/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:55:41,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:55:41,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:55:41,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:55:41,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:55:41,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:55:41,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:55:41,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:55:41,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:55:41,755 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:55:41,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:55:41,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:55:41,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:55:41,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:55:41,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:55:41,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:55:41,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:55:41,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:55:41,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:55:41,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:55:41,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:55:41,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:55:41,784 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:55:41,785 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:55:41,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:55:41,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:55:41,794 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:55:41,795 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:55:41,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:55:41,798 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:55:41,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:55:41,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:55:41,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:55:41,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:55:41,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:55:41,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:55:41,809 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:55:41,861 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:55:41,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:55:41,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:55:41,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:55:41,866 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:55:41,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:55:41,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:55:41,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:55:41,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:55:41,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:55:41,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:55:41,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:55:41,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:55:41,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:55:41,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:55:41,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:55:41,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:55:41,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:55:41,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:55:41,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:55:41,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:55:41,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:55:41,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:55:41,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:55:41,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:55:41,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:55:42,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:55:42,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:55:42,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:55:42,264 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:55:42,264 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:55:42,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c [2020-12-22 09:55:42,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57bcd64f6/d1325a171a9d404799c73af651b8ab11/FLAG552e45846 [2020-12-22 09:55:43,397 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:55:43,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c [2020-12-22 09:55:43,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57bcd64f6/d1325a171a9d404799c73af651b8ab11/FLAG552e45846 [2020-12-22 09:55:43,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57bcd64f6/d1325a171a9d404799c73af651b8ab11 [2020-12-22 09:55:43,803 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:55:43,807 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:55:43,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:55:43,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:55:43,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:55:43,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:55:43" (1/1) ... [2020-12-22 09:55:43,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e1fd1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:43, skipping insertion in model container [2020-12-22 09:55:43,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:55:43" (1/1) ... [2020-12-22 09:55:43,834 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:55:44,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:55:44,402 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c[11730,11743] [2020-12-22 09:55:44,425 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c[12329,12342] [2020-12-22 09:55:45,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:55:45,446 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:55:45,524 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c[11730,11743] [2020-12-22 09:55:45,528 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c[12329,12342] [2020-12-22 09:55:46,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:55:46,192 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:55:46,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:46 WrapperNode [2020-12-22 09:55:46,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:55:46,195 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:55:46,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:55:46,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:55:46,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:46" (1/1) ... [2020-12-22 09:55:46,275 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:46" (1/1) ... [2020-12-22 09:55:46,690 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:55:46,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:55:46,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:55:46,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:55:46,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:46" (1/1) ... [2020-12-22 09:55:46,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:46" (1/1) ... [2020-12-22 09:55:46,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:46" (1/1) ... [2020-12-22 09:55:46,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:46" (1/1) ... [2020-12-22 09:55:47,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:46" (1/1) ... [2020-12-22 09:55:47,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:46" (1/1) ... [2020-12-22 09:55:47,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:46" (1/1) ... [2020-12-22 09:55:47,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:55:47,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:55:47,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:55:47,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:55:47,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:46" (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 [2020-12-22 09:55:47,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:55:47,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:55:47,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:55:47,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:55:52,817 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:55:52,818 INFO L299 CfgBuilder]: Removed 36 assume(true) statements. [2020-12-22 09:55:52,824 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:55:52 BoogieIcfgContainer [2020-12-22 09:55:52,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:55:52,826 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:55:52,829 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:55:52,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:55:52,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:55:43" (1/3) ... [2020-12-22 09:55:52,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c738c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:55:52, skipping insertion in model container [2020-12-22 09:55:52,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:55:46" (2/3) ... [2020-12-22 09:55:52,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c738c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:55:52, skipping insertion in model container [2020-12-22 09:55:52,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:55:52" (3/3) ... [2020-12-22 09:55:52,836 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c [2020-12-22 09:55:52,846 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:55:52,853 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 09:55:52,872 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 09:55:52,916 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:55:52,916 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:55:52,916 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:55:52,916 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:55:52,916 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:55:52,917 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:55:52,917 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:55:52,917 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:55:52,959 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states. [2020-12-22 09:55:52,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 09:55:52,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:52,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:52,967 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:52,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:52,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2089036915, now seen corresponding path program 1 times [2020-12-22 09:55:52,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:52,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480618669] [2020-12-22 09:55:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:53,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480618669] [2020-12-22 09:55:53,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:53,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:55:53,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144453893] [2020-12-22 09:55:53,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:55:53,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:53,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:55:53,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:53,306 INFO L87 Difference]: Start difference. First operand 909 states. Second operand 3 states. [2020-12-22 09:55:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:59,272 INFO L93 Difference]: Finished difference Result 2536 states and 4876 transitions. [2020-12-22 09:55:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:55:59,274 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 09:55:59,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:59,316 INFO L225 Difference]: With dead ends: 2536 [2020-12-22 09:55:59,317 INFO L226 Difference]: Without dead ends: 1594 [2020-12-22 09:55:59,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:55:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-12-22 09:55:59,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2020-12-22 09:55:59,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1594 states. [2020-12-22 09:55:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2496 transitions. [2020-12-22 09:55:59,475 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2496 transitions. Word has length 7 [2020-12-22 09:55:59,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:59,476 INFO L481 AbstractCegarLoop]: Abstraction has 1594 states and 2496 transitions. [2020-12-22 09:55:59,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:55:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2496 transitions. [2020-12-22 09:55:59,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 09:55:59,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:59,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:59,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:55:59,482 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:59,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:59,485 INFO L82 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2020-12-22 09:55:59,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:59,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604519986] [2020-12-22 09:55:59,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:55:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:55:59,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604519986] [2020-12-22 09:55:59,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:55:59,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:55:59,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028931802] [2020-12-22 09:55:59,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:55:59,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:55:59,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:55:59,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:55:59,701 INFO L87 Difference]: Start difference. First operand 1594 states and 2496 transitions. Second operand 5 states. [2020-12-22 09:55:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:55:59,811 INFO L93 Difference]: Finished difference Result 1650 states and 2582 transitions. [2020-12-22 09:55:59,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:55:59,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-12-22 09:55:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:55:59,822 INFO L225 Difference]: With dead ends: 1650 [2020-12-22 09:55:59,822 INFO L226 Difference]: Without dead ends: 1594 [2020-12-22 09:55:59,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:55:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2020-12-22 09:55:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2020-12-22 09:55:59,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1594 states. [2020-12-22 09:55:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2465 transitions. [2020-12-22 09:55:59,874 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2465 transitions. Word has length 34 [2020-12-22 09:55:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:55:59,875 INFO L481 AbstractCegarLoop]: Abstraction has 1594 states and 2465 transitions. [2020-12-22 09:55:59,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:55:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2465 transitions. [2020-12-22 09:55:59,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:55:59,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:55:59,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:55:59,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:55:59,885 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:55:59,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:55:59,887 INFO L82 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2020-12-22 09:55:59,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:55:59,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910083890] [2020-12-22 09:55:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:55:59,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:00,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910083890] [2020-12-22 09:56:00,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:00,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:00,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300804235] [2020-12-22 09:56:00,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:00,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:00,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:00,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:00,018 INFO L87 Difference]: Start difference. First operand 1594 states and 2465 transitions. Second operand 3 states. [2020-12-22 09:56:00,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:00,064 INFO L93 Difference]: Finished difference Result 1692 states and 2619 transitions. [2020-12-22 09:56:00,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:00,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:56:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:00,075 INFO L225 Difference]: With dead ends: 1692 [2020-12-22 09:56:00,076 INFO L226 Difference]: Without dead ends: 1640 [2020-12-22 09:56:00,080 INFO L677 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 [2020-12-22 09:56:00,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2020-12-22 09:56:00,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1638. [2020-12-22 09:56:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1638 states. [2020-12-22 09:56:00,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2535 transitions. [2020-12-22 09:56:00,135 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2535 transitions. Word has length 64 [2020-12-22 09:56:00,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:00,136 INFO L481 AbstractCegarLoop]: Abstraction has 1638 states and 2535 transitions. [2020-12-22 09:56:00,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:00,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2535 transitions. [2020-12-22 09:56:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:00,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:00,142 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:00,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 09:56:00,142 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:00,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:00,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2020-12-22 09:56:00,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:00,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68642628] [2020-12-22 09:56:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:00,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:00,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68642628] [2020-12-22 09:56:00,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:00,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:00,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304293756] [2020-12-22 09:56:00,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:00,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:00,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:00,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:00,259 INFO L87 Difference]: Start difference. First operand 1638 states and 2535 transitions. Second operand 3 states. [2020-12-22 09:56:00,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:00,304 INFO L93 Difference]: Finished difference Result 1818 states and 2819 transitions. [2020-12-22 09:56:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:00,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:56:00,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:00,315 INFO L225 Difference]: With dead ends: 1818 [2020-12-22 09:56:00,315 INFO L226 Difference]: Without dead ends: 1722 [2020-12-22 09:56:00,316 INFO L677 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 [2020-12-22 09:56:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2020-12-22 09:56:00,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1720. [2020-12-22 09:56:00,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1720 states. [2020-12-22 09:56:00,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 2664 transitions. [2020-12-22 09:56:00,422 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 2664 transitions. Word has length 64 [2020-12-22 09:56:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:00,422 INFO L481 AbstractCegarLoop]: Abstraction has 1720 states and 2664 transitions. [2020-12-22 09:56:00,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 2664 transitions. [2020-12-22 09:56:00,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:00,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:00,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:00,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 09:56:00,424 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:00,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:00,425 INFO L82 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2020-12-22 09:56:00,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:00,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824046138] [2020-12-22 09:56:00,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:00,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824046138] [2020-12-22 09:56:00,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:00,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:00,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304201048] [2020-12-22 09:56:00,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:00,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:00,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:00,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:00,539 INFO L87 Difference]: Start difference. First operand 1720 states and 2664 transitions. Second operand 3 states. [2020-12-22 09:56:00,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:00,594 INFO L93 Difference]: Finished difference Result 2052 states and 3186 transitions. [2020-12-22 09:56:00,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:00,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:56:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:00,606 INFO L225 Difference]: With dead ends: 2052 [2020-12-22 09:56:00,607 INFO L226 Difference]: Without dead ends: 1874 [2020-12-22 09:56:00,608 INFO L677 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 [2020-12-22 09:56:00,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2020-12-22 09:56:00,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1872. [2020-12-22 09:56:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2020-12-22 09:56:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2900 transitions. [2020-12-22 09:56:00,673 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2900 transitions. Word has length 64 [2020-12-22 09:56:00,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:00,674 INFO L481 AbstractCegarLoop]: Abstraction has 1872 states and 2900 transitions. [2020-12-22 09:56:00,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2900 transitions. [2020-12-22 09:56:00,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:00,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:00,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:00,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 09:56:00,677 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:00,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:00,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2020-12-22 09:56:00,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:00,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961102869] [2020-12-22 09:56:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:00,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961102869] [2020-12-22 09:56:00,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:00,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:00,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441930066] [2020-12-22 09:56:00,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:00,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:00,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:00,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:00,820 INFO L87 Difference]: Start difference. First operand 1872 states and 2900 transitions. Second operand 3 states. [2020-12-22 09:56:00,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:00,879 INFO L93 Difference]: Finished difference Result 2484 states and 3854 transitions. [2020-12-22 09:56:00,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:00,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:56:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:00,892 INFO L225 Difference]: With dead ends: 2484 [2020-12-22 09:56:00,893 INFO L226 Difference]: Without dead ends: 2154 [2020-12-22 09:56:00,894 INFO L677 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 [2020-12-22 09:56:00,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2020-12-22 09:56:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2152. [2020-12-22 09:56:00,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2152 states. [2020-12-22 09:56:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3328 transitions. [2020-12-22 09:56:00,960 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3328 transitions. Word has length 64 [2020-12-22 09:56:00,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:00,961 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 3328 transitions. [2020-12-22 09:56:00,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3328 transitions. [2020-12-22 09:56:00,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:00,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:00,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:00,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:56:00,962 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:00,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2020-12-22 09:56:00,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:00,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832400781] [2020-12-22 09:56:00,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:01,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832400781] [2020-12-22 09:56:01,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:01,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:01,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614208358] [2020-12-22 09:56:01,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:01,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:01,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:01,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:01,026 INFO L87 Difference]: Start difference. First operand 2152 states and 3328 transitions. Second operand 3 states. [2020-12-22 09:56:01,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:01,106 INFO L93 Difference]: Finished difference Result 3276 states and 5058 transitions. [2020-12-22 09:56:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:01,107 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 09:56:01,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:01,122 INFO L225 Difference]: With dead ends: 3276 [2020-12-22 09:56:01,122 INFO L226 Difference]: Without dead ends: 2666 [2020-12-22 09:56:01,124 INFO L677 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 [2020-12-22 09:56:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2020-12-22 09:56:01,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2664. [2020-12-22 09:56:01,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2664 states. [2020-12-22 09:56:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 4096 transitions. [2020-12-22 09:56:01,221 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 4096 transitions. Word has length 64 [2020-12-22 09:56:01,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:01,221 INFO L481 AbstractCegarLoop]: Abstraction has 2664 states and 4096 transitions. [2020-12-22 09:56:01,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:01,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 4096 transitions. [2020-12-22 09:56:01,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 09:56:01,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:01,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:01,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:56:01,223 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:01,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:01,224 INFO L82 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2020-12-22 09:56:01,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:01,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474238927] [2020-12-22 09:56:01,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:01,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474238927] [2020-12-22 09:56:01,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:01,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:01,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034708749] [2020-12-22 09:56:01,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:01,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:01,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:01,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:01,392 INFO L87 Difference]: Start difference. First operand 2664 states and 4096 transitions. Second operand 7 states. [2020-12-22 09:56:02,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:02,193 INFO L93 Difference]: Finished difference Result 13884 states and 21226 transitions. [2020-12-22 09:56:02,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:56:02,194 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 09:56:02,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:02,287 INFO L225 Difference]: With dead ends: 13884 [2020-12-22 09:56:02,287 INFO L226 Difference]: Without dead ends: 12762 [2020-12-22 09:56:02,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 09:56:02,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12762 states. [2020-12-22 09:56:02,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12762 to 3784. [2020-12-22 09:56:02,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-12-22 09:56:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5744 transitions. [2020-12-22 09:56:02,624 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5744 transitions. Word has length 64 [2020-12-22 09:56:02,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:02,625 INFO L481 AbstractCegarLoop]: Abstraction has 3784 states and 5744 transitions. [2020-12-22 09:56:02,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5744 transitions. [2020-12-22 09:56:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:56:02,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:02,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:02,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:56:02,627 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:02,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:02,627 INFO L82 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2020-12-22 09:56:02,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:02,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406687421] [2020-12-22 09:56:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:02,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406687421] [2020-12-22 09:56:02,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:02,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:02,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334145291] [2020-12-22 09:56:02,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:02,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:02,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:02,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:02,707 INFO L87 Difference]: Start difference. First operand 3784 states and 5744 transitions. Second operand 3 states. [2020-12-22 09:56:02,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:02,924 INFO L93 Difference]: Finished difference Result 7070 states and 10660 transitions. [2020-12-22 09:56:02,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:02,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 09:56:02,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:02,938 INFO L225 Difference]: With dead ends: 7070 [2020-12-22 09:56:02,938 INFO L226 Difference]: Without dead ends: 4828 [2020-12-22 09:56:02,943 INFO L677 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 [2020-12-22 09:56:02,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2020-12-22 09:56:03,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2020-12-22 09:56:03,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:56:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7250 transitions. [2020-12-22 09:56:03,216 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7250 transitions. Word has length 66 [2020-12-22 09:56:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:03,216 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7250 transitions. [2020-12-22 09:56:03,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7250 transitions. [2020-12-22 09:56:03,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 09:56:03,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:03,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:03,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:56:03,224 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:03,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:03,225 INFO L82 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2020-12-22 09:56:03,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:03,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921188551] [2020-12-22 09:56:03,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:03,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:03,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921188551] [2020-12-22 09:56:03,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:03,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:03,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291668138] [2020-12-22 09:56:03,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:03,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:03,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:03,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:03,516 INFO L87 Difference]: Start difference. First operand 4826 states and 7250 transitions. Second operand 7 states. [2020-12-22 09:56:03,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:03,919 INFO L93 Difference]: Finished difference Result 8110 states and 12116 transitions. [2020-12-22 09:56:03,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:03,920 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-22 09:56:03,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:03,932 INFO L225 Difference]: With dead ends: 8110 [2020-12-22 09:56:03,933 INFO L226 Difference]: Without dead ends: 4828 [2020-12-22 09:56:03,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:56:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2020-12-22 09:56:04,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2020-12-22 09:56:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:56:04,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7202 transitions. [2020-12-22 09:56:04,185 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7202 transitions. Word has length 66 [2020-12-22 09:56:04,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:04,186 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7202 transitions. [2020-12-22 09:56:04,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:04,186 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7202 transitions. [2020-12-22 09:56:04,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:56:04,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:04,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:04,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:56:04,187 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:04,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:04,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2020-12-22 09:56:04,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:04,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736177872] [2020-12-22 09:56:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:04,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736177872] [2020-12-22 09:56:04,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:04,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:56:04,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634729053] [2020-12-22 09:56:04,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:56:04,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:04,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:56:04,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:56:04,279 INFO L87 Difference]: Start difference. First operand 4826 states and 7202 transitions. Second operand 6 states. [2020-12-22 09:56:04,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:04,648 INFO L93 Difference]: Finished difference Result 8108 states and 12019 transitions. [2020-12-22 09:56:04,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:56:04,649 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:56:04,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:04,660 INFO L225 Difference]: With dead ends: 8108 [2020-12-22 09:56:04,661 INFO L226 Difference]: Without dead ends: 4826 [2020-12-22 09:56:04,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:56:04,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2020-12-22 09:56:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2020-12-22 09:56:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:56:04,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7154 transitions. [2020-12-22 09:56:04,935 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7154 transitions. Word has length 67 [2020-12-22 09:56:04,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:04,936 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7154 transitions. [2020-12-22 09:56:04,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:56:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7154 transitions. [2020-12-22 09:56:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:56:04,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:04,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:04,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:56:04,937 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:04,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:04,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2020-12-22 09:56:04,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:04,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391570798] [2020-12-22 09:56:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:05,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391570798] [2020-12-22 09:56:05,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:05,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:56:05,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744119153] [2020-12-22 09:56:05,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:56:05,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:05,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:56:05,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:56:05,048 INFO L87 Difference]: Start difference. First operand 4826 states and 7154 transitions. Second operand 6 states. [2020-12-22 09:56:05,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:05,403 INFO L93 Difference]: Finished difference Result 8108 states and 11923 transitions. [2020-12-22 09:56:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:56:05,404 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 09:56:05,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:05,414 INFO L225 Difference]: With dead ends: 8108 [2020-12-22 09:56:05,414 INFO L226 Difference]: Without dead ends: 4826 [2020-12-22 09:56:05,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:56:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2020-12-22 09:56:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2020-12-22 09:56:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4826 states. [2020-12-22 09:56:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7106 transitions. [2020-12-22 09:56:05,693 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7106 transitions. Word has length 67 [2020-12-22 09:56:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:05,694 INFO L481 AbstractCegarLoop]: Abstraction has 4826 states and 7106 transitions. [2020-12-22 09:56:05,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:56:05,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7106 transitions. [2020-12-22 09:56:05,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 09:56:05,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:05,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:05,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:56:05,695 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:05,696 INFO L82 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2020-12-22 09:56:05,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:05,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535626561] [2020-12-22 09:56:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:05,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:05,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535626561] [2020-12-22 09:56:05,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:05,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:56:05,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779076960] [2020-12-22 09:56:05,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:56:05,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:05,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:56:05,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:56:05,856 INFO L87 Difference]: Start difference. First operand 4826 states and 7106 transitions. Second operand 5 states. [2020-12-22 09:56:06,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:06,307 INFO L93 Difference]: Finished difference Result 7669 states and 11080 transitions. [2020-12-22 09:56:06,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:06,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-22 09:56:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:06,325 INFO L225 Difference]: With dead ends: 7669 [2020-12-22 09:56:06,325 INFO L226 Difference]: Without dead ends: 7667 [2020-12-22 09:56:06,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:56:06,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7667 states. [2020-12-22 09:56:06,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7667 to 5018. [2020-12-22 09:56:06,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5018 states. [2020-12-22 09:56:06,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7282 transitions. [2020-12-22 09:56:06,648 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7282 transitions. Word has length 67 [2020-12-22 09:56:06,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:06,648 INFO L481 AbstractCegarLoop]: Abstraction has 5018 states and 7282 transitions. [2020-12-22 09:56:06,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:56:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7282 transitions. [2020-12-22 09:56:06,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 09:56:06,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:06,650 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:06,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:56:06,650 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:06,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:06,651 INFO L82 PathProgramCache]: Analyzing trace with hash 2081134109, now seen corresponding path program 1 times [2020-12-22 09:56:06,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:06,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561292259] [2020-12-22 09:56:06,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 09:56:06,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561292259] [2020-12-22 09:56:06,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:06,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 09:56:06,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207665022] [2020-12-22 09:56:06,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:56:06,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:06,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:56:06,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:06,719 INFO L87 Difference]: Start difference. First operand 5018 states and 7282 transitions. Second operand 3 states. [2020-12-22 09:56:12,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:12,961 INFO L93 Difference]: Finished difference Result 8024 states and 11969 transitions. [2020-12-22 09:56:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:56:12,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2020-12-22 09:56:12,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:12,978 INFO L225 Difference]: With dead ends: 8024 [2020-12-22 09:56:12,978 INFO L226 Difference]: Without dead ends: 6520 [2020-12-22 09:56:12,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:56:12,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2020-12-22 09:56:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 6520. [2020-12-22 09:56:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6520 states. [2020-12-22 09:56:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6520 states to 6520 states and 9060 transitions. [2020-12-22 09:56:13,297 INFO L78 Accepts]: Start accepts. Automaton has 6520 states and 9060 transitions. Word has length 78 [2020-12-22 09:56:13,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:13,298 INFO L481 AbstractCegarLoop]: Abstraction has 6520 states and 9060 transitions. [2020-12-22 09:56:13,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:56:13,298 INFO L276 IsEmpty]: Start isEmpty. Operand 6520 states and 9060 transitions. [2020-12-22 09:56:13,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 09:56:13,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:13,300 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:13,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:56:13,300 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:13,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:13,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2009363566, now seen corresponding path program 1 times [2020-12-22 09:56:13,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:13,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144243164] [2020-12-22 09:56:13,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:13,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144243164] [2020-12-22 09:56:13,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:13,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:56:13,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838931686] [2020-12-22 09:56:13,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:56:13,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:13,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:56:13,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:56:13,427 INFO L87 Difference]: Start difference. First operand 6520 states and 9060 transitions. Second operand 4 states. [2020-12-22 09:56:23,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:23,590 INFO L93 Difference]: Finished difference Result 13281 states and 18102 transitions. [2020-12-22 09:56:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:56:23,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-12-22 09:56:23,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:23,613 INFO L225 Difference]: With dead ends: 13281 [2020-12-22 09:56:23,613 INFO L226 Difference]: Without dead ends: 10275 [2020-12-22 09:56:23,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:56:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10275 states. [2020-12-22 09:56:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10275 to 10275. [2020-12-22 09:56:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10275 states. [2020-12-22 09:56:23,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10275 states to 10275 states and 13607 transitions. [2020-12-22 09:56:23,967 INFO L78 Accepts]: Start accepts. Automaton has 10275 states and 13607 transitions. Word has length 84 [2020-12-22 09:56:23,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:23,967 INFO L481 AbstractCegarLoop]: Abstraction has 10275 states and 13607 transitions. [2020-12-22 09:56:23,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:56:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 10275 states and 13607 transitions. [2020-12-22 09:56:23,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:23,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:23,972 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:23,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:56:23,972 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:23,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2020-12-22 09:56:23,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:23,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633036993] [2020-12-22 09:56:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 09:56:24,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633036993] [2020-12-22 09:56:24,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:24,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:24,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302372487] [2020-12-22 09:56:24,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:24,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:24,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:24,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:24,086 INFO L87 Difference]: Start difference. First operand 10275 states and 13607 transitions. Second operand 7 states. [2020-12-22 09:56:25,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:25,185 INFO L93 Difference]: Finished difference Result 28351 states and 39037 transitions. [2020-12-22 09:56:25,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:25,186 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:25,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:25,237 INFO L225 Difference]: With dead ends: 28351 [2020-12-22 09:56:25,237 INFO L226 Difference]: Without dead ends: 24877 [2020-12-22 09:56:25,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:25,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24877 states. [2020-12-22 09:56:25,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24877 to 13747. [2020-12-22 09:56:25,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13747 states. [2020-12-22 09:56:25,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13747 states to 13747 states and 18455 transitions. [2020-12-22 09:56:25,939 INFO L78 Accepts]: Start accepts. Automaton has 13747 states and 18455 transitions. Word has length 95 [2020-12-22 09:56:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:25,939 INFO L481 AbstractCegarLoop]: Abstraction has 13747 states and 18455 transitions. [2020-12-22 09:56:25,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 13747 states and 18455 transitions. [2020-12-22 09:56:25,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:25,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:25,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:25,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:56:25,945 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:25,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2020-12-22 09:56:25,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:25,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865618853] [2020-12-22 09:56:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 09:56:26,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865618853] [2020-12-22 09:56:26,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:26,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:26,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801687255] [2020-12-22 09:56:26,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:26,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:26,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:26,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:26,081 INFO L87 Difference]: Start difference. First operand 13747 states and 18455 transitions. Second operand 7 states. [2020-12-22 09:56:27,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:27,325 INFO L93 Difference]: Finished difference Result 31823 states and 43885 transitions. [2020-12-22 09:56:27,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:27,326 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:27,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:27,377 INFO L225 Difference]: With dead ends: 31823 [2020-12-22 09:56:27,377 INFO L226 Difference]: Without dead ends: 28349 [2020-12-22 09:56:27,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:27,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28349 states. [2020-12-22 09:56:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28349 to 18963. [2020-12-22 09:56:28,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18963 states. [2020-12-22 09:56:28,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18963 states to 18963 states and 25687 transitions. [2020-12-22 09:56:28,480 INFO L78 Accepts]: Start accepts. Automaton has 18963 states and 25687 transitions. Word has length 95 [2020-12-22 09:56:28,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:28,481 INFO L481 AbstractCegarLoop]: Abstraction has 18963 states and 25687 transitions. [2020-12-22 09:56:28,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:28,481 INFO L276 IsEmpty]: Start isEmpty. Operand 18963 states and 25687 transitions. [2020-12-22 09:56:28,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:28,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:28,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:28,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:56:28,488 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:28,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:28,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2020-12-22 09:56:28,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:28,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907664905] [2020-12-22 09:56:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 09:56:28,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907664905] [2020-12-22 09:56:28,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:28,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:28,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150726819] [2020-12-22 09:56:28,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:28,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:28,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:28,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:28,608 INFO L87 Difference]: Start difference. First operand 18963 states and 25687 transitions. Second operand 7 states. [2020-12-22 09:56:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:30,091 INFO L93 Difference]: Finished difference Result 35295 states and 48733 transitions. [2020-12-22 09:56:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:30,092 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:30,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:30,134 INFO L225 Difference]: With dead ends: 35295 [2020-12-22 09:56:30,134 INFO L226 Difference]: Without dead ends: 31821 [2020-12-22 09:56:30,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:30,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31821 states. [2020-12-22 09:56:31,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31821 to 22435. [2020-12-22 09:56:31,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22435 states. [2020-12-22 09:56:31,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22435 states to 22435 states and 30535 transitions. [2020-12-22 09:56:31,598 INFO L78 Accepts]: Start accepts. Automaton has 22435 states and 30535 transitions. Word has length 95 [2020-12-22 09:56:31,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:31,598 INFO L481 AbstractCegarLoop]: Abstraction has 22435 states and 30535 transitions. [2020-12-22 09:56:31,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:31,603 INFO L276 IsEmpty]: Start isEmpty. Operand 22435 states and 30535 transitions. [2020-12-22 09:56:31,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:31,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:31,610 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:31,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:56:31,610 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:31,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:31,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2020-12-22 09:56:31,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:31,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140991492] [2020-12-22 09:56:31,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:31,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:56:31,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140991492] [2020-12-22 09:56:31,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:31,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:31,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346706226] [2020-12-22 09:56:31,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:31,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:31,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:31,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:31,720 INFO L87 Difference]: Start difference. First operand 22435 states and 30535 transitions. Second operand 7 states. [2020-12-22 09:56:33,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:33,661 INFO L93 Difference]: Finished difference Result 38767 states and 53581 transitions. [2020-12-22 09:56:33,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:33,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:33,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:33,701 INFO L225 Difference]: With dead ends: 38767 [2020-12-22 09:56:33,701 INFO L226 Difference]: Without dead ends: 35293 [2020-12-22 09:56:33,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35293 states. [2020-12-22 09:56:35,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35293 to 25907. [2020-12-22 09:56:35,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25907 states. [2020-12-22 09:56:35,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25907 states to 25907 states and 35383 transitions. [2020-12-22 09:56:35,264 INFO L78 Accepts]: Start accepts. Automaton has 25907 states and 35383 transitions. Word has length 95 [2020-12-22 09:56:35,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:35,264 INFO L481 AbstractCegarLoop]: Abstraction has 25907 states and 35383 transitions. [2020-12-22 09:56:35,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand 25907 states and 35383 transitions. [2020-12-22 09:56:35,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 09:56:35,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:35,272 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:35,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:56:35,272 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:35,273 INFO L82 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2020-12-22 09:56:35,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:35,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665737480] [2020-12-22 09:56:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:35,384 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:56:35,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665737480] [2020-12-22 09:56:35,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:56:35,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 09:56:35,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734096307] [2020-12-22 09:56:35,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:56:35,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:35,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:56:35,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:56:35,390 INFO L87 Difference]: Start difference. First operand 25907 states and 35383 transitions. Second operand 7 states. [2020-12-22 09:56:38,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:38,139 INFO L93 Difference]: Finished difference Result 40159 states and 55549 transitions. [2020-12-22 09:56:38,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:56:38,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 09:56:38,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:38,183 INFO L225 Difference]: With dead ends: 40159 [2020-12-22 09:56:38,183 INFO L226 Difference]: Without dead ends: 37725 [2020-12-22 09:56:38,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:56:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37725 states. [2020-12-22 09:56:39,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37725 to 28339. [2020-12-22 09:56:39,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28339 states. [2020-12-22 09:56:39,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28339 states to 28339 states and 38807 transitions. [2020-12-22 09:56:39,859 INFO L78 Accepts]: Start accepts. Automaton has 28339 states and 38807 transitions. Word has length 95 [2020-12-22 09:56:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:56:39,859 INFO L481 AbstractCegarLoop]: Abstraction has 28339 states and 38807 transitions. [2020-12-22 09:56:39,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:56:39,860 INFO L276 IsEmpty]: Start isEmpty. Operand 28339 states and 38807 transitions. [2020-12-22 09:56:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 09:56:39,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:56:39,867 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:56:39,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:56:39,868 