/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.3.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:54:21,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:54:21,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:54:21,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:54:21,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:54:21,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:54:21,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:54:21,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:54:21,920 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:54:21,927 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:54:21,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:54:21,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:54:21,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:54:21,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:54:21,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:54:21,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:54:21,941 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:54:21,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:54:21,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:54:21,974 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:54:21,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:54:21,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:54:21,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:54:21,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:54:21,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:54:21,991 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:54:21,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:54:21,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:54:21,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:54:21,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:54:21,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:54:21,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:54:21,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:54:22,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:54:22,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:54:22,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:54:22,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:54:22,005 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:54:22,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:54:22,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:54:22,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:54:22,007 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 09:54:22,060 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:54:22,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:54:22,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:54:22,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:54:22,066 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:54:22,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:54:22,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:54:22,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:54:22,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:54:22,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:54:22,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:54:22,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:54:22,068 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:54:22,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:54:22,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:54:22,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:54:22,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:54:22,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:54:22,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:54:22,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:54:22,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:54:22,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:54:22,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:54:22,070 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:54:22,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:54:22,071 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:54:22,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:54:22,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:54:22,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:54:22,521 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:54:22,525 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:54:22,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.BOUNDED-6.pals.c [2020-12-23 09:54:22,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/22e1d2729/7776afa8ab5f41dd9b0f4e8ef2919600/FLAGfb675f47d [2020-12-23 09:54:23,228 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:54:23,228 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.BOUNDED-6.pals.c [2020-12-23 09:54:23,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/22e1d2729/7776afa8ab5f41dd9b0f4e8ef2919600/FLAGfb675f47d [2020-12-23 09:54:23,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/22e1d2729/7776afa8ab5f41dd9b0f4e8ef2919600 [2020-12-23 09:54:23,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:54:23,556 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:54:23,558 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:54:23,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:54:23,563 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:54:23,564 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:54:23" (1/1) ... [2020-12-23 09:54:23,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7584fed4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:23, skipping insertion in model container [2020-12-23 09:54:23,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:54:23" (1/1) ... [2020-12-23 09:54:23,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:54:23,604 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[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_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[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,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[~mode3~0,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[~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[~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[~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[~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[~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[~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[~c1~0,] [2020-12-23 09:54:23,819 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.3.ufo.BOUNDED-6.pals.c[5947,5960] [2020-12-23 09:54:23,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:54:23,851 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[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_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[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,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[~mode3~0,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[~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[~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[~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[~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[~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[~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[~c1~0,] [2020-12-23 09:54:23,954 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.3.ufo.BOUNDED-6.pals.c[5947,5960] [2020-12-23 09:54:23,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:54:23,990 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:54:23,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:23 WrapperNode [2020-12-23 09:54:23,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:54:23,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:54:23,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:54:23,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:54:24,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:23" (1/1) ... [2020-12-23 09:54:24,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:23" (1/1) ... [2020-12-23 09:54:24,059 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:54:24,060 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:54:24,060 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:54:24,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:54:24,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:23" (1/1) ... [2020-12-23 09:54:24,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:23" (1/1) ... [2020-12-23 09:54:24,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:23" (1/1) ... [2020-12-23 09:54:24,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:23" (1/1) ... [2020-12-23 09:54:24,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:23" (1/1) ... [2020-12-23 09:54:24,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:23" (1/1) ... [2020-12-23 09:54:24,090 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:23" (1/1) ... [2020-12-23 09:54:24,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:54:24,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:54:24,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:54:24,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:54:24,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:23" (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 09:54:24,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:54:24,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:54:24,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:54:24,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:54:24,934 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:54:24,935 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-23 09:54:24,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:54:24 BoogieIcfgContainer [2020-12-23 09:54:24,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:54:24,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:54:24,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:54:24,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:54:24,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:54:23" (1/3) ... [2020-12-23 09:54:24,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0be7a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:54:24, skipping insertion in model container [2020-12-23 09:54:24,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:23" (2/3) ... [2020-12-23 09:54:24,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0be7a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:54:24, skipping insertion in model container [2020-12-23 09:54:24,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:54:24" (3/3) ... [2020-12-23 09:54:24,947 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c [2020-12-23 09:54:24,955 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:54:24,961 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:54:24,985 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:54:25,017 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:54:25,017 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:54:25,018 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:54:25,018 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:54:25,018 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:54:25,018 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:54:25,018 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:54:25,019 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:54:25,038 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-12-23 09:54:25,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 09:54:25,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:25,046 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] [2020-12-23 09:54:25,047 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:25,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:25,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1133243219, now seen corresponding path program 1 times [2020-12-23 09:54:25,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:25,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530016895] [2020-12-23 09:54:25,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:25,281 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 09:54:25,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530016895] [2020-12-23 09:54:25,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:25,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:54:25,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066335247] [2020-12-23 09:54:25,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 09:54:25,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:25,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 09:54:25,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 09:54:25,307 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2020-12-23 09:54:25,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:25,335 INFO L93 Difference]: Finished difference Result 103 states and 164 transitions. [2020-12-23 09:54:25,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 09:54:25,337 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2020-12-23 09:54:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:25,349 INFO L225 Difference]: With dead ends: 103 [2020-12-23 09:54:25,349 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 09:54:25,353 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 09:54:25,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 09:54:25,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-23 09:54:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 09:54:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 94 transitions. [2020-12-23 09:54:25,398 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 94 transitions. Word has length 25 [2020-12-23 09:54:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:25,399 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 94 transitions. [2020-12-23 09:54:25,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 09:54:25,399 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 94 transitions. [2020-12-23 09:54:25,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 09:54:25,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:25,401 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] [2020-12-23 09:54:25,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:54:25,401 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:25,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:25,403 INFO L82 PathProgramCache]: Analyzing trace with hash 315594769, now seen corresponding path program 1 times [2020-12-23 09:54:25,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:25,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000123516] [2020-12-23 09:54:25,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:25,581 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 09:54:25,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000123516] [2020-12-23 09:54:25,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:25,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:25,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715108667] [2020-12-23 09:54:25,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:25,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:25,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:25,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:25,590 INFO L87 Difference]: Start difference. First operand 58 states and 94 transitions. Second operand 5 states. [2020-12-23 09:54:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:25,736 INFO L93 Difference]: Finished difference Result 134 states and 210 transitions. [2020-12-23 09:54:25,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:54:25,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-12-23 09:54:25,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:25,740 INFO L225 Difference]: With dead ends: 134 [2020-12-23 09:54:25,740 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 09:54:25,741 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 09:54:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 09:54:25,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2020-12-23 09:54:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 09:54:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2020-12-23 09:54:25,752 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 25 [2020-12-23 09:54:25,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:25,752 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2020-12-23 09:54:25,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2020-12-23 09:54:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:54:25,754 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:25,755 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] [2020-12-23 09:54:25,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:54:25,755 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:25,759 INFO L82 PathProgramCache]: Analyzing trace with hash -278543826, now seen corresponding path program 1 times [2020-12-23 09:54:25,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:25,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871468988] [2020-12-23 09:54:25,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:25,921 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 09:54:25,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871468988] [2020-12-23 09:54:25,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:25,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:25,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834146309] [2020-12-23 09:54:25,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:25,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:25,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:25,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:25,928 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand 3 states. [2020-12-23 09:54:25,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:25,982 INFO L93 Difference]: Finished difference Result 124 states and 180 transitions. [2020-12-23 09:54:25,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:25,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-23 09:54:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:25,984 INFO L225 Difference]: With dead ends: 124 [2020-12-23 09:54:25,985 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 09:54:25,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:25,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 09:54:25,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-12-23 09:54:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 09:54:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 122 transitions. [2020-12-23 09:54:25,998 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 122 transitions. Word has length 40 [2020-12-23 09:54:25,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:25,999 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 122 transitions. [2020-12-23 09:54:25,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 122 transitions. [2020-12-23 09:54:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:54:26,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:26,001 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] [2020-12-23 09:54:26,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 09:54:26,001 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:26,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1401070434, now seen corresponding path program 1 times [2020-12-23 09:54:26,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:26,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316701167] [2020-12-23 09:54:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:26,160 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 09:54:26,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316701167] [2020-12-23 09:54:26,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:26,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:26,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969870793] [2020-12-23 09:54:26,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:26,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:26,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:26,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:26,169 INFO L87 Difference]: Start difference. First operand 86 states and 122 transitions. Second operand 3 states. [2020-12-23 09:54:26,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:26,226 INFO L93 Difference]: Finished difference Result 202 states and 302 transitions. [2020-12-23 09:54:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:26,227 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-23 09:54:26,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:26,229 INFO L225 Difference]: With dead ends: 202 [2020-12-23 09:54:26,229 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 09:54:26,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:26,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 09:54:26,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-12-23 09:54:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 09:54:26,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 199 transitions. [2020-12-23 09:54:26,251 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 199 transitions. Word has length 40 [2020-12-23 09:54:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:26,252 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 199 transitions. [2020-12-23 09:54:26,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 199 transitions. [2020-12-23 09:54:26,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:54:26,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:26,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:26,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 09:54:26,255 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:26,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:26,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1738863576, now seen corresponding path program 1 times [2020-12-23 09:54:26,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:26,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235063156] [2020-12-23 09:54:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:26,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:26,322 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 09:54:26,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235063156] [2020-12-23 09:54:26,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:26,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:26,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114087493] [2020-12-23 09:54:26,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:26,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:26,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:26,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:26,326 INFO L87 Difference]: Start difference. First operand 136 states and 199 transitions. Second operand 3 states. [2020-12-23 09:54:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:26,384 INFO L93 Difference]: Finished difference Result 340 states and 513 transitions. [2020-12-23 09:54:26,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:26,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-23 09:54:26,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:26,388 INFO L225 Difference]: With dead ends: 340 [2020-12-23 09:54:26,388 INFO L226 Difference]: Without dead ends: 226 [2020-12-23 09:54:26,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:26,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-23 09:54:26,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2020-12-23 09:54:26,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-23 09:54:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 331 transitions. [2020-12-23 09:54:26,426 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 331 transitions. Word has length 40 [2020-12-23 09:54:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:26,426 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 331 transitions. [2020-12-23 09:54:26,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:26,427 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 331 transitions. [2020-12-23 09:54:26,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:54:26,428 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:26,428 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] [2020-12-23 09:54:26,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 09:54:26,429 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:26,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:26,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1338118322, now seen corresponding path program 1 times [2020-12-23 09:54:26,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:26,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34678845] [2020-12-23 09:54:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:26,564 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 09:54:26,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34678845] [2020-12-23 09:54:26,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:26,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:26,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725695264] [2020-12-23 09:54:26,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:54:26,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:26,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:54:26,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:54:26,568 INFO L87 Difference]: Start difference. First operand 224 states and 331 transitions. Second operand 6 states. [2020-12-23 09:54:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:26,777 INFO L93 Difference]: Finished difference Result 426 states and 640 transitions. [2020-12-23 09:54:26,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:54:26,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-12-23 09:54:26,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:26,781 INFO L225 Difference]: With dead ends: 426 [2020-12-23 09:54:26,781 INFO L226 Difference]: Without dead ends: 224 [2020-12-23 09:54:26,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:54:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-23 09:54:26,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2020-12-23 09:54:26,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-23 09:54:26,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 327 transitions. [2020-12-23 09:54:26,839 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 327 transitions. Word has length 40 [2020-12-23 09:54:26,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:26,839 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 327 transitions. [2020-12-23 09:54:26,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:54:26,840 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 327 transitions. [2020-12-23 09:54:26,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:54:26,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:26,841 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] [2020-12-23 09:54:26,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 09:54:26,842 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:26,843 INFO L82 PathProgramCache]: Analyzing trace with hash -317049968, now seen corresponding path program 1 times [2020-12-23 09:54:26,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:26,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027270349] [2020-12-23 09:54:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:26,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:26,989 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 09:54:26,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027270349] [2020-12-23 09:54:26,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:26,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:26,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142169699] [2020-12-23 09:54:26,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:26,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:26,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:27,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:27,000 INFO L87 Difference]: Start difference. First operand 224 states and 327 transitions. Second operand 5 states. [2020-12-23 09:54:27,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:27,184 INFO L93 Difference]: Finished difference Result 1234 states and 1852 transitions. [2020-12-23 09:54:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:54:27,185 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-23 09:54:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:27,192 INFO L225 Difference]: With dead ends: 1234 [2020-12-23 09:54:27,192 INFO L226 Difference]: Without dead ends: 1032 [2020-12-23 09:54:27,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:54:27,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2020-12-23 09:54:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 424. [2020-12-23 09:54:27,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-12-23 09:54:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 615 transitions. [2020-12-23 09:54:27,240 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 615 transitions. Word has length 40 [2020-12-23 09:54:27,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:27,240 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 615 transitions. [2020-12-23 09:54:27,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 615 transitions. [2020-12-23 09:54:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 09:54:27,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:27,242 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] [2020-12-23 09:54:27,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 09:54:27,243 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:27,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:27,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1091548472, now seen corresponding path program 1 times [2020-12-23 09:54:27,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:27,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347185618] [2020-12-23 09:54:27,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:27,405 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 09:54:27,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347185618] [2020-12-23 09:54:27,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:27,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:27,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825147156] [2020-12-23 09:54:27,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:27,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:27,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:27,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:27,418 INFO L87 Difference]: Start difference. First operand 424 states and 615 transitions. Second operand 5 states. [2020-12-23 09:54:27,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:27,522 INFO L93 Difference]: Finished difference Result 1030 states and 1514 transitions. [2020-12-23 09:54:27,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:54:27,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-23 09:54:27,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:27,527 INFO L225 Difference]: With dead ends: 1030 [2020-12-23 09:54:27,527 INFO L226 Difference]: Without dead ends: 628 [2020-12-23 09:54:27,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:27,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2020-12-23 09:54:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 424. [2020-12-23 09:54:27,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-12-23 09:54:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 607 transitions. [2020-12-23 09:54:27,576 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 607 transitions. Word has length 42 [2020-12-23 09:54:27,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:27,576 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 607 transitions. [2020-12-23 09:54:27,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:27,577 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 607 transitions. [2020-12-23 09:54:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 09:54:27,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:27,580 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] [2020-12-23 09:54:27,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 09:54:27,580 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:27,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:27,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1158041984, now seen corresponding path program 1 times [2020-12-23 09:54:27,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:27,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023897378] [2020-12-23 09:54:27,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:27,660 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 09:54:27,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023897378] [2020-12-23 09:54:27,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:27,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:27,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577200564] [2020-12-23 09:54:27,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:27,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:27,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:27,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:27,666 INFO L87 Difference]: Start difference. First operand 424 states and 607 transitions. Second operand 3 states. [2020-12-23 09:54:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:27,734 INFO L93 Difference]: Finished difference Result 1010 states and 1451 transitions. [2020-12-23 09:54:27,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:27,735 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-12-23 09:54:27,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:27,740 INFO L225 Difference]: With dead ends: 1010 [2020-12-23 09:54:27,740 INFO L226 Difference]: Without dead ends: 608 [2020-12-23 09:54:27,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2020-12-23 09:54:27,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 606. [2020-12-23 09:54:27,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2020-12-23 09:54:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 853 transitions. [2020-12-23 09:54:27,792 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 853 transitions. Word has length 42 [2020-12-23 09:54:27,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:27,793 INFO L481 AbstractCegarLoop]: Abstraction has 606 states and 853 transitions. [2020-12-23 09:54:27,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:27,793 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 853 transitions. [2020-12-23 09:54:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 09:54:27,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:27,796 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] [2020-12-23 09:54:27,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 