/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/sorting_bubblesort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:20:16,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:20:16,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:20:16,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:20:16,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:20:16,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:20:16,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:20:16,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:20:16,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:20:16,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:20:16,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:20:16,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:20:16,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:20:16,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:20:16,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:20:16,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:20:16,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:20:16,494 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:20:16,496 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:20:16,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:20:16,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:20:16,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:20:16,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:20:16,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:20:16,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 20:20:16,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 20:20:16,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 20:20:16,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 20:20:16,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 20:20:16,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 20:20:16,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:20:16,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:20:16,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:20:16,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:20:16,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:20:16,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:20:16,524 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:20:16,524 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:20:16,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:20:16,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:20:16,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:20:16,527 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 20:20:16,548 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:20:16,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:20:16,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:20:16,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:20:16,551 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:20:16,552 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:20:16,552 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:20:16,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:20:16,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:20:16,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:20:16,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:20:16,553 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:20:16,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:20:16,554 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:20:16,554 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:20:16,554 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:20:16,555 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:20:16,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:20:16,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:20:16,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:20:16,556 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:20:16,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:20:16,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:20:16,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:20:16,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:20:16,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:20:16,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:20:16,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:20:16,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:20:16,557 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:20:16,838 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:20:16,851 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:20:16,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:20:16,855 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:20:16,856 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:20:16,856 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i [2019-11-23 20:20:16,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7766d1f0/6e5830c50d86490482c710c1693c53f5/FLAG7f4bc9bda [2019-11-23 20:20:17,409 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:20:17,410 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_bubblesort_ground-2.i [2019-11-23 20:20:17,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7766d1f0/6e5830c50d86490482c710c1693c53f5/FLAG7f4bc9bda [2019-11-23 20:20:17,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7766d1f0/6e5830c50d86490482c710c1693c53f5 [2019-11-23 20:20:17,789 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:20:17,792 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:20:17,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:20:17,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:20:17,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:20:17,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:20:17" (1/1) ... [2019-11-23 20:20:17,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71e616d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:17, skipping insertion in model container [2019-11-23 20:20:17,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:20:17" (1/1) ... [2019-11-23 20:20:17,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:20:17,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:20:18,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:20:18,054 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:20:18,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:20:18,095 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:20:18,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:18 WrapperNode [2019-11-23 20:20:18,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:20:18,096 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:20:18,097 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:20:18,097 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:20:18,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:18" (1/1) ... [2019-11-23 20:20:18,195 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:18" (1/1) ... [2019-11-23 20:20:18,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:20:18,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:20:18,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:20:18,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:20:18,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:18" (1/1) ... [2019-11-23 20:20:18,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:18" (1/1) ... [2019-11-23 20:20:18,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:18" (1/1) ... [2019-11-23 20:20:18,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:18" (1/1) ... [2019-11-23 20:20:18,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:18" (1/1) ... [2019-11-23 20:20:18,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:18" (1/1) ... [2019-11-23 20:20:18,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:18" (1/1) ... [2019-11-23 20:20:18,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:20:18,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:20:18,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:20:18,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:20:18,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:18" (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 20:20:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:20:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:20:18,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:20:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:20:18,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:20:18,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:20:18,579 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:20:18,579 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 20:20:18,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:20:18 BoogieIcfgContainer [2019-11-23 20:20:18,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:20:18,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:20:18,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:20:18,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:20:18,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:20:17" (1/3) ... [2019-11-23 20:20:18,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273b3fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:20:18, skipping insertion in model container [2019-11-23 20:20:18,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:18" (2/3) ... [2019-11-23 20:20:18,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@273b3fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:20:18, skipping insertion in model container [2019-11-23 20:20:18,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:20:18" (3/3) ... [2019-11-23 20:20:18,589 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_ground-2.i [2019-11-23 20:20:18,600 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:20:18,609 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:20:18,622 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:20:18,663 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:20:18,664 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:20:18,664 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:20:18,664 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:20:18,664 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:20:18,664 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:20:18,665 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:20:18,665 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:20:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-23 20:20:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:20:18,700 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:18,701 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:18,701 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:18,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:18,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1960376238, now seen corresponding path program 1 times [2019-11-23 20:20:18,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:18,713 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595541126] [2019-11-23 20:20:18,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:18,855 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 20:20:18,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595541126] [2019-11-23 20:20:18,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:18,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:18,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19583631] [2019-11-23 20:20:18,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:18,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:18,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:18,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:18,879 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-11-23 20:20:18,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:18,922 INFO L93 Difference]: Finished difference Result 42 states and 64 transitions. [2019-11-23 20:20:18,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:18,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:20:18,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:18,932 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:20:18,933 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:20:18,936 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 20:20:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:20:18,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-23 20:20:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:20:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-23 20:20:18,966 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2019-11-23 20:20:18,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:18,967 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-23 20:20:18,967 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:18,967 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-11-23 20:20:18,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:20:18,968 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:18,968 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:18,968 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:18,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:18,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1305178672, now seen corresponding path program 1 times [2019-11-23 20:20:18,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:18,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771141899] [2019-11-23 20:20:18,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:19,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771141899] [2019-11-23 20:20:19,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:19,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:19,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496293881] [2019-11-23 20:20:19,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:19,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:19,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:19,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:19,026 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 3 states. [2019-11-23 20:20:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:19,050 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2019-11-23 20:20:19,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:19,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-23 20:20:19,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:19,052 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:20:19,053 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 20:20:19,054 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 20:20:19,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 20:20:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 20:20:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:20:19,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2019-11-23 20:20:19,060 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 12 [2019-11-23 20:20:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:19,060 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2019-11-23 20:20:19,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2019-11-23 20:20:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:20:19,061 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:19,061 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:19,062 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:19,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1356848343, now seen corresponding path program 1 times [2019-11-23 20:20:19,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:19,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984555371] [2019-11-23 20:20:19,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:19,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984555371] [2019-11-23 20:20:19,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:19,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:19,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146761236] [2019-11-23 20:20:19,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:19,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:19,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:19,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:19,109 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 3 states. [2019-11-23 20:20:19,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:19,133 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2019-11-23 20:20:19,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:19,134 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-23 20:20:19,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:19,135 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:20:19,135 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:20:19,136 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 20:20:19,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:20:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-11-23 20:20:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:20:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-11-23 20:20:19,141 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 14 [2019-11-23 20:20:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:19,142 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-11-23 20:20:19,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-11-23 20:20:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:20:19,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:19,143 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:19,143 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:19,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:19,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1942419029, now seen corresponding path program 1 times [2019-11-23 20:20:19,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:19,145 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013563228] [2019-11-23 20:20:19,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:19,214 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 20:20:19,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013563228] [2019-11-23 20:20:19,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417957287] [2019-11-23 20:20:19,215 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 20:20:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:19,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:20:19,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:19,332 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 20:20:19,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:19,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:20:19,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436301685] [2019-11-23 20:20:19,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:20:19,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:19,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:20:19,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:20:19,340 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2019-11-23 20:20:19,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:19,378 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2019-11-23 20:20:19,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:20:19,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-23 20:20:19,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:19,383 INFO L225 Difference]: With dead ends: 46 [2019-11-23 20:20:19,383 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:20:19,385 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 20:20:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:20:19,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-23 20:20:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:20:19,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2019-11-23 20:20:19,396 