/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/eca-rers2012/Problem04_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 23:45:40,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 23:45:40,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 23:45:40,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 23:45:40,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 23:45:40,108 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 23:45:40,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 23:45:40,113 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 23:45:40,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 23:45:40,116 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 23:45:40,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 23:45:40,119 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 23:45:40,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 23:45:40,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 23:45:40,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 23:45:40,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 23:45:40,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 23:45:40,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 23:45:40,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 23:45:40,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 23:45:40,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 23:45:40,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 23:45:40,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 23:45:40,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 23:45:40,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 23:45:40,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 23:45:40,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 23:45:40,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 23:45:40,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 23:45:40,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 23:45:40,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 23:45:40,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 23:45:40,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 23:45:40,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 23:45:40,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 23:45:40,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 23:45:40,169 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 23:45:40,195 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 23:45:40,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 23:45:40,197 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 23:45:40,197 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 23:45:40,197 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 23:45:40,197 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 23:45:40,198 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 23:45:40,198 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 23:45:40,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 23:45:40,199 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 23:45:40,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 23:45:40,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 23:45:40,199 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 23:45:40,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 23:45:40,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 23:45:40,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 23:45:40,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 23:45:40,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 23:45:40,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 23:45:40,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 23:45:40,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 23:45:40,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 23:45:40,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 23:45:40,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 23:45:40,202 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 23:45:40,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 23:45:40,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 23:45:40,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 23:45:40,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 23:45:40,591 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 23:45:40,592 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 23:45:40,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem04_label31.c [2020-12-21 23:45:40,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fd463a36/3105a5dd98314842b9a3b36ba35c454c/FLAG0ae49e574 [2020-12-21 23:45:41,725 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 23:45:41,725 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem04_label31.c [2020-12-21 23:45:41,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fd463a36/3105a5dd98314842b9a3b36ba35c454c/FLAG0ae49e574 [2020-12-21 23:45:42,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2fd463a36/3105a5dd98314842b9a3b36ba35c454c [2020-12-21 23:45:42,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 23:45:42,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 23:45:42,136 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 23:45:42,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 23:45:42,141 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 23:45:42,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:45:42" (1/1) ... [2020-12-21 23:45:42,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d17dd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:45:42, skipping insertion in model container [2020-12-21 23:45:42,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:45:42" (1/1) ... [2020-12-21 23:45:42,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 23:45:42,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 23:45:44,246 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/eca-rers2012/Problem04_label31.c[176641,176654] [2020-12-21 23:45:44,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:45:44,301 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 23:45:45,023 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/eca-rers2012/Problem04_label31.c[176641,176654] [2020-12-21 23:45:45,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 23:45:45,078 INFO L208 MainTranslator]: Completed translation [2020-12-21 23:45:45,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:45:45 WrapperNode [2020-12-21 23:45:45,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 23:45:45,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 23:45:45,082 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 23:45:45,082 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 23:45:45,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:45:45" (1/1) ... [2020-12-21 23:45:45,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:45:45" (1/1) ... [2020-12-21 23:45:45,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 23:45:45,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 23:45:45,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 23:45:45,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 23:45:45,412 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:45:45" (1/1) ... [2020-12-21 23:45:45,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:45:45" (1/1) ... [2020-12-21 23:45:45,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:45:45" (1/1) ... [2020-12-21 23:45:45,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:45:45" (1/1) ... [2020-12-21 23:45:45,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:45:45" (1/1) ... [2020-12-21 23:45:45,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:45:45" (1/1) ... [2020-12-21 23:45:45,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:45:45" (1/1) ... [2020-12-21 23:45:45,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 23:45:45,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 23:45:45,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 23:45:45,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 23:45:45,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:45:45" (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 [2020-12-21 23:45:45,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 23:45:45,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 23:45:45,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 23:45:45,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 23:45:51,091 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 23:45:51,092 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-21 23:45:51,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:45:51 BoogieIcfgContainer [2020-12-21 23:45:51,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 23:45:51,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 23:45:51,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 23:45:51,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 23:45:51,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:45:42" (1/3) ... [2020-12-21 23:45:51,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6523fe96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:45:51, skipping insertion in model container [2020-12-21 23:45:51,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:45:45" (2/3) ... [2020-12-21 23:45:51,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6523fe96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:45:51, skipping insertion in model container [2020-12-21 23:45:51,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:45:51" (3/3) ... [2020-12-21 23:45:51,112 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem04_label31.c [2020-12-21 23:45:51,120 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 23:45:51,127 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 23:45:51,150 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 23:45:51,207 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 23:45:51,207 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 23:45:51,207 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 23:45:51,207 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 23:45:51,207 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 23:45:51,208 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 23:45:51,208 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 23:45:51,208 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 23:45:51,251 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states. [2020-12-21 23:45:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2020-12-21 23:45:51,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:45:51,309 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:45:51,310 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:45:51,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:45:51,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2024941413, now seen corresponding path program 1 times [2020-12-21 23:45:51,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:45:51,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235380345] [2020-12-21 23:45:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:45:51,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:45:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:45:53,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235380345] [2020-12-21 23:45:53,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:45:53,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:45:53,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868299879] [2020-12-21 23:45:53,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:45:53,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:45:53,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:45:53,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:45:53,888 INFO L87 Difference]: Start difference. First operand 885 states. Second operand 3 states. [2020-12-21 23:45:59,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:45:59,386 INFO L93 Difference]: Finished difference Result 2589 states and 5028 transitions. [2020-12-21 23:45:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:45:59,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 758 [2020-12-21 23:45:59,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:45:59,454 INFO L225 Difference]: With dead ends: 2589 [2020-12-21 23:45:59,455 INFO L226 Difference]: Without dead ends: 1640 [2020-12-21 23:45:59,467 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 [2020-12-21 23:45:59,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2020-12-21 23:45:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1640. [2020-12-21 23:45:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2020-12-21 23:45:59,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2684 transitions. [2020-12-21 23:45:59,651 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2684 transitions. Word has length 758 [2020-12-21 23:45:59,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:45:59,654 INFO L481 AbstractCegarLoop]: Abstraction has 1640 states and 2684 transitions. [2020-12-21 23:45:59,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:45:59,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2684 transitions. [2020-12-21 23:45:59,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 770 [2020-12-21 23:45:59,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:45:59,680 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:45:59,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 23:45:59,681 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:45:59,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:45:59,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1019138320, now seen corresponding path program 1 times [2020-12-21 23:45:59,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:45:59,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720040474] [2020-12-21 23:45:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:45:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:46:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:46:00,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720040474] [2020-12-21 23:46:00,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:46:00,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:46:00,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764674084] [2020-12-21 23:46:00,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:46:00,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:46:00,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:46:00,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:46:00,439 INFO L87 Difference]: Start difference. First operand 1640 states and 2684 transitions. Second operand 3 states. [2020-12-21 23:46:05,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:46:05,669 INFO L93 Difference]: Finished difference Result 4914 states and 8047 transitions. [2020-12-21 23:46:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:46:05,676 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 769 [2020-12-21 23:46:05,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:46:05,698 INFO L225 Difference]: With dead ends: 4914 [2020-12-21 23:46:05,698 INFO L226 Difference]: Without dead ends: 3276 [2020-12-21 23:46:05,703 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 [2020-12-21 23:46:05,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2020-12-21 23:46:05,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 3276. [2020-12-21 23:46:05,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3276 states. [2020-12-21 23:46:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3276 states to 3276 states and 4729 transitions. [2020-12-21 23:46:05,786 INFO L78 Accepts]: Start accepts. Automaton has 3276 states and 4729 transitions. Word has length 769 [2020-12-21 23:46:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:46:05,786 INFO L481 AbstractCegarLoop]: Abstraction has 3276 states and 4729 transitions. [2020-12-21 23:46:05,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:46:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3276 states and 4729 transitions. [2020-12-21 23:46:05,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 816 [2020-12-21 23:46:05,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:46:05,801 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:46:05,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 23:46:05,802 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:46:05,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:46:05,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1485028193, now seen corresponding path program 1 times [2020-12-21 23:46:05,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:46:05,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628993141] [2020-12-21 23:46:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:46:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:46:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 23:46:06,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628993141] [2020-12-21 23:46:06,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:46:06,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:46:06,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203794002] [2020-12-21 23:46:06,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:46:06,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:46:06,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:46:06,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:46:06,369 INFO L87 Difference]: Start difference. First operand 3276 states and 4729 transitions. Second operand 3 states. [2020-12-21 23:46:11,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:46:11,754 INFO L93 Difference]: Finished difference Result 9822 states and 14182 transitions. [2020-12-21 23:46:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:46:11,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 815 [2020-12-21 23:46:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:46:11,790 INFO L225 Difference]: With dead ends: 9822 [2020-12-21 23:46:11,791 INFO L226 Difference]: Without dead ends: 6548 [2020-12-21 23:46:11,797 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 [2020-12-21 23:46:11,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6548 states. [2020-12-21 23:46:11,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6548 to 6548. [2020-12-21 23:46:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6548 states. [2020-12-21 23:46:11,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6548 states to 6548 states and 8819 transitions. [2020-12-21 23:46:11,965 INFO L78 Accepts]: Start accepts. Automaton has 6548 states and 8819 transitions. Word has length 815 [2020-12-21 23:46:11,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:46:11,973 INFO L481 AbstractCegarLoop]: Abstraction has 6548 states and 8819 transitions. [2020-12-21 23:46:11,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:46:11,974 INFO L276 IsEmpty]: Start isEmpty. Operand 6548 states and 8819 transitions. [2020-12-21 23:46:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2020-12-21 23:46:11,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:46:11,993 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:46:11,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-21 23:46:11,993 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:46:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:46:11,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1046265089, now seen corresponding path program 1 times [2020-12-21 23:46:11,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:46:11,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475979292] [2020-12-21 23:46:11,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:46:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:46:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:46:12,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475979292] [2020-12-21 23:46:12,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:46:12,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:46:12,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325098947] [2020-12-21 23:46:12,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:46:12,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:46:12,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:46:12,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:46:12,783 INFO L87 Difference]: Start difference. First operand 6548 states and 8819 transitions. Second operand 4 states. [2020-12-21 23:46:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:46:17,984 INFO L93 Difference]: Finished difference Result 13941 states and 18537 transitions. [2020-12-21 23:46:17,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 23:46:17,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 827 [2020-12-21 23:46:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:46:18,020 INFO L225 Difference]: With dead ends: 13941 [2020-12-21 23:46:18,021 INFO L226 Difference]: Without dead ends: 7395 [2020-12-21 23:46:18,031 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 [2020-12-21 23:46:18,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7395 states. [2020-12-21 23:46:18,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7395 to 7366. [2020-12-21 23:46:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7366 states. [2020-12-21 23:46:18,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7366 states to 7366 states and 9643 transitions. [2020-12-21 23:46:18,212 INFO L78 Accepts]: Start accepts. Automaton has 7366 states and 9643 transitions. Word has length 827 [2020-12-21 23:46:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:46:18,213 INFO L481 AbstractCegarLoop]: Abstraction has 7366 states and 9643 transitions. [2020-12-21 23:46:18,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:46:18,213 INFO L276 IsEmpty]: Start isEmpty. Operand 7366 states and 9643 transitions. [2020-12-21 23:46:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 843 [2020-12-21 23:46:18,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:46:18,237 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:46:18,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-21 23:46:18,237 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:46:18,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:46:18,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1970351874, now seen corresponding path program 1 times [2020-12-21 23:46:18,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:46:18,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883037611] [2020-12-21 23:46:18,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:46:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:46:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 23:46:18,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883037611] [2020-12-21 23:46:18,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:46:18,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:46:18,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078649378] [2020-12-21 23:46:18,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:46:18,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:46:18,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:46:18,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:46:18,911 INFO L87 Difference]: Start difference. First operand 7366 states and 9643 transitions. Second operand 3 states. [2020-12-21 23:46:25,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:46:25,030 INFO L93 Difference]: Finished difference Result 20456 states and 27276 transitions. [2020-12-21 23:46:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:46:25,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 842 [2020-12-21 23:46:25,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:46:25,087 INFO L225 Difference]: With dead ends: 20456 [2020-12-21 23:46:25,087 INFO L226 Difference]: Without dead ends: 13910 [2020-12-21 23:46:25,099 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 [2020-12-21 23:46:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13910 states. [2020-12-21 23:46:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13910 to 13910. [2020-12-21 23:46:25,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13910 states. [2020-12-21 23:46:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13910 states to 13910 states and 17717 transitions. [2020-12-21 23:46:25,395 INFO L78 Accepts]: Start accepts. Automaton has 13910 states and 17717 transitions. Word has length 842 [2020-12-21 23:46:25,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:46:25,396 INFO L481 AbstractCegarLoop]: Abstraction has 13910 states and 17717 transitions. [2020-12-21 23:46:25,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:46:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 13910 states and 17717 transitions. [2020-12-21 23:46:25,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2020-12-21 23:46:25,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:46:25,434 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:46:25,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-21 23:46:25,435 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:46:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:46:25,435 INFO L82 PathProgramCache]: Analyzing trace with hash -669421989, now seen corresponding path program 1 times [2020-12-21 23:46:25,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:46:25,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925278263] [2020-12-21 23:46:25,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:46:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:46:26,159 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 23:46:26,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925278263] [2020-12-21 23:46:26,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:46:26,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:46:26,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092658379] [2020-12-21 23:46:26,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:46:26,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:46:26,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:46:26,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:46:26,163 INFO L87 Difference]: Start difference. First operand 13910 states and 17717 transitions. Second operand 3 states. [2020-12-21 23:46:31,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:46:31,971 INFO L93 Difference]: Finished difference Result 40088 states and 51498 transitions. [2020-12-21 23:46:31,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:46:31,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 843 [2020-12-21 23:46:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:46:32,042 INFO L225 Difference]: With dead ends: 40088 [2020-12-21 23:46:32,042 INFO L226 Difference]: Without dead ends: 26998 [2020-12-21 23:46:32,066 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 [2020-12-21 23:46:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26998 states. [2020-12-21 23:46:32,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26998 to 26998. [2020-12-21 23:46:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26998 states. [2020-12-21 23:46:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26998 states to 26998 states and 33695 transitions. [2020-12-21 23:46:32,542 INFO L78 Accepts]: Start accepts. Automaton has 26998 states and 33695 transitions. Word has length 843 [2020-12-21 23:46:32,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:46:32,543 INFO L481 AbstractCegarLoop]: Abstraction has 26998 states and 33695 transitions. [2020-12-21 23:46:32,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:46:32,543 INFO L276 IsEmpty]: Start isEmpty. Operand 26998 states and 33695 transitions. [2020-12-21 23:46:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 851 [2020-12-21 23:46:32,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:46:32,584 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:46:32,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-21 23:46:32,585 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:46:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:46:32,591 INFO L82 PathProgramCache]: Analyzing trace with hash 708804935, now seen corresponding path program 1 times [2020-12-21 23:46:32,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:46:32,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109860178] [2020-12-21 23:46:32,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:46:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:46:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-21 23:46:33,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109860178] [2020-12-21 23:46:33,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:46:33,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 23:46:33,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819093362] [2020-12-21 23:46:33,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:46:33,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:46:33,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:46:33,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:46:33,425 INFO L87 Difference]: Start difference. First operand 26998 states and 33695 transitions. Second operand 3 states. [2020-12-21 23:46:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:46:39,536 INFO L93 Difference]: Finished difference Result 77716 states and 97166 transitions. [2020-12-21 23:46:39,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:46:39,537 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 850 [2020-12-21 23:46:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:46:39,639 INFO L225 Difference]: With dead ends: 77716 [2020-12-21 23:46:39,639 INFO L226 Difference]: Without dead ends: 51538 [2020-12-21 23:46:39,678 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 [2020-12-21 23:46:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51538 states. [2020-12-21 23:46:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51538 to 46630. [2020-12-21 23:46:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46630 states. [2020-12-21 23:46:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46630 states to 46630 states and 57533 transitions. [2020-12-21 23:46:40,647 INFO L78 Accepts]: Start accepts. Automaton has 46630 states and 57533 transitions. Word has length 850 [2020-12-21 23:46:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:46:40,648 INFO L481 AbstractCegarLoop]: Abstraction has 46630 states and 57533 transitions. [2020-12-21 23:46:40,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:46:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 46630 states and 57533 transitions. [2020-12-21 23:46:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1070 [2020-12-21 23:46:40,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:46:40,707 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:46:40,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-21 23:46:40,708 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:46:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:46:40,709 INFO L82 PathProgramCache]: Analyzing trace with hash -367221045, now seen corresponding path program 1 times [2020-12-21 23:46:40,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:46:40,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960515468] [2020-12-21 23:46:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:46:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:46:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 23:46:43,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960515468] [2020-12-21 23:46:43,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:46:43,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 23:46:43,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086696718] [2020-12-21 23:46:43,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 23:46:43,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:46:43,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 23:46:43,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-21 23:46:43,431 INFO L87 Difference]: Start difference. First operand 46630 states and 57533 transitions. Second operand 6 states. [2020-12-21 23:46:54,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:46:54,229 INFO L93 Difference]: Finished difference Result 105759 states and 130234 transitions. [2020-12-21 23:46:54,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 23:46:54,230 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1069 [2020-12-21 23:46:54,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:46:54,325 INFO L225 Difference]: With dead ends: 105759 [2020-12-21 23:46:54,325 INFO L226 Difference]: Without dead ends: 59949 [2020-12-21 23:46:54,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-21 23:46:54,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59949 states. [2020-12-21 23:46:55,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59949 to 49084. [2020-12-21 23:46:55,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49084 states. [2020-12-21 23:46:55,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49084 states to 49084 states and 60041 transitions. [2020-12-21 23:46:55,055 INFO L78 Accepts]: Start accepts. Automaton has 49084 states and 60041 transitions. Word has length 1069 [2020-12-21 23:46:55,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:46:55,056 INFO L481 AbstractCegarLoop]: Abstraction has 49084 states and 60041 transitions. [2020-12-21 23:46:55,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 23:46:55,056 INFO L276 IsEmpty]: Start isEmpty. Operand 49084 states and 60041 transitions. [2020-12-21 23:46:55,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1077 [2020-12-21 23:46:55,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:46:55,099 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:46:55,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-21 23:46:55,099 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:46:55,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:46:55,100 INFO L82 PathProgramCache]: Analyzing trace with hash -605102409, now seen corresponding path program 1 times [2020-12-21 23:46:55,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:46:55,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883037958] [2020-12-21 23:46:55,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:46:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:46:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 63 proven. 295 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 23:46:57,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883037958] [2020-12-21 23:46:57,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141116141] [2020-12-21 23:46:57,680 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 [2020-12-21 23:46:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:46:58,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 23:46:58,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:47:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2020-12-21 23:47:00,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:47:00,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2020-12-21 23:47:00,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882839006] [2020-12-21 23:47:00,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:47:00,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:47:00,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:47:00,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:47:00,241 INFO L87 Difference]: Start difference. First operand 49084 states and 60041 transitions. Second operand 3 states. [2020-12-21 23:47:05,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:47:05,845 INFO L93 Difference]: Finished difference Result 114526 states and 139942 transitions. [2020-12-21 23:47:05,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:47:05,846 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1076 [2020-12-21 23:47:05,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:47:05,948 INFO L225 Difference]: With dead ends: 114526 [2020-12-21 23:47:05,948 INFO L226 Difference]: Without dead ends: 66262 [2020-12-21 23:47:05,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1079 GetRequests, 1076 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 23:47:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66262 states. [2020-12-21 23:47:06,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66262 to 61354. [2020-12-21 23:47:06,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61354 states. [2020-12-21 23:47:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61354 states to 61354 states and 73501 transitions. [2020-12-21 23:47:06,852 INFO L78 Accepts]: Start accepts. Automaton has 61354 states and 73501 transitions. Word has length 1076 [2020-12-21 23:47:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:47:06,853 INFO L481 AbstractCegarLoop]: Abstraction has 61354 states and 73501 transitions. [2020-12-21 23:47:06,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:47:06,853 INFO L276 IsEmpty]: Start isEmpty. Operand 61354 states and 73501 transitions. [2020-12-21 23:47:06,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1154 [2020-12-21 23:47:06,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:47:06,915 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:47:07,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 23:47:07,128 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:47:07,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:47:07,130 INFO L82 PathProgramCache]: Analyzing trace with hash 436076047, now seen corresponding path program 1 times [2020-12-21 23:47:07,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:47:07,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787351246] [2020-12-21 23:47:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:47:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:47:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 603 proven. 0 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2020-12-21 23:47:08,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787351246] [2020-12-21 23:47:08,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:47:08,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:47:08,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487888361] [2020-12-21 23:47:08,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:47:08,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:47:08,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:47:08,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:47:08,858 INFO L87 Difference]: Start difference. First operand 61354 states and 73501 transitions. Second operand 3 states. [2020-12-21 23:47:14,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:47:14,512 INFO L93 Difference]: Finished difference Result 122706 states and 147024 transitions. [2020-12-21 23:47:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:47:14,513 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1153 [2020-12-21 23:47:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:47:14,623 INFO L225 Difference]: With dead ends: 122706 [2020-12-21 23:47:14,623 INFO L226 Difference]: Without dead ends: 62172 [2020-12-21 23:47:14,684 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 [2020-12-21 23:47:14,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62172 states. [2020-12-21 23:47:15,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62172 to 62172. [2020-12-21 23:47:15,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62172 states. [2020-12-21 23:47:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62172 states to 62172 states and 74217 transitions. [2020-12-21 23:47:15,609 INFO L78 Accepts]: Start accepts. Automaton has 62172 states and 74217 transitions. Word has length 1153 [2020-12-21 23:47:15,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:47:15,610 INFO L481 AbstractCegarLoop]: Abstraction has 62172 states and 74217 transitions. [2020-12-21 23:47:15,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:47:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 62172 states and 74217 transitions. [2020-12-21 23:47:15,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1195 [2020-12-21 23:47:15,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:47:15,676 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:47:15,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-21 23:47:15,677 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:47:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:47:15,678 INFO L82 PathProgramCache]: Analyzing trace with hash 85929082, now seen corresponding path program 1 times [2020-12-21 23:47:15,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:47:15,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566000018] [2020-12-21 23:47:15,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:47:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:47:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 658 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-12-21 23:47:17,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566000018] [2020-12-21 23:47:17,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:47:17,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:47:17,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845037194] [2020-12-21 23:47:17,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:47:17,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:47:17,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:47:17,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:47:17,545 INFO L87 Difference]: Start difference. First operand 62172 states and 74217 transitions. Second operand 3 states. [2020-12-21 23:47:24,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:47:24,241 INFO L93 Difference]: Finished difference Result 143156 states and 171098 transitions. [2020-12-21 23:47:24,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:47:24,241 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1194 [2020-12-21 23:47:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:47:24,325 INFO L225 Difference]: With dead ends: 143156 [2020-12-21 23:47:24,325 INFO L226 Difference]: Without dead ends: 80986 [2020-12-21 23:47:24,347 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 [2020-12-21 23:47:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80986 states. [2020-12-21 23:47:25,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80986 to 79350. [2020-12-21 23:47:25,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79350 states. [2020-12-21 23:47:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79350 states to 79350 states and 93079 transitions. [2020-12-21 23:47:25,440 INFO L78 Accepts]: Start accepts. Automaton has 79350 states and 93079 transitions. Word has length 1194 [2020-12-21 23:47:25,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:47:25,441 INFO L481 AbstractCegarLoop]: Abstraction has 79350 states and 93079 transitions. [2020-12-21 23:47:25,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:47:25,441 INFO L276 IsEmpty]: Start isEmpty. Operand 79350 states and 93079 transitions. [2020-12-21 23:47:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1307 [2020-12-21 23:47:25,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:47:25,492 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:47:25,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-21 23:47:25,492 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:47:25,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:47:25,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1064418800, now seen corresponding path program 1 times [2020-12-21 23:47:25,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:47:25,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629862341] [2020-12-21 23:47:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:47:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:47:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 716 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2020-12-21 23:47:27,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629862341] [2020-12-21 23:47:27,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:47:27,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:47:27,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721181539] [2020-12-21 23:47:27,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:47:27,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:47:27,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:47:27,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:47:27,096 INFO L87 Difference]: Start difference. First operand 79350 states and 93079 transitions. Second operand 3 states. [2020-12-21 23:47:34,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:47:34,550 INFO L93 Difference]: Finished difference Result 174240 states and 205203 transitions. [2020-12-21 23:47:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:47:34,551 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1306 [2020-12-21 23:47:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:47:34,744 INFO L225 Difference]: With dead ends: 174240 [2020-12-21 23:47:34,745 INFO L226 Difference]: Without dead ends: 95710 [2020-12-21 23:47:34,820 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 [2020-12-21 23:47:34,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95710 states. [2020-12-21 23:47:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95710 to 89984. [2020-12-21 23:47:36,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89984 states. [2020-12-21 23:47:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89984 states to 89984 states and 103195 transitions. [2020-12-21 23:47:36,663 INFO L78 Accepts]: Start accepts. Automaton has 89984 states and 103195 transitions. Word has length 1306 [2020-12-21 23:47:36,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:47:36,664 INFO L481 AbstractCegarLoop]: Abstraction has 89984 states and 103195 transitions. [2020-12-21 23:47:36,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:47:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 89984 states and 103195 transitions. [2020-12-21 23:47:36,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1412 [2020-12-21 23:47:36,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:47:36,742 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:47:36,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-21 23:47:36,743 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:47:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:47:36,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1500731612, now seen corresponding path program 1 times [2020-12-21 23:47:36,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:47:36,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100994668] [2020-12-21 23:47:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:47:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:47:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 1181 proven. 89 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-12-21 23:47:40,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100994668] [2020-12-21 23:47:40,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313169433] [2020-12-21 23:47:40,589 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 [2020-12-21 23:47:41,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:47:41,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 23:47:41,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:47:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 1041 proven. 0 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-12-21 23:47:43,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:47:43,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2020-12-21 23:47:43,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434019545] [2020-12-21 23:47:43,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:47:43,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:47:43,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:47:43,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:47:43,351 INFO L87 Difference]: Start difference. First operand 89984 states and 103195 transitions. Second operand 3 states. [2020-12-21 23:47:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:47:50,066 INFO L93 Difference]: Finished difference Result 179148 states and 205564 transitions. [2020-12-21 23:47:50,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:47:50,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1411 [2020-12-21 23:47:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:47:50,182 INFO L225 Difference]: With dead ends: 179148 [2020-12-21 23:47:50,182 INFO L226 Difference]: Without dead ends: 89984 [2020-12-21 23:47:50,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1415 GetRequests, 1410 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:47:50,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89984 states. [2020-12-21 23:47:51,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89984 to 86712. [2020-12-21 23:47:51,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86712 states. [2020-12-21 23:47:51,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86712 states to 86712 states and 97637 transitions. [2020-12-21 23:47:51,231 INFO L78 Accepts]: Start accepts. Automaton has 86712 states and 97637 transitions. Word has length 1411 [2020-12-21 23:47:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:47:51,232 INFO L481 AbstractCegarLoop]: Abstraction has 86712 states and 97637 transitions. [2020-12-21 23:47:51,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:47:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 86712 states and 97637 transitions. [2020-12-21 23:47:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1431 [2020-12-21 23:47:51,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:47:51,309 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:47:51,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 23:47:51,516 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:47:51,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:47:51,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1191302771, now seen corresponding path program 1 times [2020-12-21 23:47:51,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:47:51,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017498400] [2020-12-21 23:47:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:47:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:47:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 1024 proven. 0 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2020-12-21 23:47:53,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017498400] [2020-12-21 23:47:53,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:47:53,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:47:53,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991761069] [2020-12-21 23:47:53,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:47:53,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:47:53,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:47:53,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:47:53,856 INFO L87 Difference]: Start difference. First operand 86712 states and 97637 transitions. Second operand 3 states. [2020-12-21 23:48:00,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:48:00,208 INFO L93 Difference]: Finished difference Result 172604 states and 194448 transitions. [2020-12-21 23:48:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:48:00,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1430 [2020-12-21 23:48:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:48:00,304 INFO L225 Difference]: With dead ends: 172604 [2020-12-21 23:48:00,304 INFO L226 Difference]: Without dead ends: 86712 [2020-12-21 23:48:00,344 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 [2020-12-21 23:48:00,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86712 states. [2020-12-21 23:48:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86712 to 85076. [2020-12-21 23:48:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85076 states. [2020-12-21 23:48:01,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85076 states to 85076 states and 93607 transitions. [2020-12-21 23:48:01,638 INFO L78 Accepts]: Start accepts. Automaton has 85076 states and 93607 transitions. Word has length 1430 [2020-12-21 23:48:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:48:01,639 INFO L481 AbstractCegarLoop]: Abstraction has 85076 states and 93607 transitions. [2020-12-21 23:48:01,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:48:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 85076 states and 93607 transitions. [2020-12-21 23:48:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1474 [2020-12-21 23:48:01,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:48:01,710 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:48:01,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-21 23:48:01,710 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:48:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:48:01,711 INFO L82 PathProgramCache]: Analyzing trace with hash -943014463, now seen corresponding path program 1 times [2020-12-21 23:48:01,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:48:01,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594916989] [2020-12-21 23:48:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:48:01,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:48:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1839 backedges. 1319 proven. 0 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2020-12-21 23:48:03,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594916989] [2020-12-21 23:48:03,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:48:03,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:48:03,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235834704] [2020-12-21 23:48:03,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:48:03,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:48:03,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:48:03,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:48:03,638 INFO L87 Difference]: Start difference. First operand 85076 states and 93607 transitions. Second operand 3 states. [2020-12-21 23:48:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:48:10,557 INFO L93 Difference]: Finished difference Result 170150 states and 187236 transitions. [2020-12-21 23:48:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:48:10,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1473 [2020-12-21 23:48:10,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:48:10,650 INFO L225 Difference]: With dead ends: 170150 [2020-12-21 23:48:10,650 INFO L226 Difference]: Without dead ends: 85894 [2020-12-21 23:48:10,696 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 [2020-12-21 23:48:10,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85894 states. [2020-12-21 23:48:11,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85894 to 84258. [2020-12-21 23:48:11,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84258 states. [2020-12-21 23:48:11,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84258 states to 84258 states and 90900 transitions. [2020-12-21 23:48:11,714 INFO L78 Accepts]: Start accepts. Automaton has 84258 states and 90900 transitions. Word has length 1473 [2020-12-21 23:48:11,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:48:11,714 INFO L481 AbstractCegarLoop]: Abstraction has 84258 states and 90900 transitions. [2020-12-21 23:48:11,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:48:11,715 INFO L276 IsEmpty]: Start isEmpty. Operand 84258 states and 90900 transitions. [2020-12-21 23:48:11,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1619 [2020-12-21 23:48:11,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:48:11,779 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:48:11,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-21 23:48:11,779 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:48:11,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:48:11,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1459338179, now seen corresponding path program 1 times [2020-12-21 23:48:11,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:48:11,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416209337] [2020-12-21 23:48:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:48:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:48:14,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 1819 proven. 0 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2020-12-21 23:48:14,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416209337] [2020-12-21 23:48:14,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:48:14,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:48:14,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445196790] [2020-12-21 23:48:14,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:48:14,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:48:14,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:48:14,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:48:14,446 INFO L87 Difference]: Start difference. First operand 84258 states and 90900 transitions. Second operand 3 states. [2020-12-21 23:48:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:48:21,086 INFO L93 Difference]: Finished difference Result 167696 states and 180974 transitions. [2020-12-21 23:48:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:48:21,087 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1618 [2020-12-21 23:48:21,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:48:21,174 INFO L225 Difference]: With dead ends: 167696 [2020-12-21 23:48:21,174 INFO L226 Difference]: Without dead ends: 84258 [2020-12-21 23:48:21,206 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 [2020-12-21 23:48:21,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84258 states. [2020-12-21 23:48:21,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84258 to 84258. [2020-12-21 23:48:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84258 states. [2020-12-21 23:48:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84258 states to 84258 states and 89436 transitions. [2020-12-21 23:48:22,425 INFO L78 Accepts]: Start accepts. Automaton has 84258 states and 89436 transitions. Word has length 1618 [2020-12-21 23:48:22,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:48:22,425 INFO L481 AbstractCegarLoop]: Abstraction has 84258 states and 89436 transitions. [2020-12-21 23:48:22,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:48:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 84258 states and 89436 transitions. [2020-12-21 23:48:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2074 [2020-12-21 23:48:22,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:48:22,540 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:48:22,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-21 23:48:22,541 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:48:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:48:22,542 INFO L82 PathProgramCache]: Analyzing trace with hash 2142858291, now seen corresponding path program 1 times [2020-12-21 23:48:22,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:48:22,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338842672] [2020-12-21 23:48:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:48:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:48:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2577 backedges. 1671 proven. 0 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2020-12-21 23:48:26,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338842672] [2020-12-21 23:48:26,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:48:26,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:48:26,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043737396] [2020-12-21 23:48:26,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:48:26,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:48:26,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:48:26,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:48:26,374 INFO L87 Difference]: Start difference. First operand 84258 states and 89436 transitions. Second operand 3 states. [2020-12-21 23:48:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:48:32,726 INFO L93 Difference]: Finished difference Result 170150 states and 180584 transitions. [2020-12-21 23:48:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:48:32,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2073 [2020-12-21 23:48:32,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:48:32,827 INFO L225 Difference]: With dead ends: 170150 [2020-12-21 23:48:32,828 INFO L226 Difference]: Without dead ends: 86712 [2020-12-21 23:48:32,871 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 [2020-12-21 23:48:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86712 states. [2020-12-21 23:48:33,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86712 to 86712. [2020-12-21 23:48:33,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86712 states. [2020-12-21 23:48:33,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86712 states to 86712 states and 91866 transitions. [2020-12-21 23:48:33,673 INFO L78 Accepts]: Start accepts. Automaton has 86712 states and 91866 transitions. Word has length 2073 [2020-12-21 23:48:33,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:48:33,674 INFO L481 AbstractCegarLoop]: Abstraction has 86712 states and 91866 transitions. [2020-12-21 23:48:33,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:48:33,674 INFO L276 IsEmpty]: Start isEmpty. Operand 86712 states and 91866 transitions. [2020-12-21 23:48:34,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2366 [2020-12-21 23:48:34,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:48:34,291 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:48:34,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-21 23:48:34,291 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:48:34,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:48:34,292 INFO L82 PathProgramCache]: Analyzing trace with hash 896699933, now seen corresponding path program 1 times [2020-12-21 23:48:34,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:48:34,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099222376] [2020-12-21 23:48:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:48:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:48:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4172 backedges. 2794 proven. 0 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2020-12-21 23:48:38,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099222376] [2020-12-21 23:48:38,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:48:38,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:48:38,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962311425] [2020-12-21 23:48:38,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:48:38,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:48:38,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:48:38,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 23:48:38,715 INFO L87 Difference]: Start difference. First operand 86712 states and 91866 transitions. Second operand 3 states. [2020-12-21 23:48:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:48:45,047 INFO L93 Difference]: Finished difference Result 173422 states and 183736 transitions. [2020-12-21 23:48:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:48:45,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2365 [2020-12-21 23:48:45,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:48:45,133 INFO L225 Difference]: With dead ends: 173422 [2020-12-21 23:48:45,133 INFO L226 Difference]: Without dead ends: 87530 [2020-12-21 23:48:45,163 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 [2020-12-21 23:48:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87530 states. [2020-12-21 23:48:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87530 to 85894. [2020-12-21 23:48:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85894 states. [2020-12-21 23:48:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85894 states to 85894 states and 90064 transitions. [2020-12-21 23:48:46,015 INFO L78 Accepts]: Start accepts. Automaton has 85894 states and 90064 transitions. Word has length 2365 [2020-12-21 23:48:46,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:48:46,016 INFO L481 AbstractCegarLoop]: Abstraction has 85894 states and 90064 transitions. [2020-12-21 23:48:46,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:48:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 85894 states and 90064 transitions. [2020-12-21 23:48:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2441 [2020-12-21 23:48:46,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:48:46,094 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:48:46,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-21 23:48:46,094 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:48:46,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:48:46,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1883473850, now seen corresponding path program 1 times [2020-12-21 23:48:46,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:48:46,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831884133] [2020-12-21 23:48:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:48:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:48:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 1777 proven. 0 refuted. 0 times theorem prover too weak. 1607 trivial. 0 not checked. [2020-12-21 23:48:52,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831884133] [2020-12-21 23:48:52,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 23:48:52,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 23:48:52,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881767799] [2020-12-21 23:48:52,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 23:48:52,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:48:52,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 23:48:52,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:48:52,339 INFO L87 Difference]: Start difference. First operand 85894 states and 90064 transitions. Second operand 4 states. [2020-12-21 23:49:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:49:01,338 INFO L93 Difference]: Finished difference Result 177512 states and 186050 transitions. [2020-12-21 23:49:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 23:49:01,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 2440 [2020-12-21 23:49:01,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:49:01,425 INFO L225 Difference]: With dead ends: 177512 [2020-12-21 23:49:01,425 INFO L226 Difference]: Without dead ends: 92438 [2020-12-21 23:49:01,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 23:49:01,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92438 states. [2020-12-21 23:49:02,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92438 to 89984. [2020-12-21 23:49:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89984 states. [2020-12-21 23:49:02,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89984 states to 89984 states and 94226 transitions. [2020-12-21 23:49:02,347 INFO L78 Accepts]: Start accepts. Automaton has 89984 states and 94226 transitions. Word has length 2440 [2020-12-21 23:49:02,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:49:02,348 INFO L481 AbstractCegarLoop]: Abstraction has 89984 states and 94226 transitions. [2020-12-21 23:49:02,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 23:49:02,348 INFO L276 IsEmpty]: Start isEmpty. Operand 89984 states and 94226 transitions. [2020-12-21 23:49:02,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2457 [2020-12-21 23:49:02,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:49:02,438 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:49:02,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-21 23:49:02,438 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:49:02,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:49:02,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1735630964, now seen corresponding path program 1 times [2020-12-21 23:49:02,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:49:02,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731163852] [2020-12-21 23:49:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:49:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:49:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4965 backedges. 2613 proven. 89 refuted. 0 times theorem prover too weak. 2263 trivial. 0 not checked. [2020-12-21 23:49:09,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731163852] [2020-12-21 23:49:09,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344046815] [2020-12-21 23:49:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:49:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 23:49:10,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 2888 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 23:49:10,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 23:49:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4965 backedges. 3455 proven. 0 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2020-12-21 23:49:15,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 23:49:15,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2020-12-21 23:49:15,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430649786] [2020-12-21 23:49:15,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 23:49:15,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 23:49:15,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 23:49:15,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:49:15,097 INFO L87 Difference]: Start difference. First operand 89984 states and 94226 transitions. Second operand 3 states. [2020-12-21 23:49:21,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 23:49:21,658 INFO L93 Difference]: Finished difference Result 179148 states and 187626 transitions. [2020-12-21 23:49:21,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 23:49:21,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2456 [2020-12-21 23:49:21,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 23:49:21,744 INFO L225 Difference]: With dead ends: 179148 [2020-12-21 23:49:21,745 INFO L226 Difference]: Without dead ends: 89984 [2020-12-21 23:49:21,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2460 GetRequests, 2455 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-21 23:49:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89984 states. [2020-12-21 23:49:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89984 to 85894. [2020-12-21 23:49:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85894 states. [2020-12-21 23:49:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85894 states to 85894 states and 88677 transitions. [2020-12-21 23:49:22,551 INFO L78 Accepts]: Start accepts. Automaton has 85894 states and 88677 transitions. Word has length 2456 [2020-12-21 23:49:22,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 23:49:22,552 INFO L481 AbstractCegarLoop]: Abstraction has 85894 states and 88677 transitions. [2020-12-21 23:49:22,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 23:49:22,552 INFO L276 IsEmpty]: Start isEmpty. Operand 85894 states and 88677 transitions. [2020-12-21 23:49:22,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4012 [2020-12-21 23:49:22,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 23:49:22,691 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 23:49:22,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 23:49:22,895 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 23:49:22,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 23:49:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash 858449351, now seen corresponding path program 1 times [2020-12-21 23:49:22,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 23:49:22,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698665474] [2020-12-21 23:49:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 23:49:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat