/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:27:47,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:27:47,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:27:47,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:27:47,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:27:47,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:27:47,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:27:47,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:27:47,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:27:47,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:27:47,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:27:47,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:27:47,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:27:47,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:27:47,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:27:47,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:27:47,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:27:47,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:27:47,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:27:47,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:27:47,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:27:47,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:27:47,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:27:47,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:27:47,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:27:47,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:27:47,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:27:47,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:27:47,181 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 [2019-11-23 20:27:47,195 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:27:47,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:27:47,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:27:47,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:27:47,197 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:27:47,198 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:27:47,198 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:27:47,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:27:47,198 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:27:47,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:27:47,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:27:47,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:27:47,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:27:47,199 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:27:47,199 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:27:47,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:27:47,200 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:27:47,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:27:47,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:27:47,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:27:47,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:27:47,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:27:47,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:27:47,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:27:47,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:27:47,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:27:47,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:27:47,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:27:47,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:27:47,202 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:27:47,488 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:27:47,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:27:47,515 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:27:47,517 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:27:47,517 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:27:47,518 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init3_ground-2.i [2019-11-23 20:27:47,605 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555bba73c/ce43b9dbe8a64884b771563386d415a1/FLAG673accb5d [2019-11-23 20:27:48,070 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:27:48,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init3_ground-2.i [2019-11-23 20:27:48,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555bba73c/ce43b9dbe8a64884b771563386d415a1/FLAG673accb5d [2019-11-23 20:27:48,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/555bba73c/ce43b9dbe8a64884b771563386d415a1 [2019-11-23 20:27:48,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:27:48,511 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:27:48,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:27:48,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:27:48,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:27:48,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13ecaf57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48, skipping insertion in model container [2019-11-23 20:27:48,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:27:48,543 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:27:48,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:27:48,723 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:27:48,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:27:48,757 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:27:48,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48 WrapperNode [2019-11-23 20:27:48,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:27:48,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:27:48,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:27:48,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:27:48,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,887 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:27:48,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:27:48,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:27:48,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:27:48,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (1/1) ... [2019-11-23 20:27:48,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:27:48,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:27:48,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:27:48,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:27:48,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (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 [2019-11-23 20:27:48,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:27:48,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:27:48,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:27:48,974 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:27:48,974 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:27:48,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:27:49,203 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:27:49,204 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-23 20:27:49,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:27:49 BoogieIcfgContainer [2019-11-23 20:27:49,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:27:49,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:27:49,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:27:49,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:27:49,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:27:48" (1/3) ... [2019-11-23 20:27:49,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d20284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:27:49, skipping insertion in model container [2019-11-23 20:27:49,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:27:48" (2/3) ... [2019-11-23 20:27:49,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d20284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:27:49, skipping insertion in model container [2019-11-23 20:27:49,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:27:49" (3/3) ... [2019-11-23 20:27:49,212 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-2.i [2019-11-23 20:27:49,220 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:27:49,226 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:27:49,235 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:27:49,253 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:27:49,254 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:27:49,254 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:27:49,254 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:27:49,254 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:27:49,254 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:27:49,255 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:27:49,255 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:27:49,267 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-23 20:27:49,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:27:49,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:49,273 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:49,273 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:49,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:49,278 INFO L82 PathProgramCache]: Analyzing trace with hash -93359874, now seen corresponding path program 1 times [2019-11-23 20:27:49,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:49,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929830745] [2019-11-23 20:27:49,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:27:49,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929830745] [2019-11-23 20:27:49,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:27:49,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:27:49,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869289382] [2019-11-23 20:27:49,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:27:49,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:49,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:27:49,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:27:49,470 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-11-23 20:27:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:49,552 INFO L93 Difference]: Finished difference Result 36 states and 56 transitions. [2019-11-23 20:27:49,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:27:49,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 20:27:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:49,562 INFO L225 Difference]: With dead ends: 36 [2019-11-23 20:27:49,562 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 20:27:49,565 INFO L630 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 [2019-11-23 20:27:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 20:27:49,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-23 20:27:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 20:27:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-23 20:27:49,596 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2019-11-23 20:27:49,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:49,597 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-23 20:27:49,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:27:49,597 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-23 20:27:49,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:27:49,598 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:49,598 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:49,598 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:49,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:49,599 INFO L82 PathProgramCache]: Analyzing trace with hash -168681064, now seen corresponding path program 1 times [2019-11-23 20:27:49,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:49,599 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286751851] [2019-11-23 20:27:49,599 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:27:49,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286751851] [2019-11-23 20:27:49,665 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557977995] [2019-11-23 20:27:49,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:49,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:27:49,721 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:27:49,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:49,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:27:49,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172025159] [2019-11-23 20:27:49,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:27:49,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:49,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:27:49,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:27:49,765 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2019-11-23 20:27:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:49,822 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-11-23 20:27:49,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:27:49,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:27:49,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:49,823 INFO L225 Difference]: With dead ends: 33 [2019-11-23 20:27:49,824 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:27:49,825 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:27:49,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:27:49,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-23 20:27:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:27:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-23 20:27:49,830 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2019-11-23 20:27:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:49,830 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-23 20:27:49,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:27:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-23 20:27:49,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:27:49,832 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:49,832 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:50,035 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:50,036 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:50,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:50,037 INFO L82 PathProgramCache]: Analyzing trace with hash -873526594, now seen corresponding path program 2 times [2019-11-23 20:27:50,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:50,039 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136991455] [2019-11-23 20:27:50,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:50,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:27:50,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136991455] [2019-11-23 20:27:50,132 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185574575] [2019-11-23 20:27:50,132 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:50,186 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:50,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:50,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:27:50,188 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:27:50,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:50,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:27:50,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048023446] [2019-11-23 20:27:50,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:27:50,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:50,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:27:50,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:27:50,206 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 6 states. [2019-11-23 20:27:50,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:50,265 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2019-11-23 20:27:50,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:27:50,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-23 20:27:50,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:50,267 INFO L225 Difference]: With dead ends: 38 [2019-11-23 20:27:50,267 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:27:50,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:27:50,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:27:50,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 20:27:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:27:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-11-23 20:27:50,274 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2019-11-23 20:27:50,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:50,274 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-11-23 20:27:50,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:27:50,275 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-11-23 20:27:50,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:27:50,276 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:50,276 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:50,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:50,489 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:50,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:50,490 INFO L82 PathProgramCache]: Analyzing trace with hash -778322088, now seen corresponding path program 3 times [2019-11-23 20:27:50,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:50,491 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144782418] [2019-11-23 20:27:50,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:27:50,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144782418] [2019-11-23 20:27:50,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76311863] [2019-11-23 20:27:50,594 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:50,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:27:50,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:50,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:27:50,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:27:50,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:50,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:27:50,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578216344] [2019-11-23 20:27:50,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:27:50,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:50,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:27:50,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:27:50,668 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 7 states. [2019-11-23 20:27:50,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:50,750 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-23 20:27:50,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:27:50,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-11-23 20:27:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:50,751 INFO L225 Difference]: With dead ends: 43 [2019-11-23 20:27:50,751 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:27:50,752 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:27:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:27:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 20:27:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:27:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-11-23 20:27:50,757 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2019-11-23 20:27:50,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:50,758 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-11-23 20:27:50,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:27:50,758 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-11-23 20:27:50,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:27:50,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:50,759 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:50,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:50,969 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:50,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1736848510, now seen corresponding path program 4 times [2019-11-23 20:27:50,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:50,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197372737] [2019-11-23 20:27:50,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:27:51,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197372737] [2019-11-23 20:27:51,059 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968707254] [2019-11-23 20:27:51,059 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:51,109 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:51,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:51,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:27:51,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 20:27:51,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:51,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:27:51,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664963342] [2019-11-23 20:27:51,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:27:51,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:51,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:27:51,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:27:51,136 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 8 states. [2019-11-23 20:27:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:51,205 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2019-11-23 20:27:51,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:27:51,206 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-23 20:27:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:51,206 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:27:51,207 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:27:51,207 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:27:51,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:27:51,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 20:27:51,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:27:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-11-23 20:27:51,217 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2019-11-23 20:27:51,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:51,218 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-11-23 20:27:51,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:27:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-11-23 20:27:51,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:27:51,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:51,220 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:51,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:51,423 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:51,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:51,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1884156648, now seen corresponding path program 5 times [2019-11-23 20:27:51,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:51,425 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52953712] [2019-11-23 20:27:51,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-23 20:27:51,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52953712] [2019-11-23 20:27:51,525 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013745492] [2019-11-23 20:27:51,525 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:51,844 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:27:51,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:51,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:27:51,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:51,872 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-23 20:27:51,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:51,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:27:51,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553720663] [2019-11-23 20:27:51,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:27:51,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:51,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:27:51,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:27:51,875 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2019-11-23 20:27:51,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:51,926 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2019-11-23 20:27:51,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:27:51,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-11-23 20:27:51,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:51,929 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:27:51,929 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:27:51,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:27:51,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:27:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-23 20:27:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:27:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-11-23 20:27:51,940 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 26 [2019-11-23 20:27:51,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:51,940 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-11-23 20:27:51,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:27:51,940 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-11-23 20:27:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:27:51,941 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:51,941 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:52,153 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:52,154 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:52,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1909780030, now seen corresponding path program 6 times [2019-11-23 20:27:52,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:52,156 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317143080] [2019-11-23 20:27:52,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-23 20:27:52,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317143080] [2019-11-23 20:27:52,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706380375] [2019-11-23 20:27:52,296 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:52,437 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:27:52,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:52,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:27:52,441 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-23 20:27:52,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:52,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:27:52,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525052802] [2019-11-23 20:27:52,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:27:52,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:52,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:27:52,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:27:52,462 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 10 states. [2019-11-23 20:27:52,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:52,535 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-23 20:27:52,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:27:52,536 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2019-11-23 20:27:52,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:52,536 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:27:52,536 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:27:52,537 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:27:52,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:27:52,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-23 20:27:52,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:27:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-11-23 20:27:52,543 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2019-11-23 20:27:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:52,543 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-11-23 20:27:52,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:27:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-11-23 20:27:52,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:27:52,544 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:52,544 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:52,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:52,749 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:52,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:52,750 INFO L82 PathProgramCache]: Analyzing trace with hash -571143464, now seen corresponding path program 7 times [2019-11-23 20:27:52,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:52,751 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724938668] [2019-11-23 20:27:52,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-23 20:27:52,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724938668] [2019-11-23 20:27:52,867 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839315635] [2019-11-23 20:27:52,867 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:52,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:27:52,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-23 20:27:52,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:52,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:27:52,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94637058] [2019-11-23 20:27:52,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:27:52,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:52,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:27:52,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:27:52,948 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 11 states. [2019-11-23 20:27:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:53,044 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2019-11-23 20:27:53,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:27:53,047 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2019-11-23 20:27:53,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:53,048 INFO L225 Difference]: With dead ends: 63 [2019-11-23 20:27:53,048 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:27:53,051 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:27:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:27:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 20:27:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:27:53,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-11-23 20:27:53,062 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2019-11-23 20:27:53,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:53,062 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-11-23 20:27:53,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:27:53,062 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-11-23 20:27:53,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:27:53,063 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:53,064 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:53,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:53,271 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:53,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1115371518, now seen corresponding path program 8 times [2019-11-23 20:27:53,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:53,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397249531] [2019-11-23 20:27:53,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:53,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:27:53,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397249531] [2019-11-23 20:27:53,429 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134665513] [2019-11-23 20:27:53,429 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:53,481 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:27:53,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:53,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:27:53,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:27:53,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:53,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:27:53,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127923891] [2019-11-23 20:27:53,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:27:53,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:53,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:27:53,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:27:53,507 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 12 states. [2019-11-23 20:27:53,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:53,582 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2019-11-23 20:27:53,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:27:53,582 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-23 20:27:53,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:53,583 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:27:53,583 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:27:53,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:27:53,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:27:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-23 20:27:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 20:27:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2019-11-23 20:27:53,589 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2019-11-23 20:27:53,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:53,590 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2019-11-23 20:27:53,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:27:53,590 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2019-11-23 20:27:53,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:27:53,591 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:53,591 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:53,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:53,801 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:53,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:53,802 INFO L82 PathProgramCache]: Analyzing trace with hash -953894760, now seen corresponding path program 9 times [2019-11-23 20:27:53,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:53,802 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639341622] [2019-11-23 20:27:53,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-23 20:27:53,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639341622] [2019-11-23 20:27:53,933 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6789750] [2019-11-23 20:27:53,933 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:54,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:27:54,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:54,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:27:54,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-23 20:27:54,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:54,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:27:54,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998258435] [2019-11-23 20:27:54,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:27:54,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:54,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:27:54,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:27:54,111 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 13 states. [2019-11-23 20:27:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:54,181 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2019-11-23 20:27:54,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:27:54,181 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2019-11-23 20:27:54,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:54,182 INFO L225 Difference]: With dead ends: 73 [2019-11-23 20:27:54,182 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:27:54,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:27:54,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:27:54,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 20:27:54,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:27:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-11-23 20:27:54,188 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 38 [2019-11-23 20:27:54,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:54,188 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-11-23 20:27:54,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:27:54,189 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-11-23 20:27:54,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:27:54,189 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:54,190 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:54,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:54,395 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:54,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:54,396 INFO L82 PathProgramCache]: Analyzing trace with hash -468119106, now seen corresponding path program 10 times [2019-11-23 20:27:54,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:54,397 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915214887] [2019-11-23 20:27:54,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-23 20:27:54,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915214887] [2019-11-23 20:27:54,524 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160837802] [2019-11-23 20:27:54,524 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:54,566 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:27:54,567 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:27:54,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:27:54,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:27:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-11-23 20:27:54,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:27:54,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:27:54,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216388752] [2019-11-23 20:27:54,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:27:54,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:27:54,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:27:54,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:27:54,593 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 14 states. [2019-11-23 20:27:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:27:54,674 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2019-11-23 20:27:54,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:27:54,675 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2019-11-23 20:27:54,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:27:54,676 INFO L225 Difference]: With dead ends: 78 [2019-11-23 20:27:54,676 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:27:54,677 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:27:54,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:27:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-23 20:27:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 20:27:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-11-23 20:27:54,682 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2019-11-23 20:27:54,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:27:54,683 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-11-23 20:27:54,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:27:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-11-23 20:27:54,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:27:54,684 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:27:54,684 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:27:54,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:27:54,888 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:27:54,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:27:54,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1291774376, now seen corresponding path program 11 times [2019-11-23 20:27:54,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:27:54,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854814342] [2019-11-23 20:27:54,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:27:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:27:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-11-23 20:27:55,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854814342] [2019-11-23 20:27:55,051 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89739458] [2019-11-23 20:27:55,051 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:03,869 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 20:28:03,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:03,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:28:03,890 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2019-11-23 20:28:03,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:03,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:28:03,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894114580] [2019-11-23 20:28:03,906 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:28:03,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:03,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:28:03,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:28:03,907 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 15 states. [2019-11-23 20:28:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:04,002 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2019-11-23 20:28:04,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:28:04,003 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2019-11-23 20:28:04,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:04,003 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:28:04,003 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:28:04,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:28:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:28:04,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-23 20:28:04,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:28:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2019-11-23 20:28:04,011 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44 [2019-11-23 20:28:04,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:04,011 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2019-11-23 20:28:04,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:28:04,012 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2019-11-23 20:28:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:28:04,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:04,013 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:04,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:04,214 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:04,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:04,214 INFO L82 PathProgramCache]: Analyzing trace with hash 340687742, now seen corresponding path program 12 times [2019-11-23 20:28:04,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:04,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980184919] [2019-11-23 20:28:04,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-23 20:28:04,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980184919] [2019-11-23 20:28:04,371 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219595199] [2019-11-23 20:28:04,372 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:07,821 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:28:07,821 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:07,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:28:07,828 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-23 20:28:07,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:07,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:28:07,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459240876] [2019-11-23 20:28:07,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:28:07,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:07,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:28:07,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:28:07,848 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 16 states. [2019-11-23 20:28:07,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:07,917 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2019-11-23 20:28:07,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:28:07,917 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2019-11-23 20:28:07,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:07,918 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:28:07,918 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 20:28:07,918 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:28:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 20:28:07,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-23 20:28:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:28:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2019-11-23 20:28:07,924 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 47 [2019-11-23 20:28:07,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:07,924 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2019-11-23 20:28:07,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:28:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2019-11-23 20:28:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:28:07,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:07,925 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:08,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:08,126 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:08,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:08,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1716134936, now seen corresponding path program 13 times [2019-11-23 20:28:08,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:08,127 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446081828] [2019-11-23 20:28:08,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-11-23 20:28:08,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446081828] [2019-11-23 20:28:08,307 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417094650] [2019-11-23 20:28:08,307 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:08,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:08,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:28:08,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-11-23 20:28:08,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:08,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:28:08,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742558623] [2019-11-23 20:28:08,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:28:08,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:08,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:28:08,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:28:08,443 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 17 states. [2019-11-23 20:28:08,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:08,557 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2019-11-23 20:28:08,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:28:08,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 50 [2019-11-23 20:28:08,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:08,559 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:28:08,559 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:28:08,559 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:28:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:28:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-23 20:28:08,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:28:08,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2019-11-23 20:28:08,573 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 50 [2019-11-23 20:28:08,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:08,575 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2019-11-23 20:28:08,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:28:08,575 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2019-11-23 20:28:08,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:28:08,576 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:08,576 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:08,777 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:08,777 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:08,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:08,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1136358718, now seen corresponding path program 14 times [2019-11-23 20:28:08,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:08,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434922687] [2019-11-23 20:28:08,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:08,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:28:08,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434922687] [2019-11-23 20:28:08,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655256684] [2019-11-23 20:28:08,952 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:09,023 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:28:09,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:09,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:28:09,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:28:09,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:09,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:28:09,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169389747] [2019-11-23 20:28:09,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:28:09,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:09,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:28:09,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:28:09,061 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 18 states. [2019-11-23 20:28:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:09,167 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2019-11-23 20:28:09,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:28:09,167 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 53 [2019-11-23 20:28:09,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:09,168 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:28:09,168 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 20:28:09,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:28:09,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 20:28:09,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-23 20:28:09,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:28:09,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2019-11-23 20:28:09,184 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2019-11-23 20:28:09,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:09,185 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2019-11-23 20:28:09,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:28:09,185 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2019-11-23 20:28:09,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 20:28:09,186 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:09,186 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:09,392 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:09,392 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:09,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:09,393 INFO L82 PathProgramCache]: Analyzing trace with hash 46129624, now seen corresponding path program 15 times [2019-11-23 20:28:09,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:09,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114162047] [2019-11-23 20:28:09,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2019-11-23 20:28:09,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114162047] [2019-11-23 20:28:09,606 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646589564] [2019-11-23 20:28:09,607 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:13,042 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:28:13,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:13,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:28:13,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2019-11-23 20:28:13,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:13,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:28:13,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105378049] [2019-11-23 20:28:13,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:28:13,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:13,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:28:13,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:28:13,064 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 19 states. [2019-11-23 20:28:13,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:13,183 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2019-11-23 20:28:13,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:28:13,183 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 56 [2019-11-23 20:28:13,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:13,184 INFO L225 Difference]: With dead ends: 103 [2019-11-23 20:28:13,184 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:28:13,185 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:28:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:28:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-23 20:28:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:28:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2019-11-23 20:28:13,194 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 56 [2019-11-23 20:28:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:13,194 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2019-11-23 20:28:13,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:28:13,195 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2019-11-23 20:28:13,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:28:13,195 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:13,195 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:13,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:13,403 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:13,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:13,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1778385154, now seen corresponding path program 16 times [2019-11-23 20:28:13,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:13,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262811536] [2019-11-23 20:28:13,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2019-11-23 20:28:13,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262811536] [2019-11-23 20:28:13,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337601952] [2019-11-23 20:28:13,600 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:13,678 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:28:13,678 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:28:13,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:28:13,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:28:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2019-11-23 20:28:13,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:28:13,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:28:13,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153306992] [2019-11-23 20:28:13,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:28:13,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:28:13,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:28:13,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:28:13,720 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 20 states. [2019-11-23 20:28:13,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:28:13,835 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-11-23 20:28:13,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:28:13,835 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2019-11-23 20:28:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:28:13,836 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:28:13,836 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:28:13,837 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:28:13,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:28:13,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-23 20:28:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:28:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2019-11-23 20:28:13,849 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2019-11-23 20:28:13,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:28:13,849 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2019-11-23 20:28:13,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:28:13,850 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2019-11-23 20:28:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 20:28:13,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:28:13,851 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:28:14,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:28:14,056 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:28:14,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:28:14,056 INFO L82 PathProgramCache]: Analyzing trace with hash 119689112, now seen corresponding path program 17 times [2019-11-23 20:28:14,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:28:14,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285581899] [2019-11-23 20:28:14,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:28:14,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:28:14,288 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2019-11-23 20:28:14,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285581899] [2019-11-23 20:28:14,289 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128731368] [2019-11-23 20:28:14,289 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true