/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/systemc/token_ring.04.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:31:34,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:31:34,389 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:31:34,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:31:34,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:31:34,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:31:34,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:31:34,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:31:34,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:31:34,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:31:34,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:31:34,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:31:34,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:31:34,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:31:34,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:31:34,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:31:34,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:31:34,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:31:34,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:31:34,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:31:34,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:31:34,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:31:34,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:31:34,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:31:34,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:31:34,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:31:34,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:31:34,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:31:34,520 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:31:34,521 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:31:34,521 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:31:34,522 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:31:34,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:31:34,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:31:34,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:31:34,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:31:34,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:31:34,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:31:34,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:31:34,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:31:34,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:31:34,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 09:31:34,558 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:31:34,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:31:34,560 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:31:34,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:31:34,560 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:31:34,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:31:34,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:31:34,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:31:34,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:31:34,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:31:34,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:31:34,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:31:34,562 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:31:34,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:31:34,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:31:34,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:31:34,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:31:34,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:31:34,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:31:34,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:31:34,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:31:34,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:31:34,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:31:34,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:31:34,564 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:31:34,564 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:31:35,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:31:35,065 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:31:35,069 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:31:35,070 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:31:35,071 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:31:35,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2020-12-23 09:31:35,171 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b57e7ac7a/971432980a1b46e399a998ce85bca8c5/FLAG3c13416d7 [2020-12-23 09:31:35,916 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:31:35,917 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-2.c [2020-12-23 09:31:35,931 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b57e7ac7a/971432980a1b46e399a998ce85bca8c5/FLAG3c13416d7 [2020-12-23 09:31:36,206 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b57e7ac7a/971432980a1b46e399a998ce85bca8c5 [2020-12-23 09:31:36,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:31:36,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:31:36,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:31:36,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:31:36,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:31:36,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:31:36" (1/1) ... [2020-12-23 09:31:36,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed67fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:36, skipping insertion in model container [2020-12-23 09:31:36,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:31:36" (1/1) ... [2020-12-23 09:31:36,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:31:36,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:31:36,515 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-2.c[366,379] left hand side expression in assignment: lhs: VariableLHS[~token~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~local~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m_pc~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t1_pc~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t1_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t2_pc~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t2_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t3_pc~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t3_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t4_pc~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t4_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_M~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_M~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~__retres1~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~1,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~1,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~2,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~2,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~3,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~3,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~4,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~4,] left hand side expression in assignment: lhs: VariableLHS[~m_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t1_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t1_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t2_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t2_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t3_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t3_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t4_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t4_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~__retres1~5,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~5,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~5,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~5,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~5,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~5,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp_ndt_1~0,] left hand side expression in assignment: lhs: VariableLHS[~m_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp_ndt_2~0,] left hand side expression in assignment: lhs: VariableLHS[~t1_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp_ndt_3~0,] left hand side expression in assignment: lhs: VariableLHS[~t2_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp_ndt_4~0,] left hand side expression in assignment: lhs: VariableLHS[~t3_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp_ndt_5~0,] left hand side expression in assignment: lhs: VariableLHS[~t4_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~M_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T1_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T2_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T3_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T4_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_M~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~M_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T1_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T2_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T3_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T4_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_M~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~m_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~0,] left hand side expression in assignment: lhs: VariableLHS[~t1_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp___1~0,] left hand side expression in assignment: lhs: VariableLHS[~t2_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp___2~0,] left hand side expression in assignment: lhs: VariableLHS[~t3_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp___3~0,] left hand side expression in assignment: lhs: VariableLHS[~t4_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~M_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~M_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T1_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T2_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T3_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T4_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_M~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m_i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t1_i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t2_i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t3_i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t4_i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~2,] left hand side expression in assignment: lhs: VariableLHS[~__retres2~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres2~0,] left hand side expression in assignment: lhs: VariableLHS[~kernel_st~0,] left hand side expression in assignment: lhs: VariableLHS[~kernel_st~0,] left hand side expression in assignment: lhs: VariableLHS[~kernel_st~0,] left hand side expression in assignment: lhs: VariableLHS[~kernel_st~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~3,] left hand side expression in assignment: lhs: VariableLHS[~kernel_st~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~1,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] [2020-12-23 09:31:36,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:31:36,632 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:31:36,646 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.04.cil-2.c[366,379] left hand side expression in assignment: lhs: VariableLHS[~token~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~local~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m_pc~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t1_pc~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t1_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t2_pc~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t2_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t3_pc~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t3_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t4_pc~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t4_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_M~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_M~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~__retres1~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~1,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~1,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~2,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~2,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~3,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~3,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~4,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~4,] left hand side expression in assignment: lhs: VariableLHS[~m_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t1_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t1_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t2_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t2_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t3_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t3_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t4_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t4_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~__retres1~5,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~5,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~5,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~5,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~5,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~5,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp_ndt_1~0,] left hand side expression in assignment: lhs: VariableLHS[~m_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp_ndt_2~0,] left hand side expression in assignment: lhs: VariableLHS[~t1_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp_ndt_3~0,] left hand side expression in assignment: lhs: VariableLHS[~t2_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp_ndt_4~0,] left hand side expression in assignment: lhs: VariableLHS[~t3_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp_ndt_5~0,] left hand side expression in assignment: lhs: VariableLHS[~t4_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~M_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T1_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T2_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T3_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T4_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_M~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~M_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T1_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T2_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T3_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T4_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_M~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~m_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~0,] left hand side expression in assignment: lhs: VariableLHS[~t1_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp___1~0,] left hand side expression in assignment: lhs: VariableLHS[~t2_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp___2~0,] left hand side expression in assignment: lhs: VariableLHS[~t3_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp___3~0,] left hand side expression in assignment: lhs: VariableLHS[~t4_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~M_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~M_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T1_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T2_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T3_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~T4_E~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_M~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m_i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t1_i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t2_i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t3_i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t4_i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~2,] left hand side expression in assignment: lhs: VariableLHS[~__retres2~0,] left hand side expression in assignment: lhs: VariableLHS[~__retres2~0,] left hand side expression in assignment: lhs: VariableLHS[~kernel_st~0,] left hand side expression in assignment: lhs: VariableLHS[~kernel_st~0,] left hand side expression in assignment: lhs: VariableLHS[~kernel_st~0,] left hand side expression in assignment: lhs: VariableLHS[~kernel_st~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~3,] left hand side expression in assignment: lhs: VariableLHS[~kernel_st~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp___0~1,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] [2020-12-23 09:31:36,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:31:36,731 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:31:36,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:36 WrapperNode [2020-12-23 09:31:36,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:31:36,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:31:36,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:31:36,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:31:36,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:36" (1/1) ... [2020-12-23 09:31:36,756 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:36" (1/1) ... [2020-12-23 09:31:36,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:31:36,817 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:31:36,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:31:36,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:31:36,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:36" (1/1) ... [2020-12-23 09:31:36,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:36" (1/1) ... [2020-12-23 09:31:36,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:36" (1/1) ... [2020-12-23 09:31:36,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:36" (1/1) ... [2020-12-23 09:31:36,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:36" (1/1) ... [2020-12-23 09:31:36,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:36" (1/1) ... [2020-12-23 09:31:36,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:36" (1/1) ... [2020-12-23 09:31:36,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:31:36,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:31:36,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:31:36,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:31:36,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:31:37,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:31:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:31:37,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:31:37,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:31:38,466 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:31:38,467 INFO L299 CfgBuilder]: Removed 163 assume(true) statements. [2020-12-23 09:31:38,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:31:38 BoogieIcfgContainer [2020-12-23 09:31:38,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:31:38,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:31:38,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:31:38,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:31:38,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:31:36" (1/3) ... [2020-12-23 09:31:38,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef9d32f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:31:38, skipping insertion in model container [2020-12-23 09:31:38,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:36" (2/3) ... [2020-12-23 09:31:38,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef9d32f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:31:38, skipping insertion in model container [2020-12-23 09:31:38,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:31:38" (3/3) ... [2020-12-23 09:31:38,479 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.04.cil-2.c [2020-12-23 09:31:38,486 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:31:38,492 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 09:31:38,514 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 09:31:38,544 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:31:38,545 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:31:38,545 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:31:38,545 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:31:38,545 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:31:38,545 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:31:38,546 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:31:38,546 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:31:38,572 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states. [2020-12-23 09:31:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:38,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:38,583 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] [2020-12-23 09:31:38,584 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:38,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:38,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1090379614, now seen corresponding path program 1 times [2020-12-23 09:31:38,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:38,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361677907] [2020-12-23 09:31:38,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:38,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:38,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361677907] [2020-12-23 09:31:38,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:38,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:38,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409860244] [2020-12-23 09:31:38,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:38,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:38,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:38,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:38,857 INFO L87 Difference]: Start difference. First operand 421 states. Second operand 3 states. [2020-12-23 09:31:38,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:38,968 INFO L93 Difference]: Finished difference Result 837 states and 1301 transitions. [2020-12-23 09:31:38,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:38,976 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-23 09:31:38,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:39,009 INFO L225 Difference]: With dead ends: 837 [2020-12-23 09:31:39,009 INFO L226 Difference]: Without dead ends: 417 [2020-12-23 09:31:39,020 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 [2020-12-23 09:31:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-12-23 09:31:39,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2020-12-23 09:31:39,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2020-12-23 09:31:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 633 transitions. [2020-12-23 09:31:39,117 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 633 transitions. Word has length 72 [2020-12-23 09:31:39,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:39,117 INFO L481 AbstractCegarLoop]: Abstraction has 417 states and 633 transitions. [2020-12-23 09:31:39,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 633 transitions. [2020-12-23 09:31:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:39,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:39,121 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] [2020-12-23 09:31:39,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:31:39,122 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:39,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:39,123 INFO L82 PathProgramCache]: Analyzing trace with hash 136439456, now seen corresponding path program 1 times [2020-12-23 09:31:39,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:39,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151419388] [2020-12-23 09:31:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:39,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151419388] [2020-12-23 09:31:39,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:39,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:31:39,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157788107] [2020-12-23 09:31:39,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:39,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:39,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:39,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:39,221 INFO L87 Difference]: Start difference. First operand 417 states and 633 transitions. Second operand 3 states. [2020-12-23 09:31:39,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:39,317 INFO L93 Difference]: Finished difference Result 1143 states and 1731 transitions. [2020-12-23 09:31:39,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:39,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-23 09:31:39,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:39,325 INFO L225 Difference]: With dead ends: 1143 [2020-12-23 09:31:39,325 INFO L226 Difference]: Without dead ends: 735 [2020-12-23 09:31:39,327 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 [2020-12-23 09:31:39,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2020-12-23 09:31:39,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 731. [2020-12-23 09:31:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-23 09:31:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1106 transitions. [2020-12-23 09:31:39,412 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1106 transitions. Word has length 72 [2020-12-23 09:31:39,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:39,413 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1106 transitions. [2020-12-23 09:31:39,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:39,413 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1106 transitions. [2020-12-23 09:31:39,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:39,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:39,425 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] [2020-12-23 09:31:39,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:31:39,426 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:39,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:39,428 INFO L82 PathProgramCache]: Analyzing trace with hash -51966948, now seen corresponding path program 1 times [2020-12-23 09:31:39,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:39,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265873257] [2020-12-23 09:31:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:39,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265873257] [2020-12-23 09:31:39,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:39,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:39,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437420827] [2020-12-23 09:31:39,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:39,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:39,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:39,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:39,578 INFO L87 Difference]: Start difference. First operand 731 states and 1106 transitions. Second operand 4 states. [2020-12-23 09:31:39,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:39,693 INFO L93 Difference]: Finished difference Result 1769 states and 2672 transitions. [2020-12-23 09:31:39,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:39,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-23 09:31:39,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:39,700 INFO L225 Difference]: With dead ends: 1769 [2020-12-23 09:31:39,700 INFO L226 Difference]: Without dead ends: 1048 [2020-12-23 09:31:39,702 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 [2020-12-23 09:31:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2020-12-23 09:31:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 731. [2020-12-23 09:31:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-23 09:31:39,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1103 transitions. [2020-12-23 09:31:39,774 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1103 transitions. Word has length 72 [2020-12-23 09:31:39,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:39,774 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1103 transitions. [2020-12-23 09:31:39,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:31:39,775 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1103 transitions. [2020-12-23 09:31:39,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:39,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:39,776 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] [2020-12-23 09:31:39,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 09:31:39,777 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:39,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:39,777 INFO L82 PathProgramCache]: Analyzing trace with hash -469363554, now seen corresponding path program 1 times [2020-12-23 09:31:39,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:39,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731196092] [2020-12-23 09:31:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:39,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731196092] [2020-12-23 09:31:39,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:39,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292309541] [2020-12-23 09:31:39,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:39,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:39,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:39,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:39,896 INFO L87 Difference]: Start difference. First operand 731 states and 1103 transitions. Second operand 4 states. [2020-12-23 09:31:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:40,021 INFO L93 Difference]: Finished difference Result 1767 states and 2662 transitions. [2020-12-23 09:31:40,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:40,022 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-23 09:31:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:40,028 INFO L225 Difference]: With dead ends: 1767 [2020-12-23 09:31:40,028 INFO L226 Difference]: Without dead ends: 1047 [2020-12-23 09:31:40,030 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 [2020-12-23 09:31:40,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2020-12-23 09:31:40,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 731. [2020-12-23 09:31:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-23 09:31:40,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1100 transitions. [2020-12-23 09:31:40,075 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1100 transitions. Word has length 72 [2020-12-23 09:31:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:40,077 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1100 transitions. [2020-12-23 09:31:40,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:31:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1100 transitions. [2020-12-23 09:31:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:40,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:40,079 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] [2020-12-23 09:31:40,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 09:31:40,079 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:40,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:40,081 INFO L82 PathProgramCache]: Analyzing trace with hash 209908700, now seen corresponding path program 1 times [2020-12-23 09:31:40,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:40,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068024635] [2020-12-23 09:31:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:40,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068024635] [2020-12-23 09:31:40,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:40,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:31:40,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732145588] [2020-12-23 09:31:40,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:40,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:40,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:40,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:40,201 INFO L87 Difference]: Start difference. First operand 731 states and 1100 transitions. Second operand 3 states. [2020-12-23 09:31:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:40,249 INFO L93 Difference]: Finished difference Result 1450 states and 2183 transitions. [2020-12-23 09:31:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:40,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-23 09:31:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:40,254 INFO L225 Difference]: With dead ends: 1450 [2020-12-23 09:31:40,254 INFO L226 Difference]: Without dead ends: 731 [2020-12-23 09:31:40,255 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 [2020-12-23 09:31:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-12-23 09:31:40,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2020-12-23 09:31:40,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-23 09:31:40,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1092 transitions. [2020-12-23 09:31:40,295 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1092 transitions. Word has length 72 [2020-12-23 09:31:40,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:40,295 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1092 transitions. [2020-12-23 09:31:40,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:40,295 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1092 transitions. [2020-12-23 09:31:40,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:40,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:40,296 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] [2020-12-23 09:31:40,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 09:31:40,297 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:40,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:40,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1700782112, now seen corresponding path program 1 times [2020-12-23 09:31:40,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:40,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408289713] [2020-12-23 09:31:40,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:40,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:40,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408289713] [2020-12-23 09:31:40,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:40,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:31:40,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490796573] [2020-12-23 09:31:40,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:40,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:40,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:40,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:40,393 INFO L87 Difference]: Start difference. First operand 731 states and 1092 transitions. Second operand 3 states. [2020-12-23 09:31:40,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:40,463 INFO L93 Difference]: Finished difference Result 1448 states and 2164 transitions. [2020-12-23 09:31:40,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:40,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-23 09:31:40,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:40,468 INFO L225 Difference]: With dead ends: 1448 [2020-12-23 09:31:40,468 INFO L226 Difference]: Without dead ends: 731 [2020-12-23 09:31:40,470 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 [2020-12-23 09:31:40,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-12-23 09:31:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2020-12-23 09:31:40,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-23 09:31:40,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1072 transitions. [2020-12-23 09:31:40,549 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1072 transitions. Word has length 72 [2020-12-23 09:31:40,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:40,549 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1072 transitions. [2020-12-23 09:31:40,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:40,549 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1072 transitions. [2020-12-23 09:31:40,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:40,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:40,551 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] [2020-12-23 09:31:40,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 09:31:40,551 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:40,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:40,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1192162725, now seen corresponding path program 1 times [2020-12-23 09:31:40,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:40,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700125033] [2020-12-23 09:31:40,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:40,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700125033] [2020-12-23 09:31:40,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:40,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:40,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146858480] [2020-12-23 09:31:40,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:40,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:40,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:40,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:40,662 INFO L87 Difference]: Start difference. First operand 731 states and 1072 transitions. Second operand 4 states. [2020-12-23 09:31:40,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:40,810 INFO L93 Difference]: Finished difference Result 1724 states and 2528 transitions. [2020-12-23 09:31:40,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:40,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-23 09:31:40,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:40,818 INFO L225 Difference]: With dead ends: 1724 [2020-12-23 09:31:40,818 INFO L226 Difference]: Without dead ends: 1008 [2020-12-23 09:31:40,822 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 [2020-12-23 09:31:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2020-12-23 09:31:40,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 731. [2020-12-23 09:31:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-23 09:31:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1069 transitions. [2020-12-23 09:31:40,878 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1069 transitions. Word has length 72 [2020-12-23 09:31:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:40,878 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1069 transitions. [2020-12-23 09:31:40,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:31:40,878 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1069 transitions. [2020-12-23 09:31:40,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:40,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:40,879 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] [2020-12-23 09:31:40,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 09:31:40,880 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:40,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:40,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1625891811, now seen corresponding path program 1 times [2020-12-23 09:31:40,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:40,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067489462] [2020-12-23 09:31:40,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:40,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067489462] [2020-12-23 09:31:40,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:40,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:31:40,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341953234] [2020-12-23 09:31:40,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:40,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:40,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:40,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:40,954 INFO L87 Difference]: Start difference. First operand 731 states and 1069 transitions. Second operand 3 states. [2020-12-23 09:31:41,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:41,025 INFO L93 Difference]: Finished difference Result 1446 states and 2116 transitions. [2020-12-23 09:31:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:41,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-23 09:31:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:41,030 INFO L225 Difference]: With dead ends: 1446 [2020-12-23 09:31:41,030 INFO L226 Difference]: Without dead ends: 731 [2020-12-23 09:31:41,034 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 [2020-12-23 09:31:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-12-23 09:31:41,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2020-12-23 09:31:41,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-23 09:31:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1049 transitions. [2020-12-23 09:31:41,079 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1049 transitions. Word has length 72 [2020-12-23 09:31:41,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:41,079 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1049 transitions. [2020-12-23 09:31:41,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:41,079 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1049 transitions. [2020-12-23 09:31:41,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:41,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:41,080 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] [2020-12-23 09:31:41,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 09:31:41,081 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:41,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:41,082 INFO L82 PathProgramCache]: Analyzing trace with hash 813286440, now seen corresponding path program 1 times [2020-12-23 09:31:41,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:41,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007874455] [2020-12-23 09:31:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:41,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:41,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007874455] [2020-12-23 09:31:41,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:41,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:31:41,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930539864] [2020-12-23 09:31:41,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:41,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:41,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:41,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:41,169 INFO L87 Difference]: Start difference. First operand 731 states and 1049 transitions. Second operand 3 states. [2020-12-23 09:31:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:41,238 INFO L93 Difference]: Finished difference Result 1445 states and 2075 transitions. [2020-12-23 09:31:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:41,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-23 09:31:41,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:41,244 INFO L225 Difference]: With dead ends: 1445 [2020-12-23 09:31:41,244 INFO L226 Difference]: Without dead ends: 731 [2020-12-23 09:31:41,245 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 [2020-12-23 09:31:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2020-12-23 09:31:41,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 731. [2020-12-23 09:31:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-23 09:31:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1029 transitions. [2020-12-23 09:31:41,293 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1029 transitions. Word has length 72 [2020-12-23 09:31:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:41,293 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1029 transitions. [2020-12-23 09:31:41,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:41,293 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1029 transitions. [2020-12-23 09:31:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:41,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:41,294 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] [2020-12-23 09:31:41,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 09:31:41,295 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:41,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:41,295 INFO L82 PathProgramCache]: Analyzing trace with hash -167107164, now seen corresponding path program 1 times [2020-12-23 09:31:41,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:41,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751218874] [2020-12-23 09:31:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:41,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751218874] [2020-12-23 09:31:41,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:41,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:41,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69092988] [2020-12-23 09:31:41,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:41,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:41,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:41,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:41,337 INFO L87 Difference]: Start difference. First operand 731 states and 1029 transitions. Second operand 4 states. [2020-12-23 09:31:41,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:41,484 INFO L93 Difference]: Finished difference Result 1718 states and 2420 transitions. [2020-12-23 09:31:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:41,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-23 09:31:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:41,493 INFO L225 Difference]: With dead ends: 1718 [2020-12-23 09:31:41,493 INFO L226 Difference]: Without dead ends: 1005 [2020-12-23 09:31:41,495 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 [2020-12-23 09:31:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2020-12-23 09:31:41,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 731. [2020-12-23 09:31:41,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-12-23 09:31:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 1026 transitions. [2020-12-23 09:31:41,543 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 1026 transitions. Word has length 72 [2020-12-23 09:31:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:41,544 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 1026 transitions. [2020-12-23 09:31:41,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:31:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 1026 transitions. [2020-12-23 09:31:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:41,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:41,545 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] [2020-12-23 09:31:41,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 09:31:41,545 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:41,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:41,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1219678246, now seen corresponding path program 1 times [2020-12-23 09:31:41,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:41,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275251009] [2020-12-23 09:31:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:41,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275251009] [2020-12-23 09:31:41,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:41,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:31:41,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423031340] [2020-12-23 09:31:41,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:31:41,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:41,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:31:41,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:31:41,595 INFO L87 Difference]: Start difference. First operand 731 states and 1026 transitions. Second operand 5 states. [2020-12-23 09:31:41,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:41,794 INFO L93 Difference]: Finished difference Result 1819 states and 2574 transitions. [2020-12-23 09:31:41,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:31:41,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-23 09:31:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:41,801 INFO L225 Difference]: With dead ends: 1819 [2020-12-23 09:31:41,801 INFO L226 Difference]: Without dead ends: 1113 [2020-12-23 09:31:41,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:31:41,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2020-12-23 09:31:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 737. [2020-12-23 09:31:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2020-12-23 09:31:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1020 transitions. [2020-12-23 09:31:41,878 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1020 transitions. Word has length 72 [2020-12-23 09:31:41,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:41,878 INFO L481 AbstractCegarLoop]: Abstraction has 737 states and 1020 transitions. [2020-12-23 09:31:41,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:31:41,878 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1020 transitions. [2020-12-23 09:31:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:41,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:41,881 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] [2020-12-23 09:31:41,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 09:31:41,881 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1204159528, now seen corresponding path program 1 times [2020-12-23 09:31:41,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:41,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781507009] [2020-12-23 09:31:41,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:41,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781507009] [2020-12-23 09:31:41,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:41,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:31:41,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951940177] [2020-12-23 09:31:41,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:31:41,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:41,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:31:41,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:31:41,939 INFO L87 Difference]: Start difference. First operand 737 states and 1020 transitions. Second operand 5 states. [2020-12-23 09:31:42,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:42,187 INFO L93 Difference]: Finished difference Result 2641 states and 3665 transitions. [2020-12-23 09:31:42,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:31:42,188 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-23 09:31:42,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:42,199 INFO L225 Difference]: With dead ends: 2641 [2020-12-23 09:31:42,200 INFO L226 Difference]: Without dead ends: 1936 [2020-12-23 09:31:42,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:31:42,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2020-12-23 09:31:42,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 779. [2020-12-23 09:31:42,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 779 states. [2020-12-23 09:31:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1062 transitions. [2020-12-23 09:31:42,291 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1062 transitions. Word has length 72 [2020-12-23 09:31:42,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:42,295 INFO L481 AbstractCegarLoop]: Abstraction has 779 states and 1062 transitions. [2020-12-23 09:31:42,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:31:42,295 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1062 transitions. [2020-12-23 09:31:42,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:42,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:42,298 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] [2020-12-23 09:31:42,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 09:31:42,298 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:42,299 INFO L82 PathProgramCache]: Analyzing trace with hash 306766250, now seen corresponding path program 1 times [2020-12-23 09:31:42,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:42,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906724935] [2020-12-23 09:31:42,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:42,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906724935] [2020-12-23 09:31:42,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:42,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:31:42,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583526279] [2020-12-23 09:31:42,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:31:42,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:42,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:31:42,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:31:42,345 INFO L87 Difference]: Start difference. First operand 779 states and 1062 transitions. Second operand 5 states. [2020-12-23 09:31:42,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:42,529 INFO L93 Difference]: Finished difference Result 2052 states and 2811 transitions. [2020-12-23 09:31:42,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:31:42,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-23 09:31:42,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:42,537 INFO L225 Difference]: With dead ends: 2052 [2020-12-23 09:31:42,537 INFO L226 Difference]: Without dead ends: 1315 [2020-12-23 09:31:42,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:31:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2020-12-23 09:31:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 785. [2020-12-23 09:31:42,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 785 states. [2020-12-23 09:31:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1056 transitions. [2020-12-23 09:31:42,615 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1056 transitions. Word has length 72 [2020-12-23 09:31:42,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:42,615 INFO L481 AbstractCegarLoop]: Abstraction has 785 states and 1056 transitions. [2020-12-23 09:31:42,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:31:42,615 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1056 transitions. [2020-12-23 09:31:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:42,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:42,616 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] [2020-12-23 09:31:42,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 09:31:42,617 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:42,617 INFO L82 PathProgramCache]: Analyzing trace with hash 966297772, now seen corresponding path program 1 times [2020-12-23 09:31:42,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:42,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348551791] [2020-12-23 09:31:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:42,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348551791] [2020-12-23 09:31:42,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:42,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:31:42,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567863637] [2020-12-23 09:31:42,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:31:42,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:42,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:31:42,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:31:42,679 INFO L87 Difference]: Start difference. First operand 785 states and 1056 transitions. Second operand 5 states. [2020-12-23 09:31:42,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:42,911 INFO L93 Difference]: Finished difference Result 2119 states and 2861 transitions. [2020-12-23 09:31:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:31:42,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-23 09:31:42,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:42,919 INFO L225 Difference]: With dead ends: 2119 [2020-12-23 09:31:42,920 INFO L226 Difference]: Without dead ends: 1383 [2020-12-23 09:31:42,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:31:42,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2020-12-23 09:31:42,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 791. [2020-12-23 09:31:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 791 states. [2020-12-23 09:31:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1050 transitions. [2020-12-23 09:31:42,993 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1050 transitions. Word has length 72 [2020-12-23 09:31:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:42,995 INFO L481 AbstractCegarLoop]: Abstraction has 791 states and 1050 transitions. [2020-12-23 09:31:42,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:31:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1050 transitions. [2020-12-23 09:31:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:31:42,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:42,996 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] [2020-12-23 09:31:42,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 09:31:42,996 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:42,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1667897646, now seen corresponding path program 1 times [2020-12-23 09:31:42,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:42,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983337935] [2020-12-23 09:31:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:43,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983337935] [2020-12-23 09:31:43,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:43,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:43,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233409592] [2020-12-23 09:31:43,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:43,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:43,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:43,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:43,052 INFO L87 Difference]: Start difference. First operand 791 states and 1050 transitions. Second operand 4 states. [2020-12-23 09:31:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:43,390 INFO L93 Difference]: Finished difference Result 2803 states and 3720 transitions. [2020-12-23 09:31:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:43,391 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-23 09:31:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:43,401 INFO L225 Difference]: With dead ends: 2803 [2020-12-23 09:31:43,401 INFO L226 Difference]: Without dead ends: 2032 [2020-12-23 09:31:43,405 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 [2020-12-23 09:31:43,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2020-12-23 09:31:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 1936. [2020-12-23 09:31:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1936 states. [2020-12-23 09:31:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1936 states to 1936 states and 2545 transitions. [2020-12-23 09:31:43,594 INFO L78 Accepts]: Start accepts. Automaton has 1936 states and 2545 transitions. Word has length 72 [2020-12-23 09:31:43,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:43,594 INFO L481 AbstractCegarLoop]: Abstraction has 1936 states and 2545 transitions. [2020-12-23 09:31:43,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:31:43,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1936 states and 2545 transitions. [2020-12-23 09:31:43,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 09:31:43,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:43,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:43,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 09:31:43,596 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:43,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:43,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1599707443, now seen corresponding path program 1 times [2020-12-23 09:31:43,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:43,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271095810] [2020-12-23 09:31:43,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:31:43,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271095810] [2020-12-23 09:31:43,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:43,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:31:43,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479673420] [2020-12-23 09:31:43,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:31:43,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:43,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:31:43,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:31:43,643 INFO L87 Difference]: Start difference. First operand 1936 states and 2545 transitions. Second operand 5 states. [2020-12-23 09:31:44,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:44,086 INFO L93 Difference]: Finished difference Result 4730 states and 6262 transitions. [2020-12-23 09:31:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:31:44,087 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2020-12-23 09:31:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:44,101 INFO L225 Difference]: With dead ends: 4730 [2020-12-23 09:31:44,101 INFO L226 Difference]: Without dead ends: 2848 [2020-12-23 09:31:44,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:31:44,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2020-12-23 09:31:44,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 1975. [2020-12-23 09:31:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2020-12-23 09:31:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2563 transitions. [2020-12-23 09:31:44,276 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2563 transitions. Word has length 87 [2020-12-23 09:31:44,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:44,277 INFO L481 AbstractCegarLoop]: Abstraction has 1975 states and 2563 transitions. [2020-12-23 09:31:44,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:31:44,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2563 transitions. [2020-12-23 09:31:44,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 09:31:44,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:44,279 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:44,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 09:31:44,279 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:44,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:44,280 INFO L82 PathProgramCache]: Analyzing trace with hash 227900145, now seen corresponding path program 1 times [2020-12-23 09:31:44,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:44,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182045506] [2020-12-23 09:31:44,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:31:44,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182045506] [2020-12-23 09:31:44,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:44,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:44,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10685341] [2020-12-23 09:31:44,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:44,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:44,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:44,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:44,332 INFO L87 Difference]: Start difference. First operand 1975 states and 2563 transitions. Second operand 4 states. [2020-12-23 09:31:44,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:44,638 INFO L93 Difference]: Finished difference Result 4765 states and 6185 transitions. [2020-12-23 09:31:44,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:44,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-12-23 09:31:44,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:44,653 INFO L225 Difference]: With dead ends: 4765 [2020-12-23 09:31:44,654 INFO L226 Difference]: Without dead ends: 2847 [2020-12-23 09:31:44,658 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 [2020-12-23 09:31:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2020-12-23 09:31:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 1975. [2020-12-23 09:31:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2020-12-23 09:31:44,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2550 transitions. [2020-12-23 09:31:44,859 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2550 transitions. Word has length 87 [2020-12-23 09:31:44,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:44,859 INFO L481 AbstractCegarLoop]: Abstraction has 1975 states and 2550 transitions. [2020-12-23 09:31:44,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:31:44,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2550 transitions. [2020-12-23 09:31:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 09:31:44,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:44,861 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:44,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 09:31:44,861 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:44,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:44,862 INFO L82 PathProgramCache]: Analyzing trace with hash 887431667, now seen corresponding path program 1 times [2020-12-23 09:31:44,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:44,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105784597] [2020-12-23 09:31:44,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:31:44,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105784597] [2020-12-23 09:31:44,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:44,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:31:44,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845280456] [2020-12-23 09:31:44,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:44,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:44,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:44,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:44,931 INFO L87 Difference]: Start difference. First operand 1975 states and 2550 transitions. Second operand 3 states. [2020-12-23 09:31:45,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:45,121 INFO L93 Difference]: Finished difference Result 3937 states and 5082 transitions. [2020-12-23 09:31:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:45,121 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-23 09:31:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:45,131 INFO L225 Difference]: With dead ends: 3937 [2020-12-23 09:31:45,131 INFO L226 Difference]: Without dead ends: 1975 [2020-12-23 09:31:45,135 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 [2020-12-23 09:31:45,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2020-12-23 09:31:45,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1975. [2020-12-23 09:31:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1975 states. [2020-12-23 09:31:45,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2530 transitions. [2020-12-23 09:31:45,310 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2530 transitions. Word has length 87 [2020-12-23 09:31:45,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:45,311 INFO L481 AbstractCegarLoop]: Abstraction has 1975 states and 2530 transitions. [2020-12-23 09:31:45,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:45,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2530 transitions. [2020-12-23 09:31:45,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 09:31:45,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:45,312 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:45,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 09:31:45,313 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:45,314 INFO L82 PathProgramCache]: Analyzing trace with hash 43426165, now seen corresponding path program 1 times [2020-12-23 09:31:45,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:45,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784210706] [2020-12-23 09:31:45,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:31:45,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784210706] [2020-12-23 09:31:45,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:45,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:45,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751489760] [2020-12-23 09:31:45,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:45,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:45,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:45,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:45,392 INFO L87 Difference]: Start difference. First operand 1975 states and 2530 transitions. Second operand 4 states. [2020-12-23 09:31:45,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:45,732 INFO L93 Difference]: Finished difference Result 4691 states and 5998 transitions. [2020-12-23 09:31:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:45,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-12-23 09:31:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:45,746 INFO L225 Difference]: With dead ends: 4691 [2020-12-23 09:31:45,746 INFO L226 Difference]: Without dead ends: 2747 [2020-12-23 09:31:45,750 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 [2020-12-23 09:31:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2020-12-23 09:31:45,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 1885. [2020-12-23 09:31:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1885 states. [2020-12-23 09:31:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1885 states to 1885 states and 2367 transitions. [2020-12-23 09:31:45,985 INFO L78 Accepts]: Start accepts. Automaton has 1885 states and 2367 transitions. Word has length 87 [2020-12-23 09:31:45,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:45,986 INFO L481 AbstractCegarLoop]: Abstraction has 1885 states and 2367 transitions. [2020-12-23 09:31:45,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:31:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1885 states and 2367 transitions. [2020-12-23 09:31:45,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 09:31:45,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:45,988 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:45,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 09:31:45,988 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:45,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:45,989 INFO L82 PathProgramCache]: Analyzing trace with hash -28960393, now seen corresponding path program 1 times [2020-12-23 09:31:45,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:45,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880325923] [2020-12-23 09:31:45,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:46,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880325923] [2020-12-23 09:31:46,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:46,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:46,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108537090] [2020-12-23 09:31:46,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:46,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:46,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:46,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:46,041 INFO L87 Difference]: Start difference. First operand 1885 states and 2367 transitions. Second operand 3 states. [2020-12-23 09:31:46,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:46,502 INFO L93 Difference]: Finished difference Result 5302 states and 6598 transitions. [2020-12-23 09:31:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:46,503 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 87 [2020-12-23 09:31:46,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:46,512 INFO L225 Difference]: With dead ends: 5302 [2020-12-23 09:31:46,513 INFO L226 Difference]: Without dead ends: 3478 [2020-12-23 09:31:46,516 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 [2020-12-23 09:31:46,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2020-12-23 09:31:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 3478. [2020-12-23 09:31:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3478 states. [2020-12-23 09:31:47,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3478 states to 3478 states and 4277 transitions. [2020-12-23 09:31:47,007 INFO L78 Accepts]: Start accepts. Automaton has 3478 states and 4277 transitions. Word has length 87 [2020-12-23 09:31:47,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:47,008 INFO L481 AbstractCegarLoop]: Abstraction has 3478 states and 4277 transitions. [2020-12-23 09:31:47,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:47,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3478 states and 4277 transitions. [2020-12-23 09:31:47,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 09:31:47,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:47,010 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-23 09:31:47,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-23 09:31:47,010 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:47,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:47,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1257798348, now seen corresponding path program 1 times [2020-12-23 09:31:47,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:47,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243260624] [2020-12-23 09:31:47,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:47,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243260624] [2020-12-23 09:31:47,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:47,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:47,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553003799] [2020-12-23 09:31:47,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:47,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:47,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:47,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:47,055 INFO L87 Difference]: Start difference. First operand 3478 states and 4277 transitions. Second operand 3 states. [2020-12-23 09:31:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:47,677 INFO L93 Difference]: Finished difference Result 9616 states and 11809 transitions. [2020-12-23 09:31:47,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:47,678 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2020-12-23 09:31:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:47,696 INFO L225 Difference]: With dead ends: 9616 [2020-12-23 09:31:47,696 INFO L226 Difference]: Without dead ends: 6256 [2020-12-23 09:31:47,702 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 [2020-12-23 09:31:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2020-12-23 09:31:48,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 6252. [2020-12-23 09:31:48,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6252 states. [2020-12-23 09:31:48,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6252 states to 6252 states and 7635 transitions. [2020-12-23 09:31:48,255 INFO L78 Accepts]: Start accepts. Automaton has 6252 states and 7635 transitions. Word has length 88 [2020-12-23 09:31:48,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:48,255 INFO L481 AbstractCegarLoop]: Abstraction has 6252 states and 7635 transitions. [2020-12-23 09:31:48,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:48,255 INFO L276 IsEmpty]: Start isEmpty. Operand 6252 states and 7635 transitions. [2020-12-23 09:31:48,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 09:31:48,257 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:48,258 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:48,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 09:31:48,258 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:48,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:48,259 INFO L82 PathProgramCache]: Analyzing trace with hash 657646591, now seen corresponding path program 1 times [2020-12-23 09:31:48,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:48,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194588787] [2020-12-23 09:31:48,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:48,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194588787] [2020-12-23 09:31:48,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:48,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:48,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485432235] [2020-12-23 09:31:48,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:48,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:48,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:48,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:48,301 INFO L87 Difference]: Start difference. First operand 6252 states and 7635 transitions. Second operand 3 states. [2020-12-23 09:31:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:49,468 INFO L93 Difference]: Finished difference Result 17538 states and 21399 transitions. [2020-12-23 09:31:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:49,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-12-23 09:31:49,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:49,494 INFO L225 Difference]: With dead ends: 17538 [2020-12-23 09:31:49,495 INFO L226 Difference]: Without dead ends: 11404 [2020-12-23 09:31:49,506 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 [2020-12-23 09:31:49,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2020-12-23 09:31:50,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 11400. [2020-12-23 09:31:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11400 states. [2020-12-23 09:31:50,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11400 states to 11400 states and 13855 transitions. [2020-12-23 09:31:50,278 INFO L78 Accepts]: Start accepts. Automaton has 11400 states and 13855 transitions. Word has length 89 [2020-12-23 09:31:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:50,278 INFO L481 AbstractCegarLoop]: Abstraction has 11400 states and 13855 transitions. [2020-12-23 09:31:50,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 11400 states and 13855 transitions. [2020-12-23 09:31:50,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 09:31:50,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:50,333 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:50,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-23 09:31:50,333 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:50,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:50,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1221484355, now seen corresponding path program 1 times [2020-12-23 09:31:50,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:50,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910803510] [2020-12-23 09:31:50,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 09:31:50,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910803510] [2020-12-23 09:31:50,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:50,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:50,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430060821] [2020-12-23 09:31:50,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:50,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:50,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:50,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:50,367 INFO L87 Difference]: Start difference. First operand 11400 states and 13855 transitions. Second operand 3 states. [2020-12-23 09:31:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:51,221 INFO L93 Difference]: Finished difference Result 22572 states and 27451 transitions. [2020-12-23 09:31:51,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:51,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-12-23 09:31:51,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:51,243 INFO L225 Difference]: With dead ends: 22572 [2020-12-23 09:31:51,244 INFO L226 Difference]: Without dead ends: 11290 [2020-12-23 09:31:51,257 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 [2020-12-23 09:31:51,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11290 states. [2020-12-23 09:31:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11290 to 11290. [2020-12-23 09:31:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11290 states. [2020-12-23 09:31:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11290 states to 11290 states and 13729 transitions. [2020-12-23 09:31:52,174 INFO L78 Accepts]: Start accepts. Automaton has 11290 states and 13729 transitions. Word has length 89 [2020-12-23 09:31:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:52,174 INFO L481 AbstractCegarLoop]: Abstraction has 11290 states and 13729 transitions. [2020-12-23 09:31:52,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 11290 states and 13729 transitions. [2020-12-23 09:31:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 09:31:52,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:52,178 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-23 09:31:52,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-23 09:31:52,178 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:52,179 INFO L82 PathProgramCache]: Analyzing trace with hash 965025050, now seen corresponding path program 1 times [2020-12-23 09:31:52,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:52,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120816999] [2020-12-23 09:31:52,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:31:52,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120816999] [2020-12-23 09:31:52,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:52,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:52,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472534135] [2020-12-23 09:31:52,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:52,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:52,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:52,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:52,228 INFO L87 Difference]: Start difference. First operand 11290 states and 13729 transitions. Second operand 3 states. [2020-12-23 09:31:53,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:53,775 INFO L93 Difference]: Finished difference Result 31756 states and 38669 transitions. [2020-12-23 09:31:53,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:53,776 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-12-23 09:31:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:53,807 INFO L225 Difference]: With dead ends: 31756 [2020-12-23 09:31:53,808 INFO L226 Difference]: Without dead ends: 20584 [2020-12-23 09:31:53,824 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 [2020-12-23 09:31:53,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20584 states. [2020-12-23 09:31:55,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20584 to 20580. [2020-12-23 09:31:55,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20580 states. [2020-12-23 09:31:55,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20580 states to 20580 states and 25005 transitions. [2020-12-23 09:31:55,342 INFO L78 Accepts]: Start accepts. Automaton has 20580 states and 25005 transitions. Word has length 90 [2020-12-23 09:31:55,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:55,342 INFO L481 AbstractCegarLoop]: Abstraction has 20580 states and 25005 transitions. [2020-12-23 09:31:55,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:55,342 INFO L276 IsEmpty]: Start isEmpty. Operand 20580 states and 25005 transitions. [2020-12-23 09:31:55,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 09:31:55,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:55,355 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-23 09:31:55,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-23 09:31:55,355 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:55,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:55,355 INFO L82 PathProgramCache]: Analyzing trace with hash -914105896, now seen corresponding path program 1 times [2020-12-23 09:31:55,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:55,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202636507] [2020-12-23 09:31:55,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 09:31:55,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202636507] [2020-12-23 09:31:55,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:55,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:55,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550171332] [2020-12-23 09:31:55,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:55,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:55,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:55,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:55,381 INFO L87 Difference]: Start difference. First operand 20580 states and 25005 transitions. Second operand 3 states. [2020-12-23 09:31:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:56,661 INFO L93 Difference]: Finished difference Result 40934 states and 49757 transitions. [2020-12-23 09:31:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:56,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2020-12-23 09:31:56,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:56,690 INFO L225 Difference]: With dead ends: 40934 [2020-12-23 09:31:56,690 INFO L226 Difference]: Without dead ends: 20472 [2020-12-23 09:31:56,713 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 [2020-12-23 09:31:56,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20472 states. [2020-12-23 09:31:58,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20472 to 20472. [2020-12-23 09:31:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20472 states. [2020-12-23 09:31:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20472 states to 20472 states and 24883 transitions. [2020-12-23 09:31:58,527 INFO L78 Accepts]: Start accepts. Automaton has 20472 states and 24883 transitions. Word has length 90 [2020-12-23 09:31:58,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:58,527 INFO L481 AbstractCegarLoop]: Abstraction has 20472 states and 24883 transitions. [2020-12-23 09:31:58,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:58,528 INFO L276 IsEmpty]: Start isEmpty. Operand 20472 states and 24883 transitions. [2020-12-23 09:31:58,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-23 09:31:58,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:58,531 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:58,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-23 09:31:58,532 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:58,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:58,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1266963889, now seen corresponding path program 1 times [2020-12-23 09:31:58,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:58,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596459580] [2020-12-23 09:31:58,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:58,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 09:31:58,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596459580] [2020-12-23 09:31:58,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:58,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:31:58,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989038385] [2020-12-23 09:31:58,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:58,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:58,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:58,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:58,587 INFO L87 Difference]: Start difference. First operand 20472 states and 24883 transitions. Second operand 3 states. [2020-12-23 09:32:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:01,034 INFO L93 Difference]: Finished difference Result 49428 states and 60301 transitions. [2020-12-23 09:32:01,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:32:01,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-23 09:32:01,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:01,071 INFO L225 Difference]: With dead ends: 49428 [2020-12-23 09:32:01,071 INFO L226 Difference]: Without dead ends: 34620 [2020-12-23 09:32:01,088 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 [2020-12-23 09:32:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34620 states. [2020-12-23 09:32:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34620 to 27842. [2020-12-23 09:32:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27842 states. [2020-12-23 09:32:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27842 states to 27842 states and 33821 transitions. [2020-12-23 09:32:03,366 INFO L78 Accepts]: Start accepts. Automaton has 27842 states and 33821 transitions. Word has length 91 [2020-12-23 09:32:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:03,366 INFO L481 AbstractCegarLoop]: Abstraction has 27842 states and 33821 transitions. [2020-12-23 09:32:03,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:32:03,367 INFO L276 IsEmpty]: Start isEmpty. Operand 27842 states and 33821 transitions. [2020-12-23 09:32:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 09:32:03,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:03,377 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:03,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-23 09:32:03,377 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:03,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:03,377 INFO L82 PathProgramCache]: Analyzing trace with hash 751901331, now seen corresponding path program 1 times [2020-12-23 09:32:03,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:03,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335679700] [2020-12-23 09:32:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:32:03,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335679700] [2020-12-23 09:32:03,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:03,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:03,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153022269] [2020-12-23 09:32:03,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:32:03,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:03,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:32:03,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:32:03,435 INFO L87 Difference]: Start difference. First operand 27842 states and 33821 transitions. Second operand 4 states. [2020-12-23 09:32:08,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:08,167 INFO L93 Difference]: Finished difference Result 88574 states and 107581 transitions. [2020-12-23 09:32:08,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:32:08,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 120 [2020-12-23 09:32:08,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:08,240 INFO L225 Difference]: With dead ends: 88574 [2020-12-23 09:32:08,241 INFO L226 Difference]: Without dead ends: 60780 [2020-12-23 09:32:08,269 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 [2020-12-23 09:32:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60780 states. [2020-12-23 09:32:12,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60780 to 52392. [2020-12-23 09:32:12,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52392 states. [2020-12-23 09:32:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52392 states to 52392 states and 63345 transitions. [2020-12-23 09:32:12,501 INFO L78 Accepts]: Start accepts. Automaton has 52392 states and 63345 transitions. Word has length 120 [2020-12-23 09:32:12,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:12,502 INFO L481 AbstractCegarLoop]: Abstraction has 52392 states and 63345 transitions. [2020-12-23 09:32:12,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:32:12,502 INFO L276 IsEmpty]: Start isEmpty. Operand 52392 states and 63345 transitions. [2020-12-23 09:32:12,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 09:32:12,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:12,518 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:12,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-23 09:32:12,518 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:12,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:12,518 INFO L82 PathProgramCache]: Analyzing trace with hash 805064470, now seen corresponding path program 1 times [2020-12-23 09:32:12,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:12,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740076339] [2020-12-23 09:32:12,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:12,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:32:12,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740076339] [2020-12-23 09:32:12,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:12,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:12,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336977236] [2020-12-23 09:32:12,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:32:12,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:12,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:32:12,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:32:12,575 INFO L87 Difference]: Start difference. First operand 52392 states and 63345 transitions. Second operand 3 states. [2020-12-23 09:32:19,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:19,712 INFO L93 Difference]: Finished difference Result 151352 states and 182661 transitions. [2020-12-23 09:32:19,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:32:19,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-23 09:32:19,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:20,000 INFO L225 Difference]: With dead ends: 151352 [2020-12-23 09:32:20,000 INFO L226 Difference]: Without dead ends: 99076 [2020-12-23 09:32:20,057 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 [2020-12-23 09:32:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99076 states. [2020-12-23 09:32:27,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99076 to 98688. [2020-12-23 09:32:27,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98688 states. [2020-12-23 09:32:27,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98688 states to 98688 states and 118753 transitions. [2020-12-23 09:32:27,841 INFO L78 Accepts]: Start accepts. Automaton has 98688 states and 118753 transitions. Word has length 120 [2020-12-23 09:32:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:27,841 INFO L481 AbstractCegarLoop]: Abstraction has 98688 states and 118753 transitions. [2020-12-23 09:32:27,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:32:27,842 INFO L276 IsEmpty]: Start isEmpty. Operand 98688 states and 118753 transitions. [2020-12-23 09:32:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 09:32:27,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:27,861 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:27,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-23 09:32:27,861 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:27,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:27,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1762757864, now seen corresponding path program 1 times [2020-12-23 09:32:27,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:27,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015617871] [2020-12-23 09:32:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 09:32:27,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015617871] [2020-12-23 09:32:27,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:27,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:27,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947730967] [2020-12-23 09:32:27,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:32:27,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:27,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:32:27,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:32:27,892 INFO L87 Difference]: Start difference. First operand 98688 states and 118753 transitions. Second operand 3 states. [2020-12-23 09:32:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:35,516 INFO L93 Difference]: Finished difference Result 197156 states and 237267 transitions. [2020-12-23 09:32:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:32:35,518 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-23 09:32:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:35,643 INFO L225 Difference]: With dead ends: 197156 [2020-12-23 09:32:35,643 INFO L226 Difference]: Without dead ends: 98584 [2020-12-23 09:32:35,706 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 [2020-12-23 09:32:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98584 states. [2020-12-23 09:32:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98584 to 98584. [2020-12-23 09:32:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98584 states. [2020-12-23 09:32:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98584 states to 98584 states and 118639 transitions. [2020-12-23 09:32:43,468 INFO L78 Accepts]: Start accepts. Automaton has 98584 states and 118639 transitions. Word has length 120 [2020-12-23 09:32:43,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:43,468 INFO L481 AbstractCegarLoop]: Abstraction has 98584 states and 118639 transitions. [2020-12-23 09:32:43,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:32:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 98584 states and 118639 transitions. [2020-12-23 09:32:43,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-23 09:32:43,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:43,484 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:43,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-23 09:32:43,484 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:43,484 INFO L82 PathProgramCache]: Analyzing trace with hash -209027543, now seen corresponding path program 1 times [2020-12-23 09:32:43,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:43,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114745499] [2020-12-23 09:32:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:32:43,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114745499] [2020-12-23 09:32:43,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:43,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 09:32:43,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756696700] [2020-12-23 09:32:43,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:32:43,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:43,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:32:43,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:32:43,533 INFO L87 Difference]: Start difference. First operand 98584 states and 118639 transitions. Second operand 4 states. [2020-12-23 09:32:51,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:51,116 INFO L93 Difference]: Finished difference Result 174016 states and 209403 transitions. [2020-12-23 09:32:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:32:51,116 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 121 [2020-12-23 09:32:51,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:51,197 INFO L225 Difference]: With dead ends: 174016 [2020-12-23 09:32:51,198 INFO L226 Difference]: Without dead ends: 75492 [2020-12-23 09:32:51,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:32:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75492 states. [2020-12-23 09:32:56,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75492 to 75488. [2020-12-23 09:32:56,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75488 states. [2020-12-23 09:32:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75488 states to 75488 states and 90314 transitions. [2020-12-23 09:32:57,028 INFO L78 Accepts]: Start accepts. Automaton has 75488 states and 90314 transitions. Word has length 121 [2020-12-23 09:32:57,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:57,029 INFO L481 AbstractCegarLoop]: Abstraction has 75488 states and 90314 transitions. [2020-12-23 09:32:57,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:32:57,029 INFO L276 IsEmpty]: Start isEmpty. Operand 75488 states and 90314 transitions. [2020-12-23 09:32:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-23 09:32:57,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:57,061 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-12-23 09:32:57,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-23 09:32:57,061 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:57,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:57,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2110558493, now seen corresponding path program 1 times [2020-12-23 09:32:57,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:57,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008574189] [2020-12-23 09:32:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:57,142 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:32:57,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008574189] [2020-12-23 09:32:57,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:57,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 09:32:57,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439911694] [2020-12-23 09:32:57,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:32:57,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:57,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:32:57,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:32:57,144 INFO L87 Difference]: Start difference. First operand 75488 states and 90314 transitions. Second operand 4 states. [2020-12-23 09:33:03,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:33:03,124 INFO L93 Difference]: Finished difference Result 151216 states and 180858 transitions. [2020-12-23 09:33:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:33:03,124 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2020-12-23 09:33:03,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:33:03,206 INFO L225 Difference]: With dead ends: 151216 [2020-12-23 09:33:03,206 INFO L226 Difference]: Without dead ends: 64096 [2020-12-23 09:33:03,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:33:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64096 states. [2020-12-23 09:33:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64096 to 63548. [2020-12-23 09:33:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63548 states. [2020-12-23 09:33:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63548 states to 63548 states and 75893 transitions. [2020-12-23 09:33:08,114 INFO L78 Accepts]: Start accepts. Automaton has 63548 states and 75893 transitions. Word has length 175 [2020-12-23 09:33:08,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:33:08,114 INFO L481 AbstractCegarLoop]: Abstraction has 63548 states and 75893 transitions. [2020-12-23 09:33:08,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:33:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 63548 states and 75893 transitions. [2020-12-23 09:33:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-12-23 09:33:08,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:33:08,283 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-12-23 09:33:08,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-23 09:33:08,284 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:33:08,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:33:08,284 INFO L82 PathProgramCache]: Analyzing trace with hash -224407011, now seen corresponding path program 1 times [2020-12-23 09:33:08,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:33:08,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825069026] [2020-12-23 09:33:08,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:33:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:33:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 09:33:08,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825069026] [2020-12-23 09:33:08,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:33:08,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:33:08,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120245393] [2020-12-23 09:33:08,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:33:08,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:33:08,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:33:08,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:33:08,395 INFO L87 Difference]: Start difference. First operand 63548 states and 75893 transitions. Second operand 4 states. [2020-12-23 09:33:13,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:33:13,994 INFO L93 Difference]: Finished difference Result 134432 states and 160018 transitions. [2020-12-23 09:33:13,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:33:13,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2020-12-23 09:33:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:33:14,077 INFO L225 Difference]: With dead ends: 134432 [2020-12-23 09:33:14,077 INFO L226 Difference]: Without dead ends: 70944 [2020-12-23 09:33:14,120 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 [2020-12-23 09:33:14,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70944 states. [2020-12-23 09:33:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70944 to 61772. [2020-12-23 09:33:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61772 states. [2020-12-23 09:33:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61772 states to 61772 states and 72292 transitions. [2020-12-23 09:33:18,921 INFO L78 Accepts]: Start accepts. Automaton has 61772 states and 72292 transitions. Word has length 175 [2020-12-23 09:33:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:33:18,922 INFO L481 AbstractCegarLoop]: Abstraction has 61772 states and 72292 transitions. [2020-12-23 09:33:18,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:33:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 61772 states and 72292 transitions. [2020-12-23 09:33:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-23 09:33:18,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:33:18,945 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:33:18,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-23 09:33:18,945 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:33:18,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:33:18,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1974744232, now seen corresponding path program 1 times [2020-12-23 09:33:18,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:33:18,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54249253] [2020-12-23 09:33:18,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:33:18,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:33:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 09:33:19,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54249253] [2020-12-23 09:33:19,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:33:19,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:33:19,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393814892] [2020-12-23 09:33:19,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:33:19,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:33:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:33:19,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:33:19,036 INFO L87 Difference]: Start difference. First operand 61772 states and 72292 transitions. Second operand 3 states. [2020-12-23 09:33:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:33:24,629 INFO L93 Difference]: Finished difference Result 134232 states and 156806 transitions. [2020-12-23 09:33:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:33:24,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2020-12-23 09:33:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:33:24,712 INFO L225 Difference]: With dead ends: 134232 [2020-12-23 09:33:24,713 INFO L226 Difference]: Without dead ends: 72499 [2020-12-23 09:33:24,750 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 [2020-12-23 09:33:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72499 states.