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 17 [2019-11-23 20:20:19,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:19,396 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2019-11-23 20:20:19,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:20:19,396 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-11-23 20:20:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:20:19,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:19,400 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:19,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:19,602 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:19,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:19,603 INFO L82 PathProgramCache]: Analyzing trace with hash 784472297, now seen corresponding path program 2 times [2019-11-23 20:20:19,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:19,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811763340] [2019-11-23 20:20:19,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:19,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:20:19,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811763340] [2019-11-23 20:20:19,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564464193] [2019-11-23 20:20:19,694 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 20:20:19,752 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:19,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:19,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:20:19,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:20:19,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:19,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:20:19,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813381939] [2019-11-23 20:20:19,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:20:19,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:19,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:20:19,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:20:19,785 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 6 states. [2019-11-23 20:20:19,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:19,829 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2019-11-23 20:20:19,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:20:19,832 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-23 20:20:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:19,833 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:20:19,833 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:20:19,834 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 20:20:19,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:20:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:20:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:20:19,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-23 20:20:19,845 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 19 [2019-11-23 20:20:19,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:19,845 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-23 20:20:19,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:20:19,848 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-23 20:20:19,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:20:19,849 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:19,849 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:20,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:20,052 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:20,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:20,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1396986023, now seen corresponding path program 3 times [2019-11-23 20:20:20,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:20,053 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671955017] [2019-11-23 20:20:20,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:20:20,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671955017] [2019-11-23 20:20:20,129 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622799644] [2019-11-23 20:20:20,129 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 20:20:20,198 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:20:20,199 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:20,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:20:20,203 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:20:20,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:20,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-11-23 20:20:20,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060932381] [2019-11-23 20:20:20,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:20:20,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:20,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:20:20,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:20,232 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 8 states. [2019-11-23 20:20:20,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:20,307 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2019-11-23 20:20:20,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:20:20,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2019-11-23 20:20:20,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:20,311 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:20:20,311 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:20:20,311 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:20,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:20:20,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2019-11-23 20:20:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 20:20:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-11-23 20:20:20,318 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 21 [2019-11-23 20:20:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:20,318 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-11-23 20:20:20,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:20:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-11-23 20:20:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 20:20:20,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:20,319 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:20,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:20,520 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:20,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:20,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1870344925, now seen corresponding path program 4 times [2019-11-23 20:20:20,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:20,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83518722] [2019-11-23 20:20:20,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:20:20,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83518722] [2019-11-23 20:20:20,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711184398] [2019-11-23 20:20:20,616 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 20:20:20,665 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:20,666 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:20,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:20:20,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:20:20,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:20,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:20:20,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552010609] [2019-11-23 20:20:20,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:20:20,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:20,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:20:20,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:20:20,682 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 8 states. [2019-11-23 20:20:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:20,709 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-11-23 20:20:20,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:20:20,710 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2019-11-23 20:20:20,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:20,711 INFO L225 Difference]: With dead ends: 62 [2019-11-23 20:20:20,711 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:20:20,711 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 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 20:20:20,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:20:20,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-11-23 20:20:20,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:20:20,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-11-23 20:20:20,717 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 26 [2019-11-23 20:20:20,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:20,717 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-11-23 20:20:20,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:20:20,717 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-11-23 20:20:20,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:20:20,718 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:20,718 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:20,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:20,924 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:20,925 INFO L82 PathProgramCache]: Analyzing trace with hash 243034463, now seen corresponding path program 5 times [2019-11-23 20:20:20,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:20,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456407701] [2019-11-23 20:20:20,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:21,022 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:20:21,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456407701] [2019-11-23 20:20:21,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328850426] [2019-11-23 20:20:21,024 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 20:20:21,081 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-23 20:20:21,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:21,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:20:21,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 20:20:21,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:21,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 20:20:21,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912157225] [2019-11-23 20:20:21,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:20:21,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:21,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:20:21,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:20:21,130 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 11 states. [2019-11-23 20:20:21,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:21,223 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2019-11-23 20:20:21,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:20:21,224 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-11-23 20:20:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:21,224 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:20:21,225 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:20:21,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:20:21,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:20:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2019-11-23 20:20:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:20:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2019-11-23 20:20:21,234 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 28 [2019-11-23 20:20:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:21,234 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2019-11-23 20:20:21,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:20:21,235 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2019-11-23 20:20:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:20:21,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:21,236 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:21,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:21,438 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:21,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:21,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1982159585, now seen corresponding path program 6 times [2019-11-23 20:20:21,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:21,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078418645] [2019-11-23 20:20:21,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-23 20:20:21,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078418645] [2019-11-23 20:20:21,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507048463] [2019-11-23 20:20:21,549 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 20:20:21,614 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:20:21,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:21,615 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:20:21,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:20:21,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:21,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2019-11-23 20:20:21,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926740108] [2019-11-23 20:20:21,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:20:21,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:21,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:20:21,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:20:21,674 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand 13 states. [2019-11-23 20:20:21,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:21,776 INFO L93 Difference]: Finished difference Result 88 states and 114 transitions. [2019-11-23 20:20:21,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:20:21,777 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2019-11-23 20:20:21,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:21,778 INFO L225 Difference]: With dead ends: 88 [2019-11-23 20:20:21,779 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:20:21,780 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:20:21,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:20:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2019-11-23 20:20:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:20:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-11-23 20:20:21,794 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 33 [2019-11-23 20:20:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:21,795 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-11-23 20:20:21,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:20:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-11-23 20:20:21,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:20:21,798 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:21,798 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:21,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:21,999 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:22,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:22,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1236783971, now seen corresponding path program 7 times [2019-11-23 20:20:22,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:22,000 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802456273] [2019-11-23 20:20:22,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:20:22,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802456273] [2019-11-23 20:20:22,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782525772] [2019-11-23 20:20:22,150 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 20:20:22,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:22,198 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:20:22,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:20:22,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:22,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:20:22,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288749182] [2019-11-23 20:20:22,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:20:22,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:22,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:20:22,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:20:22,228 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 11 states. [2019-11-23 20:20:22,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:22,273 INFO L93 Difference]: Finished difference Result 92 states and 116 transitions. [2019-11-23 20:20:22,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:20:22,274 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2019-11-23 20:20:22,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:22,275 INFO L225 Difference]: With dead ends: 92 [2019-11-23 20:20:22,275 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:20:22,276 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 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 20:20:22,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:20:22,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2019-11-23 20:20:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 20:20:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2019-11-23 20:20:22,288 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 38 [2019-11-23 20:20:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:22,291 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2019-11-23 20:20:22,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:20:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2019-11-23 20:20:22,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 20:20:22,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:22,293 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:22,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:22,493 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:22,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:22,494 INFO L82 PathProgramCache]: Analyzing trace with hash 824268517, now seen corresponding path program 8 times [2019-11-23 20:20:22,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:22,494 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640871230] [2019-11-23 20:20:22,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:20:22,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640871230] [2019-11-23 20:20:22,607 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498421340] [2019-11-23 20:20:22,607 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 20:20:22,649 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:22,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:22,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:20:22,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:20:22,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:22,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:20:22,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087182274] [2019-11-23 20:20:22,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:20:22,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:22,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:20:22,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:22,668 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 12 states. [2019-11-23 20:20:22,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:22,705 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2019-11-23 20:20:22,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:20:22,706 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2019-11-23 20:20:22,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:22,707 INFO L225 Difference]: With dead ends: 94 [2019-11-23 20:20:22,707 INFO L226 Difference]: Without dead ends: 58 [2019-11-23 20:20:22,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 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 20:20:22,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-23 20:20:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-11-23 