09:54:27,797 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:27,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:27,797 INFO L82 PathProgramCache]: Analyzing trace with hash 107012533, now seen corresponding path program 1 times [2020-12-23 09:54:27,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:27,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606606944] [2020-12-23 09:54:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:27,911 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 09:54:27,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606606944] [2020-12-23 09:54:27,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:27,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:27,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667207907] [2020-12-23 09:54:27,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:27,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:27,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:27,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:27,914 INFO L87 Difference]: Start difference. First operand 606 states and 853 transitions. Second operand 5 states. [2020-12-23 09:54:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:28,056 INFO L93 Difference]: Finished difference Result 1129 states and 1572 transitions. [2020-12-23 09:54:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 09:54:28,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-23 09:54:28,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:28,065 INFO L225 Difference]: With dead ends: 1129 [2020-12-23 09:54:28,065 INFO L226 Difference]: Without dead ends: 1127 [2020-12-23 09:54:28,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:54:28,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2020-12-23 09:54:28,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 654. [2020-12-23 09:54:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2020-12-23 09:54:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 897 transitions. [2020-12-23 09:54:28,145 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 897 transitions. Word has length 43 [2020-12-23 09:54:28,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:28,146 INFO L481 AbstractCegarLoop]: Abstraction has 654 states and 897 transitions. [2020-12-23 09:54:28,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:28,146 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 897 transitions. [2020-12-23 09:54:28,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 09:54:28,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:28,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:28,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 09:54:28,149 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:28,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1027002802, now seen corresponding path program 1 times [2020-12-23 09:54:28,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:28,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315485066] [2020-12-23 09:54:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:28,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 09:54:28,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315485066] [2020-12-23 09:54:28,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:28,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:28,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022929793] [2020-12-23 09:54:28,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:28,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:28,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:28,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:28,232 INFO L87 Difference]: Start difference. First operand 654 states and 897 transitions. Second operand 5 states. [2020-12-23 09:54:28,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:28,472 INFO L93 Difference]: Finished difference Result 2682 states and 3697 transitions. [2020-12-23 09:54:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:54:28,473 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-23 09:54:28,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:28,484 INFO L225 Difference]: With dead ends: 2682 [2020-12-23 09:54:28,484 INFO L226 Difference]: Without dead ends: 2052 [2020-12-23 09:54:28,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:54:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2020-12-23 09:54:28,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1282. [2020-12-23 09:54:28,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2020-12-23 09:54:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1757 transitions. [2020-12-23 09:54:28,638 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1757 transitions. Word has length 63 [2020-12-23 09:54:28,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:28,638 INFO L481 AbstractCegarLoop]: Abstraction has 1282 states and 1757 transitions. [2020-12-23 09:54:28,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:28,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1757 transitions. [2020-12-23 09:54:28,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 09:54:28,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:28,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:28,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 09:54:28,641 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:28,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:28,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1499181678, now seen corresponding path program 1 times [2020-12-23 09:54:28,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:28,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786102834] [2020-12-23 09:54:28,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 09:54:28,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786102834] [2020-12-23 09:54:28,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:28,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:28,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788718590] [2020-12-23 09:54:28,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:28,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:28,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:28,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:28,757 INFO L87 Difference]: Start difference. First operand 1282 states and 1757 transitions. Second operand 5 states. [2020-12-23 09:54:29,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:29,006 INFO L93 Difference]: Finished difference Result 3310 states and 4557 transitions. [2020-12-23 09:54:29,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:54:29,007 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-23 09:54:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:29,026 INFO L225 Difference]: With dead ends: 3310 [2020-12-23 09:54:29,027 INFO L226 Difference]: Without dead ends: 2680 [2020-12-23 09:54:29,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:29,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2020-12-23 09:54:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2226. [2020-12-23 09:54:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2226 states. [2020-12-23 09:54:29,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3037 transitions. [2020-12-23 09:54:29,269 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3037 transitions. Word has length 63 [2020-12-23 09:54:29,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:29,270 INFO L481 AbstractCegarLoop]: Abstraction has 2226 states and 3037 transitions. [2020-12-23 09:54:29,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:29,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3037 transitions. [2020-12-23 09:54:29,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 09:54:29,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:29,272 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:29,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 09:54:29,272 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:29,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1664145778, now seen corresponding path program 1 times [2020-12-23 09:54:29,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:29,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937353670] [2020-12-23 09:54:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:54:29,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937353670] [2020-12-23 09:54:29,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:29,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:29,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518908033] [2020-12-23 09:54:29,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:29,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:29,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:29,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:29,356 INFO L87 Difference]: Start difference. First operand 2226 states and 3037 transitions. Second operand 5 states. [2020-12-23 09:54:29,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:29,672 INFO L93 Difference]: Finished difference Result 3758 states and 5177 transitions. [2020-12-23 09:54:29,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:54:29,673 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-23 09:54:29,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:29,689 INFO L225 Difference]: With dead ends: 3758 [2020-12-23 09:54:29,689 INFO L226 Difference]: Without dead ends: 3308 [2020-12-23 09:54:29,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:29,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3308 states. [2020-12-23 09:54:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3308 to 2674. [2020-12-23 09:54:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2674 states. [2020-12-23 09:54:29,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3661 transitions. [2020-12-23 09:54:29,934 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3661 transitions. Word has length 63 [2020-12-23 09:54:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:29,938 INFO L481 AbstractCegarLoop]: Abstraction has 2674 states and 3661 transitions. [2020-12-23 09:54:29,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3661 transitions. [2020-12-23 09:54:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 09:54:29,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:29,943 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] [2020-12-23 09:54:29,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 09:54:29,943 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:29,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:29,944 INFO L82 PathProgramCache]: Analyzing trace with hash -229876224, now seen corresponding path program 1 times [2020-12-23 09:54:29,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:29,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90525050] [2020-12-23 09:54:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:54:30,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90525050] [2020-12-23 09:54:30,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489699441] [2020-12-23 09:54:30,084 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 09:54:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:30,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 09:54:30,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:54:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:54:30,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:54:30,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2020-12-23 09:54:30,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160521102] [2020-12-23 09:54:30,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 09:54:30,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:30,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 09:54:30,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:54:30,501 INFO L87 Difference]: Start difference. First operand 2674 states and 3661 transitions. Second operand 7 states. [2020-12-23 09:54:31,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:31,079 INFO L93 Difference]: Finished difference Result 6353 states and 8781 transitions. [2020-12-23 09:54:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:54:31,080 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-23 09:54:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:31,101 INFO L225 Difference]: With dead ends: 6353 [2020-12-23 09:54:31,101 INFO L226 Difference]: Without dead ends: 4335 [2020-12-23 09:54:31,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:54:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2020-12-23 09:54:31,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 4286. [2020-12-23 09:54:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4286 states. [2020-12-23 09:54:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 5805 transitions. [2020-12-23 09:54:31,506 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 5805 transitions. Word has length 64 [2020-12-23 09:54:31,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:31,507 INFO L481 AbstractCegarLoop]: Abstraction has 4286 states and 5805 transitions. [2020-12-23 09:54:31,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 09:54:31,507 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 5805 transitions. [2020-12-23 09:54:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:54:31,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:31,508 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] [2020-12-23 09:54:31,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 09:54:31,723 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:31,724 INFO L82 PathProgramCache]: Analyzing trace with hash -456421882, now seen corresponding path program 1 times [2020-12-23 09:54:31,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:31,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105102928] [2020-12-23 09:54:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:32,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105102928] [2020-12-23 09:54:32,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716492973] [2020-12-23 09:54:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:54:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:32,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 09:54:32,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:54:32,363 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:54:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:32,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:54:32,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 09:54:32,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818314419] [2020-12-23 09:54:32,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:54:32,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:32,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:54:32,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:54:32,649 INFO L87 Difference]: Start difference. First operand 4286 states and 5805 transitions. Second operand 17 states. [2020-12-23 09:54:35,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:35,149 INFO L93 Difference]: Finished difference Result 16283 states and 21903 transitions. [2020-12-23 09:54:35,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 09:54:35,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-12-23 09:54:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:35,213 INFO L225 Difference]: With dead ends: 16283 [2020-12-23 09:54:35,213 INFO L226 Difference]: Without dead ends: 12021 [2020-12-23 09:54:35,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 09:54:35,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12021 states. [2020-12-23 09:54:36,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12021 to 7790. [2020-12-23 09:54:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7790 states. [2020-12-23 09:54:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7790 states to 7790 states and 10457 transitions. [2020-12-23 09:54:36,122 INFO L78 Accepts]: Start accepts. Automaton has 7790 states and 10457 transitions. Word has length 65 [2020-12-23 09:54:36,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:36,123 INFO L481 AbstractCegarLoop]: Abstraction has 7790 states and 10457 transitions. [2020-12-23 09:54:36,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:54:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand 7790 states and 10457 transitions. [2020-12-23 09:54:36,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:54:36,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:36,131 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] [2020-12-23 09:54:36,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 09:54:36,347 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:36,348 INFO L82 PathProgramCache]: Analyzing trace with hash 550341158, now seen corresponding path program 1 times [2020-12-23 09:54:36,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:36,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097442649] [2020-12-23 09:54:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:36,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097442649] [2020-12-23 09:54:36,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332762816] [2020-12-23 09:54:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:54:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:36,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 09:54:36,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:54:36,891 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:54:37,064 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2020-12-23 09:54:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:37,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:54:37,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 09:54:37,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825266042] [2020-12-23 09:54:37,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:54:37,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:37,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:54:37,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:54:37,273 INFO L87 Difference]: Start difference. First operand 7790 states and 10457 transitions. Second operand 17 states. [2020-12-23 09:54:40,589 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-23 09:54:41,022 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-23 09:54:41,924 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-23 09:54:42,829 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-23 09:54:53,998 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-23 09:54:55,200 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-23 09:54:56,472 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-23 09:55:01,612 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-12-23 09:55:02,348 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-23 09:55:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:06,093 INFO L93 Difference]: Finished difference Result 157983 states and 209246 transitions. [2020-12-23 09:55:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2020-12-23 09:55:06,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-12-23 09:55:06,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:06,564 INFO L225 Difference]: With dead ends: 157983 [2020-12-23 09:55:06,564 INFO L226 Difference]: Without dead ends: 150217 [2020-12-23 09:55:06,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20542 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=5056, Invalid=42686, Unknown=0, NotChecked=0, Total=47742 [2020-12-23 09:55:06,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150217 states. [2020-12-23 09:55:12,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150217 to 41241. [2020-12-23 09:55:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41241 states. [2020-12-23 09:55:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41241 states to 41241 states and 55254 transitions. [2020-12-23 09:55:12,105 INFO L78 Accepts]: Start accepts. Automaton has 41241 states and 55254 transitions. Word has length 65 [2020-12-23 09:55:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:12,106 INFO L481 AbstractCegarLoop]: Abstraction has 41241 states and 55254 transitions. [2020-12-23 09:55:12,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:55:12,106 INFO L276 IsEmpty]: Start isEmpty. Operand 41241 states and 55254 transitions. [2020-12-23 09:55:12,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:55:12,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:12,108 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:55:12,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 09:55:12,317 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:12,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:12,321 INFO L82 PathProgramCache]: Analyzing trace with hash 625513838, now seen corresponding path program 1 times [2020-12-23 09:55:12,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:12,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144074980] [2020-12-23 09:55:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:12,529 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 09:55:12,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144074980] [2020-12-23 09:55:12,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:55:12,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:55:12,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717125669] [2020-12-23 09:55:12,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:55:12,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:12,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:55:12,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:55:12,532 INFO L87 Difference]: Start difference. First operand 41241 states and 55254 transitions. Second operand 3 states. [2020-12-23 09:55:16,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:16,553 INFO L93 Difference]: Finished difference Result 82460 states and 110485 transitions. [2020-12-23 09:55:16,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:55:16,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-23 09:55:16,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:16,642 INFO L225 Difference]: With dead ends: 82460 [2020-12-23 09:55:16,643 INFO L226 Difference]: Without dead ends: 41243 [2020-12-23 09:55:16,686 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 09:55:16,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41243 states. [2020-12-23 09:55:20,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41243 to 40353. [2020-12-23 09:55:20,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40353 states. [2020-12-23 09:55:20,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40353 states to 40353 states and 53034 transitions. [2020-12-23 09:55:20,384 INFO L78 Accepts]: Start accepts. Automaton has 40353 states and 53034 transitions. Word has length 65 [2020-12-23 09:55:20,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:20,384 INFO L481 AbstractCegarLoop]: Abstraction has 40353 states and 53034 transitions. [2020-12-23 09:55:20,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:55:20,385 INFO L276 IsEmpty]: Start isEmpty. Operand 40353 states and 53034 transitions. [2020-12-23 09:55:20,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:55:20,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:20,390 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:55:20,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 09:55:20,391 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:20,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:20,393 INFO L82 PathProgramCache]: Analyzing trace with hash -621993778, now seen corresponding path program 1 times [2020-12-23 09:55:20,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:20,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672551574] [2020-12-23 09:55:20,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:20,455 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 09:55:20,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672551574] [2020-12-23 09:55:20,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:55:20,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:55:20,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198333665] [2020-12-23 09:55:20,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:55:20,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:20,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:55:20,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:55:20,459 INFO L87 Difference]: Start difference. First operand 40353 states and 53034 transitions. Second operand 3 states. [2020-12-23 09:55:22,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:22,366 INFO L93 Difference]: Finished difference Result 63110 states and 82863 transitions. [2020-12-23 09:55:22,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:55:22,367 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-23 09:55:22,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:22,402 INFO L225 Difference]: With dead ends: 63110 [2020-12-23 09:55:22,403 INFO L226 Difference]: Without dead ends: 22781 [2020-12-23 09:55:22,432 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 09:55:22,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22781 states. [2020-12-23 09:55:24,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22781 to 22779. [2020-12-23 09:55:24,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22779 states. [2020-12-23 09:55:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22779 states to 22779 states and 29246 transitions. [2020-12-23 09:55:24,568 INFO L78 Accepts]: Start accepts. Automaton has 22779 states and 29246 transitions. Word has length 65 [2020-12-23 09:55:24,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:24,568 INFO L481 AbstractCegarLoop]: Abstraction has 22779 states and 29246 transitions. [2020-12-23 09:55:24,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:55:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 22779 states and 29246 transitions. [2020-12-23 09:55:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:55:24,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:24,570 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:55:24,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 09:55:24,570 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:24,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1642879954, now seen corresponding path program 1 times [2020-12-23 09:55:24,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:24,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253284410] [2020-12-23 09:55:24,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:24,628 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 09:55:24,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253284410] [2020-12-23 09:55:24,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:55:24,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:55:24,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507595123] [2020-12-23 09:55:24,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:55:24,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:24,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:55:24,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:55:24,635 INFO L87 Difference]: Start difference. First operand 22779 states and 29246 transitions. Second operand 3 states. [2020-12-23 09:55:25,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:25,548 INFO L93 Difference]: Finished difference Result 31656 states and 40694 transitions. [2020-12-23 09:55:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:55:25,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-23 09:55:25,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:25,557 INFO L225 Difference]: With dead ends: 31656 [2020-12-23 09:55:25,557 INFO L226 Difference]: Without dead ends: 8901 [2020-12-23 09:55:25,569 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 09:55:25,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8901 states. [2020-12-23 09:55:26,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8901 to 8251. [2020-12-23 09:55:26,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8251 states. [2020-12-23 09:55:26,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8251 states to 8251 states and 10504 transitions. [2020-12-23 09:55:26,192 INFO L78 Accepts]: Start accepts. Automaton has 8251 states and 10504 transitions. Word has length 65 [2020-12-23 09:55:26,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:26,193 INFO L481 AbstractCegarLoop]: Abstraction has 8251 states and 10504 transitions. [2020-12-23 09:55:26,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:55:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 8251 states and 10504 transitions. [2020-12-23 09:55:26,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:55:26,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:26,195 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:55:26,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 09:55:26,195 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:26,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:26,195 INFO L82 PathProgramCache]: Analyzing trace with hash 224764346, now seen corresponding path program 1 times [2020-12-23 09:55:26,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:26,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283288170] [2020-12-23 09:55:26,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:26,259 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 09:55:26,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283288170] [2020-12-23 09:55:26,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:55:26,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:55:26,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750180009] [2020-12-23 09:55:26,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:55:26,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:26,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:55:26,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:55:26,261 INFO L87 Difference]: Start difference. First operand 8251 states and 10504 transitions. Second operand 6 states. [2020-12-23 09:55:26,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:26,969 INFO L93 Difference]: Finished difference Result 15261 states and 19469 transitions. [2020-12-23 09:55:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:55:26,970 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-23 09:55:26,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:26,976 INFO L225 Difference]: With dead ends: 15261 [2020-12-23 09:55:26,976 INFO L226 Difference]: Without dead ends: 7073 [2020-12-23 09:55:26,981 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 09:55:26,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7073 states. [2020-12-23 09:55:27,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7073 to 7073. [2020-12-23 09:55:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7073 states. [2020-12-23 09:55:27,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7073 states to 7073 states and 8855 transitions. [2020-12-23 09:55:27,522 INFO L78 Accepts]: Start accepts. Automaton has 7073 states and 8855 transitions. Word has length 65 [2020-12-23 09:55:27,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:27,522 INFO L481 AbstractCegarLoop]: Abstraction has 7073 states and 8855 transitions. [2020-12-23 09:55:27,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:55:27,522 INFO L276 IsEmpty]: Start isEmpty. Operand 7073 states and 8855 transitions. [2020-12-23 09:55:27,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:55:27,524 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:27,524 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:55:27,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-23 09:55:27,524 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:27,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:27,525 INFO L82 PathProgramCache]: Analyzing trace with hash 67059962, now seen corresponding path program 1 times [2020-12-23 09:55:27,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:27,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824815701] [2020-12-23 09:55:27,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:55:27,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824815701] [2020-12-23 09:55:27,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:55:27,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:55:27,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679721375] [2020-12-23 09:55:27,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 09:55:27,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:27,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 09:55:27,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:55:27,621 INFO L87 Difference]: Start difference. First operand 7073 states and 8855 transitions. Second operand 7 states. [2020-12-23 09:55:28,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:28,233 INFO L93 Difference]: Finished difference Result 13117 states and 16497 transitions. [2020-12-23 09:55:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:55:28,234 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-12-23 09:55:28,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:28,240 INFO L225 Difference]: With dead ends: 13117 [2020-12-23 09:55:28,240 INFO L226 Difference]: Without dead ends: 6155 [2020-12-23 09:55:28,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:55:28,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6155 states. [2020-12-23 09:55:28,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6155 to 6153. [2020-12-23 09:55:28,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6153 states. [2020-12-23 09:55:28,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 7699 transitions. [2020-12-23 09:55:28,805 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 7699 transitions. Word has length 65 [2020-12-23 09:55:28,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:28,806 INFO L481 AbstractCegarLoop]: Abstraction has 6153 states and 7699 transitions. [2020-12-23 09:55:28,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 09:55:28,806 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 7699 transitions. [2020-12-23 09:55:28,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 09:55:28,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:28,807 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:55:28,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 09:55:28,807 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:28,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:28,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1467200301, now seen corresponding path program 1 times [2020-12-23 09:55:28,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:28,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631674530] [2020-12-23 09:55:28,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:29,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631674530] [2020-12-23 09:55:29,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27354777] [2020-12-23 09:55:29,903 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:55:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:30,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 09:55:30,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:55:30,456 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 09:55:30,876 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 46 [2020-12-23 09:55:31,493 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-23 09:55:31,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:31,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:55:31,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-12-23 09:55:31,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459005453] [2020-12-23 09:55:31,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 09:55:31,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:31,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 09:55:31,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 09:55:31,547 INFO L87 Difference]: Start difference. First operand 6153 states and 7699 transitions. Second operand 33 states. [2020-12-23 09:55:31,946 WARN L197 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-12-23 09:55:33,317 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-12-23 09:55:33,523 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-23 09:55:33,814 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-12-23 09:55:34,093 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-12-23 09:55:34,494 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-12-23 09:55:35,044 WARN L197 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2020-12-23 09:55:35,509 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2020-12-23 09:55:35,950 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2020-12-23 09:55:36,365 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-12-23 09:55:36,826 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-23 09:55:37,269 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-12-23 09:55:37,623 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-12-23 09:55:37,996 WARN L197 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-12-23 09:55:38,391 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-12-23 09:55:38,717 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-12-23 09:55:39,192 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-12-23 09:55:39,492 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-12-23 09:55:39,761 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-23 09:55:40,141 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-12-23 09:55:40,486 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-12-23 09:55:40,844 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-12-23 09:55:41,281 WARN L197 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-12-23 09:55:41,535 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-23 09:55:41,943 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-12-23 09:55:42,477 WARN L197 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-12-23 09:55:43,116 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2020-12-23 09:55:43,393 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-12-23 09:55:43,842 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-12-23 09:55:44,108 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-23 09:55:44,505 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-23 09:55:44,925 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-12-23 09:55:45,239 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-12-23 09:55:45,668 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-23 09:55:45,875 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-23 09:55:46,171 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-23 09:55:46,515 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-12-23 09:55:46,892 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-12-23 09:55:47,307 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-12-23 09:55:47,952 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-23 09:55:48,362 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-23 09:55:50,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:50,776 INFO L93 Difference]: Finished difference Result 21273 states and 26683 transitions. [2020-12-23 09:55:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 09:55:50,779 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2020-12-23 09:55:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:50,799 INFO L225 Difference]: With dead ends: 21273 [2020-12-23 09:55:50,799 INFO L226 Difference]: Without dead ends: 18044 [2020-12-23 09:55:50,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=1342, Invalid=6848, Unknown=0, NotChecked=0, Total=8190 [2020-12-23 09:55:50,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18044 states. [2020-12-23 09:55:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18044 to 8655. [2020-12-23 09:55:51,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8655 states. [2020-12-23 09:55:51,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8655 states to 8655 states and 10815 transitions. [2020-12-23 09:55:51,763 INFO L78 Accepts]: Start accepts. Automaton has 8655 states and 10815 transitions. Word has length 66 [2020-12-23 09:55:51,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:51,763 INFO L481 AbstractCegarLoop]: Abstraction has 8655 states and 10815 transitions. [2020-12-23 09:55:51,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 09:55:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 8655 states and 10815 transitions. [2020-12-23 09:55:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 09:55:51,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:51,764 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:55:51,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:55:51,965 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:51,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:51,967 INFO L82 PathProgramCache]: Analyzing trace with hash 395112077, now seen corresponding path program 1 times [2020-12-23 09:55:51,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:51,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426895940] [2020-12-23 09:55:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:52,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426895940] [2020-12-23 09:55:52,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760147017] [2020-12-23 09:55:52,968 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:55:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:53,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 09:55:53,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:55:53,513 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 09:55:53,976 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 34 [2020-12-23 09:55:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:54,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:55:54,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-12-23 09:55:54,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511283220] [2020-12-23 09:55:54,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 09:55:54,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:54,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 09:55:54,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 09:55:54,638 INFO L87 Difference]: Start difference. First operand 8655 states and 10815 transitions. Second operand 33 states. [2020-12-23 09:55:54,873 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-23 09:55:55,928 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-23 09:55:56,275 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-23 09:55:56,704 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-12-23 09:55:57,260 WARN L197 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-12-23 09:55:57,824 WARN L197 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-12-23 09:55:58,535 WARN L197 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2020-12-23 09:55:59,251 WARN L197 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2020-12-23 09:55:59,680 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-23 09:56:00,138 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-23 09:56:00,583 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-23 09:56:00,978 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2020-12-23 09:56:01,356 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-12-23 09:56:01,942 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-12-23 09:56:02,269 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-23 09:56:02,576 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-23 09:56:02,978 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-12-23 09:56:03,362 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-23 09:56:04,704 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-23 09:56:05,040 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-12-23 09:56:05,343 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-12-23 09:56:05,695 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-12-23 09:56:06,287 WARN L197 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-23 09:56:06,960 WARN L197 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2020-12-23 09:56:07,535 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-23 09:56:08,251 WARN L197 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-12-23 09:56:08,476 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-23 09:56:08,758 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-23 09:56:09,497 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-23 09:56:09,790 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-12-23 09:56:10,138 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-12-23 09:56:10,540 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2020-12-23 09:56:10,944 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-12-23 09:56:11,970 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-23 09:56:12,429 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-12-23 09:56:13,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:56:13,732 INFO L93 Difference]: Finished difference Result 20993 states and 26718 transitions. [2020-12-23 09:56:13,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 09:56:13,734 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2020-12-23 09:56:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:56:13,755 INFO L225 Difference]: With dead ends: 20993 [2020-12-23 09:56:13,755 INFO L226 Difference]: Without dead ends: 16934 [2020-12-23 09:56:13,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=999, Invalid=5163, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 09:56:13,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16934 states. [2020-12-23 09:56:14,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16934 to 7122. [2020-12-23 09:56:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7122 states. [2020-12-23 09:56:14,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7122 states to 7122 states and 8908 transitions. [2020-12-23 09:56:14,662 INFO L78 Accepts]: Start accepts. Automaton has 7122 states and 8908 transitions. Word has length 66 [2020-12-23 09:56:14,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:56:14,662 INFO L481 AbstractCegarLoop]: Abstraction has 7122 states and 8908 transitions. [2020-12-23 09:56:14,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 09:56:14,663 INFO L276 IsEmpty]: Start isEmpty. Operand 7122 states and 8908 transitions. [2020-12-23 09:56:14,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 09:56:14,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:56:14,663 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] [2020-12-23 09:56:14,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 09:56:14,864 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:56:14,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:56:14,865 INFO L82 PathProgramCache]: Analyzing trace with hash 855365469, now seen corresponding path program 1 times [2020-12-23 09:56:14,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:56:14,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069493234] [2020-12-23 09:56:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:56:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:56:16,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:56:16,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069493234] [2020-12-23 09:56:16,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727501911] [2020-12-23 09:56:16,147 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:56:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:56:16,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 09:56:16,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:56:16,809 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 09:56:17,319 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-12-23 09:56:18,094 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-12-23 09:56:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:56:18,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:56:18,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 32 [2020-12-23 09:56:18,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439643401] [2020-12-23 09:56:18,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 09:56:18,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:56:18,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 09:56:18,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2020-12-23 09:56:18,159 INFO L87 Difference]: Start difference. First operand 7122 states and 8908 transitions. Second operand 32 states. [2020-12-23 09:56:18,577 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-12-23 09:56:19,574 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2020-12-23 09:56:19,859 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2020-12-23 09:56:20,140 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-12-23 09:56:20,429 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-12-23 09:56:20,799 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-12-23 09:56:21,414 WARN L197 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2020-12-23 09:56:22,111 WARN L197 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2020-12-23 09:56:22,780 WARN L197 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2020-12-23 09:56:23,302 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-12-23 09:56:23,828 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-12-23 09:56:24,386 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-12-23 09:56:24,855 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-12-23 09:56:25,273 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-12-23 09:56:25,958 WARN L197 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2020-12-23 09:56:26,431 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-23 09:56:26,877 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-12-23 09:56:27,240 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-23 09:56:27,600 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-23 09:56:28,168 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-12-23 09:56:28,762 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-23 09:56:29,175 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-23 09:56:29,704 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-12-23 09:56:30,188 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-12-23 09:56:31,290 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-12-23 09:56:31,884 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2020-12-23 09:56:32,481 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-12-23 09:56:33,122 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2020-12-23 09:56:33,779 WARN L197 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-12-23 09:56:34,130 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-12-23 09:56:34,756 WARN L197 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 91 [2020-12-23 09:56:35,457 WARN L197 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2020-12-23 09:56:35,860 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-23 09:56:36,735 WARN L197 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-12-23 09:56:37,233 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-12-23 09:56:38,405 WARN L197 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2020-12-23 09:56:39,015 WARN L197 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-23 09:56:39,498 WARN L197 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2020-12-23 09:56:41,235 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-12-23 09:56:42,381 WARN L197 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-12-23 09:56:43,338 WARN L197 SmtUtils]: Spent 663.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2020-12-23 09:56:44,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:56:44,877 INFO L93 Difference]: Finished difference Result 21358 states and 27102 transitions. [2020-12-23 09:56:44,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 09:56:44,880 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 67 [2020-12-23 09:56:44,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:56:44,901 INFO L225 Difference]: With dead ends: 21358 [2020-12-23 09:56:44,901 INFO L226 Difference]: Without dead ends: 16499 [2020-12-23 09:56:44,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=1062, Invalid=5100, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 09:56:44,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16499 states. [2020-12-23 09:56:45,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16499 to 6110. [2020-12-23 09:56:45,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6110 states. [2020-12-23 09:56:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6110 states to 6110 states and 7674 transitions. [2020-12-23 09:56:45,931 INFO L78 Accepts]: Start accepts. Automaton has 6110 states and 7674 transitions. Word has length 67 [2020-12-23 09:56:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:56:45,931 INFO L481 AbstractCegarLoop]: Abstraction has 6110 states and 7674 transitions. [2020-12-23 09:56:45,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 09:56:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 6110 states and 7674 transitions. [2020-12-23 09:56:45,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 09:56:45,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:56:45,935 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:56:46,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:56:46,150 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:56:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:56:46,151 INFO L82 PathProgramCache]: Analyzing trace with hash 455078728, now seen corresponding path program 1 times [2020-12-23 09:56:46,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:56:46,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831365535] [2020-12-23 09:56:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:56:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:56:46,663 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 18 [2020-12-23 09:56:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 22 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:56:46,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831365535] [2020-12-23 09:56:46,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268903514] [2020-12-23 09:56:46,807 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:56:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:56:46,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 09:56:46,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:56:47,706 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 09:56:47,787 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:47,908 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:48,196 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:48,353 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:48,603 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:48,993 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:49,616 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:50,147 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:50,727 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:51,408 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:52,207 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:53,166 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:53,872 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:55,103 INFO L757 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:56,728 INFO L757 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:58,853 INFO L757 QuantifierPusher]: Run 140 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:01,236 INFO L757 QuantifierPusher]: Run 150 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:02,933 INFO L757 QuantifierPusher]: Run 160 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:04,423 INFO L757 QuantifierPusher]: Run 170 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:05,368 INFO L757 QuantifierPusher]: Run 180 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:06,412 INFO L757 QuantifierPusher]: Run 190 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:07,678 INFO L757 QuantifierPusher]: Run 200 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:09,221 INFO L757 QuantifierPusher]: Run 210 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:10,603 INFO L757 QuantifierPusher]: Run 220 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:12,596 INFO L757 QuantifierPusher]: Run 230 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:15,147 INFO L757 QuantifierPusher]: Run 240 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:18,395 INFO L757 QuantifierPusher]: Run 250 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:22,022 INFO L757 QuantifierPusher]: Run 260 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:25,978 INFO L757 QuantifierPusher]: Run 270 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:30,574 INFO L757 QuantifierPusher]: Run 280 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:34,113 INFO L757 QuantifierPusher]: Run 290 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:36,726 INFO L757 QuantifierPusher]: Run 300 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:39,519 INFO L757 QuantifierPusher]: Run 310 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:42,904 INFO L757 QuantifierPusher]: Run 320 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:46,445 INFO L757 QuantifierPusher]: Run 330 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:50,655 INFO L757 QuantifierPusher]: Run 340 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:55,055 INFO L757 QuantifierPusher]: Run 350 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:57:59,138 INFO L757 QuantifierPusher]: Run 360 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:58:03,814 INFO L757 QuantifierPusher]: Run 370 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:58:09,102 INFO L757 QuantifierPusher]: Run 380 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:58:14,613 INFO L757 QuantifierPusher]: Run 390 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:58:20,104 INFO L757 QuantifierPusher]: Run 400 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:58:25,929 INFO L757 QuantifierPusher]: Run 410 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug.