/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.05.cil-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:31:42,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:31:42,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:31:42,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:31:42,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:31:42,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:31:42,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:31:42,734 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:31:42,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:31:42,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:31:42,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:31:42,751 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:31:42,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:31:42,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:31:42,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:31:42,760 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:31:42,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:31:42,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:31:42,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:31:42,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:31:42,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:31:42,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:31:42,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:31:42,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:31:42,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:31:42,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:31:42,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:31:42,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:31:42,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:31:42,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:31:42,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:31:42,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:31:42,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:31:42,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:31:42,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:31:42,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:31:42,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:31:42,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:31:42,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:31:42,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:31:42,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:31:42,825 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 09:31:42,872 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:31:42,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:31:42,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:31:42,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:31:42,877 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:31:42,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:31:42,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:31:42,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:31:42,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:31:42,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:31:42,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:31:42,880 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:31:42,880 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:31:42,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:31:42,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:31:42,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:31:42,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:31:42,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:31:42,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:31:42,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:31:42,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:31:42,882 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:31:42,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:31:42,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:31:42,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:31:42,883 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:31:43,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:31:43,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:31:43,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:31:43,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:31:43,391 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:31:43,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.05.cil-1.c [2020-12-23 09:31:43,483 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5c6f7c0c7/f7e231f3668d49a1b1cec655182599d5/FLAG7e3940837 [2020-12-23 09:31:44,183 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:31:44,184 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.05.cil-1.c [2020-12-23 09:31:44,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5c6f7c0c7/f7e231f3668d49a1b1cec655182599d5/FLAG7e3940837 [2020-12-23 09:31:44,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5c6f7c0c7/f7e231f3668d49a1b1cec655182599d5 [2020-12-23 09:31:44,519 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:31:44,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:31:44,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:31:44,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:31:44,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:31:44,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:31:44" (1/1) ... [2020-12-23 09:31:44,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419b9548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:44, skipping insertion in model container [2020-12-23 09:31:44,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:31:44" (1/1) ... [2020-12-23 09:31:44,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:31:44,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:31:44,796 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.05.cil-1.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_5~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_5~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t5_pc~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t5_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[~__retres1~5,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~5,] 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[~t5_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t5_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] 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[~tmp_ndt_6~0,] left hand side expression in assignment: lhs: VariableLHS[~t5_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[~T5_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[~E_5~0,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[~T5_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[~E_5~0,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[~tmp___4~0,] left hand side expression in assignment: lhs: VariableLHS[~t5_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[~T5_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[~E_5~0,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[~t5_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[~__retres1~7,] [2020-12-23 09:31:44,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:31:44,951 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:31:44,973 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.05.cil-1.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_5~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~E_5~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t5_pc~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t5_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[~__retres1~5,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~5,] 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[~t5_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t5_st~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] left hand side expression in assignment: lhs: VariableLHS[~__retres1~6,] 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[~tmp_ndt_6~0,] left hand side expression in assignment: lhs: VariableLHS[~t5_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[~T5_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[~E_5~0,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[~T5_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[~E_5~0,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[~tmp___4~0,] left hand side expression in assignment: lhs: VariableLHS[~t5_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[~T5_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[~E_5~0,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[~t5_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[~__retres1~7,] [2020-12-23 09:31:45,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:31:45,095 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:31:45,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:45 WrapperNode [2020-12-23 09:31:45,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:31:45,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:31:45,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:31:45,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:31:45,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:45" (1/1) ... [2020-12-23 09:31:45,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:45" (1/1) ... [2020-12-23 09:31:45,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:31:45,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:31:45,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:31:45,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:31:45,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:45" (1/1) ... [2020-12-23 09:31:45,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:45" (1/1) ... [2020-12-23 09:31:45,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:45" (1/1) ... [2020-12-23 09:31:45,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:45" (1/1) ... [2020-12-23 09:31:45,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:45" (1/1) ... [2020-12-23 09:31:45,327 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:45" (1/1) ... [2020-12-23 09:31:45,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:45" (1/1) ... [2020-12-23 09:31:45,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:31:45,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:31:45,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:31:45,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:31:45,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:45" (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 09:31:45,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:31:45,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:31:45,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:31:45,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:31:47,065 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:31:47,066 INFO L299 CfgBuilder]: Removed 196 assume(true) statements. [2020-12-23 09:31:47,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:31:47 BoogieIcfgContainer [2020-12-23 09:31:47,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:31:47,071 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:31:47,071 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:31:47,075 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:31:47,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:31:44" (1/3) ... [2020-12-23 09:31:47,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c18c0d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:31:47, skipping insertion in model container [2020-12-23 09:31:47,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:31:45" (2/3) ... [2020-12-23 09:31:47,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c18c0d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:31:47, skipping insertion in model container [2020-12-23 09:31:47,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:31:47" (3/3) ... [2020-12-23 09:31:47,079 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.05.cil-1.c [2020-12-23 09:31:47,086 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:31:47,092 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:31:47,112 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:31:47,146 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:31:47,146 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:31:47,147 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:31:47,147 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:31:47,147 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:31:47,147 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:31:47,147 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:31:47,147 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:31:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states. [2020-12-23 09:31:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:31:47,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:47,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:47,196 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:47,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:47,202 INFO L82 PathProgramCache]: Analyzing trace with hash -967631064, now seen corresponding path program 1 times [2020-12-23 09:31:47,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:47,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904986997] [2020-12-23 09:31:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:47,508 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 09:31:47,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904986997] [2020-12-23 09:31:47,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:47,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:47,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571210169] [2020-12-23 09:31:47,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:47,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:47,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:47,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:47,538 INFO L87 Difference]: Start difference. First operand 533 states. Second operand 3 states. [2020-12-23 09:31:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:47,657 INFO L93 Difference]: Finished difference Result 1061 states and 1639 transitions. [2020-12-23 09:31:47,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:47,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-23 09:31:47,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:47,692 INFO L225 Difference]: With dead ends: 1061 [2020-12-23 09:31:47,697 INFO L226 Difference]: Without dead ends: 529 [2020-12-23 09:31:47,709 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 09:31:47,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-12-23 09:31:47,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2020-12-23 09:31:47,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 529 states. [2020-12-23 09:31:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 801 transitions. [2020-12-23 09:31:47,857 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 801 transitions. Word has length 83 [2020-12-23 09:31:47,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:47,859 INFO L481 AbstractCegarLoop]: Abstraction has 529 states and 801 transitions. [2020-12-23 09:31:47,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 801 transitions. [2020-12-23 09:31:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:31:47,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:47,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:47,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:31:47,872 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:47,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:47,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1207870810, now seen corresponding path program 1 times [2020-12-23 09:31:47,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:47,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108610856] [2020-12-23 09:31:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:48,030 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 09:31:48,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108610856] [2020-12-23 09:31:48,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:48,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:31:48,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715767051] [2020-12-23 09:31:48,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:48,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:48,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:48,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:48,037 INFO L87 Difference]: Start difference. First operand 529 states and 801 transitions. Second operand 3 states. [2020-12-23 09:31:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:48,138 INFO L93 Difference]: Finished difference Result 1459 states and 2203 transitions. [2020-12-23 09:31:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:48,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-23 09:31:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:48,148 INFO L225 Difference]: With dead ends: 1459 [2020-12-23 09:31:48,148 INFO L226 Difference]: Without dead ends: 940 [2020-12-23 09:31:48,155 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 09:31:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2020-12-23 09:31:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 938. [2020-12-23 09:31:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-23 09:31:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1413 transitions. [2020-12-23 09:31:48,237 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1413 transitions. Word has length 83 [2020-12-23 09:31:48,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:48,238 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1413 transitions. [2020-12-23 09:31:48,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:48,239 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1413 transitions. [2020-12-23 09:31:48,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:31:48,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:48,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:48,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:31:48,247 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:48,252 INFO L82 PathProgramCache]: Analyzing trace with hash -258608350, now seen corresponding path program 1 times [2020-12-23 09:31:48,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:48,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126311231] [2020-12-23 09:31:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:48,428 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 09:31:48,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126311231] [2020-12-23 09:31:48,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:48,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:48,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055940752] [2020-12-23 09:31:48,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:48,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:48,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:48,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:48,431 INFO L87 Difference]: Start difference. First operand 938 states and 1413 transitions. Second operand 4 states. [2020-12-23 09:31:48,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:48,556 INFO L93 Difference]: Finished difference Result 2275 states and 3422 transitions. [2020-12-23 09:31:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:48,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-23 09:31:48,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:48,567 INFO L225 Difference]: With dead ends: 2275 [2020-12-23 09:31:48,567 INFO L226 Difference]: Without dead ends: 1348 [2020-12-23 09:31:48,570 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 09:31:48,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2020-12-23 09:31:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 938. [2020-12-23 09:31:48,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-23 09:31:48,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1410 transitions. [2020-12-23 09:31:48,629 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1410 transitions. Word has length 83 [2020-12-23 09:31:48,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:48,629 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1410 transitions. [2020-12-23 09:31:48,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:31:48,630 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1410 transitions. [2020-12-23 09:31:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:31:48,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:48,631 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:48,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 09:31:48,631 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:48,632 INFO L82 PathProgramCache]: Analyzing trace with hash 2125316388, now seen corresponding path program 1 times [2020-12-23 09:31:48,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:48,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180957864] [2020-12-23 09:31:48,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:48,692 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 09:31:48,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180957864] [2020-12-23 09:31:48,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:48,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:48,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308054966] [2020-12-23 09:31:48,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:48,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:48,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:48,695 INFO L87 Difference]: Start difference. First operand 938 states and 1410 transitions. Second operand 4 states. [2020-12-23 09:31:48,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:48,828 INFO L93 Difference]: Finished difference Result 2273 states and 3412 transitions. [2020-12-23 09:31:48,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:48,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-23 09:31:48,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:48,837 INFO L225 Difference]: With dead ends: 2273 [2020-12-23 09:31:48,837 INFO L226 Difference]: Without dead ends: 1347 [2020-12-23 09:31:48,839 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 09:31:48,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2020-12-23 09:31:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 938. [2020-12-23 09:31:48,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-23 09:31:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1407 transitions. [2020-12-23 09:31:48,927 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1407 transitions. Word has length 83 [2020-12-23 09:31:48,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:48,928 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1407 transitions. [2020-12-23 09:31:48,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:31:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1407 transitions. [2020-12-23 09:31:48,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:31:48,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:48,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:48,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 09:31:48,931 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:48,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:48,932 INFO L82 PathProgramCache]: Analyzing trace with hash -2092750110, now seen corresponding path program 1 times [2020-12-23 09:31:48,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:48,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611973807] [2020-12-23 09:31:48,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:49,044 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 09:31:49,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611973807] [2020-12-23 09:31:49,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:49,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:31:49,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477182128] [2020-12-23 09:31:49,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:49,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:49,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:49,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:49,049 INFO L87 Difference]: Start difference. First operand 938 states and 1407 transitions. Second operand 3 states. [2020-12-23 09:31:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:49,125 INFO L93 Difference]: Finished difference Result 1862 states and 2793 transitions. [2020-12-23 09:31:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:49,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-23 09:31:49,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:49,133 INFO L225 Difference]: With dead ends: 1862 [2020-12-23 09:31:49,134 INFO L226 Difference]: Without dead ends: 938 [2020-12-23 09:31:49,136 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 09:31:49,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2020-12-23 09:31:49,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 938. [2020-12-23 09:31:49,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-23 09:31:49,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1399 transitions. [2020-12-23 09:31:49,200 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1399 transitions. Word has length 83 [2020-12-23 09:31:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:49,201 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1399 transitions. [2020-12-23 09:31:49,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:49,201 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1399 transitions. [2020-12-23 09:31:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:31:49,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:49,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:49,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 09:31:49,203 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:49,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:49,204 INFO L82 PathProgramCache]: Analyzing trace with hash 34562398, now seen corresponding path program 1 times [2020-12-23 09:31:49,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:49,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403071723] [2020-12-23 09:31:49,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:49,303 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 09:31:49,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403071723] [2020-12-23 09:31:49,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:49,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:31:49,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880035250] [2020-12-23 09:31:49,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:49,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:49,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:49,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:49,306 INFO L87 Difference]: Start difference. First operand 938 states and 1399 transitions. Second operand 3 states. [2020-12-23 09:31:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:49,390 INFO L93 Difference]: Finished difference Result 1861 states and 2776 transitions. [2020-12-23 09:31:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:49,391 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-23 09:31:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:49,397 INFO L225 Difference]: With dead ends: 1861 [2020-12-23 09:31:49,397 INFO L226 Difference]: Without dead ends: 938 [2020-12-23 09:31:49,399 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 09:31:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2020-12-23 09:31:49,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 938. [2020-12-23 09:31:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-23 09:31:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1391 transitions. [2020-12-23 09:31:49,469 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1391 transitions. Word has length 83 [2020-12-23 09:31:49,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:49,469 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1391 transitions. [2020-12-23 09:31:49,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:49,470 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1391 transitions. [2020-12-23 09:31:49,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:31:49,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:49,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:49,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 09:31:49,472 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:49,472 INFO L82 PathProgramCache]: Analyzing trace with hash -458063776, now seen corresponding path program 1 times [2020-12-23 09:31:49,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:49,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551434349] [2020-12-23 09:31:49,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:49,578 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 09:31:49,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551434349] [2020-12-23 09:31:49,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:49,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:49,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082805752] [2020-12-23 09:31:49,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:49,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:49,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:49,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:49,582 INFO L87 Difference]: Start difference. First operand 938 states and 1391 transitions. Second operand 4 states. [2020-12-23 09:31:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:49,784 INFO L93 Difference]: Finished difference Result 2223 states and 3296 transitions. [2020-12-23 09:31:49,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:49,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-23 09:31:49,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:49,792 INFO L225 Difference]: With dead ends: 2223 [2020-12-23 09:31:49,792 INFO L226 Difference]: Without dead ends: 1301 [2020-12-23 09:31:49,797 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 09:31:49,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2020-12-23 09:31:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 938. [2020-12-23 09:31:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-23 09:31:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1388 transitions. [2020-12-23 09:31:49,860 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1388 transitions. Word has length 83 [2020-12-23 09:31:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:49,860 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1388 transitions. [2020-12-23 09:31:49,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:31:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1388 transitions. [2020-12-23 09:31:49,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:31:49,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:49,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:49,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 09:31:49,862 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:49,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:49,862 INFO L82 PathProgramCache]: Analyzing trace with hash 495876382, now seen corresponding path program 1 times [2020-12-23 09:31:49,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:49,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067617869] [2020-12-23 09:31:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:49,920 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 09:31:49,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067617869] [2020-12-23 09:31:49,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:49,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:49,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505939872] [2020-12-23 09:31:49,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:49,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:49,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:49,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:49,923 INFO L87 Difference]: Start difference. First operand 938 states and 1388 transitions. Second operand 4 states. [2020-12-23 09:31:50,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:50,158 INFO L93 Difference]: Finished difference Result 2221 states and 3286 transitions. [2020-12-23 09:31:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:50,159 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-23 09:31:50,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:50,166 INFO L225 Difference]: With dead ends: 2221 [2020-12-23 09:31:50,167 INFO L226 Difference]: Without dead ends: 1300 [2020-12-23 09:31:50,169 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 09:31:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2020-12-23 09:31:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 938. [2020-12-23 09:31:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-23 09:31:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1385 transitions. [2020-12-23 09:31:50,252 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1385 transitions. Word has length 83 [2020-12-23 09:31:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:50,253 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1385 transitions. [2020-12-23 09:31:50,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:31:50,253 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1385 transitions. [2020-12-23 09:31:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:31:50,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:50,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:50,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 09:31:50,255 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:50,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:50,255 INFO L82 PathProgramCache]: Analyzing trace with hash -720277344, now seen corresponding path program 1 times [2020-12-23 09:31:50,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:50,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695247473] [2020-12-23 09:31:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:50,318 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 09:31:50,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695247473] [2020-12-23 09:31:50,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:50,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:31:50,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155932948] [2020-12-23 09:31:50,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:50,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:50,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:50,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:50,327 INFO L87 Difference]: Start difference. First operand 938 states and 1385 transitions. Second operand 3 states. [2020-12-23 09:31:50,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:50,454 INFO L93 Difference]: Finished difference Result 1858 states and 2745 transitions. [2020-12-23 09:31:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:50,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-23 09:31:50,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:50,460 INFO L225 Difference]: With dead ends: 1858 [2020-12-23 09:31:50,460 INFO L226 Difference]: Without dead ends: 938 [2020-12-23 09:31:50,462 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 09:31:50,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2020-12-23 09:31:50,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 938. [2020-12-23 09:31:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-23 09:31:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1363 transitions. [2020-12-23 09:31:50,535 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1363 transitions. Word has length 83 [2020-12-23 09:31:50,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:50,540 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1363 transitions. [2020-12-23 09:31:50,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:50,540 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1363 transitions. [2020-12-23 09:31:50,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:31:50,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:50,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:50,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 09:31:50,542 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:50,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1978186147, now seen corresponding path program 1 times [2020-12-23 09:31:50,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:50,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432811927] [2020-12-23 09:31:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:50,599 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 09:31:50,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432811927] [2020-12-23 09:31:50,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:50,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:50,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426832794] [2020-12-23 09:31:50,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:50,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:50,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:50,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:50,606 INFO L87 Difference]: Start difference. First operand 938 states and 1363 transitions. Second operand 4 states. [2020-12-23 09:31:50,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:50,875 INFO L93 Difference]: Finished difference Result 2217 states and 3222 transitions. [2020-12-23 09:31:50,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:50,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-23 09:31:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:50,882 INFO L225 Difference]: With dead ends: 2217 [2020-12-23 09:31:50,883 INFO L226 Difference]: Without dead ends: 1298 [2020-12-23 09:31:50,885 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 09:31:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2020-12-23 09:31:50,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 938. [2020-12-23 09:31:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-23 09:31:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1360 transitions. [2020-12-23 09:31:50,956 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1360 transitions. Word has length 83 [2020-12-23 09:31:50,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:50,956 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1360 transitions. [2020-12-23 09:31:50,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:31:50,957 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1360 transitions. [2020-12-23 09:31:50,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:31:50,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:50,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:50,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 09:31:50,958 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:50,959 INFO L82 PathProgramCache]: Analyzing trace with hash 630601311, now seen corresponding path program 1 times [2020-12-23 09:31:50,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:50,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962754080] [2020-12-23 09:31:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:50,999 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 09:31:51,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962754080] [2020-12-23 09:31:51,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:51,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:51,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831880137] [2020-12-23 09:31:51,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:51,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:51,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:51,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:51,002 INFO L87 Difference]: Start difference. First operand 938 states and 1360 transitions. Second operand 4 states. [2020-12-23 09:31:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:51,210 INFO L93 Difference]: Finished difference Result 2215 states and 3212 transitions. [2020-12-23 09:31:51,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:51,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-12-23 09:31:51,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:51,219 INFO L225 Difference]: With dead ends: 2215 [2020-12-23 09:31:51,219 INFO L226 Difference]: Without dead ends: 1297 [2020-12-23 09:31:51,222 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 09:31:51,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2020-12-23 09:31:51,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 938. [2020-12-23 09:31:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-12-23 09:31:51,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1357 transitions. [2020-12-23 09:31:51,305 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1357 transitions. Word has length 83 [2020-12-23 09:31:51,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:51,306 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 1357 transitions. [2020-12-23 09:31:51,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:31:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1357 transitions. [2020-12-23 09:31:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:31:51,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:51,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:51,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 09:31:51,308 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:51,309 INFO L82 PathProgramCache]: Analyzing trace with hash 576208413, now seen corresponding path program 1 times [2020-12-23 09:31:51,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:51,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132917107] [2020-12-23 09:31:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:51,347 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 09:31:51,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132917107] [2020-12-23 09:31:51,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:51,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:31:51,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621936095] [2020-12-23 09:31:51,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:31:51,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:51,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:31:51,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:31:51,350 INFO L87 Difference]: Start difference. First operand 938 states and 1357 transitions. Second operand 3 states. [2020-12-23 09:31:51,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:51,567 INFO L93 Difference]: Finished difference Result 2694 states and 3892 transitions. [2020-12-23 09:31:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:31:51,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-23 09:31:51,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:51,578 INFO L225 Difference]: With dead ends: 2694 [2020-12-23 09:31:51,578 INFO L226 Difference]: Without dead ends: 1779 [2020-12-23 09:31:51,581 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 09:31:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2020-12-23 09:31:51,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1699. [2020-12-23 09:31:51,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1699 states. [2020-12-23 09:31:51,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 2438 transitions. [2020-12-23 09:31:51,720 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 2438 transitions. Word has length 83 [2020-12-23 09:31:51,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:51,720 INFO L481 AbstractCegarLoop]: Abstraction has 1699 states and 2438 transitions. [2020-12-23 09:31:51,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:31:51,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 2438 transitions. [2020-12-23 09:31:51,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:31:51,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:51,723 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:51,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 09:31:51,724 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:51,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:51,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1635851910, now seen corresponding path program 1 times [2020-12-23 09:31:51,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:51,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528884368] [2020-12-23 09:31:51,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:51,787 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 09:31:51,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528884368] [2020-12-23 09:31:51,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:51,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:31:51,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470455164] [2020-12-23 09:31:51,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:31:51,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:51,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:31:51,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:31:51,790 INFO L87 Difference]: Start difference. First operand 1699 states and 2438 transitions. Second operand 5 states. [2020-12-23 09:31:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:52,273 INFO L93 Difference]: Finished difference Result 4970 states and 7139 transitions. [2020-12-23 09:31:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:31:52,273 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-23 09:31:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:52,291 INFO L225 Difference]: With dead ends: 4970 [2020-12-23 09:31:52,292 INFO L226 Difference]: Without dead ends: 3298 [2020-12-23 09:31:52,296 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 09:31:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3298 states. [2020-12-23 09:31:52,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3298 to 1744. [2020-12-23 09:31:52,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1744 states. [2020-12-23 09:31:52,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1744 states to 1744 states and 2469 transitions. [2020-12-23 09:31:52,479 INFO L78 Accepts]: Start accepts. Automaton has 1744 states and 2469 transitions. Word has length 135 [2020-12-23 09:31:52,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:52,479 INFO L481 AbstractCegarLoop]: Abstraction has 1744 states and 2469 transitions. [2020-12-23 09:31:52,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:31:52,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1744 states and 2469 transitions. [2020-12-23 09:31:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:31:52,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:52,520 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:52,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 09:31:52,521 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:52,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:52,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1605012094, now seen corresponding path program 1 times [2020-12-23 09:31:52,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:52,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823781344] [2020-12-23 09:31:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:52,600 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 09:31:52,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823781344] [2020-12-23 09:31:52,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:52,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:31:52,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98385274] [2020-12-23 09:31:52,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:31:52,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:52,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:31:52,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:31:52,603 INFO L87 Difference]: Start difference. First operand 1744 states and 2469 transitions. Second operand 5 states. [2020-12-23 09:31:52,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:52,969 INFO L93 Difference]: Finished difference Result 4571 states and 6467 transitions. [2020-12-23 09:31:52,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:31:52,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-23 09:31:52,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:52,985 INFO L225 Difference]: With dead ends: 4571 [2020-12-23 09:31:52,985 INFO L226 Difference]: Without dead ends: 2868 [2020-12-23 09:31:52,990 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 09:31:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2868 states. [2020-12-23 09:31:53,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2868 to 1756. [2020-12-23 09:31:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1756 states. [2020-12-23 09:31:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 2456 transitions. [2020-12-23 09:31:53,207 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 2456 transitions. Word has length 135 [2020-12-23 09:31:53,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:53,207 INFO L481 AbstractCegarLoop]: Abstraction has 1756 states and 2456 transitions. [2020-12-23 09:31:53,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:31:53,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 2456 transitions. [2020-12-23 09:31:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:31:53,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:53,211 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:53,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 09:31:53,211 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:53,213 INFO L82 PathProgramCache]: Analyzing trace with hash -429352574, now seen corresponding path program 1 times [2020-12-23 09:31:53,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:53,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064627491] [2020-12-23 09:31:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:53,296 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 09:31:53,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064627491] [2020-12-23 09:31:53,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:53,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:31:53,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971186550] [2020-12-23 09:31:53,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:31:53,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:53,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:31:53,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:31:53,299 INFO L87 Difference]: Start difference. First operand 1756 states and 2456 transitions. Second operand 5 states. [2020-12-23 09:31:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:54,007 INFO L93 Difference]: Finished difference Result 5997 states and 8451 transitions. [2020-12-23 09:31:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:31:54,008 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-23 09:31:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:54,035 INFO L225 Difference]: With dead ends: 5997 [2020-12-23 09:31:54,035 INFO L226 Difference]: Without dead ends: 4289 [2020-12-23 09:31:54,041 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 09:31:54,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2020-12-23 09:31:54,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 1843. [2020-12-23 09:31:54,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1843 states. [2020-12-23 09:31:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2543 transitions. [2020-12-23 09:31:54,321 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2543 transitions. Word has length 135 [2020-12-23 09:31:54,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:54,321 INFO L481 AbstractCegarLoop]: Abstraction has 1843 states and 2543 transitions. [2020-12-23 09:31:54,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:31:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2543 transitions. [2020-12-23 09:31:54,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:31:54,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:54,325 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:54,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 09:31:54,325 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:54,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:54,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1925032708, now seen corresponding path program 1 times [2020-12-23 09:31:54,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:54,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4365845] [2020-12-23 09:31:54,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:54,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:54,418 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 09:31:54,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4365845] [2020-12-23 09:31:54,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:54,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:54,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417184131] [2020-12-23 09:31:54,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:54,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:54,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:54,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:54,421 INFO L87 Difference]: Start difference. First operand 1843 states and 2543 transitions. Second operand 4 states. [2020-12-23 09:31:55,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:55,059 INFO L93 Difference]: Finished difference Result 6024 states and 8299 transitions. [2020-12-23 09:31:55,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:55,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-23 09:31:55,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:55,082 INFO L225 Difference]: With dead ends: 6024 [2020-12-23 09:31:55,083 INFO L226 Difference]: Without dead ends: 4234 [2020-12-23 09:31:55,087 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 09:31:55,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2020-12-23 09:31:55,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 3386. [2020-12-23 09:31:55,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3386 states. [2020-12-23 09:31:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 4647 transitions. [2020-12-23 09:31:55,528 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 4647 transitions. Word has length 135 [2020-12-23 09:31:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:55,529 INFO L481 AbstractCegarLoop]: Abstraction has 3386 states and 4647 transitions. [2020-12-23 09:31:55,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:31:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 4647 transitions. [2020-12-23 09:31:55,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:31:55,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:55,533 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:55,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 09:31:55,534 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:55,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:55,534 INFO L82 PathProgramCache]: Analyzing trace with hash 538351429, now seen corresponding path program 1 times [2020-12-23 09:31:55,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:55,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821320235] [2020-12-23 09:31:55,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:55,608 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 09:31:55,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821320235] [2020-12-23 09:31:55,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:55,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:31:55,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27268446] [2020-12-23 09:31:55,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:31:55,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:55,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:31:55,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:31:55,611 INFO L87 Difference]: Start difference. First operand 3386 states and 4647 transitions. Second operand 5 states. [2020-12-23 09:31:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:56,603 INFO L93 Difference]: Finished difference Result 9081 states and 12543 transitions. [2020-12-23 09:31:56,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:31:56,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-23 09:31:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:56,639 INFO L225 Difference]: With dead ends: 9081 [2020-12-23 09:31:56,639 INFO L226 Difference]: Without dead ends: 5752 [2020-12-23 09:31:56,648 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 09:31:56,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5752 states. [2020-12-23 09:31:57,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5752 to 3470. [2020-12-23 09:31:57,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3470 states. [2020-12-23 09:31:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 4706 transitions. [2020-12-23 09:31:57,110 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 4706 transitions. Word has length 135 [2020-12-23 09:31:57,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:57,110 INFO L481 AbstractCegarLoop]: Abstraction has 3470 states and 4706 transitions. [2020-12-23 09:31:57,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:31:57,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 4706 transitions. [2020-12-23 09:31:57,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:31:57,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:57,114 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:57,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 09:31:57,114 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:57,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:57,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1880133049, now seen corresponding path program 1 times [2020-12-23 09:31:57,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:57,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576106652] [2020-12-23 09:31:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:57,179 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 09:31:57,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576106652] [2020-12-23 09:31:57,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:57,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:31:57,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580267156] [2020-12-23 09:31:57,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:31:57,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:57,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:31:57,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:31:57,187 INFO L87 Difference]: Start difference. First operand 3470 states and 4706 transitions. Second operand 5 states. [2020-12-23 09:31:58,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:58,243 INFO L93 Difference]: Finished difference Result 11099 states and 15185 transitions. [2020-12-23 09:31:58,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:31:58,243 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-23 09:31:58,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:58,263 INFO L225 Difference]: With dead ends: 11099 [2020-12-23 09:31:58,264 INFO L226 Difference]: Without dead ends: 7693 [2020-12-23 09:31:58,274 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 09:31:58,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2020-12-23 09:31:58,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 3629. [2020-12-23 09:31:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3629 states. [2020-12-23 09:31:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 4865 transitions. [2020-12-23 09:31:58,891 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 4865 transitions. Word has length 135 [2020-12-23 09:31:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:31:58,892 INFO L481 AbstractCegarLoop]: Abstraction has 3629 states and 4865 transitions. [2020-12-23 09:31:58,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:31:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 4865 transitions. [2020-12-23 09:31:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:31:58,896 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:31:58,897 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:31:58,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 09:31:58,897 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:31:58,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:31:58,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1639893303, now seen corresponding path program 1 times [2020-12-23 09:31:58,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:31:58,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214229800] [2020-12-23 09:31:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:31:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:31:59,001 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 09:31:59,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214229800] [2020-12-23 09:31:59,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:31:59,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:31:59,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143006576] [2020-12-23 09:31:59,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:31:59,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:31:59,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:31:59,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:31:59,006 INFO L87 Difference]: Start difference. First operand 3629 states and 4865 transitions. Second operand 4 states. [2020-12-23 09:31:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:31:59,784 INFO L93 Difference]: Finished difference Result 8819 states and 11814 transitions. [2020-12-23 09:31:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:31:59,785 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-23 09:31:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:31:59,798 INFO L225 Difference]: With dead ends: 8819 [2020-12-23 09:31:59,798 INFO L226 Difference]: Without dead ends: 5259 [2020-12-23 09:31:59,805 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 09:31:59,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2020-12-23 09:32:00,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 3629. [2020-12-23 09:32:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3629 states. [2020-12-23 09:32:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 4848 transitions. [2020-12-23 09:32:00,225 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 4848 transitions. Word has length 135 [2020-12-23 09:32:00,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:00,226 INFO L481 AbstractCegarLoop]: Abstraction has 3629 states and 4848 transitions. [2020-12-23 09:32:00,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:32:00,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 4848 transitions. [2020-12-23 09:32:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:32:00,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:00,230 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:00,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 09:32:00,230 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:00,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:00,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1612827701, now seen corresponding path program 1 times [2020-12-23 09:32:00,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:00,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742212457] [2020-12-23 09:32:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:00,288 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 09:32:00,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742212457] [2020-12-23 09:32:00,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:00,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:00,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441213236] [2020-12-23 09:32:00,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:32:00,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:00,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:32:00,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:32:00,290 INFO L87 Difference]: Start difference. First operand 3629 states and 4848 transitions. Second operand 4 states. [2020-12-23 09:32:00,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:00,950 INFO L93 Difference]: Finished difference Result 8818 states and 11775 transitions. [2020-12-23 09:32:00,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:32:00,950 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-23 09:32:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:00,967 INFO L225 Difference]: With dead ends: 8818 [2020-12-23 09:32:00,968 INFO L226 Difference]: Without dead ends: 5259 [2020-12-23 09:32:00,979 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 09:32:00,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2020-12-23 09:32:01,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 3629. [2020-12-23 09:32:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3629 states. [2020-12-23 09:32:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 4831 transitions. [2020-12-23 09:32:01,355 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 4831 transitions. Word has length 135 [2020-12-23 09:32:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:01,356 INFO L481 AbstractCegarLoop]: Abstraction has 3629 states and 4831 transitions. [2020-12-23 09:32:01,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:32:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 4831 transitions. [2020-12-23 09:32:01,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:32:01,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:01,360 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:01,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-23 09:32:01,360 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:01,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:01,361 INFO L82 PathProgramCache]: Analyzing trace with hash 604802697, now seen corresponding path program 1 times [2020-12-23 09:32:01,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:01,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597079686] [2020-12-23 09:32:01,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:01,420 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 09:32:01,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597079686] [2020-12-23 09:32:01,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:01,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:01,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629206941] [2020-12-23 09:32:01,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:32:01,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:01,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:32:01,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:32:01,422 INFO L87 Difference]: Start difference. First operand 3629 states and 4831 transitions. Second operand 4 states. [2020-12-23 09:32:02,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:02,105 INFO L93 Difference]: Finished difference Result 9379 states and 12439 transitions. [2020-12-23 09:32:02,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:32:02,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-23 09:32:02,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:02,118 INFO L225 Difference]: With dead ends: 9379 [2020-12-23 09:32:02,118 INFO L226 Difference]: Without dead ends: 5821 [2020-12-23 09:32:02,125 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 09:32:02,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5821 states. [2020-12-23 09:32:02,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5821 to 4183. [2020-12-23 09:32:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4183 states. [2020-12-23 09:32:02,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 5504 transitions. [2020-12-23 09:32:02,562 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 5504 transitions. Word has length 135 [2020-12-23 09:32:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:02,562 INFO L481 AbstractCegarLoop]: Abstraction has 4183 states and 5504 transitions. [2020-12-23 09:32:02,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:32:02,563 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 5504 transitions. [2020-12-23 09:32:02,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:32:02,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:02,566 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:02,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 09:32:02,567 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:02,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:02,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1956060149, now seen corresponding path program 1 times [2020-12-23 09:32:02,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:02,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982147616] [2020-12-23 09:32:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:02,637 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 09:32:02,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982147616] [2020-12-23 09:32:02,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:02,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:02,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690210255] [2020-12-23 09:32:02,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:32:02,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:02,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:32:02,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:32:02,643 INFO L87 Difference]: Start difference. First operand 4183 states and 5504 transitions. Second operand 4 states. [2020-12-23 09:32:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:03,547 INFO L93 Difference]: Finished difference Result 9977 states and 13131 transitions. [2020-12-23 09:32:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:32:03,550 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-23 09:32:03,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:03,565 INFO L225 Difference]: With dead ends: 9977 [2020-12-23 09:32:03,566 INFO L226 Difference]: Without dead ends: 5926 [2020-12-23 09:32:03,575 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 09:32:03,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2020-12-23 09:32:04,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 4099. [2020-12-23 09:32:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4099 states. [2020-12-23 09:32:04,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4099 states to 4099 states and 5347 transitions. [2020-12-23 09:32:04,088 INFO L78 Accepts]: Start accepts. Automaton has 4099 states and 5347 transitions. Word has length 135 [2020-12-23 09:32:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:04,089 INFO L481 AbstractCegarLoop]: Abstraction has 4099 states and 5347 transitions. [2020-12-23 09:32:04,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:32:04,089 INFO L276 IsEmpty]: Start isEmpty. Operand 4099 states and 5347 transitions. [2020-12-23 09:32:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:32:04,092 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:04,092 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:04,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-23 09:32:04,093 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:04,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:04,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1879159351, now seen corresponding path program 1 times [2020-12-23 09:32:04,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:04,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398498347] [2020-12-23 09:32:04,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:04,153 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 09:32:04,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398498347] [2020-12-23 09:32:04,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:04,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:04,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847034221] [2020-12-23 09:32:04,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:32:04,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:04,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:32:04,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:32:04,155 INFO L87 Difference]: Start difference. First operand 4099 states and 5347 transitions. Second operand 4 states. [2020-12-23 09:32:04,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:04,798 INFO L93 Difference]: Finished difference Result 9166 states and 11944 transitions. [2020-12-23 09:32:04,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:32:04,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-23 09:32:04,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:04,812 INFO L225 Difference]: With dead ends: 9166 [2020-12-23 09:32:04,813 INFO L226 Difference]: Without dead ends: 5116 [2020-12-23 09:32:04,821 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 09:32:04,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5116 states. [2020-12-23 09:32:05,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5116 to 4099. [2020-12-23 09:32:05,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4099 states. [2020-12-23 09:32:05,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4099 states to 4099 states and 5272 transitions. [2020-12-23 09:32:05,210 INFO L78 Accepts]: Start accepts. Automaton has 4099 states and 5272 transitions. Word has length 135 [2020-12-23 09:32:05,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:05,210 INFO L481 AbstractCegarLoop]: Abstraction has 4099 states and 5272 transitions. [2020-12-23 09:32:05,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:32:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4099 states and 5272 transitions. [2020-12-23 09:32:05,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:32:05,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:05,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:05,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-23 09:32:05,214 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:05,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:05,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1448457291, now seen corresponding path program 1 times [2020-12-23 09:32:05,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:05,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076960444] [2020-12-23 09:32:05,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:05,276 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 09:32:05,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076960444] [2020-12-23 09:32:05,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:05,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:05,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047435626] [2020-12-23 09:32:05,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:32:05,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:05,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:32:05,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:32:05,278 INFO L87 Difference]: Start difference. First operand 4099 states and 5272 transitions. Second operand 4 states. [2020-12-23 09:32:05,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:05,891 INFO L93 Difference]: Finished difference Result 9710 states and 12481 transitions. [2020-12-23 09:32:05,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:32:05,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-23 09:32:05,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:05,898 INFO L225 Difference]: With dead ends: 9710 [2020-12-23 09:32:05,898 INFO L226 Difference]: Without dead ends: 5694 [2020-12-23 09:32:05,903 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 09:32:05,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5694 states. [2020-12-23 09:32:06,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5694 to 3937. [2020-12-23 09:32:06,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3937 states. [2020-12-23 09:32:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3937 states to 3937 states and 4985 transitions. [2020-12-23 09:32:06,407 INFO L78 Accepts]: Start accepts. Automaton has 3937 states and 4985 transitions. Word has length 135 [2020-12-23 09:32:06,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:06,408 INFO L481 AbstractCegarLoop]: Abstraction has 3937 states and 4985 transitions. [2020-12-23 09:32:06,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:32:06,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3937 states and 4985 transitions. [2020-12-23 09:32:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:32:06,411 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:06,411 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:06,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-23 09:32:06,412 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:06,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:06,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1586087216, now seen corresponding path program 1 times [2020-12-23 09:32:06,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:06,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668963992] [2020-12-23 09:32:06,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:06,488 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 09:32:06,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668963992] [2020-12-23 09:32:06,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:06,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:06,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370168540] [2020-12-23 09:32:06,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:32:06,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:06,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:32:06,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:32:06,491 INFO L87 Difference]: Start difference. First operand 3937 states and 4985 transitions. Second operand 4 states. [2020-12-23 09:32:07,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:07,143 INFO L93 Difference]: Finished difference Result 9250 states and 11734 transitions. [2020-12-23 09:32:07,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:32:07,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-23 09:32:07,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:07,149 INFO L225 Difference]: With dead ends: 9250 [2020-12-23 09:32:07,149 INFO L226 Difference]: Without dead ends: 5443 [2020-12-23 09:32:07,154 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 09:32:07,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5443 states. [2020-12-23 09:32:07,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5443 to 3853. [2020-12-23 09:32:07,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3853 states. [2020-12-23 09:32:07,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3853 states to 3853 states and 4828 transitions. [2020-12-23 09:32:07,646 INFO L78 Accepts]: Start accepts. Automaton has 3853 states and 4828 transitions. Word has length 135 [2020-12-23 09:32:07,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:07,647 INFO L481 AbstractCegarLoop]: Abstraction has 3853 states and 4828 transitions. [2020-12-23 09:32:07,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:32:07,647 INFO L276 IsEmpty]: Start isEmpty. Operand 3853 states and 4828 transitions. [2020-12-23 09:32:07,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:32:07,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:07,650 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:07,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-23 09:32:07,650 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:07,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:07,651 INFO L82 PathProgramCache]: Analyzing trace with hash -632147058, now seen corresponding path program 1 times [2020-12-23 09:32:07,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:07,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877861202] [2020-12-23 09:32:07,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:07,709 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 09:32:07,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877861202] [2020-12-23 09:32:07,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:07,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:07,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301025877] [2020-12-23 09:32:07,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:32:07,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:07,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:32:07,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:32:07,711 INFO L87 Difference]: Start difference. First operand 3853 states and 4828 transitions. Second operand 4 states. [2020-12-23 09:32:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:08,465 INFO L93 Difference]: Finished difference Result 9962 states and 12408 transitions. [2020-12-23 09:32:08,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 09:32:08,466 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 135 [2020-12-23 09:32:08,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:08,472 INFO L225 Difference]: With dead ends: 9962 [2020-12-23 09:32:08,472 INFO L226 Difference]: Without dead ends: 6218 [2020-12-23 09:32:08,476 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 09:32:08,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6218 states. [2020-12-23 09:32:08,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6218 to 4613. [2020-12-23 09:32:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4613 states. [2020-12-23 09:32:08,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 5623 transitions. [2020-12-23 09:32:08,961 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 5623 transitions. Word has length 135 [2020-12-23 09:32:08,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:08,961 INFO L481 AbstractCegarLoop]: Abstraction has 4613 states and 5623 transitions. [2020-12-23 09:32:08,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 09:32:08,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 5623 transitions. [2020-12-23 09:32:08,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:32:08,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:08,965 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:08,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-23 09:32:08,965 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:08,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:08,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1537703699, now seen corresponding path program 1 times [2020-12-23 09:32:08,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:08,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621323353] [2020-12-23 09:32:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:09,026 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 09:32:09,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621323353] [2020-12-23 09:32:09,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:09,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:32:09,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79120199] [2020-12-23 09:32:09,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:32:09,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:09,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:32:09,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:32:09,028 INFO L87 Difference]: Start difference. First operand 4613 states and 5623 transitions. Second operand 5 states. [2020-12-23 09:32:09,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:09,626 INFO L93 Difference]: Finished difference Result 10307 states and 12667 transitions. [2020-12-23 09:32:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:32:09,626 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-23 09:32:09,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:09,633 INFO L225 Difference]: With dead ends: 10307 [2020-12-23 09:32:09,633 INFO L226 Difference]: Without dead ends: 5775 [2020-12-23 09:32:09,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 09:32:09,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5775 states. [2020-12-23 09:32:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5775 to 4625. [2020-12-23 09:32:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4625 states. [2020-12-23 09:32:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 5559 transitions. [2020-12-23 09:32:10,103 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 5559 transitions. Word has length 135 [2020-12-23 09:32:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:10,103 INFO L481 AbstractCegarLoop]: Abstraction has 4625 states and 5559 transitions. [2020-12-23 09:32:10,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:32:10,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 5559 transitions. [2020-12-23 09:32:10,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-23 09:32:10,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:10,106 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:10,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-23 09:32:10,106 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:10,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:10,107 INFO L82 PathProgramCache]: Analyzing trace with hash 640310421, now seen corresponding path program 1 times [2020-12-23 09:32:10,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:10,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966575629] [2020-12-23 09:32:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:10,166 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 09:32:10,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966575629] [2020-12-23 09:32:10,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:10,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:10,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146385475] [2020-12-23 09:32:10,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:32:10,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:10,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:32:10,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:32:10,169 INFO L87 Difference]: Start difference. First operand 4625 states and 5559 transitions. Second operand 3 states. [2020-12-23 09:32:10,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:10,838 INFO L93 Difference]: Finished difference Result 12925 states and 15489 transitions. [2020-12-23 09:32:10,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:32:10,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 135 [2020-12-23 09:32:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:10,850 INFO L225 Difference]: With dead ends: 12925 [2020-12-23 09:32:10,850 INFO L226 Difference]: Without dead ends: 8527 [2020-12-23 09:32:10,857 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 09:32:10,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2020-12-23 09:32:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 8525. [2020-12-23 09:32:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8525 states. [2020-12-23 09:32:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8525 states to 8525 states and 10155 transitions. [2020-12-23 09:32:11,595 INFO L78 Accepts]: Start accepts. Automaton has 8525 states and 10155 transitions. Word has length 135 [2020-12-23 09:32:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:11,595 INFO L481 AbstractCegarLoop]: Abstraction has 8525 states and 10155 transitions. [2020-12-23 09:32:11,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:32:11,596 INFO L276 IsEmpty]: Start isEmpty. Operand 8525 states and 10155 transitions. [2020-12-23 09:32:11,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 09:32:11,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:11,601 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:11,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-23 09:32:11,601 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:11,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:11,601 INFO L82 PathProgramCache]: Analyzing trace with hash -2062462870, now seen corresponding path program 1 times [2020-12-23 09:32:11,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:11,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875178956] [2020-12-23 09:32:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:11,662 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 09:32:11,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875178956] [2020-12-23 09:32:11,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:11,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:11,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929279352] [2020-12-23 09:32:11,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:32:11,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:11,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:32:11,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:32:11,664 INFO L87 Difference]: Start difference. First operand 8525 states and 10155 transitions. Second operand 3 states. [2020-12-23 09:32:12,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:12,901 INFO L93 Difference]: Finished difference Result 24470 states and 29095 transitions. [2020-12-23 09:32:12,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:32:12,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-23 09:32:12,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:12,922 INFO L225 Difference]: With dead ends: 24470 [2020-12-23 09:32:12,922 INFO L226 Difference]: Without dead ends: 16172 [2020-12-23 09:32:12,935 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 09:32:12,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16172 states. [2020-12-23 09:32:14,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16172 to 16170. [2020-12-23 09:32:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16170 states. [2020-12-23 09:32:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16170 states to 16170 states and 19157 transitions. [2020-12-23 09:32:14,482 INFO L78 Accepts]: Start accepts. Automaton has 16170 states and 19157 transitions. Word has length 136 [2020-12-23 09:32:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:14,482 INFO L481 AbstractCegarLoop]: Abstraction has 16170 states and 19157 transitions. [2020-12-23 09:32:14,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:32:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 16170 states and 19157 transitions. [2020-12-23 09:32:14,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 09:32:14,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:14,490 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:14,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-23 09:32:14,490 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:14,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:14,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1687631852, now seen corresponding path program 1 times [2020-12-23 09:32:14,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:14,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330065159] [2020-12-23 09:32:14,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:14,530 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 09:32:14,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330065159] [2020-12-23 09:32:14,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:14,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:14,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178047246] [2020-12-23 09:32:14,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:32:14,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:14,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:32:14,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:32:14,536 INFO L87 Difference]: Start difference. First operand 16170 states and 19157 transitions. Second operand 3 states. [2020-12-23 09:32:15,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:15,868 INFO L93 Difference]: Finished difference Result 31892 states and 37806 transitions. [2020-12-23 09:32:15,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:32:15,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-23 09:32:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:15,884 INFO L225 Difference]: With dead ends: 31892 [2020-12-23 09:32:15,884 INFO L226 Difference]: Without dead ends: 15949 [2020-12-23 09:32:15,895 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 09:32:15,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15949 states. [2020-12-23 09:32:17,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15949 to 15949. [2020-12-23 09:32:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15949 states. [2020-12-23 09:32:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15949 states to 15949 states and 18906 transitions. [2020-12-23 09:32:17,267 INFO L78 Accepts]: Start accepts. Automaton has 15949 states and 18906 transitions. Word has length 136 [2020-12-23 09:32:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:17,267 INFO L481 AbstractCegarLoop]: Abstraction has 15949 states and 18906 transitions. [2020-12-23 09:32:17,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:32:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 15949 states and 18906 transitions. [2020-12-23 09:32:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-23 09:32:17,272 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:17,273 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:17,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-23 09:32:17,273 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:17,273 INFO L82 PathProgramCache]: Analyzing trace with hash -223223088, now seen corresponding path program 1 times [2020-12-23 09:32:17,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:17,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985580462] [2020-12-23 09:32:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:17,334 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 09:32:17,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985580462] [2020-12-23 09:32:17,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:17,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:17,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794919] [2020-12-23 09:32:17,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:32:17,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:32:17,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:32:17,336 INFO L87 Difference]: Start difference. First operand 15949 states and 18906 transitions. Second operand 3 states. [2020-12-23 09:32:20,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:20,266 INFO L93 Difference]: Finished difference Result 46013 states and 54516 transitions. [2020-12-23 09:32:20,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:32:20,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-12-23 09:32:20,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:20,298 INFO L225 Difference]: With dead ends: 46013 [2020-12-23 09:32:20,298 INFO L226 Difference]: Without dead ends: 30291 [2020-12-23 09:32:20,311 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 09:32:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30291 states. [2020-12-23 09:32:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30291 to 30289. [2020-12-23 09:32:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30289 states. [2020-12-23 09:32:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30289 states to 30289 states and 35810 transitions. [2020-12-23 09:32:22,873 INFO L78 Accepts]: Start accepts. Automaton has 30289 states and 35810 transitions. Word has length 137 [2020-12-23 09:32:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:22,874 INFO L481 AbstractCegarLoop]: Abstraction has 30289 states and 35810 transitions. [2020-12-23 09:32:22,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:32:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 30289 states and 35810 transitions. [2020-12-23 09:32:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-23 09:32:22,884 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:22,884 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:22,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-23 09:32:22,884 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:22,885 INFO L82 PathProgramCache]: Analyzing trace with hash -768095662, now seen corresponding path program 1 times [2020-12-23 09:32:22,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:22,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205033061] [2020-12-23 09:32:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:22,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:22,919 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 09:32:22,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205033061] [2020-12-23 09:32:22,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:22,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:22,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674222980] [2020-12-23 09:32:22,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:32:22,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:22,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:32:22,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:32:22,921 INFO L87 Difference]: Start difference. First operand 30289 states and 35810 transitions. Second operand 3 states. [2020-12-23 09:32:25,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:25,754 INFO L93 Difference]: Finished difference Result 60131 states and 71115 transitions. [2020-12-23 09:32:25,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:32:25,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2020-12-23 09:32:25,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:25,787 INFO L225 Difference]: With dead ends: 60131 [2020-12-23 09:32:25,787 INFO L226 Difference]: Without dead ends: 30069 [2020-12-23 09:32:25,811 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 09:32:25,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30069 states. [2020-12-23 09:32:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30069 to 30069. [2020-12-23 09:32:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30069 states. [2020-12-23 09:32:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30069 states to 30069 states and 35561 transitions. [2020-12-23 09:32:28,769 INFO L78 Accepts]: Start accepts. Automaton has 30069 states and 35561 transitions. Word has length 137 [2020-12-23 09:32:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:28,769 INFO L481 AbstractCegarLoop]: Abstraction has 30069 states and 35561 transitions. [2020-12-23 09:32:28,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:32:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 30069 states and 35561 transitions. [2020-12-23 09:32:28,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 09:32:28,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:28,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:28,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-12-23 09:32:28,780 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:28,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:28,780 INFO L82 PathProgramCache]: Analyzing trace with hash 2058170927, now seen corresponding path program 1 times [2020-12-23 09:32:28,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:28,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484296558] [2020-12-23 09:32:28,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:28,844 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 09:32:28,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484296558] [2020-12-23 09:32:28,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:28,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:28,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829296730] [2020-12-23 09:32:28,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:32:28,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:28,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:32:28,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:32:28,846 INFO L87 Difference]: Start difference. First operand 30069 states and 35561 transitions. Second operand 3 states. [2020-12-23 09:32:34,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:34,166 INFO L93 Difference]: Finished difference Result 88236 states and 104257 transitions. [2020-12-23 09:32:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:32:34,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-23 09:32:34,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:34,253 INFO L225 Difference]: With dead ends: 88236 [2020-12-23 09:32:34,253 INFO L226 Difference]: Without dead ends: 58394 [2020-12-23 09:32:34,281 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 09:32:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58394 states. [2020-12-23 09:32:39,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58394 to 58392. [2020-12-23 09:32:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58392 states. [2020-12-23 09:32:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58392 states to 58392 states and 68863 transitions. [2020-12-23 09:32:39,900 INFO L78 Accepts]: Start accepts. Automaton has 58392 states and 68863 transitions. Word has length 138 [2020-12-23 09:32:39,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:39,901 INFO L481 AbstractCegarLoop]: Abstraction has 58392 states and 68863 transitions. [2020-12-23 09:32:39,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:32:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 58392 states and 68863 transitions. [2020-12-23 09:32:39,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 09:32:39,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:39,917 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:39,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-12-23 09:32:39,917 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:39,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:39,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1513298353, now seen corresponding path program 1 times [2020-12-23 09:32:39,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:39,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722060607] [2020-12-23 09:32:39,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:39,974 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 09:32:39,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722060607] [2020-12-23 09:32:39,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:39,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:39,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510874782] [2020-12-23 09:32:39,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:32:39,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:39,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:32:39,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:32:39,980 INFO L87 Difference]: Start difference. First operand 58392 states and 68863 transitions. Second operand 3 states. [2020-12-23 09:32:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:32:45,612 INFO L93 Difference]: Finished difference Result 116338 states and 137224 transitions. [2020-12-23 09:32:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:32:45,612 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2020-12-23 09:32:45,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:32:45,693 INFO L225 Difference]: With dead ends: 116338 [2020-12-23 09:32:45,693 INFO L226 Difference]: Without dead ends: 58173 [2020-12-23 09:32:45,741 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 09:32:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58173 states. [2020-12-23 09:32:51,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58173 to 58173. [2020-12-23 09:32:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58173 states. [2020-12-23 09:32:51,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58173 states to 58173 states and 68616 transitions. [2020-12-23 09:32:51,184 INFO L78 Accepts]: Start accepts. Automaton has 58173 states and 68616 transitions. Word has length 138 [2020-12-23 09:32:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:32:51,184 INFO L481 AbstractCegarLoop]: Abstraction has 58173 states and 68616 transitions. [2020-12-23 09:32:51,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:32:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 58173 states and 68616 transitions. [2020-12-23 09:32:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-23 09:32:51,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:32:51,197 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:32:51,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-23 09:32:51,197 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:32:51,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:32:51,198 INFO L82 PathProgramCache]: Analyzing trace with hash -197589749, now seen corresponding path program 1 times [2020-12-23 09:32:51,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:32:51,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060111871] [2020-12-23 09:32:51,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:32:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:32:51,279 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 09:32:51,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060111871] [2020-12-23 09:32:51,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:32:51,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:32:51,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652572607] [2020-12-23 09:32:51,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:32:51,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:32:51,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:32:51,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:32:51,281 INFO L87 Difference]: Start difference. First operand 58173 states and 68616 transitions. Second operand 3 states. [2020-12-23 09:33:01,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:33:01,203 INFO L93 Difference]: Finished difference Result 168075 states and 198222 transitions. [2020-12-23 09:33:01,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:33:01,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 139 [2020-12-23 09:33:01,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:33:01,355 INFO L225 Difference]: With dead ends: 168075 [2020-12-23 09:33:01,355 INFO L226 Difference]: Without dead ends: 110129 [2020-12-23 09:33:01,607 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 09:33:01,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110129 states. [2020-12-23 09:33:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110129 to 110127. [2020-12-23 09:33:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110127 states. [2020-12-23 09:33:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110127 states to 110127 states and 129708 transitions. [2020-12-23 09:33:12,298 INFO L78 Accepts]: Start accepts. Automaton has 110127 states and 129708 transitions. Word has length 139 [2020-12-23 09:33:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:33:12,299 INFO L481 AbstractCegarLoop]: Abstraction has 110127 states and 129708 transitions. [2020-12-23 09:33:12,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:33:12,299 INFO L276 IsEmpty]: Start isEmpty. Operand 110127 states and 129708 transitions. [2020-12-23 09:33:12,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-23 09:33:12,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:33:12,337 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:33:12,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-12-23 09:33:12,338 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:33:12,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:33:12,338 INFO L82 PathProgramCache]: Analyzing trace with hash -742462323, now seen corresponding path program 1 times [2020-12-23 09:33:12,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:33:12,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444329700] [2020-12-23 09:33:12,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:33:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:33:12,371 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 09:33:12,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444329700] [2020-12-23 09:33:12,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:33:12,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:33:12,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378737231] [2020-12-23 09:33:12,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:33:12,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:33:12,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:33:12,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:33:12,373 INFO L87 Difference]: Start difference. First operand 110127 states and 129708 transitions. Second operand 3 states. [2020-12-23 09:33:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:33:22,871 INFO L93 Difference]: Finished difference Result 219825 states and 258935 transitions. [2020-12-23 09:33:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:33:22,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 139 [2020-12-23 09:33:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:33:23,052 INFO L225 Difference]: With dead ends: 219825 [2020-12-23 09:33:23,053 INFO L226 Difference]: Without dead ends: 109909 [2020-12-23 09:33:23,314 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 09:33:23,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109909 states. [2020-12-23 09:33:33,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109909 to 109909. [2020-12-23 09:33:33,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109909 states. [2020-12-23 09:33:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109909 states to 109909 states and 129463 transitions. [2020-12-23 09:33:33,652 INFO L78 Accepts]: Start accepts. Automaton has 109909 states and 129463 transitions. Word has length 139 [2020-12-23 09:33:33,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:33:33,652 INFO L481 AbstractCegarLoop]: Abstraction has 109909 states and 129463 transitions. [2020-12-23 09:33:33,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:33:33,653 INFO L276 IsEmpty]: Start isEmpty. Operand 109909 states and 129463 transitions. [2020-12-23 09:33:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-23 09:33:33,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:33:33,675 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:33:33,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-12-23 09:33:33,675 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:33:33,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:33:33,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2058133492, now seen corresponding path program 1 times [2020-12-23 09:33:33,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:33:33,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127166510] [2020-12-23 09:33:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:33:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:33:33,945 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 09:33:33,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127166510] [2020-12-23 09:33:33,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:33:33,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 09:33:33,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127072292] [2020-12-23 09:33:33,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 09:33:33,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:33:33,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 09:33:33,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 09:33:33,954 INFO L87 Difference]: Start difference. First operand 109909 states and 129463 transitions. Second operand 4 states.