20:20:22,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:20:22,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2019-11-23 20:20:22,719 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 40 [2019-11-23 20:20:22,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:22,720 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2019-11-23 20:20:22,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:20:22,720 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2019-11-23 20:20:22,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 20:20:22,724 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:22,724 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:22,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:22,928 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:22,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:22,928 INFO L82 PathProgramCache]: Analyzing trace with hash -466091545, now seen corresponding path program 9 times [2019-11-23 20:20:22,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:22,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774205681] [2019-11-23 20:20:22,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:22,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-23 20:20:23,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774205681] [2019-11-23 20:20:23,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713957002] [2019-11-23 20:20:23,075 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 20:20:23,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:20:23,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:23,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:20:23,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-23 20:20:23,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:23,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2019-11-23 20:20:23,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055677686] [2019-11-23 20:20:23,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:20:23,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:23,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:20:23,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:20:23,190 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 17 states. [2019-11-23 20:20:23,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:23,288 INFO L93 Difference]: Finished difference Result 106 states and 136 transitions. [2019-11-23 20:20:23,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:20:23,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2019-11-23 20:20:23,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:23,289 INFO L225 Difference]: With dead ends: 106 [2019-11-23 20:20:23,289 INFO L226 Difference]: Without dead ends: 70 [2019-11-23 20:20:23,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:20:23,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-23 20:20:23,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2019-11-23 20:20:23,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:20:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2019-11-23 20:20:23,297 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 42 [2019-11-23 20:20:23,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:23,298 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2019-11-23 20:20:23,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:20:23,298 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2019-11-23 20:20:23,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:20:23,299 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:23,299 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:23,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:23,507 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:23,508 INFO L82 PathProgramCache]: Analyzing trace with hash -981471015, now seen corresponding path program 10 times [2019-11-23 20:20:23,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:23,508 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212786599] [2019-11-23 20:20:23,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:20:23,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212786599] [2019-11-23 20:20:23,651 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909989281] [2019-11-23 20:20:23,652 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 20:20:23,716 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:23,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:23,718 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:20:23,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:20:23,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:23,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:20:23,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792349585] [2019-11-23 20:20:23,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:20:23,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:23,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:20:23,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:20:23,764 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand 14 states. [2019-11-23 20:20:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:23,814 INFO L93 Difference]: Finished difference Result 110 states and 138 transitions. [2019-11-23 20:20:23,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:20:23,814 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2019-11-23 20:20:23,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:23,815 INFO L225 Difference]: With dead ends: 110 [2019-11-23 20:20:23,815 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:20:23,816 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:20:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:20:23,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2019-11-23 20:20:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 20:20:23,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2019-11-23 20:20:23,822 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 47 [2019-11-23 20:20:23,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:23,822 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2019-11-23 20:20:23,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:20:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2019-11-23 20:20:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:20:23,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:23,823 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:24,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:24,027 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:24,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:24,028 INFO L82 PathProgramCache]: Analyzing trace with hash -966443113, now seen corresponding path program 11 times [2019-11-23 20:20:24,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:24,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608211572] [2019-11-23 20:20:24,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:24,154 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:20:24,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608211572] [2019-11-23 20:20:24,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947636836] [2019-11-23 20:20:24,155 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 20:20:24,256 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2019-11-23 20:20:24,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:24,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:20:24,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-11-23 20:20:24,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:24,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2019-11-23 20:20:24,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003970492] [2019-11-23 20:20:24,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:20:24,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:24,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:20:24,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:20:24,330 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand 20 states. [2019-11-23 20:20:24,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:24,458 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2019-11-23 20:20:24,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:20:24,458 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2019-11-23 20:20:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:24,459 INFO L225 Difference]: With dead ends: 122 [2019-11-23 20:20:24,459 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:20:24,460 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:20:24,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:20:24,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2019-11-23 20:20:24,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 20:20:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2019-11-23 20:20:24,465 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 49 [2019-11-23 20:20:24,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:24,465 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2019-11-23 20:20:24,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:20:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2019-11-23 20:20:24,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:20:24,466 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:24,467 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:24,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:24,667 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:24,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:24,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1108613395, now seen corresponding path program 12 times [2019-11-23 20:20:24,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:24,668 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353116981] [2019-11-23 20:20:24,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:20:24,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353116981] [2019-11-23 20:20:24,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821386653] [2019-11-23 20:20:24,827 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 20:20:24,997 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:20:24,997 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:24,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:20:25,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:20:25,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:25,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2019-11-23 20:20:25,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837875192] [2019-11-23 20:20:25,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:20:25,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:25,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:20:25,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:20:25,111 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 22 states. [2019-11-23 20:20:25,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:25,214 INFO L93 Difference]: Finished difference Result 136 states and 174 transitions. [2019-11-23 20:20:25,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:20:25,215 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2019-11-23 20:20:25,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:25,217 INFO L225 Difference]: With dead ends: 136 [2019-11-23 20:20:25,217 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:20:25,218 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:20:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:20:25,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2019-11-23 20:20:25,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-23 20:20:25,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2019-11-23 20:20:25,228 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 54 [2019-11-23 20:20:25,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:25,228 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2019-11-23 20:20:25,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:20:25,228 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2019-11-23 20:20:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:20:25,234 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:25,235 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:25,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:25,439 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:25,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:25,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1894041325, now seen corresponding path program 13 times [2019-11-23 20:20:25,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:25,440 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529118197] [2019-11-23 20:20:25,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 20:20:25,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529118197] [2019-11-23 20:20:25,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966364066] [2019-11-23 20:20:25,596 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 20:20:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:25,670 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:20:25,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 20:20:25,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:25,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:20:25,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966759493] [2019-11-23 20:20:25,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:20:25,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:25,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:20:25,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:20:25,729 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 17 states. [2019-11-23 20:20:25,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:25,816 INFO L93 Difference]: Finished difference Result 140 states and 176 transitions. [2019-11-23 20:20:25,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:20:25,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2019-11-23 20:20:25,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:25,818 INFO L225 Difference]: With dead ends: 140 [2019-11-23 20:20:25,818 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:20:25,820 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 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 20:20:25,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:20:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-11-23 20:20:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-23 20:20:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2019-11-23 20:20:25,827 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 59 [2019-11-23 20:20:25,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:25,828 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2019-11-23 20:20:25,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:20:25,828 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2019-11-23 20:20:25,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:20:25,831 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:25,831 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:26,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:26,036 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:26,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1371167441, now seen corresponding path program 14 times [2019-11-23 20:20:26,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:26,037 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403397432] [2019-11-23 20:20:26,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 20:20:26,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403397432] [2019-11-23 20:20:26,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490892996] [2019-11-23 20:20:26,246 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 20:20:26,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:26,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:26,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:20:26,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 20:20:26,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:26,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:20:26,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915940126] [2019-11-23 20:20:26,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:20:26,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:26,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:20:26,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:20:26,344 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand 18 states. [2019-11-23 20:20:26,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:26,401 INFO L93 Difference]: Finished difference Result 142 states and 178 transitions. [2019-11-23 20:20:26,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:20:26,402 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2019-11-23 20:20:26,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:26,403 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:20:26,403 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:20:26,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 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 20:20:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:20:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2019-11-23 20:20:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-23 20:20:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 105 transitions. [2019-11-23 20:20:26,408 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 105 transitions. Word has length 61 [2019-11-23 20:20:26,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:26,408 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 105 transitions. [2019-11-23 20:20:26,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:20:26,408 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 105 transitions. [2019-11-23 20:20:26,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-23 20:20:26,409 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:26,409 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:26,612 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:26,612 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:26,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:26,613 INFO L82 PathProgramCache]: Analyzing trace with hash -384301809, now seen corresponding path program 15 times [2019-11-23 20:20:26,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:26,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874693961] [2019-11-23 20:20:26,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-23 20:20:26,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874693961] [2019-11-23 20:20:26,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229350842] [2019-11-23 20:20:26,786 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 20:20:26,867 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:20:26,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:26,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:20:26,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:20:27,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:27,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 26 [2019-11-23 20:20:27,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121469303] [2019-11-23 20:20:27,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:20:27,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:27,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:20:27,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:20:27,012 INFO L87 Difference]: Start difference. First operand 87 states and 105 transitions. Second operand 26 states. [2019-11-23 20:20:27,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:27,145 INFO L93 Difference]: Finished difference Result 154 states and 196 transitions. [2019-11-23 20:20:27,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:20:27,146 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2019-11-23 20:20:27,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:27,147 INFO L225 Difference]: With dead ends: 154 [2019-11-23 20:20:27,147 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 20:20:27,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=453, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:20:27,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 20:20:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2019-11-23 20:20:27,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 20:20:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2019-11-23 20:20:27,156 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 63 [2019-11-23 20:20:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:27,157 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2019-11-23 20:20:27,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:20:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2019-11-23 20:20:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 20:20:27,158 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:27,158 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:27,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:27,363 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:27,363 INFO L82 PathProgramCache]: Analyzing trace with hash 2008179445, now seen corresponding path program 16 times [2019-11-23 20:20:27,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:27,364 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576875963] [2019-11-23 20:20:27,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-23 20:20:27,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576875963] [2019-11-23 20:20:27,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608581621] [2019-11-23 20:20:27,569 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 20:20:27,633 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:27,634 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:27,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:20:27,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-23 20:20:27,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:27,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:20:27,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928186446] [2019-11-23 20:20:27,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:20:27,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:27,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:20:27,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:20:27,663 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand 20 states. [2019-11-23 20:20:27,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:27,738 INFO L93 Difference]: Finished difference Result 158 states and 198 transitions. [2019-11-23 20:20:27,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:20:27,738 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2019-11-23 20:20:27,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:27,739 INFO L225 Difference]: With dead ends: 158 [2019-11-23 20:20:27,739 INFO L226 Difference]: Without dead ends: 98 [2019-11-23 20:20:27,740 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 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 20:20:27,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-23 20:20:27,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-23 20:20:27,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-23 20:20:27,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2019-11-23 20:20:27,744 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 68 [2019-11-23 20:20:27,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:27,745 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2019-11-23 20:20:27,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:20:27,745 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2019-11-23 20:20:27,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 20:20:27,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:27,746 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:27,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:27,949 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:27,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:27,950 INFO L82 PathProgramCache]: Analyzing trace with hash -32876809, now seen corresponding path program 17 times [2019-11-23 20:20:27,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:27,951 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014389327] [2019-11-23 20:20:27,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-23 20:20:28,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014389327] [2019-11-23 20:20:28,143 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068123760] [2019-11-23 20:20:28,143 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 [2019-11-23 20:20:28,307 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-23 20:20:28,307 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:28,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:20:28,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 1 proven. 92 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-11-23 20:20:28,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:28,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 29 [2019-11-23 20:20:28,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56561673] [2019-11-23 20:20:28,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:20:28,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:28,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:20:28,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:20:28,430 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand 29 states. [2019-11-23 20:20:28,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:28,592 INFO L93 Difference]: Finished difference Result 170 states and 216 transitions. [2019-11-23 20:20:28,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:20:28,592 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2019-11-23 20:20:28,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:28,594 INFO L225 Difference]: With dead ends: 170 [2019-11-23 20:20:28,594 INFO L226 Difference]: Without dead ends: 110 [2019-11-23 20:20:28,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=568, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:20:28,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-23 20:20:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2019-11-23 20:20:28,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-23 20:20:28,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2019-11-23 20:20:28,599 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 70 [2019-11-23 20:20:28,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:28,599 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2019-11-23 20:20:28,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:20:28,599 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2019-11-23 20:20:28,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:20:28,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:28,600 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:28,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:28,810 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:28,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:28,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1211963593, now seen corresponding path program 18 times [2019-11-23 20:20:28,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:28,811 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005705893] [2019-11-23 20:20:28,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-23 20:20:29,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005705893] [2019-11-23 20:20:29,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088842819] [2019-11-23 20:20:29,053 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:29,394 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 20:20:29,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:29,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:20:29,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 1 proven. 117 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2019-11-23 20:20:29,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:29,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 31 [2019-11-23 20:20:29,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521719851] [2019-11-23 20:20:29,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:20:29,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:29,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:20:29,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:20:29,567 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand 31 states. [2019-11-23 20:20:29,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:29,736 INFO L93 Difference]: Finished difference Result 184 states and 234 transitions. [2019-11-23 20:20:29,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:20:29,736 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 75 [2019-11-23 20:20:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:29,737 INFO L225 Difference]: With dead ends: 184 [2019-11-23 20:20:29,737 INFO L226 Difference]: Without dead ends: 118 [2019-11-23 20:20:29,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:20:29,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-23 20:20:29,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2019-11-23 20:20:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-23 20:20:29,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2019-11-23 20:20:29,742 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 75 [2019-11-23 20:20:29,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:29,742 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2019-11-23 20:20:29,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:20:29,743 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2019-11-23 20:20:29,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-11-23 20:20:29,743 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:29,744 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:29,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:29,949 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:29,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:29,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2135143941, now seen corresponding path program 19 times [2019-11-23 20:20:29,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:29,950 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621140632] [2019-11-23 20:20:29,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:20:30,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621140632] [2019-11-23 20:20:30,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652523828] [2019-11-23 20:20:30,188 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:30,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:20:30,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:20:30,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:30,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-23 20:20:30,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161148626] [2019-11-23 20:20:30,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:20:30,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:30,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:20:30,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:20:30,268 INFO L87 Difference]: Start difference. First operand 113 states and 137 transitions. Second operand 23 states. [2019-11-23 20:20:30,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:30,357 INFO L93 Difference]: Finished difference Result 188 states and 236 transitions. [2019-11-23 20:20:30,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:20:30,358 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 80 [2019-11-23 20:20:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:30,359 INFO L225 Difference]: With dead ends: 188 [2019-11-23 20:20:30,359 INFO L226 Difference]: Without dead ends: 116 [2019-11-23 20:20:30,359 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:20:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-11-23 20:20:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2019-11-23 20:20:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2019-11-23 20:20:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 139 transitions. [2019-11-23 20:20:30,364 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 139 transitions. Word has length 80 [2019-11-23 20:20:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:30,364 INFO L462 AbstractCegarLoop]: Abstraction has 115 states and 139 transitions. [2019-11-23 20:20:30,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:20:30,364 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 139 transitions. [2019-11-23 20:20:30,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-23 20:20:30,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:30,365 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:30,575 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:30,575 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:30,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:30,575 INFO L82 PathProgramCache]: Analyzing trace with hash -70497539, now seen corresponding path program 20 times [2019-11-23 20:20:30,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:30,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968357190] [2019-11-23 20:20:30,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:20:30,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968357190] [2019-11-23 20:20:30,858 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549979318] [2019-11-23 20:20:30,858 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:30,917 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:30,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:30,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:20:30,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:20:30,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:30,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-23 20:20:30,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925880175] [2019-11-23 20:20:30,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-23 20:20:30,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:30,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-23 20:20:30,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:20:30,955 INFO L87 Difference]: Start difference. First operand 115 states and 139 transitions. Second operand 24 states. [2019-11-23 20:20:31,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:31,032 INFO L93 Difference]: Finished difference Result 190 states and 238 transitions. [2019-11-23 20:20:31,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 20:20:31,033 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 82 [2019-11-23 20:20:31,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:31,034 INFO L225 Difference]: With dead ends: 190 [2019-11-23 20:20:31,034 INFO L226 Difference]: Without dead ends: 118 [2019-11-23 20:20:31,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:20:31,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-23 20:20:31,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2019-11-23 20:20:31,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-23 20:20:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2019-11-23 20:20:31,039 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 82 [2019-11-23 20:20:31,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:31,039 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2019-11-23 20:20:31,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-23 20:20:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2019-11-23 20:20:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-23 20:20:31,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:31,040 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:31,244 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:31,244 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:31,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:31,244 INFO L82 PathProgramCache]: Analyzing trace with hash -220195969, now seen corresponding path program 21 times [2019-11-23 20:20:31,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:31,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846264115] [2019-11-23 20:20:31,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2019-11-23 20:20:31,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846264115] [2019-11-23 20:20:31,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969723100] [2019-11-23 20:20:31,508 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:31,612 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:20:31,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:31,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:20:31,615 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 1 proven. 145 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-11-23 20:20:31,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:31,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 13] total 35 [2019-11-23 20:20:31,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218405434] [2019-11-23 20:20:31,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:20:31,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:31,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:20:31,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:20:31,850 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 35 states. [2019-11-23 20:20:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:32,036 INFO L93 Difference]: Finished difference Result 202 states and 256 transitions. [2019-11-23 20:20:32,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:20:32,036 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2019-11-23 20:20:32,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:32,037 INFO L225 Difference]: With dead ends: 202 [2019-11-23 20:20:32,037 INFO L226 Difference]: Without dead ends: 130 [2019-11-23 20:20:32,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:20:32,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-11-23 20:20:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2019-11-23 20:20:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-23 20:20:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2019-11-23 20:20:32,042 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 84 [2019-11-23 20:20:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:32,043 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2019-11-23 20:20:32,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:20:32,043 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2019-11-23 20:20:32,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 20:20:32,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:32,044 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:32,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:32,248 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:32,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:32,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1727048385, now seen corresponding path program 22 times [2019-11-23 20:20:32,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:32,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540743321] [2019-11-23 20:20:32,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:32,528 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-11-23 20:20:32,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540743321] [2019-11-23 20:20:32,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613756160] [2019-11-23 20:20:32,528 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:32,595 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:32,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:32,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:20:32,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-11-23 20:20:32,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:32,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2019-11-23 20:20:32,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647996853] [2019-11-23 20:20:32,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-23 20:20:32,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:32,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-23 20:20:32,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:20:32,627 INFO L87 Difference]: Start difference. First operand 125 states and 151 transitions. Second operand 26 states. [2019-11-23 20:20:32,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:32,706 INFO L93 Difference]: Finished difference Result 206 states and 258 transitions. [2019-11-23 20:20:32,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 20:20:32,707 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 89 [2019-11-23 20:20:32,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:32,708 INFO L225 Difference]: With dead ends: 206 [2019-11-23 20:20:32,708 INFO L226 Difference]: Without dead ends: 128 [2019-11-23 20:20:32,709 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:20:32,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-23 20:20:32,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2019-11-23 20:20:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-23 20:20:32,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2019-11-23 20:20:32,713 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 89 [2019-11-23 20:20:32,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:32,713 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2019-11-23 20:20:32,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-23 20:20:32,714 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2019-11-23 20:20:32,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-23 20:20:32,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:32,715 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:32,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:32,918 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:32,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:32,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1880839169, now seen corresponding path program 23 times [2019-11-23 20:20:32,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:32,919 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768221599] [2019-11-23 20:20:32,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-11-23 20:20:33,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768221599] [2019-11-23 20:20:33,224 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224611418] [2019-11-23 20:20:33,224 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:33,758 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-11-23 20:20:33,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:33,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:20:33,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 1 proven. 176 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-23 20:20:33,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:33,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 38 [2019-11-23 20:20:33,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613328205] [2019-11-23 20:20:33,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:20:33,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:33,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:20:33,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:20:33,981 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand 38 states. [2019-11-23 20:20:34,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:34,144 INFO L93 Difference]: Finished difference Result 218 states and 276 transitions. [2019-11-23 20:20:34,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:20:34,145 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 91 [2019-11-23 20:20:34,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:34,146 INFO L225 Difference]: With dead ends: 218 [2019-11-23 20:20:34,146 INFO L226 Difference]: Without dead ends: 140 [2019-11-23 20:20:34,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=991, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:20:34,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-23 20:20:34,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2019-11-23 20:20:34,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-11-23 20:20:34,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2019-11-23 20:20:34,154 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 91 [2019-11-23 20:20:34,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:34,154 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2019-11-23 20:20:34,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:20:34,155 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2019-11-23 20:20:34,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-11-23 20:20:34,156 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:34,156 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:34,360 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:34,360 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:34,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:34,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1961812219, now seen corresponding path program 24 times [2019-11-23 20:20:34,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:34,361 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934564364] [2019-11-23 20:20:34,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:34,709 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2019-11-23 20:20:34,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934564364] [2019-11-23 20:20:34,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007459955] [2019-11-23 20:20:34,710 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:36,231 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 20:20:36,232 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:36,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:20:36,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 1 proven. 210 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2019-11-23 20:20:36,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:36,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 15] total 40 [2019-11-23 20:20:36,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784023299] [2019-11-23 20:20:36,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:20:36,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:36,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:20:36,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:20:36,526 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand 40 states. [2019-11-23 20:20:36,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:36,753 INFO L93 Difference]: Finished difference Result 232 states and 294 transitions. [2019-11-23 20:20:36,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:20:36,754 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 96 [2019-11-23 20:20:36,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:36,755 INFO L225 Difference]: With dead ends: 232 [2019-11-23 20:20:36,755 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:20:36,757 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:20:36,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:20:36,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2019-11-23 20:20:36,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-11-23 20:20:36,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2019-11-23 20:20:36,762 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 96 [2019-11-23 20:20:36,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:36,763 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2019-11-23 20:20:36,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:20:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2019-11-23 20:20:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 20:20:36,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:36,764 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:36,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:36,969 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:36,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:36,969 INFO L82 PathProgramCache]: Analyzing trace with hash -226001797, now seen corresponding path program 25 times [2019-11-23 20:20:36,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:36,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198962869] [2019-11-23 20:20:36,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-11-23 20:20:37,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198962869] [2019-11-23 20:20:37,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635221999] [2019-11-23 20:20:37,456 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:37,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 20:20:37,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-11-23 20:20:37,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:37,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-11-23 20:20:37,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466631828] [2019-11-23 20:20:37,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 20:20:37,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:37,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 20:20:37,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:20:37,548 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand 29 states. [2019-11-23 20:20:37,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:37,638 INFO L93 Difference]: Finished difference Result 236 states and 296 transitions. [2019-11-23 20:20:37,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:20:37,638 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 101 [2019-11-23 20:20:37,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:37,640 INFO L225 Difference]: With dead ends: 236 [2019-11-23 20:20:37,640 INFO L226 Difference]: Without dead ends: 146 [2019-11-23 20:20:37,641 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:20:37,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-23 20:20:37,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-11-23 20:20:37,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-11-23 20:20:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2019-11-23 20:20:37,664 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 101 [2019-11-23 20:20:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:37,664 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2019-11-23 20:20:37,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 20:20:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2019-11-23 20:20:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-23 20:20:37,665 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:37,665 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:37,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:37,868 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:37,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:37,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1807904583, now seen corresponding path program 26 times [2019-11-23 20:20:37,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:37,869 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376319604] [2019-11-23 20:20:37,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-11-23 20:20:38,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376319604] [2019-11-23 20:20:38,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326501633] [2019-11-23 20:20:38,210 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:38,280 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:38,280 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:38,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-23 20:20:38,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-11-23 20:20:38,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:38,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-11-23 20:20:38,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405545908] [2019-11-23 20:20:38,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-23 20:20:38,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:38,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-23 20:20:38,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:20:38,302 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand 30 states. [2019-11-23 20:20:38,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:38,394 INFO L93 Difference]: Finished difference Result 238 states and 298 transitions. [2019-11-23 20:20:38,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 20:20:38,394 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 103 [2019-11-23 20:20:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:38,395 INFO L225 Difference]: With dead ends: 238 [2019-11-23 20:20:38,395 INFO L226 Difference]: Without dead ends: 148 [2019-11-23 20:20:38,397 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-23 20:20:38,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-23 20:20:38,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2019-11-23 20:20:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-11-23 20:20:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2019-11-23 20:20:38,402 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 103 [2019-11-23 20:20:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:38,403 INFO L462 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2019-11-23 20:20:38,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-23 20:20:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2019-11-23 20:20:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 20:20:38,404 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:38,404 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:38,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:38,608 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:38,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:38,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1598059145, now seen corresponding path program 27 times [2019-11-23 20:20:38,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:38,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131566271] [2019-11-23 20:20:38,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-11-23 20:20:39,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131566271] [2019-11-23 20:20:39,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087199190] [2019-11-23 20:20:39,150 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:39,574 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-11-23 20:20:39,574 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:39,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:20:39,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2019-11-23 20:20:39,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:39,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16] total 44 [2019-11-23 20:20:39,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911034367] [2019-11-23 20:20:39,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:20:39,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:39,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:20:39,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:20:39,885 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand 44 states. [2019-11-23 20:20:40,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:40,118 INFO L93 Difference]: Finished difference Result 250 states and 316 transitions. [2019-11-23 20:20:40,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-23 20:20:40,118 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 105 [2019-11-23 20:20:40,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:40,120 INFO L225 Difference]: With dead ends: 250 [2019-11-23 20:20:40,120 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:20:40,121 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:20:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:20:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 155. [2019-11-23 20:20:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-11-23 20:20:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 187 transitions. [2019-11-23 20:20:40,125 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 187 transitions. Word has length 105 [2019-11-23 20:20:40,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:40,126 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 187 transitions. [2019-11-23 20:20:40,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:20:40,126 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 187 transitions. [2019-11-23 20:20:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-23 20:20:40,127 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:40,127 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:40,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:40,331 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:40,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:40,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1910005517, now seen corresponding path program 28 times [2019-11-23 20:20:40,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:40,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244167362] [2019-11-23 20:20:40,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 20:20:40,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244167362] [2019-11-23 20:20:40,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021396258] [2019-11-23 20:20:40,796 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:40,868 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:40,868 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:40,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 20:20:40,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 20:20:40,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:40,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2019-11-23 20:20:40,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284126480] [2019-11-23 20:20:40,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-23 20:20:40,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:40,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-23 20:20:40,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:20:40,915 INFO L87 Difference]: Start difference. First operand 155 states and 187 transitions. Second operand 32 states. [2019-11-23 20:20:41,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:41,005 INFO L93 Difference]: Finished difference Result 254 states and 318 transitions. [2019-11-23 20:20:41,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 20:20:41,008 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 110 [2019-11-23 20:20:41,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:41,009 INFO L225 Difference]: With dead ends: 254 [2019-11-23 20:20:41,009 INFO L226 Difference]: Without dead ends: 158 [2019-11-23 20:20:41,010 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2019-11-23 20:20:41,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-11-23 20:20:41,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2019-11-23 20:20:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-23 20:20:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 189 transitions. [2019-11-23 20:20:41,015 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 189 transitions. Word has length 110 [2019-11-23 20:20:41,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:41,016 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 189 transitions. [2019-11-23 20:20:41,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-23 20:20:41,016 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 189 transitions. [2019-11-23 20:20:41,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-23 20:20:41,017 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:41,017 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:41,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:41,220 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:41,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:41,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1132605583, now seen corresponding path program 29 times [2019-11-23 20:20:41,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:41,221 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621839147] [2019-11-23 20:20:41,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-23 20:20:41,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621839147] [2019-11-23 20:20:41,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141061883] [2019-11-23 20:20:41,737 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:44,040 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2019-11-23 20:20:44,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:44,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:20:44,048 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1129 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-11-23 20:20:44,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:44,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 17] total 47 [2019-11-23 20:20:44,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706545968] [2019-11-23 20:20:44,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:20:44,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:44,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:20:44,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:20:44,363 INFO L87 Difference]: Start difference. First operand 157 states and 189 transitions. Second operand 47 states. [2019-11-23 20:20:44,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:44,698 INFO L93 Difference]: Finished difference Result 266 states and 336 transitions. [2019-11-23 20:20:44,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:20:44,698 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 112 [2019-11-23 20:20:44,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:44,699 INFO L225 Difference]: With dead ends: 266 [2019-11-23 20:20:44,699 INFO L226 Difference]: Without dead ends: 170 [2019-11-23 20:20:44,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=631, Invalid=1531, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:20:44,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-11-23 20:20:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2019-11-23 20:20:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-11-23 20:20:44,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 199 transitions. [2019-11-23 20:20:44,706 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 199 transitions. Word has length 112 [2019-11-23 20:20:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:44,706 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 199 transitions. [2019-11-23 20:20:44,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:20:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 199 transitions. [2019-11-23 20:20:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-23 20:20:44,707 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:44,707 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:44,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:44,914 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:44,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:44,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1997294257, now seen corresponding path program 30 times [2019-11-23 20:20:44,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:44,915 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681764664] [2019-11-23 20:20:44,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2019-11-23 20:20:45,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681764664] [2019-11-23 20:20:45,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675648231] [2019-11-23 20:20:45,360 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:56,433 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-23 20:20:56,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:56,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:20:56,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:56,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 1 proven. 330 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-11-23 20:20:56,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:56,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 18] total 49 [2019-11-23 20:20:56,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131785646] [2019-11-23 20:20:56,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:20:56,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:56,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:20:56,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:20:56,786 INFO L87 Difference]: Start difference. First operand 165 states and 199 transitions. Second operand 49 states. [2019-11-23 20:20:57,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:57,081 INFO L93 Difference]: Finished difference Result 280 states and 354 transitions. [2019-11-23 20:20:57,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:20:57,083 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 117 [2019-11-23 20:20:57,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:57,085 INFO L225 Difference]: With dead ends: 280 [2019-11-23 20:20:57,085 INFO L226 Difference]: Without dead ends: 178 [2019-11-23 20:20:57,088 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=680, Invalid=1672, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:20:57,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-11-23 20:20:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 173. [2019-11-23 20:20:57,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-11-23 20:20:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 209 transitions. [2019-11-23 20:20:57,110 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 209 transitions. Word has length 117 [2019-11-23 20:20:57,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:57,110 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 209 transitions. [2019-11-23 20:20:57,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:20:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 209 transitions. [2019-11-23 20:20:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-11-23 20:20:57,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:57,112 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:57,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:57,322 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:57,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:57,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1124602733, now seen corresponding path program 31 times [2019-11-23 20:20:57,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:57,323 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304212004] [2019-11-23 20:20:57,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2019-11-23 20:20:57,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304212004] [2019-11-23 20:20:57,850 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905160226] [2019-11-23 20:20:57,850 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:57,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-23 20:20:57,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1338 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2019-11-23 20:20:57,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:57,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-11-23 20:20:57,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458957588] [2019-11-23 20:20:57,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:20:57,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:57,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:20:57,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:20:57,982 INFO L87 Difference]: Start difference. First operand 173 states and 209 transitions. Second operand 35 states. [2019-11-23 20:20:58,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:58,092 INFO L93 Difference]: Finished difference Result 284 states and 356 transitions. [2019-11-23 20:20:58,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:20:58,092 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 122 [2019-11-23 20:20:58,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:58,093 INFO L225 Difference]: With dead ends: 284 [2019-11-23 20:20:58,093 INFO L226 Difference]: Without dead ends: 176 [2019-11-23 20:20:58,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:20:58,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2019-11-23 20:20:58,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2019-11-23 20:20:58,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-23 20:20:58,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2019-11-23 20:20:58,099 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 122 [2019-11-23 20:20:58,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:58,099 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2019-11-23 20:20:58,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:20:58,099 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2019-11-23 20:20:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-23 20:20:58,100 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:58,100 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:58,303 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:58,304 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:58,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1878625045, now seen corresponding path program 32 times [2019-11-23 20:20:58,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:58,305 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957328889] [2019-11-23 20:20:58,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2019-11-23 20:20:58,788 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957328889] [2019-11-23 20:20:58,789 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579387262] [2019-11-23 20:20:58,789 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:58,860 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:58,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:58,862 INFO L255 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-23 20:20:58,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:58,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2019-11-23 20:20:58,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:58,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2019-11-23 20:20:58,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945115828] [2019-11-23 20:20:58,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:20:58,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:58,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:20:58,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:20:58,882 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand 36 states. [2019-11-23 20:20:58,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:58,984 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2019-11-23 20:20:58,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:20:58,985 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 124 [2019-11-23 20:20:58,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:58,986 INFO L225 Difference]: With dead ends: 286 [2019-11-23 20:20:58,986 INFO L226 Difference]: Without dead ends: 178 [2019-11-23 20:20:58,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:20:58,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2019-11-23 20:20:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2019-11-23 20:20:58,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-11-23 20:20:58,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 213 transitions. [2019-11-23 20:20:58,991 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 213 transitions. Word has length 124 [2019-11-23 20:20:58,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:58,992 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 213 transitions. [2019-11-23 20:20:58,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:20:58,992 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 213 transitions. [2019-11-23 20:20:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-23 20:20:58,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:58,993 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:59,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:59,197 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:59,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:59,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1762496791, now seen corresponding path program 33 times [2019-11-23 20:20:59,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:59,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122849909] [2019-11-23 20:20:59,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:59,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2019-11-23 20:20:59,881 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122849909] [2019-11-23 20:20:59,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331773498] [2019-11-23 20:20:59,882 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:00,377 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-11-23 20:21:00,377 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:00,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:21:00,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1466 backedges. 1 proven. 376 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2019-11-23 20:21:00,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:00,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 19] total 53 [2019-11-23 20:21:00,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971583437] [2019-11-23 20:21:00,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-23 20:21:00,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:00,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-23 20:21:00,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=800, Invalid=1956, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:21:00,972 INFO L87 Difference]: Start difference. First operand 177 states and 213 transitions. Second operand 53 states. [2019-11-23 20:21:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:01,252 INFO L93 Difference]: Finished difference Result 298 states and 376 transitions. [2019-11-23 20:21:01,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 20:21:01,253 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 126 [2019-11-23 20:21:01,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:01,254 INFO L225 Difference]: With dead ends: 298 [2019-11-23 20:21:01,254 INFO L226 Difference]: Without dead ends: 190 [2019-11-23 20:21:01,255 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=800, Invalid=1956, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:21:01,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2019-11-23 20:21:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 185. [2019-11-23 20:21:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-11-23 20:21:01,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 223 transitions. [2019-11-23 20:21:01,259 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 223 transitions. Word has length 126 [2019-11-23 20:21:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:01,259 INFO L462 AbstractCegarLoop]: Abstraction has 185 states and 223 transitions. [2019-11-23 20:21:01,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-23 20:21:01,260 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 223 transitions. [2019-11-23 20:21:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-23 20:21:01,260 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:01,261 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:01,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:01,465 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:01,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:01,465 INFO L82 PathProgramCache]: Analyzing trace with hash 247814313, now seen corresponding path program 34 times [2019-11-23 20:21:01,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:01,466 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882489342] [2019-11-23 20:21:01,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:02,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2019-11-23 20:21:02,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882489342] [2019-11-23 20:21:02,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527436624] [2019-11-23 20:21:02,039 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:02,140 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:21:02,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:02,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 20:21:02,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1582 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2019-11-23 20:21:02,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:02,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2019-11-23 20:21:02,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267249230] [2019-11-23 20:21:02,170 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-23 20:21:02,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:02,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-23 20:21:02,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:21:02,171 INFO L87 Difference]: Start difference. First operand 185 states and 223 transitions. Second operand 38 states. [2019-11-23 20:21:02,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:02,304 INFO L93 Difference]: Finished difference Result 302 states and 378 transitions. [2019-11-23 20:21:02,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 20:21:02,306 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 131 [2019-11-23 20:21:02,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:02,307 INFO L225 Difference]: With dead ends: 302 [2019-11-23 20:21:02,308 INFO L226 Difference]: Without dead ends: 188 [2019-11-23 20:21:02,308 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 20:21:02,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-11-23 20:21:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2019-11-23 20:21:02,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2019-11-23 20:21:02,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 225 transitions. [2019-11-23 20:21:02,313 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 225 transitions. Word has length 131 [2019-11-23 20:21:02,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:02,313 INFO L462 AbstractCegarLoop]: Abstraction has 187 states and 225 transitions. [2019-11-23 20:21:02,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-23 20:21:02,314 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 225 transitions. [2019-11-23 20:21:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-23 20:21:02,314 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:02,315 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:02,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:02,518 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:02,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:02,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1912542105, now seen corresponding path program 35 times [2019-11-23 20:21:02,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:02,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484224316] [2019-11-23 20:21:02,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2019-11-23 20:21:03,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484224316] [2019-11-23 20:21:03,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667911574] [2019-11-23 20:21:03,052 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:04,711 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2019-11-23 20:21:04,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:04,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:21:04,718 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:05,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1651 backedges. 1 proven. 425 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2019-11-23 20:21:05,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:05,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 20] total 56 [2019-11-23 20:21:05,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497998113] [2019-11-23 20:21:05,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-11-23 20:21:05,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:05,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-11-23 20:21:05,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=2188, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:21:05,139 INFO L87 Difference]: Start difference. First operand 187 states and 225 transitions. Second operand 56 states. [2019-11-23 20:21:05,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:05,438 INFO L93 Difference]: Finished difference Result 314 states and 396 transitions. [2019-11-23 20:21:05,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-11-23 20:21:05,439 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 133 [2019-11-23 20:21:05,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:05,440 INFO L225 Difference]: With dead ends: 314 [2019-11-23 20:21:05,440 INFO L226 Difference]: Without dead ends: 200 [2019-11-23 20:21:05,442 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=892, Invalid=2188, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:21:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-11-23 20:21:05,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 195. [2019-11-23 20:21:05,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-11-23 20:21:05,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 235 transitions. [2019-11-23 20:21:05,446 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 235 transitions. Word has length 133 [2019-11-23 20:21:05,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:05,446 INFO L462 AbstractCegarLoop]: Abstraction has 195 states and 235 transitions. [2019-11-23 20:21:05,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-11-23 20:21:05,447 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 235 transitions. [2019-11-23 20:21:05,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-23 20:21:05,447 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:05,448 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:05,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:05,655 INFO L410 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:05,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:05,655 INFO L82 PathProgramCache]: Analyzing trace with hash 550249245, now seen corresponding path program 36 times [2019-11-23 20:21:05,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:05,656 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993795305] [2019-11-23 20:21:05,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2019-11-23 20:21:06,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993795305] [2019-11-23 20:21:06,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943470388] [2019-11-23 20:21:06,317 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:13,619 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-11-23 20:21:13,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:13,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-23 20:21:13,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1774 backedges. 1 proven. 477 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2019-11-23 20:21:14,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:14,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 21] total 58 [2019-11-23 20:21:14,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394637423] [2019-11-23 20:21:14,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-23 20:21:14,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:14,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-23 20:21:14,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=2356, Unknown=0, NotChecked=0, Total=3306 [2019-11-23 20:21:14,066 INFO L87 Difference]: Start difference. First operand 195 states and 235 transitions. Second operand 58 states. [2019-11-23 20:21:14,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:14,394 INFO L93 Difference]: Finished difference Result 328 states and 414 transitions. [2019-11-23 20:21:14,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-23 20:21:14,395 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 138 [2019-11-23 20:21:14,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:14,396 INFO L225 Difference]: With dead ends: 328 [2019-11-23 20:21:14,396 INFO L226 Difference]: Without dead ends: 208 [2019-11-23 20:21:14,397 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=950, Invalid=2356, Unknown=0, NotChecked=0, Total=3306 [2019-11-23 20:21:14,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-11-23 20:21:14,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2019-11-23 20:21:14,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2019-11-23 20:21:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 245 transitions. [2019-11-23 20:21:14,401 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 245 transitions. Word has length 138 [2019-11-23 20:21:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:14,402 INFO L462 AbstractCegarLoop]: Abstraction has 203 states and 245 transitions. [2019-11-23 20:21:14,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-23 20:21:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 245 transitions. [2019-11-23 20:21:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-23 20:21:14,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:14,403 INFO L410 BasicCegarLoop]: trace histogram [37, 37, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:14,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:14,611 INFO L410 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:14,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:14,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1969531933, now seen corresponding path program 37 times [2019-11-23 20:21:14,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:14,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628354990] [2019-11-23 20:21:14,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:15,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-11-23 20:21:15,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628354990] [2019-11-23 20:21:15,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078066528] [2019-11-23 20:21:15,370 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:15,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:21:15,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1902 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-11-23 20:21:15,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:15,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-11-23 20:21:15,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231699994] [2019-11-23 20:21:15,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 20:21:15,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:15,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 20:21:15,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:21:15,497 INFO L87 Difference]: Start difference. First operand 203 states and 245 transitions. Second operand 41 states. [2019-11-23 20:21:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:15,642 INFO L93 Difference]: Finished difference Result 332 states and 416 transitions. [2019-11-23 20:21:15,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:21:15,642 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 143 [2019-11-23 20:21:15,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:15,643 INFO L225 Difference]: With dead ends: 332 [2019-11-23 20:21:15,643 INFO L226 Difference]: Without dead ends: 206 [2019-11-23 20:21:15,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 20:21:15,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-23 20:21:15,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2019-11-23 20:21:15,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-11-23 20:21:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 247 transitions. [2019-11-23 20:21:15,647 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 247 transitions. Word has length 143 [2019-11-23 20:21:15,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:15,647 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 247 transitions. [2019-11-23 20:21:15,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 20:21:15,647 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 247 transitions. [2019-11-23 20:21:15,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-23 20:21:15,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:15,648 INFO L410 BasicCegarLoop]: trace histogram [38, 38, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:15,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:15,849 INFO L410 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1263614625, now seen corresponding path program 38 times [2019-11-23 20:21:15,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:15,850 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011324242] [2019-11-23 20:21:15,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-11-23 20:21:16,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011324242] [2019-11-23 20:21:16,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821269081] [2019-11-23 20:21:16,709 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:16,792 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:21:16,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:16,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-23 20:21:16,798 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1977 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-11-23 20:21:16,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:16,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2019-11-23 20:21:16,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566615099] [2019-11-23 20:21:16,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-23 20:21:16,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:16,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-23 20:21:16,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:21:16,823 INFO L87 Difference]: Start difference. First operand 205 states and 247 transitions. Second operand 42 states. [2019-11-23 20:21:16,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:16,963 INFO L93 Difference]: Finished difference Result 334 states and 418 transitions. [2019-11-23 20:21:16,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 20:21:16,964 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 145 [2019-11-23 20:21:16,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:16,965 INFO L225 Difference]: With dead ends: 334 [2019-11-23 20:21:16,965 INFO L226 Difference]: Without dead ends: 208 [2019-11-23 20:21:16,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-23 20:21:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2019-11-23 20:21:16,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2019-11-23 20:21:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-11-23 20:21:16,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 249 transitions. [2019-11-23 20:21:16,969 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 249 transitions. Word has length 145 [2019-11-23 20:21:16,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:16,969 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 249 transitions. [2019-11-23 20:21:16,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-23 20:21:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 249 transitions. [2019-11-23 20:21:16,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-23 20:21:16,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:16,971 INFO L410 BasicCegarLoop]: trace histogram [39, 39, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:17,174 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:17,174 INFO L410 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:17,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:17,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1238865441, now seen corresponding path program 39 times [2019-11-23 20:21:17,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:17,175 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10208763] [2019-11-23 20:21:17,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-11-23 20:21:17,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10208763] [2019-11-23 20:21:17,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649331246] [2019-11-23 20:21:17,887 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:18,567 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2019-11-23 20:21:18,568 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:18,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:21:18,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1 proven. 532 refuted. 0 times theorem prover too weak. 1521 trivial. 0 not checked. [2019-11-23 20:21:19,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:19,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 22] total 62 [2019-11-23 20:21:19,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434761703] [2019-11-23 20:21:19,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-11-23 20:21:19,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:19,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-11-23 20:21:19,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1091, Invalid=2691, Unknown=0, NotChecked=0, Total=3782 [2019-11-23 20:21:19,043 INFO L87 Difference]: Start difference. First operand 207 states and 249 transitions. Second operand 62 states. [2019-11-23 20:21:19,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:19,421 INFO L93 Difference]: Finished difference Result 346 states and 436 transitions. [2019-11-23 20:21:19,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-11-23 20:21:19,421 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 147 [2019-11-23 20:21:19,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:19,424 INFO L225 Difference]: With dead ends: 346 [2019-11-23 20:21:19,424 INFO L226 Difference]: Without dead ends: 220 [2019-11-23 20:21:19,425 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1091, Invalid=2691, Unknown=0, NotChecked=0, Total=3782 [2019-11-23 20:21:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2019-11-23 20:21:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 215. [2019-11-23 20:21:19,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2019-11-23 20:21:19,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 259 transitions. [2019-11-23 20:21:19,430 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 259 transitions. Word has length 147 [2019-11-23 20:21:19,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:19,430 INFO L462 AbstractCegarLoop]: Abstraction has 215 states and 259 transitions. [2019-11-23 20:21:19,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-11-23 20:21:19,430 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 259 transitions. [2019-11-23 20:21:19,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-23 20:21:19,431 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:19,431 INFO L410 BasicCegarLoop]: trace histogram [40, 40, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:19,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:19,636 INFO L410 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:19,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:19,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1663543077, now seen corresponding path program 40 times [2019-11-23 20:21:19,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:19,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058389711] [2019-11-23 20:21:19,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2019-11-23 20:21:20,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058389711] [2019-11-23 20:21:20,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294955044] [2019-11-23 20:21:20,425 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:20,514 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:21:20,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:20,516 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-23 20:21:20,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2191 backedges. 1 proven. 590 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2019-11-23 20:21:21,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:21,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 23] total 64 [2019-11-23 20:21:21,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644614125] [2019-11-23 20:21:21,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-11-23 20:21:21,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:21,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-11-23 20:21:21,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=2877, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 20:21:21,126 INFO L87 Difference]: Start difference. First operand 215 states and 259 transitions. Second operand 64 states. [2019-11-23 20:21:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:21,492 INFO L93 Difference]: Finished difference Result 360 states and 454 transitions. [2019-11-23 20:21:21,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-11-23 20:21:21,493 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 152 [2019-11-23 20:21:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:21,494 INFO L225 Difference]: With dead ends: 360 [2019-11-23 20:21:21,494 INFO L226 Difference]: Without dead ends: 228 [2019-11-23 20:21:21,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1155, Invalid=2877, Unknown=0, NotChecked=0, Total=4032 [2019-11-23 20:21:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2019-11-23 20:21:21,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 223. [2019-11-23 20:21:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-11-23 20:21:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 269 transitions. [2019-11-23 20:21:21,501 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 269 transitions. Word has length 152 [2019-11-23 20:21:21,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:21,502 INFO L462 AbstractCegarLoop]: Abstraction has 223 states and 269 transitions. [2019-11-23 20:21:21,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-11-23 20:21:21,502 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 269 transitions. [2019-11-23 20:21:21,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-23 20:21:21,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:21,503 INFO L410 BasicCegarLoop]: trace histogram [41, 41, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:21,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:21,707 INFO L410 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:21,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:21,707 INFO L82 PathProgramCache]: Analyzing trace with hash -220975525, now seen corresponding path program 41 times [2019-11-23 20:21:21,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:21,708 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079472325] [2019-11-23 20:21:21,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2333 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2019-11-23 20:21:22,522 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079472325] [2019-11-23 20:21:22,522 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299156655] [2019-11-23 20:21:22,522 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:30,844 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2019-11-23 20:21:30,844 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:30,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 20:21:30,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:31,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2333 backedges. 1 proven. 651 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2019-11-23 20:21:31,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:31,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 24] total 66 [2019-11-23 20:21:31,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203460414] [2019-11-23 20:21:31,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-11-23 20:21:31,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:31,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-11-23 20:21:31,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1221, Invalid=3069, Unknown=0, NotChecked=0, Total=4290 [2019-11-23 20:21:31,440 INFO L87 Difference]: Start difference. First operand 223 states and 269 transitions. Second operand 66 states. [2019-11-23 20:21:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:31,808 INFO L93 Difference]: Finished difference Result 374 states and 472 transitions. [2019-11-23 20:21:31,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-11-23 20:21:31,808 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 157 [2019-11-23 20:21:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:31,810 INFO L225 Difference]: With dead ends: 374 [2019-11-23 20:21:31,810 INFO L226 Difference]: Without dead ends: 236 [2019-11-23 20:21:31,811 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1221, Invalid=3069, Unknown=0, NotChecked=0, Total=4290 [2019-11-23 20:21:31,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-11-23 20:21:31,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 231. [2019-11-23 20:21:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2019-11-23 20:21:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 279 transitions. [2019-11-23 20:21:31,815 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 279 transitions. Word has length 157 [2019-11-23 20:21:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:31,815 INFO L462 AbstractCegarLoop]: Abstraction has 231 states and 279 transitions. [2019-11-23 20:21:31,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-11-23 20:21:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 279 transitions. [2019-11-23 20:21:31,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-23 20:21:31,816 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:31,816 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:32,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:32,028 INFO L410 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:32,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:32,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1881917097, now seen corresponding path program 42 times [2019-11-23 20:21:32,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:32,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464269885] [2019-11-23 20:21:32,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 20:21:32,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464269885] [2019-11-23 20:21:32,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290329565] [2019-11-23 20:21:32,843 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:44,793 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2019-11-23 20:21:44,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:44,801 INFO L255 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 44 conjunts are in the unsatisfiable core [2019-11-23 20:21:44,803 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 20:21:44,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:44,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2019-11-23 20:21:44,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522854368] [2019-11-23 20:21:44,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:21:44,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:44,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:21:44,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:21:44,849 INFO L87 Difference]: Start difference. First operand 231 states and 279 transitions. Second operand 46 states. [2019-11-23 20:21:45,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:45,019 INFO L93 Difference]: Finished difference Result 378 states and 474 transitions. [2019-11-23 20:21:45,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 20:21:45,019 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 162 [2019-11-23 20:21:45,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:45,021 INFO L225 Difference]: With dead ends: 378 [2019-11-23 20:21:45,021 INFO L226 Difference]: Without dead ends: 234 [2019-11-23 20:21:45,022 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:21:45,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2019-11-23 20:21:45,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2019-11-23 20:21:45,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2019-11-23 20:21:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 281 transitions. [2019-11-23 20:21:45,029 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 281 transitions. Word has length 162 [2019-11-23 20:21:45,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:45,029 INFO L462 AbstractCegarLoop]: Abstraction has 233 states and 281 transitions. [2019-11-23 20:21:45,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:21:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 281 transitions. [2019-11-23 20:21:45,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-23 20:21:45,031 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:45,031 INFO L410 BasicCegarLoop]: trace histogram [43, 43, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:45,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:45,243 INFO L410 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:45,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:45,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1844626645, now seen corresponding path program 43 times [2019-11-23 20:21:45,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:45,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868168016] [2019-11-23 20:21:45,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:45,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 20:21:46,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868168016] [2019-11-23 20:21:46,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555070617] [2019-11-23 20:21:46,548 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:46,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-23 20:21:46,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2565 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 20:21:46,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:46,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2019-11-23 20:21:46,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543831200] [2019-11-23 20:21:46,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 20:21:46,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:46,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 20:21:46,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:21:46,663 INFO L87 Difference]: Start difference. First operand 233 states and 281 transitions. Second operand 47 states. [2019-11-23 20:21:46,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:46,804 INFO L93 Difference]: Finished difference Result 380 states and 476 transitions. [2019-11-23 20:21:46,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 20:21:46,805 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 164 [2019-11-23 20:21:46,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:46,806 INFO L225 Difference]: With dead ends: 380 [2019-11-23 20:21:46,806 INFO L226 Difference]: Without dead ends: 236 [2019-11-23 20:21:46,810 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 20:21:46,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2019-11-23 20:21:46,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2019-11-23 20:21:46,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2019-11-23 20:21:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 283 transitions. [2019-11-23 20:21:46,815 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 283 transitions. Word has length 164 [2019-11-23 20:21:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:46,815 INFO L462 AbstractCegarLoop]: Abstraction has 235 states and 283 transitions. [2019-11-23 20:21:46,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 20:21:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 283 transitions. [2019-11-23 20:21:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-23 20:21:46,816 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:46,816 INFO L410 BasicCegarLoop]: trace histogram [44, 44, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:47,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:47,020 INFO L410 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:47,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:47,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1050437843, now seen corresponding path program 44 times [2019-11-23 20:21:47,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:47,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518518789] [2019-11-23 20:21:47,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 20:21:48,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518518789] [2019-11-23 20:21:48,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078625280] [2019-11-23 20:21:48,326 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:48,423 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:21:48,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:48,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-23 20:21:48,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 20:21:48,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:48,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2019-11-23 20:21:48,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499496403] [2019-11-23 20:21:48,462 INFO L442 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-11-23 20:21:48,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:48,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-11-23 20:21:48,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:21:48,466 INFO L87 Difference]: Start difference. First operand 235 states and 283 transitions. Second operand 48 states. [2019-11-23 20:21:48,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:48,597 INFO L93 Difference]: Finished difference Result 382 states and 478 transitions. [2019-11-23 20:21:48,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 20:21:48,598 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 166 [2019-11-23 20:21:48,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:48,599 INFO L225 Difference]: With dead ends: 382 [2019-11-23 20:21:48,599 INFO L226 Difference]: Without dead ends: 238 [2019-11-23 20:21:48,600 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2019-11-23 20:21:48,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2019-11-23 20:21:48,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2019-11-23 20:21:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2019-11-23 20:21:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 285 transitions. [2019-11-23 20:21:48,605 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 285 transitions. Word has length 166 [2019-11-23 20:21:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:48,605 INFO L462 AbstractCegarLoop]: Abstraction has 237 states and 285 transitions. [2019-11-23 20:21:48,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-11-23 20:21:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 285 transitions. [2019-11-23 20:21:48,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2019-11-23 20:21:48,606 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:48,607 INFO L410 BasicCegarLoop]: trace histogram [45, 45, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:48,810 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:48,811 INFO L410 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:48,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:48,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1955789487, now seen corresponding path program 45 times [2019-11-23 20:21:48,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:48,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96043104] [2019-11-23 20:21:48,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2741 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2019-11-23 20:21:49,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96043104] [2019-11-23 20:21:49,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565318978] [2019-11-23 20:21:49,652 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:51,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-11-23 20:21:51,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:51,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 20:21:51,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2741 backedges. 1 proven. 715 refuted. 0 times theorem prover too weak. 2025 trivial. 0 not checked. [2019-11-23 20:21:51,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:51,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 25] total 71 [2019-11-23 20:21:51,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266275369] [2019-11-23 20:21:51,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-11-23 20:21:51,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:51,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-11-23 20:21:51,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1427, Invalid=3543, Unknown=0, NotChecked=0, Total=4970 [2019-11-23 20:21:51,843 INFO L87 Difference]: Start difference. First operand 237 states and 285 transitions. Second operand 71 states. [2019-11-23 20:21:52,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:52,276 INFO L93 Difference]: Finished difference Result 394 states and 496 transitions. [2019-11-23 20:21:52,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-11-23 20:21:52,276 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 168 [2019-11-23 20:21:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:52,277 INFO L225 Difference]: With dead ends: 394 [2019-11-23 20:21:52,277 INFO L226 Difference]: Without dead ends: 250 [2019-11-23 20:21:52,278 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1427, Invalid=3543, Unknown=0, NotChecked=0, Total=4970 [2019-11-23 20:21:52,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2019-11-23 20:21:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 245. [2019-11-23 20:21:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-11-23 20:21:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 295 transitions. [2019-11-23 20:21:52,282 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 295 transitions. Word has length 168 [2019-11-23 20:21:52,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:52,282 INFO L462 AbstractCegarLoop]: Abstraction has 245 states and 295 transitions. [2019-11-23 20:21:52,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-11-23 20:21:52,282 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 295 transitions. [2019-11-23 20:21:52,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-23 20:21:52,283 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:52,283 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:52,483 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:52,484 INFO L410 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:52,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1258063215, now seen corresponding path program 46 times [2019-11-23 20:21:52,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:52,485 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865371329] [2019-11-23 20:21:52,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2899 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-11-23 20:21:53,426 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865371329] [2019-11-23 20:21:53,427 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670361571] [2019-11-23 20:21:53,427 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:53,528 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:21:53,528 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:53,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-23 20:21:53,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2899 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-11-23 20:21:53,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:53,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2019-11-23 20:21:53,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352386621] [2019-11-23 20:21:53,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-11-23 20:21:53,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:53,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-11-23 20:21:53,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:21:53,560 INFO L87 Difference]: Start difference. First operand 245 states and 295 transitions. Second operand 50 states. [2019-11-23 20:21:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:53,734 INFO L93 Difference]: Finished difference Result 398 states and 498 transitions. [2019-11-23 20:21:53,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:21:53,734 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 173 [2019-11-23 20:21:53,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:53,735 INFO L225 Difference]: With dead ends: 398 [2019-11-23 20:21:53,735 INFO L226 Difference]: Without dead ends: 248 [2019-11-23 20:21:53,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:21:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-11-23 20:21:53,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2019-11-23 20:21:53,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2019-11-23 20:21:53,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 297 transitions. [2019-11-23 20:21:53,742 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 297 transitions. Word has length 173 [2019-11-23 20:21:53,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:53,742 INFO L462 AbstractCegarLoop]: Abstraction has 247 states and 297 transitions. [2019-11-23 20:21:53,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-11-23 20:21:53,742 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 297 transitions. [2019-11-23 20:21:53,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-23 20:21:53,743 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:53,743 INFO L410 BasicCegarLoop]: trace histogram [47, 47, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:53,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:53,947 INFO L410 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:53,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1280868145, now seen corresponding path program 47 times [2019-11-23 20:21:53,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:53,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487221925] [2019-11-23 20:21:53,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat