/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.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:50:21,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:50:21,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:50:21,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:50:21,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:50:21,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:50:21,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:50:21,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:50:21,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:50:21,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:50:21,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:50:21,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:50:21,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:50:21,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:50:21,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:50:21,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:50:21,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:50:21,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:50:21,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:50:21,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:50:21,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:50:21,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:50:21,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:50:21,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:50:21,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:50:21,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:50:21,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:50:21,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:50:21,925 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:50:21,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:50:21,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:50:21,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:50:21,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:50:21,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:50:21,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:50:21,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:50:21,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:50:21,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:50:21,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:50:21,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:50:21,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:50:21,933 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 09:50:21,959 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:50:21,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:50:21,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:50:21,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:50:21,961 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:50:21,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:50:21,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:50:21,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:50:21,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:50:21,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:50:21,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:50:21,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:50:21,963 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:50:21,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:50:21,963 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:50:21,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:50:21,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:50:21,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:50:21,964 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:50:21,964 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:50:21,964 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:50:21,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:50:21,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:50:21,965 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:50:21,965 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:50:21,965 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:50:22,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:50:22,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:50:22,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:50:22,346 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:50:22,346 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:50:22,347 INFO L432 ainManager$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.ufo.UNBOUNDED.pals.c [2020-12-23 09:50:22,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd1cc341a/e605b573f4614cbfa8a2a61adbf163b1/FLAG2799aba38 [2020-12-23 09:50:23,040 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:50:23,040 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c [2020-12-23 09:50:23,051 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd1cc341a/e605b573f4614cbfa8a2a61adbf163b1/FLAG2799aba38 [2020-12-23 09:50:23,385 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dd1cc341a/e605b573f4614cbfa8a2a61adbf163b1 [2020-12-23 09:50:23,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:50:23,390 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:50:23,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:50:23,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:50:23,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:50:23,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:50:23" (1/1) ... [2020-12-23 09:50:23,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28133dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:23, skipping insertion in model container [2020-12-23 09:50:23,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:50:23" (1/1) ... [2020-12-23 09:50:23,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:50:23,469 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[~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 09:50:23,699 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.ufo.UNBOUNDED.pals.c[9488,9501] [2020-12-23 09:50:23,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:50:23,713 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[~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 09:50:23,786 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.ufo.UNBOUNDED.pals.c[9488,9501] [2020-12-23 09:50:23,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:50:23,810 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:50:23,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:23 WrapperNode [2020-12-23 09:50:23,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:50:23,812 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:50:23,813 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:50:23,813 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:50:23,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:23" (1/1) ... [2020-12-23 09:50:23,836 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:23" (1/1) ... [2020-12-23 09:50:23,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:50:23,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:50:23,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:50:23,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:50:23,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:23" (1/1) ... [2020-12-23 09:50:23,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:23" (1/1) ... [2020-12-23 09:50:23,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:23" (1/1) ... [2020-12-23 09:50:23,936 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:23" (1/1) ... [2020-12-23 09:50:23,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:23" (1/1) ... [2020-12-23 09:50:23,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:23" (1/1) ... [2020-12-23 09:50:23,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:23" (1/1) ... [2020-12-23 09:50:23,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:50:23,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:50:23,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:50:23,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:50:23,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:23" (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 09:50:24,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:50:24,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:50:24,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:50:24,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:50:24,695 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:50:24,695 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-23 09:50:24,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:50:24 BoogieIcfgContainer [2020-12-23 09:50:24,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:50:24,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:50:24,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:50:24,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:50:24,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:50:23" (1/3) ... [2020-12-23 09:50:24,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7dcf97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:50:24, skipping insertion in model container [2020-12-23 09:50:24,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:23" (2/3) ... [2020-12-23 09:50:24,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b7dcf97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:50:24, skipping insertion in model container [2020-12-23 09:50:24,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:50:24" (3/3) ... [2020-12-23 09:50:24,706 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c [2020-12-23 09:50:24,714 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:50:24,719 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:50:24,742 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:50:24,772 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:50:24,772 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:50:24,773 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:50:24,773 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:50:24,773 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:50:24,773 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:50:24,773 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:50:24,773 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:50:24,792 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states. [2020-12-23 09:50:24,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 09:50:24,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:24,802 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] [2020-12-23 09:50:24,802 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:24,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:24,809 INFO L82 PathProgramCache]: Analyzing trace with hash 773042370, now seen corresponding path program 1 times [2020-12-23 09:50:24,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:24,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962713065] [2020-12-23 09:50:24,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:25,079 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 09:50:25,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962713065] [2020-12-23 09:50:25,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:25,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:50:25,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325872911] [2020-12-23 09:50:25,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 09:50:25,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:25,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 09:50:25,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 09:50:25,107 INFO L87 Difference]: Start difference. First operand 101 states. Second operand 2 states. [2020-12-23 09:50:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:25,140 INFO L93 Difference]: Finished difference Result 169 states and 279 transitions. [2020-12-23 09:50:25,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 09:50:25,141 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-23 09:50:25,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:25,154 INFO L225 Difference]: With dead ends: 169 [2020-12-23 09:50:25,154 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 09:50:25,157 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 09:50:25,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 09:50:25,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-23 09:50:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 09:50:25,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 161 transitions. [2020-12-23 09:50:25,205 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 161 transitions. Word has length 30 [2020-12-23 09:50:25,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:25,206 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 161 transitions. [2020-12-23 09:50:25,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 09:50:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 161 transitions. [2020-12-23 09:50:25,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 09:50:25,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:25,209 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] [2020-12-23 09:50:25,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:50:25,209 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:25,211 INFO L82 PathProgramCache]: Analyzing trace with hash 913590980, now seen corresponding path program 1 times [2020-12-23 09:50:25,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:25,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325888947] [2020-12-23 09:50:25,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:25,327 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 09:50:25,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325888947] [2020-12-23 09:50:25,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:25,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:50:25,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016485040] [2020-12-23 09:50:25,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:50:25,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:25,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:50:25,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:50:25,335 INFO L87 Difference]: Start difference. First operand 97 states and 161 transitions. Second operand 5 states. [2020-12-23 09:50:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:25,477 INFO L93 Difference]: Finished difference Result 168 states and 272 transitions. [2020-12-23 09:50:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:50:25,478 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-23 09:50:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:25,480 INFO L225 Difference]: With dead ends: 168 [2020-12-23 09:50:25,480 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 09:50:25,481 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 09:50:25,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 09:50:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-23 09:50:25,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 09:50:25,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 137 transitions. [2020-12-23 09:50:25,492 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 137 transitions. Word has length 30 [2020-12-23 09:50:25,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:25,493 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 137 transitions. [2020-12-23 09:50:25,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:50:25,493 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 137 transitions. [2020-12-23 09:50:25,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 09:50:25,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:25,497 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 09:50:25,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:50:25,497 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:25,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:25,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1508952555, now seen corresponding path program 1 times [2020-12-23 09:50:25,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:25,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627322638] [2020-12-23 09:50:25,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:25,621 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 09:50:25,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627322638] [2020-12-23 09:50:25,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:25,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:25,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761008266] [2020-12-23 09:50:25,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:25,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:25,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:25,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:25,625 INFO L87 Difference]: Start difference. First operand 97 states and 137 transitions. Second operand 3 states. [2020-12-23 09:50:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:25,690 INFO L93 Difference]: Finished difference Result 219 states and 331 transitions. [2020-12-23 09:50:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:25,691 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-23 09:50:25,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:25,693 INFO L225 Difference]: With dead ends: 219 [2020-12-23 09:50:25,694 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 09:50:25,695 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 09:50:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 09:50:25,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-12-23 09:50:25,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 09:50:25,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 222 transitions. [2020-12-23 09:50:25,711 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 222 transitions. Word has length 53 [2020-12-23 09:50:25,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:25,711 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 222 transitions. [2020-12-23 09:50:25,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:25,712 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 222 transitions. [2020-12-23 09:50:25,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 09:50:25,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:25,714 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 09:50:25,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 09:50:25,714 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:25,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1759991574, now seen corresponding path program 1 times [2020-12-23 09:50:25,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:25,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449199046] [2020-12-23 09:50:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:25,813 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 09:50:25,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449199046] [2020-12-23 09:50:25,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:25,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:25,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141693514] [2020-12-23 09:50:25,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:25,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:25,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:25,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:25,821 INFO L87 Difference]: Start difference. First operand 150 states and 222 transitions. Second operand 3 states. [2020-12-23 09:50:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:25,870 INFO L93 Difference]: Finished difference Result 366 states and 566 transitions. [2020-12-23 09:50:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:25,873 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-23 09:50:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:25,877 INFO L225 Difference]: With dead ends: 366 [2020-12-23 09:50:25,879 INFO L226 Difference]: Without dead ends: 246 [2020-12-23 09:50:25,880 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 09:50:25,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-23 09:50:25,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2020-12-23 09:50:25,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-12-23 09:50:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 371 transitions. [2020-12-23 09:50:25,926 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 371 transitions. Word has length 54 [2020-12-23 09:50:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:25,926 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 371 transitions. [2020-12-23 09:50:25,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 371 transitions. [2020-12-23 09:50:25,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 09:50:25,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:25,931 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 09:50:25,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 09:50:25,931 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:25,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:25,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1078196827, now seen corresponding path program 1 times [2020-12-23 09:50:25,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:25,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127490457] [2020-12-23 09:50:25,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:26,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127490457] [2020-12-23 09:50:26,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:26,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:26,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159221603] [2020-12-23 09:50:26,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:26,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:26,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:26,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:26,033 INFO L87 Difference]: Start difference. First operand 244 states and 371 transitions. Second operand 3 states. [2020-12-23 09:50:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:26,066 INFO L93 Difference]: Finished difference Result 624 states and 973 transitions. [2020-12-23 09:50:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:26,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-23 09:50:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:26,070 INFO L225 Difference]: With dead ends: 624 [2020-12-23 09:50:26,070 INFO L226 Difference]: Without dead ends: 410 [2020-12-23 09:50:26,071 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 09:50:26,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-12-23 09:50:26,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-12-23 09:50:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-12-23 09:50:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 627 transitions. [2020-12-23 09:50:26,095 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 627 transitions. Word has length 55 [2020-12-23 09:50:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:26,096 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 627 transitions. [2020-12-23 09:50:26,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 627 transitions. [2020-12-23 09:50:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 09:50:26,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:26,097 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 09:50:26,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 09:50:26,098 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1363611750, now seen corresponding path program 1 times [2020-12-23 09:50:26,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:26,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297841016] [2020-12-23 09:50:26,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:26,297 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 09:50:26,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297841016] [2020-12-23 09:50:26,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:26,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:26,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937602733] [2020-12-23 09:50:26,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:26,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:26,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:26,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:26,301 INFO L87 Difference]: Start difference. First operand 408 states and 627 transitions. Second operand 6 states. [2020-12-23 09:50:26,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:26,483 INFO L93 Difference]: Finished difference Result 1764 states and 2747 transitions. [2020-12-23 09:50:26,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:26,484 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-12-23 09:50:26,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:26,493 INFO L225 Difference]: With dead ends: 1764 [2020-12-23 09:50:26,493 INFO L226 Difference]: Without dead ends: 1386 [2020-12-23 09:50:26,494 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 09:50:26,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2020-12-23 09:50:26,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1380. [2020-12-23 09:50:26,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1380 states. [2020-12-23 09:50:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2139 transitions. [2020-12-23 09:50:26,576 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2139 transitions. Word has length 56 [2020-12-23 09:50:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:26,577 INFO L481 AbstractCegarLoop]: Abstraction has 1380 states and 2139 transitions. [2020-12-23 09:50:26,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:26,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2139 transitions. [2020-12-23 09:50:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 09:50:26,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:26,579 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 09:50:26,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 09:50:26,579 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:26,580 INFO L82 PathProgramCache]: Analyzing trace with hash -2107679122, now seen corresponding path program 1 times [2020-12-23 09:50:26,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:26,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692390453] [2020-12-23 09:50:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:26,638 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 09:50:26,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692390453] [2020-12-23 09:50:26,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:26,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:26,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317047752] [2020-12-23 09:50:26,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:26,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:26,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:26,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:26,640 INFO L87 Difference]: Start difference. First operand 1380 states and 2139 transitions. Second operand 3 states. [2020-12-23 09:50:26,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:26,733 INFO L93 Difference]: Finished difference Result 3656 states and 5661 transitions. [2020-12-23 09:50:26,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:26,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-23 09:50:26,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:26,745 INFO L225 Difference]: With dead ends: 3656 [2020-12-23 09:50:26,745 INFO L226 Difference]: Without dead ends: 2306 [2020-12-23 09:50:26,748 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 09:50:26,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2020-12-23 09:50:26,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2304. [2020-12-23 09:50:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2304 states. [2020-12-23 09:50:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3519 transitions. [2020-12-23 09:50:26,850 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3519 transitions. Word has length 57 [2020-12-23 09:50:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:26,850 INFO L481 AbstractCegarLoop]: Abstraction has 2304 states and 3519 transitions. [2020-12-23 09:50:26,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3519 transitions. [2020-12-23 09:50:26,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 09:50:26,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:26,852 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 09:50:26,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 09:50:26,852 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:26,853 INFO L82 PathProgramCache]: Analyzing trace with hash 903862406, now seen corresponding path program 1 times [2020-12-23 09:50:26,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:26,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237211779] [2020-12-23 09:50:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:26,946 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 09:50:26,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237211779] [2020-12-23 09:50:26,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:26,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:26,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520359576] [2020-12-23 09:50:26,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:26,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:26,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:26,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:26,950 INFO L87 Difference]: Start difference. First operand 2304 states and 3519 transitions. Second operand 6 states. [2020-12-23 09:50:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:27,357 INFO L93 Difference]: Finished difference Result 10426 states and 15988 transitions. [2020-12-23 09:50:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:27,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-12-23 09:50:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:27,398 INFO L225 Difference]: With dead ends: 10426 [2020-12-23 09:50:27,398 INFO L226 Difference]: Without dead ends: 8152 [2020-12-23 09:50:27,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:50:27,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8152 states. [2020-12-23 09:50:27,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8152 to 4576. [2020-12-23 09:50:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4576 states. [2020-12-23 09:50:27,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 6879 transitions. [2020-12-23 09:50:27,772 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 6879 transitions. Word has length 57 [2020-12-23 09:50:27,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:27,773 INFO L481 AbstractCegarLoop]: Abstraction has 4576 states and 6879 transitions. [2020-12-23 09:50:27,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 6879 transitions. [2020-12-23 09:50:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 09:50:27,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:27,775 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 09:50:27,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 09:50:27,775 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:27,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:27,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1866607497, now seen corresponding path program 1 times [2020-12-23 09:50:27,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:27,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693016956] [2020-12-23 09:50:27,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:27,906 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 09:50:27,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693016956] [2020-12-23 09:50:27,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:27,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 09:50:27,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204649183] [2020-12-23 09:50:27,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:50:27,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:27,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:50:27,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:50:27,909 INFO L87 Difference]: Start difference. First operand 4576 states and 6879 transitions. Second operand 8 states. [2020-12-23 09:50:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:28,544 INFO L93 Difference]: Finished difference Result 9634 states and 14240 transitions. [2020-12-23 09:50:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:50:28,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-12-23 09:50:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:28,591 INFO L225 Difference]: With dead ends: 9634 [2020-12-23 09:50:28,591 INFO L226 Difference]: Without dead ends: 9632 [2020-12-23 09:50:28,595 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 09:50:28,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2020-12-23 09:50:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 4960. [2020-12-23 09:50:28,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4960 states. [2020-12-23 09:50:28,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 7263 transitions. [2020-12-23 09:50:28,974 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 7263 transitions. Word has length 58 [2020-12-23 09:50:28,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:28,978 INFO L481 AbstractCegarLoop]: Abstraction has 4960 states and 7263 transitions. [2020-12-23 09:50:28,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:50:28,979 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 7263 transitions. [2020-12-23 09:50:28,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 09:50:28,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:28,979 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 09:50:28,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 09:50:28,980 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:28,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:28,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2082836158, now seen corresponding path program 1 times [2020-12-23 09:50:28,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:28,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594696338] [2020-12-23 09:50:28,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:29,067 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 09:50:29,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594696338] [2020-12-23 09:50:29,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:29,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:29,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942826749] [2020-12-23 09:50:29,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:29,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:29,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:29,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:29,070 INFO L87 Difference]: Start difference. First operand 4960 states and 7263 transitions. Second operand 3 states. [2020-12-23 09:50:29,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:29,421 INFO L93 Difference]: Finished difference Result 12022 states and 17635 transitions. [2020-12-23 09:50:29,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:29,422 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-23 09:50:29,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:29,476 INFO L225 Difference]: With dead ends: 12022 [2020-12-23 09:50:29,477 INFO L226 Difference]: Without dead ends: 7092 [2020-12-23 09:50:29,485 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 09:50:29,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2020-12-23 09:50:29,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 7034. [2020-12-23 09:50:29,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7034 states. [2020-12-23 09:50:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 10233 transitions. [2020-12-23 09:50:29,931 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 10233 transitions. Word has length 59 [2020-12-23 09:50:29,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:29,931 INFO L481 AbstractCegarLoop]: Abstraction has 7034 states and 10233 transitions. [2020-12-23 09:50:29,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:29,931 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 10233 transitions. [2020-12-23 09:50:29,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:29,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:29,943 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:29,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 09:50:29,944 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:29,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:29,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1751499669, now seen corresponding path program 1 times [2020-12-23 09:50:29,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:29,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602923025] [2020-12-23 09:50:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:30,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602923025] [2020-12-23 09:50:30,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82140814] [2020-12-23 09:50:30,250 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 09:50:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:30,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 09:50:30,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:50:30,774 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 09:50:30,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:50:30,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-23 09:50:30,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412291051] [2020-12-23 09:50:30,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 09:50:30,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:30,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 09:50:30,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-12-23 09:50:30,777 INFO L87 Difference]: Start difference. First operand 7034 states and 10233 transitions. Second operand 12 states. [2020-12-23 09:50:36,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:36,127 INFO L93 Difference]: Finished difference Result 53516 states and 77163 transitions. [2020-12-23 09:50:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 09:50:36,128 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-12-23 09:50:36,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:36,233 INFO L225 Difference]: With dead ends: 53516 [2020-12-23 09:50:36,234 INFO L226 Difference]: Without dead ends: 46762 [2020-12-23 09:50:36,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=728, Invalid=3054, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 09:50:36,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46762 states. [2020-12-23 09:50:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46762 to 27022. [2020-12-23 09:50:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27022 states. [2020-12-23 09:50:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27022 states to 27022 states and 38871 transitions. [2020-12-23 09:50:38,288 INFO L78 Accepts]: Start accepts. Automaton has 27022 states and 38871 transitions. Word has length 83 [2020-12-23 09:50:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:38,288 INFO L481 AbstractCegarLoop]: Abstraction has 27022 states and 38871 transitions. [2020-12-23 09:50:38,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 09:50:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand 27022 states and 38871 transitions. [2020-12-23 09:50:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:38,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:38,297 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:38,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 