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/Mono3_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:04:09,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:04:09,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:04:09,533 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 20:04:09,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 20:04:09,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 20:04:09,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 20:04:09,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 20:04:09,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 20:04:09,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 20:04:09,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 20:04:09,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 20:04:09,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:04:09,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:04:09,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:04:09,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:04:09,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:04:09,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:04:09,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:04:09,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:04:09,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:04:09,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:04:09,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:04:09,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:04:09,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:04:09,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 20:04:09,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 20:04:09,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 20:04:09,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 20:04:09,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 20:04:09,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 20:04:09,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 20:04:09,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 20:04:09,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:04:09,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:04:09,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:04:09,571 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 20:04:09,590 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:04:09,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:04:09,593 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:04:09,593 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:04:09,594 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:04:09,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:04:09,594 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:04:09,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:04:09,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:04:09,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:04:09,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:04:09,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:04:09,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:04:09,595 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:04:09,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:04:09,596 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:04:09,596 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:04:09,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:04:09,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:04:09,598 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:04:09,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:04:09,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:04:09,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:04:09,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:04:09,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:04:09,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:04:09,600 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:04:09,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:04:09,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:04:09,646 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:04:09,658 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:04:09,661 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:04:09,662 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:04:09,663 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:04:09,664 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono3_1.c [2019-09-03 20:04:09,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60995e79/331b80c423264289b6135e6e748fa1d1/FLAGc2c5897fc [2019-09-03 20:04:10,178 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:04:10,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono3_1.c [2019-09-03 20:04:10,186 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60995e79/331b80c423264289b6135e6e748fa1d1/FLAGc2c5897fc [2019-09-03 20:04:10,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e60995e79/331b80c423264289b6135e6e748fa1d1 [2019-09-03 20:04:10,585 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:04:10,587 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:04:10,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:04:10,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:04:10,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:04:10,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61dde08c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10, skipping insertion in model container [2019-09-03 20:04:10,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,601 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:04:10,616 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:04:10,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:04:10,794 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:04:10,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:04:10,818 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:04:10,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10 WrapperNode [2019-09-03 20:04:10,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:04:10,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:04:10,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:04:10,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:04:10,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,929 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (1/1) ... [2019-09-03 20:04:10,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:04:10,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:04:10,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:04:10,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:04:10,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (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 20:04:10,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:04:10,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:04:10,982 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:04:10,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:04:10,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:04:10,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:04:10,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:04:10,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:04:10,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:04:11,143 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:04:11,144 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:04:11,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:04:11 BoogieIcfgContainer [2019-09-03 20:04:11,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:04:11,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:04:11,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:04:11,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:04:11,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:04:10" (1/3) ... [2019-09-03 20:04:11,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efdda1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:04:11, skipping insertion in model container [2019-09-03 20:04:11,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:04:10" (2/3) ... [2019-09-03 20:04:11,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efdda1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:04:11, skipping insertion in model container [2019-09-03 20:04:11,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:04:11" (3/3) ... [2019-09-03 20:04:11,153 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono3_1.c [2019-09-03 20:04:11,162 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:04:11,168 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:04:11,185 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:04:11,215 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:04:11,216 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:04:11,216 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:04:11,216 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:04:11,216 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:04:11,216 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:04:11,216 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:04:11,217 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:04:11,217 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:04:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-03 20:04:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:04:11,241 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:11,241 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:11,244 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:11,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:11,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2019-09-03 20:04:11,250 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:11,251 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:11,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:11,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:11,339 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 20:04:11,341 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:04:11,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:04:11,345 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:04:11,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:04:11,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:04:11,357 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-03 20:04:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:11,375 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-09-03 20:04:11,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:04:11,376 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 20:04:11,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:11,382 INFO L225 Difference]: With dead ends: 30 [2019-09-03 20:04:11,383 INFO L226 Difference]: Without dead ends: 13 [2019-09-03 20:04:11,385 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 20:04:11,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-03 20:04:11,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-03 20:04:11,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-03 20:04:11,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-09-03 20:04:11,419 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-09-03 20:04:11,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:11,420 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-09-03 20:04:11,420 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:04:11,420 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-09-03 20:04:11,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:04:11,421 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:11,421 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:11,421 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:11,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:11,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2019-09-03 20:04:11,422 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:11,422 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:11,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,423 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:11,423 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:11,519 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 20:04:11,519 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:04:11,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 20:04:11,521 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 20:04:11,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 20:04:11,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:04:11,522 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 3 states. [2019-09-03 20:04:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:11,566 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2019-09-03 20:04:11,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 20:04:11,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-03 20:04:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:11,573 INFO L225 Difference]: With dead ends: 24 [2019-09-03 20:04:11,573 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 20:04:11,574 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:04:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 20:04:11,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2019-09-03 20:04:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-03 20:04:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-03 20:04:11,579 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-09-03 20:04:11,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:11,579 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-03 20:04:11,580 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 20:04:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-03 20:04:11,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 20:04:11,580 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:11,581 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:11,581 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:11,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1264308876, now seen corresponding path program 1 times [2019-09-03 20:04:11,585 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:11,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:11,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,586 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:11,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:11,725 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 20:04:11,725 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:11,726 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:04:11,746 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:11,763 WARN L254 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 20:04:11,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:11,823 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 20:04:11,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:11,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2019-09-03 20:04:11,828 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 20:04:11,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 20:04:11,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:04:11,830 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2019-09-03 20:04:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:11,894 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-03 20:04:11,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 20:04:11,896 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-09-03 20:04:11,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:11,897 INFO L225 Difference]: With dead ends: 27 [2019-09-03 20:04:11,898 INFO L226 Difference]: Without dead ends: 19 [2019-09-03 20:04:11,899 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-09-03 20:04:11,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-03 20:04:11,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-09-03 20:04:11,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-03 20:04:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-03 20:04:11,907 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-03 20:04:11,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:11,913 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-03 20:04:11,914 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 20:04:11,914 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-03 20:04:11,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 20:04:11,915 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:11,915 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:11,915 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:11,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:11,916 INFO L82 PathProgramCache]: Analyzing trace with hash 127284375, now seen corresponding path program 2 times [2019-09-03 20:04:11,916 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:11,916 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:11,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:11,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:12,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:12,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:12,033 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) [2019-09-03 20:04:12,049 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:12,065 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:04:12,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:12,067 WARN L254 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 20:04:12,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:12,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:12,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2019-09-03 20:04:12,147 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:04:12,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:04:12,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:04:12,148 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2019-09-03 20:04:12,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:12,229 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-09-03 20:04:12,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:04:12,230 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-09-03 20:04:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:12,231 INFO L225 Difference]: With dead ends: 30 [2019-09-03 20:04:12,231 INFO L226 Difference]: Without dead ends: 22 [2019-09-03 20:04:12,232 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:04:12,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-03 20:04:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-09-03 20:04:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-03 20:04:12,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-03 20:04:12,238 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2019-09-03 20:04:12,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:12,238 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-03 20:04:12,238 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:04:12,238 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-03 20:04:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-03 20:04:12,239 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:12,239 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:12,240 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:12,240 INFO L82 PathProgramCache]: Analyzing trace with hash 2057483924, now seen corresponding path program 3 times [2019-09-03 20:04:12,240 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:12,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:12,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:12,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:12,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:12,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:12,363 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:12,378 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:04:12,413 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 20:04:12,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:12,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-03 20:04:12,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:04:12,473 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:04:12,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2019-09-03 20:04:12,474 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:04:12,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:04:12,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:04:12,476 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2019-09-03 20:04:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:12,607 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2019-09-03 20:04:12,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:04:12,608 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-09-03 20:04:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:12,609 INFO L225 Difference]: With dead ends: 40 [2019-09-03 20:04:12,609 INFO L226 Difference]: Without dead ends: 32 [2019-09-03 20:04:12,609 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:04:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-03 20:04:12,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-09-03 20:04:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-03 20:04:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-09-03 20:04:12,616 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 19 [2019-09-03 20:04:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:12,616 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-09-03 20:04:12,616 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:04:12,616 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-09-03 20:04:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 20:04:12,617 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:12,617 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:12,618 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:12,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:12,618 INFO L82 PathProgramCache]: Analyzing trace with hash 796117209, now seen corresponding path program 1 times [2019-09-03 20:04:12,618 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:12,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:12,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:12,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:12,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:12,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:12,791 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:12,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:12,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-03 20:04:12,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:12,876 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:12,877 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-03 20:04:12,877 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 20:04:12,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 20:04:12,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:04:12,878 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2019-09-03 20:04:13,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:13,016 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2019-09-03 20:04:13,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 20:04:13,016 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2019-09-03 20:04:13,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:13,017 INFO L225 Difference]: With dead ends: 43 [2019-09-03 20:04:13,017 INFO L226 Difference]: Without dead ends: 33 [2019-09-03 20:04:13,018 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-09-03 20:04:13,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-03 20:04:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-09-03 20:04:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-03 20:04:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-09-03 20:04:13,024 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2019-09-03 20:04:13,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:13,025 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-09-03 20:04:13,025 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 20:04:13,025 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-09-03 20:04:13,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-03 20:04:13,026 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:13,027 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:13,027 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:13,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:13,027 INFO L82 PathProgramCache]: Analyzing trace with hash 776222550, now seen corresponding path program 2 times [2019-09-03 20:04:13,027 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:13,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:13,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:13,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:04:13,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:13,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:13,286 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 20:04:13,307 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:04:13,325 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:04:13,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:13,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-03 20:04:13,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:13,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:13,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2019-09-03 20:04:13,428 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 20:04:13,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 20:04:13,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:04:13,429 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 11 states. [2019-09-03 20:04:13,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:13,627 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2019-09-03 20:04:13,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:04:13,628 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2019-09-03 20:04:13,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:13,629 INFO L225 Difference]: With dead ends: 49 [2019-09-03 20:04:13,629 INFO L226 Difference]: Without dead ends: 39 [2019-09-03 20:04:13,630 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-03 20:04:13,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-03 20:04:13,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-09-03 20:04:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-03 20:04:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-09-03 20:04:13,636 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2019-09-03 20:04:13,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:13,637 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-09-03 20:04:13,637 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 20:04:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-09-03 20:04:13,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-03 20:04:13,638 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:13,638 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:13,639 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:13,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:13,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1805731722, now seen corresponding path program 3 times [2019-09-03 20:04:13,639 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:13,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:13,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:13,641 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:13,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:04:13,883 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:13,883 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 20:04:13,898 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:04:13,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 20:04:13,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:13,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-03 20:04:13,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-03 20:04:13,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:13,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2019-09-03 20:04:13,988 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:04:13,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:04:13,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:04:13,989 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2019-09-03 20:04:14,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:14,346 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2019-09-03 20:04:14,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:04:14,347 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 37 [2019-09-03 20:04:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:14,348 INFO L225 Difference]: With dead ends: 63 [2019-09-03 20:04:14,348 INFO L226 Difference]: Without dead ends: 53 [2019-09-03 20:04:14,349 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:04:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-03 20:04:14,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2019-09-03 20:04:14,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-03 20:04:14,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2019-09-03 20:04:14,356 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 37 [2019-09-03 20:04:14,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:14,356 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2019-09-03 20:04:14,356 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:04:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2019-09-03 20:04:14,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-03 20:04:14,358 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:14,358 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:14,358 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:14,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:14,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1626205111, now seen corresponding path program 4 times [2019-09-03 20:04:14,359 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:14,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:14,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:14,360 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:14,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 53 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:04:14,594 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:14,594 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:04:14,621 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:04:14,642 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:04:14,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:04:14,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-03 20:04:14,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:04:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 53 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:04:14,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:04:14,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-09-03 20:04:14,704 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 20:04:14,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 20:04:14,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-09-03 20:04:14,705 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 14 states. [2019-09-03 20:04:14,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:04:14,979 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2019-09-03 20:04:14,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 20:04:14,980 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 46 [2019-09-03 20:04:14,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:04:14,981 INFO L225 Difference]: With dead ends: 64 [2019-09-03 20:04:14,981 INFO L226 Difference]: Without dead ends: 51 [2019-09-03 20:04:14,982 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 44 SyntacticMatches, 4 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 20:04:14,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-03 20:04:14,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-09-03 20:04:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-03 20:04:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-09-03 20:04:14,988 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2019-09-03 20:04:14,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:04:14,988 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-09-03 20:04:14,989 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 20:04:14,989 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-09-03 20:04:14,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-03 20:04:14,990 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:04:14,990 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:04:14,991 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:04:14,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:04:14,991 INFO L82 PathProgramCache]: Analyzing trace with hash -303000332, now seen corresponding path program 5 times [2019-09-03 20:04:14,991 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:04:14,991 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:04:14,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:14,992 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:04:14,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:04:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:04:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 58 proven. 187 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:04:15,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:04:15,210 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 20:04:15,230 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:05:35,170 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-03 20:05:35,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:38,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-03 20:05:38,308 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Stream closed [2019-09-03 20:05:38,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:38,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 16 [2019-09-03 20:05:38,409 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 20:05:38,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 20:05:38,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:05:38,410 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 16 states. [2019-09-03 20:05:38,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:38,776 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2019-09-03 20:05:38,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:05:38,776 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2019-09-03 20:05:38,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:38,777 INFO L225 Difference]: With dead ends: 70 [2019-09-03 20:05:38,777 INFO L226 Difference]: Without dead ends: 57 [2019-09-03 20:05:38,778 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:05:38,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-03 20:05:38,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2019-09-03 20:05:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-03 20:05:38,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-09-03 20:05:38,787 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 49 [2019-09-03 20:05:38,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:38,789 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-09-03 20:05:38,789 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 20:05:38,789 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-09-03 20:05:38,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-03 20:05:38,792 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:38,793 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:38,793 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:38,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:38,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1377373716, now seen corresponding path program 6 times [2019-09-03 20:05:38,794 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:38,794 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:38,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:38,795 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:38,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 68 proven. 260 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:05:39,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:39,102 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 20:05:39,117 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:05:39,150 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-03 20:05:39,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:39,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-03 20:05:39,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:39,250 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 101 proven. 7 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-09-03 20:05:39,259 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:39,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-09-03 20:05:39,259 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-03 20:05:39,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-03 20:05:39,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2019-09-03 20:05:39,260 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2019-09-03 20:05:39,878 WARN L188 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 10 [2019-09-03 20:05:49,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:49,345 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2019-09-03 20:05:49,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-03 20:05:49,345 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2019-09-03 20:05:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:49,349 INFO L225 Difference]: With dead ends: 87 [2019-09-03 20:05:49,349 INFO L226 Difference]: Without dead ends: 74 [2019-09-03 20:05:49,350 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=221, Invalid=481, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:05:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-03 20:05:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2019-09-03 20:05:49,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-03 20:05:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2019-09-03 20:05:49,358 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 55 [2019-09-03 20:05:49,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:49,358 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2019-09-03 20:05:49,358 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-03 20:05:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2019-09-03 20:05:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-03 20:05:49,359 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:49,360 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 15, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:49,360 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:49,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:49,360 INFO L82 PathProgramCache]: Analyzing trace with hash -569880231, now seen corresponding path program 7 times [2019-09-03 20:05:49,360 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:49,361 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:49,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:49,361 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:49,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 125 proven. 345 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:05:49,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:49,661 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 20:05:49,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:49,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:49,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-03 20:05:49,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 125 proven. 345 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:05:49,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:49,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-03 20:05:49,843 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:05:49,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:05:49,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:05:49,844 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 19 states. [2019-09-03 20:05:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:50,436 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2019-09-03 20:05:50,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 20:05:50,437 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 64 [2019-09-03 20:05:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:50,438 INFO L225 Difference]: With dead ends: 85 [2019-09-03 20:05:50,438 INFO L226 Difference]: Without dead ends: 69 [2019-09-03 20:05:50,439 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:05:50,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-03 20:05:50,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-09-03 20:05:50,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-03 20:05:50,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2019-09-03 20:05:50,446 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 64 [2019-09-03 20:05:50,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:50,446 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2019-09-03 20:05:50,446 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:05:50,446 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2019-09-03 20:05:50,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-03 20:05:50,447 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:50,447 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 16, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:50,448 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:50,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:50,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1789658454, now seen corresponding path program 8 times [2019-09-03 20:05:50,448 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:50,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:50,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:50,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:50,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 133 proven. 392 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:05:50,803 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:50,803 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 20:05:50,813 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:05:50,844 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:05:50,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:50,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2019-09-03 20:05:50,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:50,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:50,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22] total 23 [2019-09-03 20:05:50,987 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:05:50,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:05:50,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:05:50,991 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand 23 states. [2019-09-03 20:05:51,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:51,769 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2019-09-03 20:05:51,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 20:05:51,769 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2019-09-03 20:05:51,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:51,770 INFO L225 Difference]: With dead ends: 97 [2019-09-03 20:05:51,770 INFO L226 Difference]: Without dead ends: 81 [2019-09-03 20:05:51,771 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:05:51,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-03 20:05:51,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-09-03 20:05:51,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-03 20:05:51,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2019-09-03 20:05:51,781 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 67 [2019-09-03 20:05:51,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:51,781 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2019-09-03 20:05:51,781 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:05:51,782 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2019-09-03 20:05:51,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-03 20:05:51,783 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:51,783 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 20, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:51,783 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:51,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:51,783 INFO L82 PathProgramCache]: Analyzing trace with hash 418090902, now seen corresponding path program 9 times [2019-09-03 20:05:51,783 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:51,784 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:51,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:51,785 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:51,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 165 proven. 610 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:05:52,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:52,180 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:05:52,201 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:05:52,225 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-03 20:05:52,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:52,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 20:05:52,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 216 proven. 15 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (13)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:05:52,374 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:52,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 7] total 28 [2019-09-03 20:05:52,374 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 20:05:52,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 20:05:52,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:05:52,376 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 28 states. [2019-09-03 20:05:53,584 WARN L188 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 10 [2019-09-03 20:05:56,941 WARN L188 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-03 20:06:06,216 WARN L188 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2019-09-03 20:06:06,960 WARN L188 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 10 [2019-09-03 20:06:06,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:06,968 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2019-09-03 20:06:06,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-09-03 20:06:06,969 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2019-09-03 20:06:06,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:06,971 INFO L225 Difference]: With dead ends: 117 [2019-09-03 20:06:06,971 INFO L226 Difference]: Without dead ends: 101 [2019-09-03 20:06:06,973 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=414, Invalid=990, Unknown=2, NotChecked=0, Total=1406 [2019-09-03 20:06:06,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-09-03 20:06:06,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2019-09-03 20:06:06,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-03 20:06:06,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-09-03 20:06:06,992 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 79 [2019-09-03 20:06:06,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:06,993 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-09-03 20:06:06,993 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 20:06:06,993 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-09-03 20:06:06,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-03 20:06:06,994 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:06,994 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 22, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:06,994 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:06,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1759160471, now seen corresponding path program 10 times [2019-09-03 20:06:06,995 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:06,995 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:06,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:06,996 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:06,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:06:07,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 249 proven. 737 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:06:07,429 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:06:07,429 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 20:06:07,440 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:06:07,466 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:06:07,467 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:06:07,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 48 conjunts are in the unsatisfiable core [2019-09-03 20:06:07,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:06:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 249 proven. 737 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:06:07,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:06:07,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-09-03 20:06:07,576 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-03 20:06:07,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-03 20:06:07,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:06:07,577 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 26 states. [2019-09-03 20:06:08,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:06:08,687 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2019-09-03 20:06:08,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-03 20:06:08,689 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 88 [2019-09-03 20:06:08,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:06:08,690 INFO L225 Difference]: With dead ends: 112 [2019-09-03 20:06:08,690 INFO L226 Difference]: Without dead ends: 93 [2019-09-03 20:06:08,691 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-09-03 20:06:08,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-03 20:06:08,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2019-09-03 20:06:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-03 20:06:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-09-03 20:06:08,698 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 88 [2019-09-03 20:06:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:06:08,698 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-09-03 20:06:08,698 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-03 20:06:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-09-03 20:06:08,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-09-03 20:06:08,699 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:06:08,699 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 23, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:06:08,699 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:06:08,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:06:08,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1712420244, now seen corresponding path program 11 times [2019-09-03 20:06:08,700 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:06:08,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:06:08,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:08,701 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:06:08,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:06:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:06:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 260 proven. 805 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:06:09,226 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:06:09,226 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 20:06:09,241 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:09:57,450 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-03 20:09:57,451 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:09:57,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 52 conjunts are in the unsatisfiable core [2019-09-03 20:09:57,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:09:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 197 proven. 876 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:09:57,914 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:09:57,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 28 [2019-09-03 20:09:57,915 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 20:09:57,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 20:09:57,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:09:57,916 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 28 states. [2019-09-03 20:09:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:09:59,191 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2019-09-03 20:09:59,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-03 20:09:59,192 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 91 [2019-09-03 20:09:59,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:09:59,193 INFO L225 Difference]: With dead ends: 118 [2019-09-03 20:09:59,193 INFO L226 Difference]: Without dead ends: 99 [2019-09-03 20:09:59,195 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:09:59,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-03 20:09:59,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-09-03 20:09:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-09-03 20:09:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2019-09-03 20:09:59,202 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 91 [2019-09-03 20:09:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:09:59,202 INFO L475 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2019-09-03 20:09:59,202 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 20:09:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2019-09-03 20:09:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-09-03 20:09:59,203 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:09:59,203 INFO L399 BasicCegarLoop]: trace histogram [29, 29, 25, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:09:59,204 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:09:59,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:09:59,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1379891532, now seen corresponding path program 12 times [2019-09-03 20:09:59,204 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:09:59,204 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:09:59,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:59,205 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:09:59,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:09:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:09:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 282 proven. 950 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:09:59,721 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:09:59,721 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:09:59,730 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:10:03,766 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-03 20:10:03,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:03,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-03 20:10:03,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 345 proven. 26 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2019-09-03 20:10:03,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:10:03,976 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 8] total 34 [2019-09-03 20:10:03,977 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-03 20:10:03,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-03 20:10:03,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 20:10:03,978 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 34 states. [2019-09-03 20:10:07,681 WARN L188 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 26 DAG size of output: 10 [2019-09-03 20:10:15,369 WARN L188 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2019-09-03 20:10:39,862 WARN L188 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 18 DAG size of output: 10 [2019-09-03 20:10:42,365 WARN L188 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-03 20:10:51,816 WARN L188 SmtUtils]: Spent 4.96 s on a formula simplification. DAG size of input: 22 DAG size of output: 10 [2019-09-03 20:10:51,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:51,817 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2019-09-03 20:10:51,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-03 20:10:51,817 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2019-09-03 20:10:51,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:51,819 INFO L225 Difference]: With dead ends: 142 [2019-09-03 20:10:51,819 INFO L226 Difference]: Without dead ends: 123 [2019-09-03 20:10:51,820 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=662, Invalid=1588, Unknown=6, NotChecked=0, Total=2256 [2019-09-03 20:10:51,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-09-03 20:10:51,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2019-09-03 20:10:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-09-03 20:10:51,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2019-09-03 20:10:51,827 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 97 [2019-09-03 20:10:51,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:51,827 INFO L475 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2019-09-03 20:10:51,827 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-03 20:10:51,828 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2019-09-03 20:10:51,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-03 20:10:51,829 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:51,829 INFO L399 BasicCegarLoop]: trace histogram [32, 32, 27, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:51,829 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:51,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:51,829 INFO L82 PathProgramCache]: Analyzing trace with hash 305855673, now seen corresponding path program 13 times [2019-09-03 20:10:51,829 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:51,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:51,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:51,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:51,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:10:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 387 proven. 1107 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-03 20:10:52,480 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:10:52,480 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 20:10:52,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:10:52,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 58 conjunts are in the unsatisfiable core [2019-09-03 20:10:52,526 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 387 proven. 1107 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-03 20:10:52,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:10:52,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-09-03 20:10:52,636 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-03 20:10:52,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-03 20:10:52,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2019-09-03 20:10:52,637 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand 31 states. [2019-09-03 20:10:54,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:54,169 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2019-09-03 20:10:54,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-03 20:10:54,169 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 106 [2019-09-03 20:10:54,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:54,171 INFO L225 Difference]: With dead ends: 133 [2019-09-03 20:10:54,171 INFO L226 Difference]: Without dead ends: 111 [2019-09-03 20:10:54,173 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2019-09-03 20:10:54,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-03 20:10:54,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2019-09-03 20:10:54,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-09-03 20:10:54,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2019-09-03 20:10:54,179 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 106 [2019-09-03 20:10:54,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:54,179 INFO L475 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2019-09-03 20:10:54,179 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-03 20:10:54,180 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2019-09-03 20:10:54,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-09-03 20:10:54,181 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:54,181 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 28, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:54,181 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:54,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:54,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1966695542, now seen corresponding path program 14 times [2019-09-03 20:10:54,182 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:54,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:54,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:54,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:10:54,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:10:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 401 proven. 1190 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-03 20:10:54,940 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:10:54,940 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 20:10:54,951 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:10:54,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:10:54,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:54,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 69 conjunts are in the unsatisfiable core [2019-09-03 20:10:54,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:10:55,210 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:10:55,210 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 36] total 37 [2019-09-03 20:10:55,211 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-03 20:10:55,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-03 20:10:55,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 20:10:55,212 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand 37 states. [2019-09-03 20:10:57,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:10:57,526 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2019-09-03 20:10:57,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-03 20:10:57,527 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2019-09-03 20:10:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:10:57,529 INFO L225 Difference]: With dead ends: 151 [2019-09-03 20:10:57,529 INFO L226 Difference]: Without dead ends: 129 [2019-09-03 20:10:57,530 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 20:10:57,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-09-03 20:10:57,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2019-09-03 20:10:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-09-03 20:10:57,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2019-09-03 20:10:57,538 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 109 [2019-09-03 20:10:57,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:10:57,538 INFO L475 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2019-09-03 20:10:57,538 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-03 20:10:57,539 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2019-09-03 20:10:57,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-03 20:10:57,540 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:10:57,540 INFO L399 BasicCegarLoop]: trace histogram [39, 39, 34, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:10:57,540 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:10:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:10:57,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2023520214, now seen corresponding path program 15 times [2019-09-03 20:10:57,541 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:10:57,541 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:10:57,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:57,542 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:10:57,542 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:10:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:10:58,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 485 proven. 1751 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-03 20:10:58,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:10:58,371 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) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:10:58,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:10:58,440 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-03 20:10:58,440 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:10:58,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-03 20:10:58,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:10:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 572 proven. 40 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2019-09-03 20:10:58,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:10:58,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 9] total 44 [2019-09-03 20:10:58,736 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-03 20:10:58,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-03 20:10:58,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2019-09-03 20:10:58,738 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 44 states. [2019-09-03 20:11:11,216 WARN L188 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 30 DAG size of output: 10 [2019-09-03 20:11:21,665 WARN L188 SmtUtils]: Spent 4.85 s on a formula simplification. DAG size of input: 28 DAG size of output: 16 [2019-09-03 20:11:24,442 WARN L188 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2019-09-03 20:11:27,103 WARN L188 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-03 20:11:47,092 WARN L188 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2019-09-03 20:11:52,402 WARN L188 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 18 DAG size of output: 10 [2019-09-03 20:11:53,884 WARN L188 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2019-09-03 20:11:59,061 WARN L188 SmtUtils]: Spent 4.31 s on a formula simplification. DAG size of input: 22 DAG size of output: 10 [2019-09-03 20:12:00,415 WARN L188 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 10 [2019-09-03 20:12:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:00,417 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2019-09-03 20:12:00,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-09-03 20:12:00,417 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 127 [2019-09-03 20:12:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:00,419 INFO L225 Difference]: With dead ends: 177 [2019-09-03 20:12:00,419 INFO L226 Difference]: Without dead ends: 155 [2019-09-03 20:12:00,420 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=980, Invalid=2558, Unknown=2, NotChecked=0, Total=3540 [2019-09-03 20:12:00,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-09-03 20:12:00,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 137. [2019-09-03 20:12:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-09-03 20:12:00,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 143 transitions. [2019-09-03 20:12:00,427 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 143 transitions. Word has length 127 [2019-09-03 20:12:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:00,427 INFO L475 AbstractCegarLoop]: Abstraction has 137 states and 143 transitions. [2019-09-03 20:12:00,427 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-03 20:12:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 143 transitions. [2019-09-03 20:12:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-03 20:12:00,429 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:00,429 INFO L399 BasicCegarLoop]: trace histogram [42, 42, 36, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:00,429 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:00,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:00,430 INFO L82 PathProgramCache]: Analyzing trace with hash 241735767, now seen corresponding path program 16 times [2019-09-03 20:12:00,430 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:00,430 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:00,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:00,431 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:00,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:01,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 623 proven. 1962 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-03 20:12:01,577 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:12:01,577 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 20:12:01,588 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:12:01,637 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:12:01,638 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:01,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 86 conjunts are in the unsatisfiable core [2019-09-03 20:12:01,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 83 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:12:01,952 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:12:01,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 44] total 45 [2019-09-03 20:12:01,952 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-03 20:12:01,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-03 20:12:01,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1856, Unknown=0, NotChecked=0, Total=1980 [2019-09-03 20:12:01,953 INFO L87 Difference]: Start difference. First operand 137 states and 143 transitions. Second operand 45 states. [2019-09-03 20:12:05,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:05,154 INFO L93 Difference]: Finished difference Result 181 states and 199 transitions. [2019-09-03 20:12:05,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-03 20:12:05,155 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 136 [2019-09-03 20:12:05,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:05,157 INFO L225 Difference]: With dead ends: 181 [2019-09-03 20:12:05,157 INFO L226 Difference]: Without dead ends: 156 [2019-09-03 20:12:05,158 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=124, Invalid=1856, Unknown=0, NotChecked=0, Total=1980 [2019-09-03 20:12:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-09-03 20:12:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2019-09-03 20:12:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-09-03 20:12:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 161 transitions. [2019-09-03 20:12:05,167 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 161 transitions. Word has length 136 [2019-09-03 20:12:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:05,167 INFO L475 AbstractCegarLoop]: Abstraction has 155 states and 161 transitions. [2019-09-03 20:12:05,167 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-03 20:12:05,167 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 161 transitions. [2019-09-03 20:12:05,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-03 20:12:05,169 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:05,169 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 42, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:05,169 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:05,169 INFO L82 PathProgramCache]: Analyzing trace with hash -686528265, now seen corresponding path program 17 times [2019-09-03 20:12:05,170 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:05,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:05,170 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:05,170 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:05,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:06,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 725 proven. 2667 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-03 20:12:06,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:12:06,471 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:12:06,485 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000