/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/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:50:17,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:50:18,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:50:18,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:50:18,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:50:18,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:50:18,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:50:18,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:50:18,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:50:18,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:50:18,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:50:18,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:50:18,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:50:18,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:50:18,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:50:18,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:50:18,105 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:50:18,106 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:50:18,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:50:18,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:50:18,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:50:18,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:50:18,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:50:18,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:50:18,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:50:18,123 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:50:18,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:50:18,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:50:18,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:50:18,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:50:18,127 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:50:18,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:50:18,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:50:18,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:50:18,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:50:18,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:50:18,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:50:18,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:50:18,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:50:18,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:50:18,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:50:18,137 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 09:50:18,164 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:50:18,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:50:18,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:50:18,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:50:18,167 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:50:18,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:50:18,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:50:18,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:50:18,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:50:18,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:50:18,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:50:18,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:50:18,169 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:50:18,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:50:18,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:50:18,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:50:18,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:50:18,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:50:18,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:50:18,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:50:18,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:50:18,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:50:18,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:50:18,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:50:18,172 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:50:18,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:50:18,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:50:18,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:50:18,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:50:18,588 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:50:18,588 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:50:18,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2020-12-23 09:50:18,668 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fce8a383a/9b4b55b987b347bca7f6c5a4fc90aa96/FLAG7a912c583 [2020-12-23 09:50:19,327 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:50:19,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2020-12-23 09:50:19,344 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fce8a383a/9b4b55b987b347bca7f6c5a4fc90aa96/FLAG7a912c583 [2020-12-23 09:50:19,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fce8a383a/9b4b55b987b347bca7f6c5a4fc90aa96 [2020-12-23 09:50:19,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:50:19,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:50:19,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:50:19,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:50:19,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:50:19,703 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:50:19" (1/1) ... [2020-12-23 09:50:19,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e244ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:19, skipping insertion in model container [2020-12-23 09:50:19,705 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:50:19" (1/1) ... [2020-12-23 09:50:19,715 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:50:19,783 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m4~0,] left hand side expression in assignment: lhs: VariableLHS[~m4~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] [2020-12-23 09:50:20,024 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/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c[9376,9389] [2020-12-23 09:50:20,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:50:20,039 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m4~0,] left hand side expression in assignment: lhs: VariableLHS[~m4~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] [2020-12-23 09:50:20,102 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/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c[9376,9389] [2020-12-23 09:50:20,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:50:20,125 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:50:20,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:20 WrapperNode [2020-12-23 09:50:20,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:50:20,128 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:50:20,128 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:50:20,128 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:50:20,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:20" (1/1) ... [2020-12-23 09:50:20,149 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:20" (1/1) ... [2020-12-23 09:50:20,199 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:50:20,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:50:20,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:50:20,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:50:20,219 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:20" (1/1) ... [2020-12-23 09:50:20,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:20" (1/1) ... [2020-12-23 09:50:20,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:20" (1/1) ... [2020-12-23 09:50:20,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:20" (1/1) ... [2020-12-23 09:50:20,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:20" (1/1) ... [2020-12-23 09:50:20,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:20" (1/1) ... [2020-12-23 09:50:20,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:20" (1/1) ... [2020-12-23 09:50:20,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:50:20,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:50:20,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:50:20,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:50:20,292 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:20" (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 09:50:20,391 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:50:20,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:50:20,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:50:20,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:50:21,219 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:50:21,219 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-23 09:50:21,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:50:21 BoogieIcfgContainer [2020-12-23 09:50:21,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:50:21,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:50:21,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:50:21,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:50:21,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:50:19" (1/3) ... [2020-12-23 09:50:21,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee41ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:50:21, skipping insertion in model container [2020-12-23 09:50:21,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:20" (2/3) ... [2020-12-23 09:50:21,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ee41ad8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:50:21, skipping insertion in model container [2020-12-23 09:50:21,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:50:21" (3/3) ... [2020-12-23 09:50:21,232 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2020-12-23 09:50:21,241 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:50:21,248 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:50:21,270 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:50:21,297 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:50:21,298 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:50:21,298 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:50:21,298 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:50:21,298 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:50:21,298 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:50:21,298 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:50:21,298 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:50:21,315 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states. [2020-12-23 09:50:21,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 09:50:21,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:21,325 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] [2020-12-23 09:50:21,325 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:21,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:21,332 INFO L82 PathProgramCache]: Analyzing trace with hash -107778019, now seen corresponding path program 1 times [2020-12-23 09:50:21,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:21,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043034760] [2020-12-23 09:50:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:21,647 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 09:50:21,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043034760] [2020-12-23 09:50:21,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:21,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:50:21,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298331937] [2020-12-23 09:50:21,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 09:50:21,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:21,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 09:50:21,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 09:50:21,681 INFO L87 Difference]: Start difference. First operand 98 states. Second operand 2 states. [2020-12-23 09:50:21,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:21,733 INFO L93 Difference]: Finished difference Result 163 states and 269 transitions. [2020-12-23 09:50:21,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 09:50:21,735 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2020-12-23 09:50:21,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:21,750 INFO L225 Difference]: With dead ends: 163 [2020-12-23 09:50:21,750 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 09:50:21,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 09:50:21,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 09:50:21,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-23 09:50:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 09:50:21,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 156 transitions. [2020-12-23 09:50:21,802 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 156 transitions. Word has length 29 [2020-12-23 09:50:21,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:21,802 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 156 transitions. [2020-12-23 09:50:21,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 09:50:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 156 transitions. [2020-12-23 09:50:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 09:50:21,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:21,805 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] [2020-12-23 09:50:21,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:50:21,806 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:21,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:21,807 INFO L82 PathProgramCache]: Analyzing trace with hash -241791525, now seen corresponding path program 1 times [2020-12-23 09:50:21,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:21,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445780165] [2020-12-23 09:50:21,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:21,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:21,978 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 09:50:21,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445780165] [2020-12-23 09:50:21,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:21,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:50:21,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133282474] [2020-12-23 09:50:21,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:50:21,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:21,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:50:21,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:50:21,983 INFO L87 Difference]: Start difference. First operand 94 states and 156 transitions. Second operand 5 states. [2020-12-23 09:50:22,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:22,128 INFO L93 Difference]: Finished difference Result 162 states and 262 transitions. [2020-12-23 09:50:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:50:22,128 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-23 09:50:22,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:22,133 INFO L225 Difference]: With dead ends: 162 [2020-12-23 09:50:22,133 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 09:50:22,136 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 09:50:22,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 09:50:22,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-23 09:50:22,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 09:50:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 132 transitions. [2020-12-23 09:50:22,155 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 132 transitions. Word has length 29 [2020-12-23 09:50:22,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:22,155 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 132 transitions. [2020-12-23 09:50:22,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:50:22,156 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 132 transitions. [2020-12-23 09:50:22,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 09:50:22,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:22,159 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] [2020-12-23 09:50:22,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:50:22,159 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:22,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:22,162 INFO L82 PathProgramCache]: Analyzing trace with hash 747245012, now seen corresponding path program 1 times [2020-12-23 09:50:22,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:22,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345799485] [2020-12-23 09:50:22,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:22,343 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 09:50:22,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345799485] [2020-12-23 09:50:22,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:22,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:22,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427426022] [2020-12-23 09:50:22,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:22,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:22,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:22,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:22,347 INFO L87 Difference]: Start difference. First operand 94 states and 132 transitions. Second operand 3 states. [2020-12-23 09:50:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:22,372 INFO L93 Difference]: Finished difference Result 210 states and 316 transitions. [2020-12-23 09:50:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:22,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-23 09:50:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:22,375 INFO L225 Difference]: With dead ends: 210 [2020-12-23 09:50:22,375 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 09:50:22,376 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 09:50:22,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 09:50:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2020-12-23 09:50:22,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 09:50:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 212 transitions. [2020-12-23 09:50:22,391 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 212 transitions. Word has length 52 [2020-12-23 09:50:22,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:22,392 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 212 transitions. [2020-12-23 09:50:22,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 212 transitions. [2020-12-23 09:50:22,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 09:50:22,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:22,394 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] [2020-12-23 09:50:22,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 09:50:22,395 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:22,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:22,396 INFO L82 PathProgramCache]: Analyzing trace with hash 396878357, now seen corresponding path program 1 times [2020-12-23 09:50:22,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:22,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19847850] [2020-12-23 09:50:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:22,593 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 09:50:22,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19847850] [2020-12-23 09:50:22,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:22,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:22,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118463913] [2020-12-23 09:50:22,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:22,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:22,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:22,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:22,601 INFO L87 Difference]: Start difference. First operand 144 states and 212 transitions. Second operand 3 states. [2020-12-23 09:50:22,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:22,647 INFO L93 Difference]: Finished difference Result 348 states and 536 transitions. [2020-12-23 09:50:22,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:22,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-23 09:50:22,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:22,653 INFO L225 Difference]: With dead ends: 348 [2020-12-23 09:50:22,653 INFO L226 Difference]: Without dead ends: 234 [2020-12-23 09:50:22,658 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 09:50:22,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-23 09:50:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-12-23 09:50:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-23 09:50:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 351 transitions. [2020-12-23 09:50:22,712 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 351 transitions. Word has length 53 [2020-12-23 09:50:22,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:22,713 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 351 transitions. [2020-12-23 09:50:22,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 351 transitions. [2020-12-23 09:50:22,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 09:50:22,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:22,718 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] [2020-12-23 09:50:22,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 09:50:22,719 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:22,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:22,723 INFO L82 PathProgramCache]: Analyzing trace with hash -778312060, now seen corresponding path program 1 times [2020-12-23 09:50:22,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:22,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726433902] [2020-12-23 09:50:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:22,890 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 09:50:22,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726433902] [2020-12-23 09:50:22,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:22,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:22,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408644787] [2020-12-23 09:50:22,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:22,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:22,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:22,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:22,895 INFO L87 Difference]: Start difference. First operand 232 states and 351 transitions. Second operand 3 states. [2020-12-23 09:50:22,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:22,963 INFO L93 Difference]: Finished difference Result 588 states and 913 transitions. [2020-12-23 09:50:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:22,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-23 09:50:22,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:22,971 INFO L225 Difference]: With dead ends: 588 [2020-12-23 09:50:22,971 INFO L226 Difference]: Without dead ends: 386 [2020-12-23 09:50:22,975 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 09:50:22,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-12-23 09:50:23,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 384. [2020-12-23 09:50:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-12-23 09:50:23,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 587 transitions. [2020-12-23 09:50:23,013 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 587 transitions. Word has length 54 [2020-12-23 09:50:23,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:23,014 INFO L481 AbstractCegarLoop]: Abstraction has 384 states and 587 transitions. [2020-12-23 09:50:23,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:23,014 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 587 transitions. [2020-12-23 09:50:23,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 09:50:23,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:23,020 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] [2020-12-23 09:50:23,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 09:50:23,022 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:23,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:23,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1214154885, now seen corresponding path program 1 times [2020-12-23 09:50:23,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:23,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119370458] [2020-12-23 09:50:23,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:23,183 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 09:50:23,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119370458] [2020-12-23 09:50:23,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:23,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:23,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32763972] [2020-12-23 09:50:23,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:23,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:23,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:23,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:23,188 INFO L87 Difference]: Start difference. First operand 384 states and 587 transitions. Second operand 6 states. [2020-12-23 09:50:23,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:23,376 INFO L93 Difference]: Finished difference Result 2154 states and 3372 transitions. [2020-12-23 09:50:23,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:23,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-12-23 09:50:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:23,388 INFO L225 Difference]: With dead ends: 2154 [2020-12-23 09:50:23,388 INFO L226 Difference]: Without dead ends: 1800 [2020-12-23 09:50:23,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:50:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2020-12-23 09:50:23,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 736. [2020-12-23 09:50:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-12-23 09:50:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1127 transitions. [2020-12-23 09:50:23,435 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1127 transitions. Word has length 55 [2020-12-23 09:50:23,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:23,436 INFO L481 AbstractCegarLoop]: Abstraction has 736 states and 1127 transitions. [2020-12-23 09:50:23,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:23,436 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1127 transitions. [2020-12-23 09:50:23,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 09:50:23,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:23,437 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] [2020-12-23 09:50:23,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 09:50:23,438 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:23,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:23,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1399227554, now seen corresponding path program 1 times [2020-12-23 09:50:23,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:23,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624911160] [2020-12-23 09:50:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:23,625 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 09:50:23,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624911160] [2020-12-23 09:50:23,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:23,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:23,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883806052] [2020-12-23 09:50:23,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:23,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:23,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:23,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:23,630 INFO L87 Difference]: Start difference. First operand 736 states and 1127 transitions. Second operand 6 states. [2020-12-23 09:50:23,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:23,889 INFO L93 Difference]: Finished difference Result 3296 states and 5059 transitions. [2020-12-23 09:50:23,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:23,889 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-12-23 09:50:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:23,904 INFO L225 Difference]: With dead ends: 3296 [2020-12-23 09:50:23,905 INFO L226 Difference]: Without dead ends: 2590 [2020-12-23 09:50:23,908 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:23,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2020-12-23 09:50:24,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2584. [2020-12-23 09:50:24,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2584 states. [2020-12-23 09:50:24,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 3943 transitions. [2020-12-23 09:50:24,051 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 3943 transitions. Word has length 56 [2020-12-23 09:50:24,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:24,051 INFO L481 AbstractCegarLoop]: Abstraction has 2584 states and 3943 transitions. [2020-12-23 09:50:24,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:24,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 3943 transitions. [2020-12-23 09:50:24,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 09:50:24,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:24,054 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] [2020-12-23 09:50:24,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 09:50:24,055 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:24,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:24,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1806755418, now seen corresponding path program 1 times [2020-12-23 09:50:24,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:24,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874793987] [2020-12-23 09:50:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:24,193 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 09:50:24,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874793987] [2020-12-23 09:50:24,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:24,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 09:50:24,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173716203] [2020-12-23 09:50:24,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:50:24,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:24,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:50:24,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:50:24,197 INFO L87 Difference]: Start difference. First operand 2584 states and 3943 transitions. Second operand 8 states. [2020-12-23 09:50:24,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:24,698 INFO L93 Difference]: Finished difference Result 5394 states and 8112 transitions. [2020-12-23 09:50:24,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:50:24,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-12-23 09:50:24,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:24,729 INFO L225 Difference]: With dead ends: 5394 [2020-12-23 09:50:24,730 INFO L226 Difference]: Without dead ends: 5392 [2020-12-23 09:50:24,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:50:24,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5392 states. [2020-12-23 09:50:24,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5392 to 2776. [2020-12-23 09:50:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2776 states. [2020-12-23 09:50:25,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 4135 transitions. [2020-12-23 09:50:25,002 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 4135 transitions. Word has length 57 [2020-12-23 09:50:25,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:25,004 INFO L481 AbstractCegarLoop]: Abstraction has 2776 states and 4135 transitions. [2020-12-23 09:50:25,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:50:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 4135 transitions. [2020-12-23 09:50:25,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 09:50:25,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:25,005 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] [2020-12-23 09:50:25,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 09:50:25,006 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:25,007 INFO L82 PathProgramCache]: Analyzing trace with hash 227421697, now seen corresponding path program 1 times [2020-12-23 09:50:25,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:25,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990746690] [2020-12-23 09:50:25,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:25,083 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 09:50:25,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990746690] [2020-12-23 09:50:25,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:25,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:25,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666989040] [2020-12-23 09:50:25,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:25,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:25,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:25,092 INFO L87 Difference]: Start difference. First operand 2776 states and 4135 transitions. Second operand 3 states. [2020-12-23 09:50:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:25,430 INFO L93 Difference]: Finished difference Result 7508 states and 11137 transitions. [2020-12-23 09:50:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:25,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-12-23 09:50:25,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:25,456 INFO L225 Difference]: With dead ends: 7508 [2020-12-23 09:50:25,456 INFO L226 Difference]: Without dead ends: 4762 [2020-12-23 09:50:25,464 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 09:50:25,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4762 states. [2020-12-23 09:50:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4762 to 4704. [2020-12-23 09:50:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4704 states. [2020-12-23 09:50:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 6863 transitions. [2020-12-23 09:50:25,831 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 6863 transitions. Word has length 58 [2020-12-23 09:50:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:25,831 INFO L481 AbstractCegarLoop]: Abstraction has 4704 states and 6863 transitions. [2020-12-23 09:50:25,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 6863 transitions. [2020-12-23 09:50:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 09:50:25,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:25,833 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] [2020-12-23 09:50:25,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 09:50:25,834 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:25,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:25,834 INFO L82 PathProgramCache]: Analyzing trace with hash -2122531684, now seen corresponding path program 1 times [2020-12-23 09:50:25,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:25,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340763525] [2020-12-23 09:50:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:25,901 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 09:50:25,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340763525] [2020-12-23 09:50:25,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:25,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:25,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66092787] [2020-12-23 09:50:25,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:25,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:25,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:25,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:25,905 INFO L87 Difference]: Start difference. First operand 4704 states and 6863 transitions. Second operand 3 states. [2020-12-23 09:50:26,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:26,304 INFO L93 Difference]: Finished difference Result 9495 states and 13925 transitions. [2020-12-23 09:50:26,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:26,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-23 09:50:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:26,341 INFO L225 Difference]: With dead ends: 9495 [2020-12-23 09:50:26,341 INFO L226 Difference]: Without dead ends: 6748 [2020-12-23 09:50:26,348 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 09:50:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6748 states. [2020-12-23 09:50:26,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6748 to 6746. [2020-12-23 09:50:26,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6746 states. [2020-12-23 09:50:26,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6746 states to 6746 states and 9753 transitions. [2020-12-23 09:50:26,785 INFO L78 Accepts]: Start accepts. Automaton has 6746 states and 9753 transitions. Word has length 59 [2020-12-23 09:50:26,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:26,785 INFO L481 AbstractCegarLoop]: Abstraction has 6746 states and 9753 transitions. [2020-12-23 09:50:26,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:26,786 INFO L276 IsEmpty]: Start isEmpty. Operand 6746 states and 9753 transitions. [2020-12-23 09:50:26,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 09:50:26,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:26,792 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:26,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 09:50:26,792 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:26,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1837654200, now seen corresponding path program 1 times [2020-12-23 09:50:26,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:26,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560196203] [2020-12-23 09:50:26,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:26,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560196203] [2020-12-23 09:50:26,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:26,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:26,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697173078] [2020-12-23 09:50:26,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:26,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:26,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:26,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:26,862 INFO L87 Difference]: Start difference. First operand 6746 states and 9753 transitions. Second operand 3 states. [2020-12-23 09:50:27,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:27,570 INFO L93 Difference]: Finished difference Result 16149 states and 23297 transitions. [2020-12-23 09:50:27,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:27,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-23 09:50:27,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:27,631 INFO L225 Difference]: With dead ends: 16149 [2020-12-23 09:50:27,632 INFO L226 Difference]: Without dead ends: 10819 [2020-12-23 09:50:27,642 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 09:50:27,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10819 states. [2020-12-23 09:50:28,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10819 to 10265. [2020-12-23 09:50:28,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10265 states. [2020-12-23 09:50:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10265 states to 10265 states and 14655 transitions. [2020-12-23 09:50:28,398 INFO L78 Accepts]: Start accepts. Automaton has 10265 states and 14655 transitions. Word has length 81 [2020-12-23 09:50:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:28,399 INFO L481 AbstractCegarLoop]: Abstraction has 10265 states and 14655 transitions. [2020-12-23 09:50:28,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 10265 states and 14655 transitions. [2020-12-23 09:50:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 09:50:28,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:28,408 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:28,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 09:50:28,408 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:28,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:28,409 INFO L82 PathProgramCache]: Analyzing trace with hash 357196104, now seen corresponding path program 1 times [2020-12-23 09:50:28,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:28,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803525558] [2020-12-23 09:50:28,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:28,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 09:50:28,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803525558] [2020-12-23 09:50:28,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:28,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:28,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674495907] [2020-12-23 09:50:28,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:28,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:28,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:28,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:28,510 INFO L87 Difference]: Start difference. First operand 10265 states and 14655 transitions. Second operand 6 states. [2020-12-23 09:50:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:29,633 INFO L93 Difference]: Finished difference Result 22007 states and 31732 transitions. [2020-12-23 09:50:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:29,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-23 09:50:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:29,678 INFO L225 Difference]: With dead ends: 22007 [2020-12-23 09:50:29,679 INFO L226 Difference]: Without dead ends: 18477 [2020-12-23 09:50:29,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:50:29,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18477 states. [2020-12-23 09:50:30,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18477 to 13697. [2020-12-23 09:50:30,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13697 states. [2020-12-23 09:50:30,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13697 states to 13697 states and 19543 transitions. [2020-12-23 09:50:30,592 INFO L78 Accepts]: Start accepts. Automaton has 13697 states and 19543 transitions. Word has length 81 [2020-12-23 09:50:30,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:30,593 INFO L481 AbstractCegarLoop]: Abstraction has 13697 states and 19543 transitions. [2020-12-23 09:50:30,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:30,593 INFO L276 IsEmpty]: Start isEmpty. Operand 13697 states and 19543 transitions. [2020-12-23 09:50:30,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 09:50:30,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:30,603 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:30,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 09:50:30,604 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:30,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:30,606 INFO L82 PathProgramCache]: Analyzing trace with hash 784542168, now seen corresponding path program 1 times [2020-12-23 09:50:30,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:30,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147745643] [2020-12-23 09:50:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:30,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147745643] [2020-12-23 09:50:30,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:30,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:30,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744886033] [2020-12-23 09:50:30,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:30,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:30,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:30,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:30,682 INFO L87 Difference]: Start difference. First operand 13697 states and 19543 transitions. Second operand 3 states. [2020-12-23 09:50:31,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:31,443 INFO L93 Difference]: Finished difference Result 22049 states and 31326 transitions. [2020-12-23 09:50:31,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:31,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 81 [2020-12-23 09:50:31,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:31,484 INFO L225 Difference]: With dead ends: 22049 [2020-12-23 09:50:31,484 INFO L226 Difference]: Without dead ends: 14489 [2020-12-23 09:50:31,500 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 09:50:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14489 states. [2020-12-23 09:50:32,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14489 to 13785. [2020-12-23 09:50:32,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13785 states. [2020-12-23 09:50:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13785 states to 13785 states and 19337 transitions. [2020-12-23 09:50:32,236 INFO L78 Accepts]: Start accepts. Automaton has 13785 states and 19337 transitions. Word has length 81 [2020-12-23 09:50:32,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:32,236 INFO L481 AbstractCegarLoop]: Abstraction has 13785 states and 19337 transitions. [2020-12-23 09:50:32,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:32,237 INFO L276 IsEmpty]: Start isEmpty. Operand 13785 states and 19337 transitions. [2020-12-23 09:50:32,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 09:50:32,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:32,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:32,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 09:50:32,248 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:32,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:32,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1070855694, now seen corresponding path program 1 times [2020-12-23 09:50:32,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:32,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249983868] [2020-12-23 09:50:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-23 09:50:32,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249983868] [2020-12-23 09:50:32,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:32,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:32,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389174621] [2020-12-23 09:50:32,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:32,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:32,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:32,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:32,339 INFO L87 Difference]: Start difference. First operand 13785 states and 19337 transitions. Second operand 6 states. [2020-12-23 09:50:33,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:33,236 INFO L93 Difference]: Finished difference Result 22180 states and 31464 transitions. [2020-12-23 09:50:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:33,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-23 09:50:33,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:33,277 INFO L225 Difference]: With dead ends: 22180 [2020-12-23 09:50:33,277 INFO L226 Difference]: Without dead ends: 20366 [2020-12-23 09:50:33,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:50:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20366 states. [2020-12-23 09:50:34,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20366 to 15549. [2020-12-23 09:50:34,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15549 states. [2020-12-23 09:50:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15549 states to 15549 states and 21841 transitions. [2020-12-23 09:50:34,290 INFO L78 Accepts]: Start accepts. Automaton has 15549 states and 21841 transitions. Word has length 81 [2020-12-23 09:50:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:34,291 INFO L481 AbstractCegarLoop]: Abstraction has 15549 states and 21841 transitions. [2020-12-23 09:50:34,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:34,291 INFO L276 IsEmpty]: Start isEmpty. Operand 15549 states and 21841 transitions. [2020-12-23 09:50:34,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 09:50:34,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:34,301 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:34,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 09:50:34,302 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:34,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:34,302 INFO L82 PathProgramCache]: Analyzing trace with hash -200851310, now seen corresponding path program 1 times [2020-12-23 09:50:34,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:34,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609854989] [2020-12-23 09:50:34,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 09:50:34,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609854989] [2020-12-23 09:50:34,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:34,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:34,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201329792] [2020-12-23 09:50:34,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:34,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:34,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:34,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:34,421 INFO L87 Difference]: Start difference. First operand 15549 states and 21841 transitions. Second operand 6 states. [2020-12-23 09:50:35,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:35,531 INFO L93 Difference]: Finished difference Result 28205 states and 40003 transitions. [2020-12-23 09:50:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:35,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-12-23 09:50:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:35,576 INFO L225 Difference]: With dead ends: 28205 [2020-12-23 09:50:35,576 INFO L226 Difference]: Without dead ends: 23785 [2020-12-23 09:50:35,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:50:35,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23785 states. [2020-12-23 09:50:36,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23785 to 19533. [2020-12-23 09:50:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19533 states. [2020-12-23 09:50:36,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19533 states to 19533 states and 27433 transitions. [2020-12-23 09:50:36,707 INFO L78 Accepts]: Start accepts. Automaton has 19533 states and 27433 transitions. Word has length 81 [2020-12-23 09:50:36,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:36,707 INFO L481 AbstractCegarLoop]: Abstraction has 19533 states and 27433 transitions. [2020-12-23 09:50:36,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 19533 states and 27433 transitions. [2020-12-23 09:50:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 09:50:36,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:36,716 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] [2020-12-23 09:50:36,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 09:50:36,717 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:36,717 INFO L82 PathProgramCache]: Analyzing trace with hash 430986542, now seen corresponding path program 1 times [2020-12-23 09:50:36,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:36,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499015730] [2020-12-23 09:50:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:36,989 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 18 [2020-12-23 09:50:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:37,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499015730] [2020-12-23 09:50:37,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466424341] [2020-12-23 09:50:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:50:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:37,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 09:50:37,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:50:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:50:37,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:50:37,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-23 09:50:37,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055134519] [2020-12-23 09:50:37,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 09:50:37,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:37,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 09:50:37,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-23 09:50:37,583 INFO L87 Difference]: Start difference. First operand 19533 states and 27433 transitions. Second operand 12 states. [2020-12-23 09:50:47,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:47,743 INFO L93 Difference]: Finished difference Result 144332 states and 200955 transitions. [2020-12-23 09:50:47,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 09:50:47,744 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-12-23 09:50:47,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:47,991 INFO L225 Difference]: With dead ends: 144332 [2020-12-23 09:50:47,992 INFO L226 Difference]: Without dead ends: 125596 [2020-12-23 09:50:48,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1272 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=727, Invalid=3055, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 09:50:48,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125596 states. [2020-12-23 09:50:53,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125596 to 74844. [2020-12-23 09:50:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74844 states. [2020-12-23 09:50:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74844 states to 74844 states and 103709 transitions. [2020-12-23 09:50:53,232 INFO L78 Accepts]: Start accepts. Automaton has 74844 states and 103709 transitions. Word has length 82 [2020-12-23 09:50:53,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:53,232 INFO L481 AbstractCegarLoop]: Abstraction has 74844 states and 103709 transitions. [2020-12-23 09:50:53,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 09:50:53,233 INFO L276 IsEmpty]: Start isEmpty. Operand 74844 states and 103709 transitions. [2020-12-23 09:50:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:53,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:53,250 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:53,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 09:50:53,601 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:53,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:53,603 INFO L82 PathProgramCache]: Analyzing trace with hash -696935211, now seen corresponding path program 1 times [2020-12-23 09:50:53,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:53,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100752489] [2020-12-23 09:50:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:53,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100752489] [2020-12-23 09:50:53,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:53,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:53,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554173129] [2020-12-23 09:50:53,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:53,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:53,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:53,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:53,667 INFO L87 Difference]: Start difference. First operand 74844 states and 103709 transitions. Second operand 3 states. [2020-12-23 09:51:00,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:00,571 INFO L93 Difference]: Finished difference Result 209345 states and 289083 transitions. [2020-12-23 09:51:00,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:51:00,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-23 09:51:00,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:00,848 INFO L225 Difference]: With dead ends: 209345 [2020-12-23 09:51:00,848 INFO L226 Difference]: Without dead ends: 140040 [2020-12-23 09:51:01,145 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 09:51:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140040 states. [2020-12-23 09:51:08,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140040 to 140000. [2020-12-23 09:51:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140000 states. [2020-12-23 09:51:09,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140000 states to 140000 states and 191111 transitions. [2020-12-23 09:51:09,088 INFO L78 Accepts]: Start accepts. Automaton has 140000 states and 191111 transitions. Word has length 83 [2020-12-23 09:51:09,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:09,088 INFO L481 AbstractCegarLoop]: Abstraction has 140000 states and 191111 transitions. [2020-12-23 09:51:09,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:51:09,088 INFO L276 IsEmpty]: Start isEmpty. Operand 140000 states and 191111 transitions. [2020-12-23 09:51:09,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 09:51:09,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:09,106 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:51:09,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 09:51:09,107 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:09,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:09,108 INFO L82 PathProgramCache]: Analyzing trace with hash -58029941, now seen corresponding path program 1 times [2020-12-23 09:51:09,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:09,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633373708] [2020-12-23 09:51:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:51:09,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633373708] [2020-12-23 09:51:09,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:51:09,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:51:09,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852567990] [2020-12-23 09:51:09,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:51:09,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:09,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:51:09,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:51:09,171 INFO L87 Difference]: Start difference. First operand 140000 states and 191111 transitions. Second operand 3 states. [2020-12-23 09:51:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:19,374 INFO L93 Difference]: Finished difference Result 321160 states and 436722 transitions. [2020-12-23 09:51:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:51:19,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-23 09:51:19,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:19,753 INFO L225 Difference]: With dead ends: 321160 [2020-12-23 09:51:19,754 INFO L226 Difference]: Without dead ends: 197002 [2020-12-23 09:51:19,884 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 09:51:20,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197002 states. [2020-12-23 09:51:28,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197002 to 154539. [2020-12-23 09:51:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154539 states. [2020-12-23 09:51:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154539 states to 154539 states and 208693 transitions. [2020-12-23 09:51:29,170 INFO L78 Accepts]: Start accepts. Automaton has 154539 states and 208693 transitions. Word has length 84 [2020-12-23 09:51:29,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:29,170 INFO L481 AbstractCegarLoop]: Abstraction has 154539 states and 208693 transitions. [2020-12-23 09:51:29,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:51:29,170 INFO L276 IsEmpty]: Start isEmpty. Operand 154539 states and 208693 transitions. [2020-12-23 09:51:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 09:51:29,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:29,188 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:51:29,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 09:51:29,189 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:29,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:29,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2049046242, now seen corresponding path program 1 times [2020-12-23 09:51:29,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:29,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433691392] [2020-12-23 09:51:29,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:51:29,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433691392] [2020-12-23 09:51:29,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:51:29,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:51:29,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124302176] [2020-12-23 09:51:29,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:51:29,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:29,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:51:29,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:51:29,275 INFO L87 Difference]: Start difference. First operand 154539 states and 208693 transitions. Second operand 6 states. [2020-12-23 09:51:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:41,081 INFO L93 Difference]: Finished difference Result 248244 states and 337900 transitions. [2020-12-23 09:51:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:51:41,082 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-12-23 09:51:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:41,440 INFO L225 Difference]: With dead ends: 248244 [2020-12-23 09:51:41,440 INFO L226 Difference]: Without dead ends: 224363 [2020-12-23 09:51:41,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:51:41,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224363 states. [2020-12-23 09:51:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224363 to 172966. [2020-12-23 09:51:51,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172966 states. [2020-12-23 09:51:52,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172966 states to 172966 states and 233705 transitions. [2020-12-23 09:51:52,169 INFO L78 Accepts]: Start accepts. Automaton has 172966 states and 233705 transitions. Word has length 84 [2020-12-23 09:51:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:52,170 INFO L481 AbstractCegarLoop]: Abstraction has 172966 states and 233705 transitions. [2020-12-23 09:51:52,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:51:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand 172966 states and 233705 transitions. [2020-12-23 09:51:52,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 09:51:52,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:52,192 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:51:52,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 09:51:52,193 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:52,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:52,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2107383417, now seen corresponding path program 1 times [2020-12-23 09:51:52,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:52,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025791421] [2020-12-23 09:51:52,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:51:52,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025791421] [2020-12-23 09:51:52,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215022263] [2020-12-23 09:51:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:51:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:52,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:51:52,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:51:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:51:52,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:51:52,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 09:51:52,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083446016] [2020-12-23 09:51:52,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:51:52,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:52,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:51:52,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:51:52,656 INFO L87 Difference]: Start difference. First operand 172966 states and 233705 transitions. Second operand 11 states. [2020-12-23 09:52:14,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:52:14,188 INFO L93 Difference]: Finished difference Result 479291 states and 646433 transitions. [2020-12-23 09:52:14,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 09:52:14,188 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-12-23 09:52:14,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:52:15,065 INFO L225 Difference]: With dead ends: 479291 [2020-12-23 09:52:15,065 INFO L226 Difference]: Without dead ends: 366583 [2020-12-23 09:52:15,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:52:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366583 states. [2020-12-23 09:52:29,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366583 to 206468. [2020-12-23 09:52:29,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206468 states. [2020-12-23 09:52:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206468 states to 206468 states and 279214 transitions. [2020-12-23 09:52:29,688 INFO L78 Accepts]: Start accepts. Automaton has 206468 states and 279214 transitions. Word has length 85 [2020-12-23 09:52:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:52:29,688 INFO L481 AbstractCegarLoop]: Abstraction has 206468 states and 279214 transitions. [2020-12-23 09:52:29,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:52:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 206468 states and 279214 transitions. [2020-12-23 09:52:29,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 09:52:29,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:52:29,708 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:52:29,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:52:29,915 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:52:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:52:29,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1022787321, now seen corresponding path program 1 times [2020-12-23 09:52:29,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:52:29,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30819484] [2020-12-23 09:52:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:52:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:52:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:52:29,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30819484] [2020-12-23 09:52:29,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:52:29,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:52:29,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056621845] [2020-12-23 09:52:29,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:52:29,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:52:29,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:52:29,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:52:29,998 INFO L87 Difference]: Start difference. First operand 206468 states and 279214 transitions. Second operand 6 states. [2020-12-23 09:52:30,389 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-23 09:52:46,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:52:46,150 INFO L93 Difference]: Finished difference Result 431823 states and 582693 transitions. [2020-12-23 09:52:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:52:46,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-12-23 09:52:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:52:46,824 INFO L225 Difference]: With dead ends: 431823 [2020-12-23 09:52:46,825 INFO L226 Difference]: Without dead ends: 225474 [2020-12-23 09:52:47,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:52:47,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225474 states. [2020-12-23 09:53:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225474 to 219228. [2020-12-23 09:53:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219228 states. [2020-12-23 09:53:04,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219228 states to 219228 states and 292536 transitions. [2020-12-23 09:53:04,754 INFO L78 Accepts]: Start accepts. Automaton has 219228 states and 292536 transitions. Word has length 85 [2020-12-23 09:53:04,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:53:04,754 INFO L481 AbstractCegarLoop]: Abstraction has 219228 states and 292536 transitions. [2020-12-23 09:53:04,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:53:04,755 INFO L276 IsEmpty]: Start isEmpty. Operand 219228 states and 292536 transitions. [2020-12-23 09:53:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 09:53:04,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:53:04,776 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:53:04,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 09:53:04,776 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:53:04,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:53:04,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1021587727, now seen corresponding path program 1 times [2020-12-23 09:53:04,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:53:04,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261114106] [2020-12-23 09:53:04,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:53:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:53:04,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:53:04,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261114106] [2020-12-23 09:53:04,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853725905] [2020-12-23 09:53:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:53:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:53:05,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:53:05,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:53:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:53:05,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:53:05,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 09:53:05,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924484260] [2020-12-23 09:53:05,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:53:05,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:53:05,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:53:05,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:53:05,983 INFO L87 Difference]: Start difference. First operand 219228 states and 292536 transitions. Second operand 11 states. [2020-12-23 09:53:35,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:53:35,137 INFO L93 Difference]: Finished difference Result 555309 states and 740330 transitions. [2020-12-23 09:53:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 09:53:35,140 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 85 [2020-12-23 09:53:35,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:53:36,100 INFO L225 Difference]: With dead ends: 555309 [2020-12-23 09:53:36,100 INFO L226 Difference]: Without dead ends: 383054 [2020-12-23 09:53:36,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:53:36,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383054 states. [2020-12-23 09:53:53,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383054 to 219978. [2020-12-23 09:53:53,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219978 states. [2020-12-23 09:53:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219978 states to 219978 states and 294728 transitions. [2020-12-23 09:53:54,401 INFO L78 Accepts]: Start accepts. Automaton has 219978 states and 294728 transitions. Word has length 85 [2020-12-23 09:53:54,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:53:54,401 INFO L481 AbstractCegarLoop]: Abstraction has 219978 states and 294728 transitions. [2020-12-23 09:53:54,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:53:54,401 INFO L276 IsEmpty]: Start isEmpty. Operand 219978 states and 294728 transitions. [2020-12-23 09:53:54,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 09:53:54,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:53:54,416 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:53:54,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 09:53:54,617 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:53:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:53:54,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1934974863, now seen corresponding path program 1 times [2020-12-23 09:53:54,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:53:54,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337220491] [2020-12-23 09:53:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:53:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:53:54,671 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:53:54,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337220491] [2020-12-23 09:53:54,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:53:54,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:53:54,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164959492] [2020-12-23 09:53:54,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:53:54,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:53:54,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:53:54,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:53:54,673 INFO L87 Difference]: Start difference. First operand 219978 states and 294728 transitions. Second operand 3 states. [2020-12-23 09:54:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:05,349 INFO L93 Difference]: Finished difference Result 349506 states and 466829 transitions. [2020-12-23 09:54:05,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:05,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-23 09:54:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:05,594 INFO L225 Difference]: With dead ends: 349506 [2020-12-23 09:54:05,595 INFO L226 Difference]: Without dead ends: 129662 [2020-12-23 09:54:05,729 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 09:54:05,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129662 states.