09:50:38,512 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:38,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1216959876, now seen corresponding path program 1 times [2020-12-23 09:50:38,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:38,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256196787] [2020-12-23 09:50:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:38,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:38,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256196787] [2020-12-23 09:50:38,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:38,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:38,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251009547] [2020-12-23 09:50:38,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:38,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:38,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:38,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:38,582 INFO L87 Difference]: Start difference. First operand 27022 states and 38871 transitions. Second operand 3 states. [2020-12-23 09:50:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:40,021 INFO L93 Difference]: Finished difference Result 52398 states and 75377 transitions. [2020-12-23 09:50:40,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:40,024 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-23 09:50:40,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:40,099 INFO L225 Difference]: With dead ends: 52398 [2020-12-23 09:50:40,099 INFO L226 Difference]: Without dead ends: 37234 [2020-12-23 09:50:40,125 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 09:50:40,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37234 states. [2020-12-23 09:50:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37234 to 34890. [2020-12-23 09:50:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34890 states. [2020-12-23 09:50:42,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34890 states to 34890 states and 49605 transitions. [2020-12-23 09:50:42,116 INFO L78 Accepts]: Start accepts. Automaton has 34890 states and 49605 transitions. Word has length 83 [2020-12-23 09:50:42,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:42,116 INFO L481 AbstractCegarLoop]: Abstraction has 34890 states and 49605 transitions. [2020-12-23 09:50:42,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:42,116 INFO L276 IsEmpty]: Start isEmpty. Operand 34890 states and 49605 transitions. [2020-12-23 09:50:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:42,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:42,126 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:42,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 09:50:42,127 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:42,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:42,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1156984558, now seen corresponding path program 1 times [2020-12-23 09:50:42,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:42,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451921219] [2020-12-23 09:50:42,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:42,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:50:42,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451921219] [2020-12-23 09:50:42,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:42,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:42,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561043413] [2020-12-23 09:50:42,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:42,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:42,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:42,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:42,235 INFO L87 Difference]: Start difference. First operand 34890 states and 49605 transitions. Second operand 6 states. [2020-12-23 09:50:45,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:45,304 INFO L93 Difference]: Finished difference Result 80458 states and 115254 transitions. [2020-12-23 09:50:45,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:45,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-23 09:50:45,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:45,426 INFO L225 Difference]: With dead ends: 80458 [2020-12-23 09:50:45,426 INFO L226 Difference]: Without dead ends: 65120 [2020-12-23 09:50:45,454 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 09:50:45,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65120 states. [2020-12-23 09:50:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65120 to 48690. [2020-12-23 09:50:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48690 states. [2020-12-23 09:50:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48690 states to 48690 states and 69199 transitions. [2020-12-23 09:50:48,357 INFO L78 Accepts]: Start accepts. Automaton has 48690 states and 69199 transitions. Word has length 83 [2020-12-23 09:50:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:48,357 INFO L481 AbstractCegarLoop]: Abstraction has 48690 states and 69199 transitions. [2020-12-23 09:50:48,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:48,357 INFO L276 IsEmpty]: Start isEmpty. Operand 48690 states and 69199 transitions. [2020-12-23 09:50:48,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:48,368 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:48,368 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:48,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 09:50:48,368 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:48,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:48,369 INFO L82 PathProgramCache]: Analyzing trace with hash 103872526, now seen corresponding path program 1 times [2020-12-23 09:50:48,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:48,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912600890] [2020-12-23 09:50:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:48,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912600890] [2020-12-23 09:50:48,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:48,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:48,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497203605] [2020-12-23 09:50:48,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:48,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:48,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:48,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:48,463 INFO L87 Difference]: Start difference. First operand 48690 states and 69199 transitions. Second operand 3 states. [2020-12-23 09:50:51,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:51,225 INFO L93 Difference]: Finished difference Result 78601 states and 111237 transitions. [2020-12-23 09:50:51,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:51,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-23 09:50:51,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:51,303 INFO L225 Difference]: With dead ends: 78601 [2020-12-23 09:50:51,304 INFO L226 Difference]: Without dead ends: 50714 [2020-12-23 09:50:51,335 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 09:50:51,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50714 states. [2020-12-23 09:50:53,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50714 to 48532. [2020-12-23 09:50:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48532 states. [2020-12-23 09:50:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48532 states to 48532 states and 67794 transitions. [2020-12-23 09:50:53,753 INFO L78 Accepts]: Start accepts. Automaton has 48532 states and 67794 transitions. Word has length 83 [2020-12-23 09:50:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:53,754 INFO L481 AbstractCegarLoop]: Abstraction has 48532 states and 67794 transitions. [2020-12-23 09:50:53,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:53,754 INFO L276 IsEmpty]: Start isEmpty. Operand 48532 states and 67794 transitions. [2020-12-23 09:50:53,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:53,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:53,765 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:53,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 09:50:53,765 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:53,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:53,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1847168790, now seen corresponding path program 1 times [2020-12-23 09:50:53,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:53,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58383789] [2020-12-23 09:50:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 09:50:53,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58383789] [2020-12-23 09:50:53,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:53,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:53,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843006870] [2020-12-23 09:50:53,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:53,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:53,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:53,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:53,861 INFO L87 Difference]: Start difference. First operand 48532 states and 67794 transitions. Second operand 6 states. [2020-12-23 09:50:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:57,416 INFO L93 Difference]: Finished difference Result 90213 states and 127312 transitions. [2020-12-23 09:50:57,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:57,417 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-23 09:50:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:57,503 INFO L225 Difference]: With dead ends: 90213 [2020-12-23 09:50:57,504 INFO L226 Difference]: Without dead ends: 78791 [2020-12-23 09:50:57,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:50:57,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78791 states. [2020-12-23 09:51:00,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78791 to 59428. [2020-12-23 09:51:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59428 states. [2020-12-23 09:51:00,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59428 states to 59428 states and 83148 transitions. [2020-12-23 09:51:00,934 INFO L78 Accepts]: Start accepts. Automaton has 59428 states and 83148 transitions. Word has length 83 [2020-12-23 09:51:00,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:00,934 INFO L481 AbstractCegarLoop]: Abstraction has 59428 states and 83148 transitions. [2020-12-23 09:51:00,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:51:00,934 INFO L276 IsEmpty]: Start isEmpty. Operand 59428 states and 83148 transitions. [2020-12-23 09:51:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:51:00,944 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:00,944 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:51:00,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 09:51:00,945 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:00,945 INFO L82 PathProgramCache]: Analyzing trace with hash 591755980, now seen corresponding path program 1 times [2020-12-23 09:51:00,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:00,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279659890] [2020-12-23 09:51:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 09:51:01,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279659890] [2020-12-23 09:51:01,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:51:01,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:51:01,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269152148] [2020-12-23 09:51:01,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:51:01,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:01,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:51:01,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:51:01,036 INFO L87 Difference]: Start difference. First operand 59428 states and 83148 transitions. Second operand 6 states. [2020-12-23 09:51:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:04,862 INFO L93 Difference]: Finished difference Result 93685 states and 132050 transitions. [2020-12-23 09:51:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:51:04,862 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-23 09:51:04,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:04,964 INFO L225 Difference]: With dead ends: 93685 [2020-12-23 09:51:04,964 INFO L226 Difference]: Without dead ends: 86075 [2020-12-23 09:51:04,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:51:05,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86075 states. [2020-12-23 09:51:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86075 to 66712. [2020-12-23 09:51:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66712 states. [2020-12-23 09:51:08,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66712 states to 66712 states and 93442 transitions. [2020-12-23 09:51:08,480 INFO L78 Accepts]: Start accepts. Automaton has 66712 states and 93442 transitions. Word has length 83 [2020-12-23 09:51:08,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:08,480 INFO L481 AbstractCegarLoop]: Abstraction has 66712 states and 93442 transitions. [2020-12-23 09:51:08,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:51:08,480 INFO L276 IsEmpty]: Start isEmpty. Operand 66712 states and 93442 transitions. [2020-12-23 09:51:08,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 09:51:08,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:08,488 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 09:51:08,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 09:51:08,488 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:08,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1488535284, now seen corresponding path program 1 times [2020-12-23 09:51:08,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:08,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021379072] [2020-12-23 09:51:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:08,538 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 09:51:08,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021379072] [2020-12-23 09:51:08,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:51:08,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:51:08,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471874392] [2020-12-23 09:51:08,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:51:08,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:08,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:51:08,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:51:08,541 INFO L87 Difference]: Start difference. First operand 66712 states and 93442 transitions. Second operand 3 states. [2020-12-23 09:51:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:14,371 INFO L93 Difference]: Finished difference Result 183967 states and 256544 transitions. [2020-12-23 09:51:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:51:14,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-23 09:51:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:14,540 INFO L225 Difference]: With dead ends: 183967 [2020-12-23 09:51:14,682 INFO L226 Difference]: Without dead ends: 122108 [2020-12-23 09:51:14,759 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 09:51:14,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122108 states. [2020-12-23 09:51:21,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122108 to 121968. [2020-12-23 09:51:21,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121968 states. [2020-12-23 09:51:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121968 states to 121968 states and 168000 transitions. [2020-12-23 09:51:21,457 INFO L78 Accepts]: Start accepts. Automaton has 121968 states and 168000 transitions. Word has length 84 [2020-12-23 09:51:21,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:21,458 INFO L481 AbstractCegarLoop]: Abstraction has 121968 states and 168000 transitions. [2020-12-23 09:51:21,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:51:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 121968 states and 168000 transitions. [2020-12-23 09:51:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 09:51:21,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:21,469 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 09:51:21,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 09:51:21,470 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:21,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:21,470 INFO L82 PathProgramCache]: Analyzing trace with hash -663169506, now seen corresponding path program 1 times [2020-12-23 09:51:21,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:21,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108253365] [2020-12-23 09:51:21,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 09:51:21,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108253365] [2020-12-23 09:51:21,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:51:21,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:51:21,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306912945] [2020-12-23 09:51:21,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:51:21,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:21,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:51:21,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:51:21,542 INFO L87 Difference]: Start difference. First operand 121968 states and 168000 transitions. Second operand 6 states. [2020-12-23 09:51:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:32,112 INFO L93 Difference]: Finished difference Result 312492 states and 430482 transitions. [2020-12-23 09:51:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:51:32,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-12-23 09:51:32,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:32,423 INFO L225 Difference]: With dead ends: 312492 [2020-12-23 09:51:32,423 INFO L226 Difference]: Without dead ends: 190560 [2020-12-23 09:51:32,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:51:32,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190560 states. [2020-12-23 09:51:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190560 to 167002. [2020-12-23 09:51:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167002 states. [2020-12-23 09:51:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167002 states to 167002 states and 227792 transitions. [2020-12-23 09:51:42,717 INFO L78 Accepts]: Start accepts. Automaton has 167002 states and 227792 transitions. Word has length 84 [2020-12-23 09:51:42,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:42,717 INFO L481 AbstractCegarLoop]: Abstraction has 167002 states and 227792 transitions. [2020-12-23 09:51:42,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:51:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 167002 states and 227792 transitions. [2020-12-23 09:51:42,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 09:51:42,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:42,735 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 09:51:42,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 09:51:42,735 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:42,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:42,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1365416604, now seen corresponding path program 1 times [2020-12-23 09:51:42,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:42,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969695192] [2020-12-23 09:51:42,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:43,144 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 09:51:43,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969695192] [2020-12-23 09:51:43,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:51:43,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:51:43,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822704544] [2020-12-23 09:51:43,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:51:43,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:43,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:51:43,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:51:43,148 INFO L87 Difference]: Start difference. First operand 167002 states and 227792 transitions. Second operand 6 states. [2020-12-23 09:51:55,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:55,055 INFO L93 Difference]: Finished difference Result 258213 states and 355174 transitions. [2020-12-23 09:51:55,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:51:55,056 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-12-23 09:51:55,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:55,553 INFO L225 Difference]: With dead ends: 258213 [2020-12-23 09:51:55,554 INFO L226 Difference]: Without dead ends: 232325 [2020-12-23 09:51:55,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 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 09:51:55,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232325 states. [2020-12-23 09:52:06,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232325 to 188634. [2020-12-23 09:52:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188634 states. [2020-12-23 09:52:06,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188634 states to 188634 states and 257301 transitions. [2020-12-23 09:52:06,553 INFO L78 Accepts]: Start accepts. Automaton has 188634 states and 257301 transitions. Word has length 84 [2020-12-23 09:52:06,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:52:06,553 INFO L481 AbstractCegarLoop]: Abstraction has 188634 states and 257301 transitions. [2020-12-23 09:52:06,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:52:06,553 INFO L276 IsEmpty]: Start isEmpty. Operand 188634 states and 257301 transitions. [2020-12-23 09:52:06,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 09:52:06,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:52:06,568 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:52:06,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 09:52:06,569 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:52:06,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:52:06,569 INFO L82 PathProgramCache]: Analyzing trace with hash 335470307, now seen corresponding path program 1 times [2020-12-23 09:52:06,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:52:06,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569393315] [2020-12-23 09:52:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:52:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:52:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:52:06,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569393315] [2020-12-23 09:52:06,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:52:06,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:52:06,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670409635] [2020-12-23 09:52:06,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:52:06,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:52:06,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:52:06,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:52:06,932 INFO L87 Difference]: Start difference. First operand 188634 states and 257301 transitions. Second operand 3 states. [2020-12-23 09:52:23,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:52:23,519 INFO L93 Difference]: Finished difference Result 491003 states and 666677 transitions. [2020-12-23 09:52:23,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:52:23,520 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2020-12-23 09:52:23,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:52:24,159 INFO L225 Difference]: With dead ends: 491003 [2020-12-23 09:52:24,160 INFO L226 Difference]: Without dead ends: 306369 [2020-12-23 09:52:24,295 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 09:52:24,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306369 states.