponding path program 13 times [2019-09-03 20:11:04,169 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:11:04,169 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:11:04,169 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:04,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:11:04,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:11:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 187 proven. 272 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-03 20:11:04,495 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:11:04,495 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 [2019-09-03 20:11:04,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:11:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:11:04,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-03 20:11:04,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:11:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 187 proven. 272 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-03 20:11:04,596 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:11:04,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-03 20:11:04,597 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:11:04,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:11:04,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:11:04,598 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 20 states. [2019-09-03 20:11:05,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:11:05,011 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2019-09-03 20:11:05,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 20:11:05,012 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2019-09-03 20:11:05,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:11:05,013 INFO L225 Difference]: With dead ends: 75 [2019-09-03 20:11:05,013 INFO L226 Difference]: Without dead ends: 57 [2019-09-03 20:11:05,014 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:11:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-03 20:11:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-09-03 20:11:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-03 20:11:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2019-09-03 20:11:05,020 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 54 [2019-09-03 20:11:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:11:05,020 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2019-09-03 20:11:05,021 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:11:05,021 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2019-09-03 20:11:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-03 20:11:05,022 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:11:05,022 INFO L399 BasicCegarLoop]: trace histogram [23, 17, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:11:05,022 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:11:05,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:11:05,022 INFO L82 PathProgramCache]: Analyzing trace with hash -554142489, now seen corresponding path program 14 times [2019-09-03 20:11:05,022 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:11:05,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:11:05,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:05,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:11:05,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:11:05,324 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 198 proven. 306 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-03 20:11:05,324 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:11:05,324 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:11:05,338 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:11:05,359 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:11:05,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:11:05,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-03 20:11:05,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:11:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:11:05,560 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:11:05,560 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26] total 27 [2019-09-03 20:11:05,561 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-03 20:11:05,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-03 20:11:05,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:11:05,562 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 27 states. [2019-09-03 20:11:06,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:11:06,198 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2019-09-03 20:11:06,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:11:06,199 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 56 [2019-09-03 20:11:06,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:11:06,200 INFO L225 Difference]: With dead ends: 77 [2019-09-03 20:11:06,200 INFO L226 Difference]: Without dead ends: 59 [2019-09-03 20:11:06,200 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:11:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-03 20:11:06,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-03 20:11:06,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-03 20:11:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2019-09-03 20:11:06,214 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 56 [2019-09-03 20:11:06,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:11:06,215 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2019-09-03 20:11:06,215 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-03 20:11:06,215 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2019-09-03 20:11:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-03 20:11:06,219 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:11:06,219 INFO L399 BasicCegarLoop]: trace histogram [24, 18, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:11:06,219 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:11:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:11:06,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1123219484, now seen corresponding path program 15 times [2019-09-03 20:11:06,220 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:11:06,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:11:06,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:06,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:11:06,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:11:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:11:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 209 proven. 342 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-03 20:11:06,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:11:06,614 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) [2019-09-03 20:11:06,646 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:11:06,710 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-09-03 20:11:06,710 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:11:06,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-03 20:11:06,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:11:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2019-09-03 20:11:07,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:11:07,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-09-03 20:11:07,339 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 20:11:07,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 20:11:07,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:11:07,339 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 28 states. [2019-09-03 20:11:10,937 WARN L188 SmtUtils]: Spent 2.85 s on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2019-09-03 20:11:21,727 WARN L188 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 32 DAG size of output: 12 [2019-09-03 20:11:31,250 WARN L188 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-03 20:11:37,564 WARN L188 SmtUtils]: Spent 3.04 s on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2019-09-03 20:11:47,621 WARN L188 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2019-09-03 20:11:59,830 WARN L188 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 16 [2019-09-03 20:12:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:01,678 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2019-09-03 20:12:01,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-03 20:12:01,678 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 58 [2019-09-03 20:12:01,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:01,679 INFO L225 Difference]: With dead ends: 87 [2019-09-03 20:12:01,679 INFO L226 Difference]: Without dead ends: 69 [2019-09-03 20:12:01,680 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 41.6s TimeCoverageRelationStatistics Valid=251, Invalid=1078, Unknown=3, NotChecked=0, Total=1332 [2019-09-03 20:12:01,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-03 20:12:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2019-09-03 20:12:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-03 20:12:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2019-09-03 20:12:01,691 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 58 [2019-09-03 20:12:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:01,691 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2019-09-03 20:12:01,691 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 20:12:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2019-09-03 20:12:01,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-03 20:12:01,693 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:01,693 INFO L399 BasicCegarLoop]: trace histogram [26, 19, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:01,694 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:01,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:01,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1126866852, now seen corresponding path program 16 times [2019-09-03 20:12:01,694 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:01,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:01,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:01,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:01,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 260 proven. 380 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-03 20:12:02,078 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:12:02,078 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:12:02,090 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:12:02,114 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:12:02,114 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:02,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 42 conjunts are in the unsatisfiable core [2019-09-03 20:12:02,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 260 proven. 380 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-03 20:12:02,194 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:12:02,194 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-03 20:12:02,194 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:12:02,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:12:02,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:12:02,195 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 23 states. [2019-09-03 20:12:02,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:02,769 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2019-09-03 20:12:02,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:12:02,769 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2019-09-03 20:12:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:02,770 INFO L225 Difference]: With dead ends: 87 [2019-09-03 20:12:02,770 INFO L226 Difference]: Without dead ends: 66 [2019-09-03 20:12:02,770 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:12:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-03 20:12:02,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2019-09-03 20:12:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-03 20:12:02,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2019-09-03 20:12:02,781 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2019-09-03 20:12:02,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:02,782 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2019-09-03 20:12:02,782 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:12:02,782 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2019-09-03 20:12:02,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-03 20:12:02,783 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:02,783 INFO L399 BasicCegarLoop]: trace histogram [27, 20, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:02,783 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:02,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:02,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1362952601, now seen corresponding path program 17 times [2019-09-03 20:12:02,784 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:02,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:02,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:02,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:02,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 273 proven. 420 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-03 20:12:03,201 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:12:03,202 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:12:03,217 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:16:47,459 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-03 20:16:47,460 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:16:48,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-03 20:16:48,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:16:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 207 proven. 506 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (21)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:16:48,413 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:16:48,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 26 [2019-09-03 20:16:48,414 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-03 20:16:48,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-03 20:16:48,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:16:48,415 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 26 states. [2019-09-03 20:16:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:16:49,086 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2019-09-03 20:16:49,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 20:16:49,089 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 64 [2019-09-03 20:16:49,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:16:49,090 INFO L225 Difference]: With dead ends: 89 [2019-09-03 20:16:49,090 INFO L226 Difference]: Without dead ends: 68 [2019-09-03 20:16:49,091 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:16:49,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-09-03 20:16:49,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-09-03 20:16:49,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-03 20:16:49,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2019-09-03 20:16:49,095 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 64 [2019-09-03 20:16:49,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:16:49,104 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2019-09-03 20:16:49,104 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-03 20:16:49,105 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2019-09-03 20:16:49,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-09-03 20:16:49,105 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:16:49,105 INFO L399 BasicCegarLoop]: trace histogram [28, 21, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:16:49,106 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:16:49,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:16:49,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1782663062, now seen corresponding path program 18 times [2019-09-03 20:16:49,106 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:16:49,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:16:49,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:16:49,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:16:49,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:16:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:16:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 286 proven. 462 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-09-03 20:16:49,542 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:16:49,542 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:16:49,552 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:18:06,085 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2019-09-03 20:18:06,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:18:06,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 50 conjunts are in the unsatisfiable core [2019-09-03 20:18:06,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:18:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 328 proven. 400 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-09-03 20:18:07,078 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:18:07,078 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2019-09-03 20:18:07,079 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-03 20:18:07,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-03 20:18:07,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1674, Unknown=0, NotChecked=0, Total=1980 [2019-09-03 20:18:07,080 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 45 states. [2019-09-03 20:18:08,555 WARN L188 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 15 [2019-09-03 20:18:46,503 WARN L188 SmtUtils]: Spent 14.13 s on a formula simplification. DAG size of input: 72 DAG size of output: 12