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:56:39,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:56:39,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2020-12-22 09:56:39,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:56:39,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566112608] [2020-12-22 09:56:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:56:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:56:40,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566112608] [2020-12-22 09:56:40,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573171607] [2020-12-22 09:56:40,229 INFO L95 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 [2020-12-22 09:56:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:56:40,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 09:56:40,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:56:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 09:56:40,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:56:40,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2020-12-22 09:56:40,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826225782] [2020-12-22 09:56:40,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 09:56:40,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:56:40,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 09:56:40,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2020-12-22 09:56:40,784 INFO L87 Difference]: Start difference. First operand 28339 states and 38807 transitions. Second operand 21 states. [2020-12-22 09:56:56,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:56:56,683 INFO L93 Difference]: Finished difference Result 145140 states and 200288 transitions. [2020-12-22 09:56:56,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 09:56:56,684 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 09:56:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:56:57,115 INFO L225 Difference]: With dead ends: 145140 [2020-12-22 09:56:57,116 INFO L226 Difference]: Without dead ends: 123602 [2020-12-22 09:56:57,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4681 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2354, Invalid=10078, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 09:56:57,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123602 states. [2020-12-22 09:57:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123602 to 79019. [2020-12-22 09:57:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79019 states. [2020-12-22 09:57:04,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79019 states to 79019 states and 108215 transitions. [2020-12-22 09:57:04,332 INFO L78 Accepts]: Start accepts. Automaton has 79019 states and 108215 transitions. Word has length 96 [2020-12-22 09:57:04,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:57:04,332 INFO L481 AbstractCegarLoop]: Abstraction has 79019 states and 108215 transitions. [2020-12-22 09:57:04,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 09:57:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 79019 states and 108215 transitions. [2020-12-22 09:57:04,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:57:04,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:57:04,341 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:57:04,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 09:57:04,556 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:57:04,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:57:04,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1879245087, now seen corresponding path program 1 times [2020-12-22 09:57:04,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:57:04,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243087303] [2020-12-22 09:57:04,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:57:04,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:04,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243087303] [2020-12-22 09:57:04,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627631502] [2020-12-22 09:57:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 09:57:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:57:04,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 09:57:04,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:57:05,189 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 09:57:05,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:57:05,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:57:05,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 09:57:05,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638776333] [2020-12-22 09:57:05,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 09:57:05,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:57:05,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 09:57:05,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:57:05,565 INFO L87 Difference]: Start difference. First operand 79019 states and 108215 transitions. Second operand 17 states. [2020-12-22 09:57:06,409 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:57:09,631 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:57:09,784 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:57:09,994 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:57:10,242 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:57:10,486 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:57:11,293 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:57:11,669 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:57:11,966 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:57:12,298 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-22 09:57:13,070 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-12-22 09:57:13,422 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:57:14,585 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 09:57:14,762 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 09:58:39,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:58:39,567 INFO L93 Difference]: Finished difference Result 955225 states and 1300290 transitions. [2020-12-22 09:58:39,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-12-22 09:58:39,568 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-22 09:58:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:58:41,491 INFO L225 Difference]: With dead ends: 955225 [2020-12-22 09:58:41,492 INFO L226 Difference]: Without dead ends: 883007 [2020-12-22 09:58:41,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6261 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=2263, Invalid=14249, Unknown=0, NotChecked=0, Total=16512 [2020-12-22 09:58:42,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883007 states. [2020-12-22 09:59:20,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883007 to 341775. [2020-12-22 09:59:20,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341775 states. [2020-12-22 09:59:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341775 states to 341775 states and 465279 transitions. [2020-12-22 09:59:21,743 INFO L78 Accepts]: Start accepts. Automaton has 341775 states and 465279 transitions. Word has length 97 [2020-12-22 09:59:21,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:59:21,743 INFO L481 AbstractCegarLoop]: Abstraction has 341775 states and 465279 transitions. [2020-12-22 09:59:21,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 09:59:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 341775 states and 465279 transitions. [2020-12-22 09:59:21,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 09:59:21,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:59:21,761 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:59:21,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:59:21,976 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:59:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:59:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash -135405655, now seen corresponding path program 1 times [2020-12-22 09:59:21,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:59:21,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752430171] [2020-12-22 09:59:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:59:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:59:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:59:22,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752430171] [2020-12-22 09:59:22,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:59:22,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:59:22,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017240004] [2020-12-22 09:59:22,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:59:22,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:59:22,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:59:22,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:59:22,072 INFO L87 Difference]: Start difference. First operand 341775 states and 465279 transitions. Second operand 3 states.