/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_overflow.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:48:47,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:48:47,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:48:47,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:48:47,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:48:47,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:48:47,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:48:47,323 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:48:47,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:48:47,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:48:47,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:48:47,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:48:47,337 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:48:47,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:48:47,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:48:47,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:48:47,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:48:47,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:48:47,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:48:47,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:48:47,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:48:47,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:48:47,376 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:48:47,379 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:48:47,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 19:48:47,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 19:48:47,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 19:48:47,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 19:48:47,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 19:48:47,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 19:48:47,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:48:47,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:48:47,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:48:47,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:48:47,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:48:47,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:48:47,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:48:47,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:48:47,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:48:47,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:48:47,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:48:47,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 19:48:47,451 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:48:47,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:48:47,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:48:47,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:48:47,457 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:48:47,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:48:47,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:48:47,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:48:47,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:48:47,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:48:47,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:48:47,459 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:48:47,460 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:48:47,460 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:48:47,460 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:48:47,460 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:48:47,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:48:47,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:48:47,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:48:47,464 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:48:47,464 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:48:47,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:48:47,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:48:47,470 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:48:47,470 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:48:47,471 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:48:47,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:48:47,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:48:47,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:48:47,875 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:48:47,876 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:48:47,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c [2021-01-06 19:48:47,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a8a07bcf4/c07647e3ae74478e9bdbd2d3297dd2a9/FLAG4cb3d2fa4 [2021-01-06 19:48:48,573 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:48:48,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c [2021-01-06 19:48:48,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a8a07bcf4/c07647e3ae74478e9bdbd2d3297dd2a9/FLAG4cb3d2fa4 [2021-01-06 19:48:48,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a8a07bcf4/c07647e3ae74478e9bdbd2d3297dd2a9 [2021-01-06 19:48:48,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:48:48,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:48:48,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:48:48,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:48:48,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:48:48,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:48:48" (1/1) ... [2021-01-06 19:48:48,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c48b40e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:48:48, skipping insertion in model container [2021-01-06 19:48:48,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:48:48" (1/1) ... [2021-01-06 19:48:48,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:48:48,952 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,] [2021-01-06 19:48:49,198 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_overflow.ufo.UNBOUNDED.pals.c[6117,6130] [2021-01-06 19:48:49,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:48:49,213 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,] [2021-01-06 19:48:49,266 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_overflow.ufo.UNBOUNDED.pals.c[6117,6130] [2021-01-06 19:48:49,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:48:49,286 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:48:49,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:48:49 WrapperNode [2021-01-06 19:48:49,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:48:49,288 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:48:49,288 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:48:49,288 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:48:49,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:48:49" (1/1) ... [2021-01-06 19:48:49,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:48:49" (1/1) ... [2021-01-06 19:48:49,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:48:49,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:48:49,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:48:49,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:48:49,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:48:49" (1/1) ... [2021-01-06 19:48:49,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:48:49" (1/1) ... [2021-01-06 19:48:49,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:48:49" (1/1) ... [2021-01-06 19:48:49,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:48:49" (1/1) ... [2021-01-06 19:48:49,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:48:49" (1/1) ... [2021-01-06 19:48:49,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:48:49" (1/1) ... [2021-01-06 19:48:49,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:48:49" (1/1) ... [2021-01-06 19:48:49,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:48:49,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:48:49,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:48:49,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:48:49,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:48:49" (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 [2021-01-06 19:48:49,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:48:49,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:48:49,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:48:49,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:48:50,371 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:48:50,371 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-01-06 19:48:50,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:48:50 BoogieIcfgContainer [2021-01-06 19:48:50,374 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:48:50,376 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:48:50,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:48:50,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:48:50,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:48:48" (1/3) ... [2021-01-06 19:48:50,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a31591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:48:50, skipping insertion in model container [2021-01-06 19:48:50,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:48:49" (2/3) ... [2021-01-06 19:48:50,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a31591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:48:50, skipping insertion in model container [2021-01-06 19:48:50,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:48:50" (3/3) ... [2021-01-06 19:48:50,387 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3_overflow.ufo.UNBOUNDED.pals.c [2021-01-06 19:48:50,397 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:48:50,403 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:48:50,425 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:48:50,467 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:48:50,468 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:48:50,468 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:48:50,468 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:48:50,468 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:48:50,468 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:48:50,468 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:48:50,468 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:48:50,483 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2021-01-06 19:48:50,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 19:48:50,490 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:50,491 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] [2021-01-06 19:48:50,491 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:50,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:50,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1133243219, now seen corresponding path program 1 times [2021-01-06 19:48:50,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:50,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193698749] [2021-01-06 19:48:50,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:50,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193698749] [2021-01-06 19:48:50,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:50,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 19:48:50,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176005930] [2021-01-06 19:48:50,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 19:48:50,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:50,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 19:48:50,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 19:48:50,804 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 2 states. [2021-01-06 19:48:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:50,841 INFO L93 Difference]: Finished difference Result 97 states and 159 transitions. [2021-01-06 19:48:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 19:48:50,843 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2021-01-06 19:48:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:50,854 INFO L225 Difference]: With dead ends: 97 [2021-01-06 19:48:50,854 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 19:48:50,857 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 [2021-01-06 19:48:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 19:48:50,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 19:48:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 19:48:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 93 transitions. [2021-01-06 19:48:50,897 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 93 transitions. Word has length 25 [2021-01-06 19:48:50,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:50,897 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 93 transitions. [2021-01-06 19:48:50,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 19:48:50,898 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 93 transitions. [2021-01-06 19:48:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 19:48:50,899 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:50,899 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] [2021-01-06 19:48:50,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:48:50,900 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:50,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:50,901 INFO L82 PathProgramCache]: Analyzing trace with hash 315594769, now seen corresponding path program 1 times [2021-01-06 19:48:50,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:50,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984104722] [2021-01-06 19:48:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:50,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984104722] [2021-01-06 19:48:50,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:51,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:48:51,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483278351] [2021-01-06 19:48:51,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:48:51,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:51,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:48:51,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:48:51,006 INFO L87 Difference]: Start difference. First operand 57 states and 93 transitions. Second operand 5 states. [2021-01-06 19:48:51,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:51,202 INFO L93 Difference]: Finished difference Result 96 states and 152 transitions. [2021-01-06 19:48:51,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:48:51,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2021-01-06 19:48:51,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:51,204 INFO L225 Difference]: With dead ends: 96 [2021-01-06 19:48:51,205 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 19:48:51,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:48:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 19:48:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 19:48:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 19:48:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2021-01-06 19:48:51,214 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 25 [2021-01-06 19:48:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:51,214 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2021-01-06 19:48:51,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:48:51,215 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2021-01-06 19:48:51,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:48:51,216 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:51,217 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] [2021-01-06 19:48:51,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 19:48:51,217 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:51,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:51,218 INFO L82 PathProgramCache]: Analyzing trace with hash -278543826, now seen corresponding path program 1 times [2021-01-06 19:48:51,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:51,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868204670] [2021-01-06 19:48:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:51,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868204670] [2021-01-06 19:48:51,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:51,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:48:51,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585918778] [2021-01-06 19:48:51,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:48:51,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:51,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:48:51,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:51,343 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 3 states. [2021-01-06 19:48:51,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:51,404 INFO L93 Difference]: Finished difference Result 121 states and 177 transitions. [2021-01-06 19:48:51,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:48:51,405 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2021-01-06 19:48:51,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:51,407 INFO L225 Difference]: With dead ends: 121 [2021-01-06 19:48:51,408 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 19:48:51,408 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 [2021-01-06 19:48:51,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 19:48:51,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-01-06 19:48:51,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 19:48:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 120 transitions. [2021-01-06 19:48:51,423 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 120 transitions. Word has length 40 [2021-01-06 19:48:51,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:51,423 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 120 transitions. [2021-01-06 19:48:51,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:48:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 120 transitions. [2021-01-06 19:48:51,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:48:51,425 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:51,426 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] [2021-01-06 19:48:51,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 19:48:51,426 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:51,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:51,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1401070434, now seen corresponding path program 1 times [2021-01-06 19:48:51,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:51,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803413873] [2021-01-06 19:48:51,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:51,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803413873] [2021-01-06 19:48:51,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:51,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:48:51,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836051676] [2021-01-06 19:48:51,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:48:51,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:51,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:48:51,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:51,514 INFO L87 Difference]: Start difference. First operand 84 states and 120 transitions. Second operand 3 states. [2021-01-06 19:48:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:51,552 INFO L93 Difference]: Finished difference Result 196 states and 296 transitions. [2021-01-06 19:48:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:48:51,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2021-01-06 19:48:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:51,555 INFO L225 Difference]: With dead ends: 196 [2021-01-06 19:48:51,556 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 19:48:51,556 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 [2021-01-06 19:48:51,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 19:48:51,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2021-01-06 19:48:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 19:48:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 195 transitions. [2021-01-06 19:48:51,576 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 195 transitions. Word has length 40 [2021-01-06 19:48:51,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:51,577 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 195 transitions. [2021-01-06 19:48:51,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:48:51,577 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 195 transitions. [2021-01-06 19:48:51,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:48:51,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:51,578 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] [2021-01-06 19:48:51,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 19:48:51,579 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:51,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:51,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1738863576, now seen corresponding path program 1 times [2021-01-06 19:48:51,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:51,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562749797] [2021-01-06 19:48:51,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:51,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:51,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562749797] [2021-01-06 19:48:51,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:51,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:48:51,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412712458] [2021-01-06 19:48:51,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:48:51,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:51,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:48:51,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:51,735 INFO L87 Difference]: Start difference. First operand 132 states and 195 transitions. Second operand 3 states. [2021-01-06 19:48:51,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:51,776 INFO L93 Difference]: Finished difference Result 328 states and 501 transitions. [2021-01-06 19:48:51,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:48:51,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2021-01-06 19:48:51,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:51,783 INFO L225 Difference]: With dead ends: 328 [2021-01-06 19:48:51,783 INFO L226 Difference]: Without dead ends: 218 [2021-01-06 19:48:51,784 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 [2021-01-06 19:48:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-01-06 19:48:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 216. [2021-01-06 19:48:51,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2021-01-06 19:48:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 323 transitions. [2021-01-06 19:48:51,816 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 323 transitions. Word has length 40 [2021-01-06 19:48:51,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:51,817 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 323 transitions. [2021-01-06 19:48:51,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:48:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 323 transitions. [2021-01-06 19:48:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:48:51,818 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:51,819 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] [2021-01-06 19:48:51,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 19:48:51,819 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:51,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1338118322, now seen corresponding path program 1 times [2021-01-06 19:48:51,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:51,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778259829] [2021-01-06 19:48:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:51,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:51,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778259829] [2021-01-06 19:48:51,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:51,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:48:51,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145158973] [2021-01-06 19:48:51,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:48:51,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:51,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:48:51,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:48:51,967 INFO L87 Difference]: Start difference. First operand 216 states and 323 transitions. Second operand 6 states. [2021-01-06 19:48:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:52,167 INFO L93 Difference]: Finished difference Result 410 states and 624 transitions. [2021-01-06 19:48:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:48:52,168 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2021-01-06 19:48:52,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:52,170 INFO L225 Difference]: With dead ends: 410 [2021-01-06 19:48:52,171 INFO L226 Difference]: Without dead ends: 216 [2021-01-06 19:48:52,172 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 [2021-01-06 19:48:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-01-06 19:48:52,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-01-06 19:48:52,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2021-01-06 19:48:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 319 transitions. [2021-01-06 19:48:52,210 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 319 transitions. Word has length 40 [2021-01-06 19:48:52,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:52,213 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 319 transitions. [2021-01-06 19:48:52,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:48:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 319 transitions. [2021-01-06 19:48:52,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:48:52,215 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:52,215 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] [2021-01-06 19:48:52,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 19:48:52,218 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:52,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:52,219 INFO L82 PathProgramCache]: Analyzing trace with hash -317049968, now seen corresponding path program 1 times [2021-01-06 19:48:52,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:52,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190652234] [2021-01-06 19:48:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:52,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190652234] [2021-01-06 19:48:52,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:52,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:48:52,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672363525] [2021-01-06 19:48:52,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:48:52,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:52,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:48:52,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:48:52,354 INFO L87 Difference]: Start difference. First operand 216 states and 319 transitions. Second operand 5 states. [2021-01-06 19:48:52,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:52,561 INFO L93 Difference]: Finished difference Result 1186 states and 1804 transitions. [2021-01-06 19:48:52,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:48:52,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2021-01-06 19:48:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:52,568 INFO L225 Difference]: With dead ends: 1186 [2021-01-06 19:48:52,568 INFO L226 Difference]: Without dead ends: 992 [2021-01-06 19:48:52,570 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 [2021-01-06 19:48:52,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-01-06 19:48:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 408. [2021-01-06 19:48:52,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2021-01-06 19:48:52,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 599 transitions. [2021-01-06 19:48:52,622 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 599 transitions. Word has length 40 [2021-01-06 19:48:52,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:52,623 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 599 transitions. [2021-01-06 19:48:52,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:48:52,623 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 599 transitions. [2021-01-06 19:48:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 19:48:52,624 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:52,624 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] [2021-01-06 19:48:52,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 19:48:52,625 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:52,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1091548472, now seen corresponding path program 1 times [2021-01-06 19:48:52,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:52,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952217550] [2021-01-06 19:48:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:52,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952217550] [2021-01-06 19:48:52,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:52,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:48:52,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963214479] [2021-01-06 19:48:52,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:48:52,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:52,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:48:52,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:48:52,799 INFO L87 Difference]: Start difference. First operand 408 states and 599 transitions. Second operand 5 states. [2021-01-06 19:48:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:52,920 INFO L93 Difference]: Finished difference Result 990 states and 1474 transitions. [2021-01-06 19:48:52,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:48:52,921 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2021-01-06 19:48:52,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:52,925 INFO L225 Difference]: With dead ends: 990 [2021-01-06 19:48:52,925 INFO L226 Difference]: Without dead ends: 604 [2021-01-06 19:48:52,926 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 [2021-01-06 19:48:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-01-06 19:48:52,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 408. [2021-01-06 19:48:52,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2021-01-06 19:48:52,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 591 transitions. [2021-01-06 19:48:52,963 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 591 transitions. Word has length 42 [2021-01-06 19:48:52,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:52,963 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 591 transitions. [2021-01-06 19:48:52,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:48:52,964 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 591 transitions. [2021-01-06 19:48:52,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 19:48:52,964 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:52,965 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] [2021-01-06 19:48:52,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 19:48:52,965 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:52,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:52,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1158041984, now seen corresponding path program 1 times [2021-01-06 19:48:52,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:52,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746090815] [2021-01-06 19:48:52,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:53,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746090815] [2021-01-06 19:48:53,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:53,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:48:53,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200900927] [2021-01-06 19:48:53,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:48:53,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:53,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:48:53,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:53,018 INFO L87 Difference]: Start difference. First operand 408 states and 591 transitions. Second operand 3 states. [2021-01-06 19:48:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:53,088 INFO L93 Difference]: Finished difference Result 970 states and 1411 transitions. [2021-01-06 19:48:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:48:53,089 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2021-01-06 19:48:53,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:53,092 INFO L225 Difference]: With dead ends: 970 [2021-01-06 19:48:53,092 INFO L226 Difference]: Without dead ends: 584 [2021-01-06 19:48:53,093 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 [2021-01-06 19:48:53,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-01-06 19:48:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 582. [2021-01-06 19:48:53,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2021-01-06 19:48:53,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 829 transitions. [2021-01-06 19:48:53,142 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 829 transitions. Word has length 42 [2021-01-06 19:48:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:53,142 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 829 transitions. [2021-01-06 19:48:53,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:48:53,143 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 829 transitions. [2021-01-06 19:48:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 19:48:53,144 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:53,144 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] [2021-01-06 19:48:53,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-06 19:48:53,144 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:53,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:53,145 INFO L82 PathProgramCache]: Analyzing trace with hash 107012533, now seen corresponding path program 1 times [2021-01-06 19:48:53,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:53,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793314315] [2021-01-06 19:48:53,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:53,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793314315] [2021-01-06 19:48:53,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:53,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 19:48:53,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874175386] [2021-01-06 19:48:53,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:48:53,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:53,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:48:53,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:48:53,247 INFO L87 Difference]: Start difference. First operand 582 states and 829 transitions. Second operand 8 states. [2021-01-06 19:48:53,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:53,492 INFO L93 Difference]: Finished difference Result 1089 states and 1532 transitions. [2021-01-06 19:48:53,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 19:48:53,493 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2021-01-06 19:48:53,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:53,499 INFO L225 Difference]: With dead ends: 1089 [2021-01-06 19:48:53,499 INFO L226 Difference]: Without dead ends: 1087 [2021-01-06 19:48:53,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-01-06 19:48:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-01-06 19:48:53,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 630. [2021-01-06 19:48:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2021-01-06 19:48:53,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 873 transitions. [2021-01-06 19:48:53,568 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 873 transitions. Word has length 43 [2021-01-06 19:48:53,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:53,568 INFO L481 AbstractCegarLoop]: Abstraction has 630 states and 873 transitions. [2021-01-06 19:48:53,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:48:53,568 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 873 transitions. [2021-01-06 19:48:53,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 19:48:53,570 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:53,570 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] [2021-01-06 19:48:53,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 19:48:53,571 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:53,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:53,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1768278086, now seen corresponding path program 1 times [2021-01-06 19:48:53,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:53,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594090201] [2021-01-06 19:48:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 19:48:53,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594090201] [2021-01-06 19:48:53,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:53,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:48:53,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810255756] [2021-01-06 19:48:53,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:48:53,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:53,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:48:53,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:48:53,643 INFO L87 Difference]: Start difference. First operand 630 states and 873 transitions. Second operand 5 states. [2021-01-06 19:48:53,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:53,915 INFO L93 Difference]: Finished difference Result 2582 states and 3597 transitions. [2021-01-06 19:48:53,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:48:53,916 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2021-01-06 19:48:53,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:53,926 INFO L225 Difference]: With dead ends: 2582 [2021-01-06 19:48:53,926 INFO L226 Difference]: Without dead ends: 1976 [2021-01-06 19:48:53,928 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 [2021-01-06 19:48:53,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-01-06 19:48:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1234. [2021-01-06 19:48:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2021-01-06 19:48:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1709 transitions. [2021-01-06 19:48:54,063 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1709 transitions. Word has length 62 [2021-01-06 19:48:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:54,063 INFO L481 AbstractCegarLoop]: Abstraction has 1234 states and 1709 transitions. [2021-01-06 19:48:54,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:48:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1709 transitions. [2021-01-06 19:48:54,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 19:48:54,065 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:54,065 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] [2021-01-06 19:48:54,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 19:48:54,065 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:54,066 INFO L82 PathProgramCache]: Analyzing trace with hash -504730, now seen corresponding path program 1 times [2021-01-06 19:48:54,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:54,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584057838] [2021-01-06 19:48:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 19:48:54,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584057838] [2021-01-06 19:48:54,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:54,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:48:54,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260127318] [2021-01-06 19:48:54,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:48:54,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:54,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:48:54,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:48:54,193 INFO L87 Difference]: Start difference. First operand 1234 states and 1709 transitions. Second operand 5 states. [2021-01-06 19:48:54,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:54,490 INFO L93 Difference]: Finished difference Result 3186 states and 4433 transitions. [2021-01-06 19:48:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:48:54,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2021-01-06 19:48:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:54,504 INFO L225 Difference]: With dead ends: 3186 [2021-01-06 19:48:54,504 INFO L226 Difference]: Without dead ends: 2580 [2021-01-06 19:48:54,506 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 [2021-01-06 19:48:54,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2021-01-06 19:48:54,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2142. [2021-01-06 19:48:54,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2142 states. [2021-01-06 19:48:54,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2142 states to 2142 states and 2953 transitions. [2021-01-06 19:48:54,698 INFO L78 Accepts]: Start accepts. Automaton has 2142 states and 2953 transitions. Word has length 62 [2021-01-06 19:48:54,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:54,698 INFO L481 AbstractCegarLoop]: Abstraction has 2142 states and 2953 transitions. [2021-01-06 19:48:54,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:48:54,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2142 states and 2953 transitions. [2021-01-06 19:48:54,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 19:48:54,700 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:54,700 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] [2021-01-06 19:48:54,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-01-06 19:48:54,701 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1131135110, now seen corresponding path program 1 times [2021-01-06 19:48:54,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:54,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788065722] [2021-01-06 19:48:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:48:54,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788065722] [2021-01-06 19:48:54,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:54,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:48:54,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539683612] [2021-01-06 19:48:54,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:48:54,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:54,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:48:54,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:48:54,799 INFO L87 Difference]: Start difference. First operand 2142 states and 2953 transitions. Second operand 5 states. [2021-01-06 19:48:55,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:55,078 INFO L93 Difference]: Finished difference Result 3618 states and 5037 transitions. [2021-01-06 19:48:55,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:48:55,079 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2021-01-06 19:48:55,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:55,095 INFO L225 Difference]: With dead ends: 3618 [2021-01-06 19:48:55,095 INFO L226 Difference]: Without dead ends: 3184 [2021-01-06 19:48:55,098 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 [2021-01-06 19:48:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-01-06 19:48:55,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2574. [2021-01-06 19:48:55,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2574 states. [2021-01-06 19:48:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2574 states to 2574 states and 3561 transitions. [2021-01-06 19:48:55,393 INFO L78 Accepts]: Start accepts. Automaton has 2574 states and 3561 transitions. Word has length 62 [2021-01-06 19:48:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:55,397 INFO L481 AbstractCegarLoop]: Abstraction has 2574 states and 3561 transitions. [2021-01-06 19:48:55,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:48:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2574 states and 3561 transitions. [2021-01-06 19:48:55,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 19:48:55,399 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:55,399 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] [2021-01-06 19:48:55,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-01-06 19:48:55,400 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:55,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:55,400 INFO L82 PathProgramCache]: Analyzing trace with hash 524485384, now seen corresponding path program 1 times [2021-01-06 19:48:55,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:55,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192843435] [2021-01-06 19:48:55,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:55,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192843435] [2021-01-06 19:48:55,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285345261] [2021-01-06 19:48:55,626 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 [2021-01-06 19:48:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:55,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 19:48:55,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:48:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:48:56,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:48:56,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2021-01-06 19:48:56,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139409119] [2021-01-06 19:48:56,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 19:48:56,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:56,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 19:48:56,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:48:56,083 INFO L87 Difference]: Start difference. First operand 2574 states and 3561 transitions. Second operand 12 states. [2021-01-06 19:48:59,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:59,755 INFO L93 Difference]: Finished difference Result 12705 states and 17538 transitions. [2021-01-06 19:48:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 19:48:59,755 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2021-01-06 19:48:59,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:59,805 INFO L225 Difference]: With dead ends: 12705 [2021-01-06 19:48:59,806 INFO L226 Difference]: Without dead ends: 10155 [2021-01-06 19:48:59,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=690, Invalid=2502, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 19:48:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10155 states. [2021-01-06 19:49:00,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10155 to 7490. [2021-01-06 19:49:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7490 states. [2021-01-06 19:49:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 10157 transitions. [2021-01-06 19:49:00,818 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 10157 transitions. Word has length 63 [2021-01-06 19:49:00,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:00,818 INFO L481 AbstractCegarLoop]: Abstraction has 7490 states and 10157 transitions. [2021-01-06 19:49:00,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 19:49:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 10157 transitions. [2021-01-06 19:49:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:49:00,820 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:00,821 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] [2021-01-06 19:49:01,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 19:49:01,036 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:01,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:01,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1834252770, now seen corresponding path program 1 times [2021-01-06 19:49:01,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:01,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262448685] [2021-01-06 19:49:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:01,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:01,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262448685] [2021-01-06 19:49:01,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575045954] [2021-01-06 19:49:01,231 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 [2021-01-06 19:49:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:01,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 19:49:01,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:49:01,503 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 19:49:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:01,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:49:01,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 19:49:01,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695101207] [2021-01-06 19:49:01,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:49:01,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:01,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:49:01,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:49:01,806 INFO L87 Difference]: Start difference. First operand 7490 states and 10157 transitions. Second operand 17 states. [2021-01-06 19:49:05,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:05,685 INFO L93 Difference]: Finished difference Result 33234 states and 44632 transitions. [2021-01-06 19:49:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 19:49:05,686 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2021-01-06 19:49:05,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:05,768 INFO L225 Difference]: With dead ends: 33234 [2021-01-06 19:49:05,769 INFO L226 Difference]: Without dead ends: 28044 [2021-01-06 19:49:05,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 19:49:05,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28044 states. [2021-01-06 19:49:07,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28044 to 16030. [2021-01-06 19:49:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16030 states. [2021-01-06 19:49:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16030 states to 16030 states and 21637 transitions. [2021-01-06 19:49:07,800 INFO L78 Accepts]: Start accepts. Automaton has 16030 states and 21637 transitions. Word has length 64 [2021-01-06 19:49:07,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:07,800 INFO L481 AbstractCegarLoop]: Abstraction has 16030 states and 21637 transitions. [2021-01-06 19:49:07,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:49:07,801 INFO L276 IsEmpty]: Start isEmpty. Operand 16030 states and 21637 transitions. [2021-01-06 19:49:07,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:49:07,803 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:07,803 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] [2021-01-06 19:49:08,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 19:49:08,018 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:08,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:08,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1317901808, now seen corresponding path program 1 times [2021-01-06 19:49:08,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:08,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151248614] [2021-01-06 19:49:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:08,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151248614] [2021-01-06 19:49:08,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417528230] [2021-01-06 19:49:08,365 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 [2021-01-06 19:49:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:08,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 19:49:08,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:49:08,618 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 19:49:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:08,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:49:08,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 19:49:08,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16615539] [2021-01-06 19:49:08,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:49:08,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:08,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:49:08,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:49:08,925 INFO L87 Difference]: Start difference. First operand 16030 states and 21637 transitions. Second operand 17 states. [2021-01-06 19:49:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:17,893 INFO L93 Difference]: Finished difference Result 97160 states and 129660 transitions. [2021-01-06 19:49:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 19:49:17,893 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2021-01-06 19:49:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:18,079 INFO L225 Difference]: With dead ends: 97160 [2021-01-06 19:49:18,079 INFO L226 Difference]: Without dead ends: 81154 [2021-01-06 19:49:18,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=596, Invalid=1660, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 19:49:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81154 states. [2021-01-06 19:49:22,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81154 to 39242. [2021-01-06 19:49:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39242 states. [2021-01-06 19:49:22,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39242 states to 39242 states and 52811 transitions. [2021-01-06 19:49:22,755 INFO L78 Accepts]: Start accepts. Automaton has 39242 states and 52811 transitions. Word has length 64 [2021-01-06 19:49:22,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:22,755 INFO L481 AbstractCegarLoop]: Abstraction has 39242 states and 52811 transitions. [2021-01-06 19:49:22,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:49:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 39242 states and 52811 transitions. [2021-01-06 19:49:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:49:22,761 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:22,762 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] [2021-01-06 19:49:22,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 19:49:22,977 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:22,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:22,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1759080090, now seen corresponding path program 1 times [2021-01-06 19:49:22,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:22,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002897667] [2021-01-06 19:49:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:23,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002897667] [2021-01-06 19:49:23,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:23,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:49:23,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806699010] [2021-01-06 19:49:23,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:49:23,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:23,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:49:23,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:49:23,047 INFO L87 Difference]: Start difference. First operand 39242 states and 52811 transitions. Second operand 3 states. [2021-01-06 19:49:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:26,698 INFO L93 Difference]: Finished difference Result 78462 states and 105599 transitions. [2021-01-06 19:49:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:49:26,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2021-01-06 19:49:26,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:26,765 INFO L225 Difference]: With dead ends: 78462 [2021-01-06 19:49:26,766 INFO L226 Difference]: Without dead ends: 39244 [2021-01-06 19:49:26,810 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 [2021-01-06 19:49:26,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39244 states. [2021-01-06 19:49:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39244 to 38354. [2021-01-06 19:49:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38354 states. [2021-01-06 19:49:30,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38354 states to 38354 states and 50591 transitions. [2021-01-06 19:49:30,680 INFO L78 Accepts]: Start accepts. Automaton has 38354 states and 50591 transitions. Word has length 64 [2021-01-06 19:49:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:30,680 INFO L481 AbstractCegarLoop]: Abstraction has 38354 states and 50591 transitions. [2021-01-06 19:49:30,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:49:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 38354 states and 50591 transitions. [2021-01-06 19:49:30,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:49:30,683 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:30,683 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] [2021-01-06 19:49:30,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-01-06 19:49:30,683 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:30,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:30,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1288379590, now seen corresponding path program 1 times [2021-01-06 19:49:30,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:30,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158412399] [2021-01-06 19:49:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:30,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158412399] [2021-01-06 19:49:30,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:30,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:49:30,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029070549] [2021-01-06 19:49:30,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:49:30,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:30,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:49:30,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:49:30,727 INFO L87 Difference]: Start difference. First operand 38354 states and 50591 transitions. Second operand 3 states. [2021-01-06 19:49:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:32,686 INFO L93 Difference]: Finished difference Result 59942 states and 78955 transitions. [2021-01-06 19:49:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:49:32,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2021-01-06 19:49:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:32,711 INFO L225 Difference]: With dead ends: 59942 [2021-01-06 19:49:32,711 INFO L226 Difference]: Without dead ends: 21612 [2021-01-06 19:49:32,732 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 [2021-01-06 19:49:32,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21612 states. [2021-01-06 19:49:34,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21612 to 21610. [2021-01-06 19:49:34,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21610 states. [2021-01-06 19:49:34,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21610 states to 21610 states and 27781 transitions. [2021-01-06 19:49:34,727 INFO L78 Accepts]: Start accepts. Automaton has 21610 states and 27781 transitions. Word has length 64 [2021-01-06 19:49:34,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:34,728 INFO L481 AbstractCegarLoop]: Abstraction has 21610 states and 27781 transitions. [2021-01-06 19:49:34,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:49:34,728 INFO L276 IsEmpty]: Start isEmpty. Operand 21610 states and 27781 transitions. [2021-01-06 19:49:34,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:49:34,729 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:34,729 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] [2021-01-06 19:49:34,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-01-06 19:49:34,729 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:34,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:34,730 INFO L82 PathProgramCache]: Analyzing trace with hash 267493414, now seen corresponding path program 1 times [2021-01-06 19:49:34,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:34,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585289474] [2021-01-06 19:49:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:34,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585289474] [2021-01-06 19:49:34,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:34,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:49:34,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595404441] [2021-01-06 19:49:34,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:49:34,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:34,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:49:34,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:49:34,771 INFO L87 Difference]: Start difference. First operand 21610 states and 27781 transitions. Second operand 3 states. [2021-01-06 19:49:35,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:35,621 INFO L93 Difference]: Finished difference Result 30020 states and 38681 transitions. [2021-01-06 19:49:35,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:49:35,622 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2021-01-06 19:49:35,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:35,628 INFO L225 Difference]: With dead ends: 30020 [2021-01-06 19:49:35,629 INFO L226 Difference]: Without dead ends: 8434 [2021-01-06 19:49:35,645 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 [2021-01-06 19:49:35,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8434 states. [2021-01-06 19:49:36,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8434 to 7892. [2021-01-06 19:49:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7892 states. [2021-01-06 19:49:36,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7892 states to 7892 states and 10064 transitions. [2021-01-06 19:49:36,322 INFO L78 Accepts]: Start accepts. Automaton has 7892 states and 10064 transitions. Word has length 64 [2021-01-06 19:49:36,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:36,323 INFO L481 AbstractCegarLoop]: Abstraction has 7892 states and 10064 transitions. [2021-01-06 19:49:36,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:49:36,323 INFO L276 IsEmpty]: Start isEmpty. Operand 7892 states and 10064 transitions. [2021-01-06 19:49:36,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:49:36,324 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:36,324 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] [2021-01-06 19:49:36,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-01-06 19:49:36,324 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:36,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:36,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1812683410, now seen corresponding path program 1 times [2021-01-06 19:49:36,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:36,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899253958] [2021-01-06 19:49:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 19:49:36,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899253958] [2021-01-06 19:49:36,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:36,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:49:36,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188054839] [2021-01-06 19:49:36,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:49:36,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:36,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:49:36,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:49:36,385 INFO L87 Difference]: Start difference. First operand 7892 states and 10064 transitions. Second operand 6 states. [2021-01-06 19:49:37,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:37,123 INFO L93 Difference]: Finished difference Result 14601 states and 18647 transitions. [2021-01-06 19:49:37,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:49:37,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2021-01-06 19:49:37,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:37,131 INFO L225 Difference]: With dead ends: 14601 [2021-01-06 19:49:37,131 INFO L226 Difference]: Without dead ends: 6770 [2021-01-06 19:49:37,136 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 [2021-01-06 19:49:37,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6770 states. [2021-01-06 19:49:37,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6770 to 6770. [2021-01-06 19:49:37,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6770 states. [2021-01-06 19:49:37,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6770 states to 6770 states and 8471 transitions. [2021-01-06 19:49:37,687 INFO L78 Accepts]: Start accepts. Automaton has 6770 states and 8471 transitions. Word has length 64 [2021-01-06 19:49:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:37,687 INFO L481 AbstractCegarLoop]: Abstraction has 6770 states and 8471 transitions. [2021-01-06 19:49:37,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:49:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 6770 states and 8471 transitions. [2021-01-06 19:49:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:49:37,688 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:37,688 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] [2021-01-06 19:49:37,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-01-06 19:49:37,689 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:37,689 INFO L82 PathProgramCache]: Analyzing trace with hash 923535022, now seen corresponding path program 1 times [2021-01-06 19:49:37,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:37,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167932729] [2021-01-06 19:49:37,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:49:37,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167932729] [2021-01-06 19:49:37,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:49:37,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 19:49:37,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536752122] [2021-01-06 19:49:37,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 19:49:37,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:37,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 19:49:37,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:49:37,863 INFO L87 Difference]: Start difference. First operand 6770 states and 8471 transitions. Second operand 7 states. [2021-01-06 19:49:38,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:38,940 INFO L93 Difference]: Finished difference Result 14047 states and 17666 transitions. [2021-01-06 19:49:38,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:49:38,940 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2021-01-06 19:49:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:38,947 INFO L225 Difference]: With dead ends: 14047 [2021-01-06 19:49:38,947 INFO L226 Difference]: Without dead ends: 7378 [2021-01-06 19:49:38,951 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 [2021-01-06 19:49:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7378 states. [2021-01-06 19:49:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7378 to 7376. [2021-01-06 19:49:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7376 states. [2021-01-06 19:49:39,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 9205 transitions. [2021-01-06 19:49:39,656 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 9205 transitions. Word has length 64 [2021-01-06 19:49:39,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:39,656 INFO L481 AbstractCegarLoop]: Abstraction has 7376 states and 9205 transitions. [2021-01-06 19:49:39,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 19:49:39,656 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 9205 transitions. [2021-01-06 19:49:39,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:49:39,657 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:39,657 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] [2021-01-06 19:49:39,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-01-06 19:49:39,657 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:39,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:39,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1919799259, now seen corresponding path program 1 times [2021-01-06 19:49:39,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:39,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653010852] [2021-01-06 19:49:39,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:40,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653010852] [2021-01-06 19:49:40,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730319216] [2021-01-06 19:49:40,535 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 [2021-01-06 19:49:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:40,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 19:49:40,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:49:41,097 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 19:49:41,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:41,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:49:41,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-01-06 19:49:41,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605148562] [2021-01-06 19:49:41,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 19:49:41,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:41,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 19:49:41,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 19:49:41,838 INFO L87 Difference]: Start difference. First operand 7376 states and 9205 transitions. Second operand 33 states. [2021-01-06 19:49:42,155 WARN L197 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-01-06 19:49:43,178 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2021-01-06 19:49:43,574 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 72 [2021-01-06 19:49:43,904 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2021-01-06 19:49:44,292 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2021-01-06 19:49:44,700 WARN L197 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 78 [2021-01-06 19:49:44,949 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-01-06 19:49:45,191 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2021-01-06 19:49:45,432 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2021-01-06 19:49:45,620 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-01-06 19:49:45,870 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-01-06 19:49:46,270 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2021-01-06 19:49:46,434 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-01-06 19:49:47,232 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-01-06 19:49:49,237 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-01-06 19:49:49,556 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2021-01-06 19:49:49,729 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-01-06 19:49:50,168 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-01-06 19:49:50,737 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-01-06 19:49:51,004 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-01-06 19:49:51,243 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-01-06 19:49:52,311 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2021-01-06 19:49:52,720 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2021-01-06 19:49:53,102 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-01-06 19:49:53,594 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-01-06 19:49:54,876 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-01-06 19:49:55,516 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-01-06 19:49:55,762 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-01-06 19:49:56,093 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-01-06 19:49:56,316 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-01-06 19:49:56,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:56,833 INFO L93 Difference]: Finished difference Result 17415 states and 21915 transitions. [2021-01-06 19:49:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 19:49:56,835 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2021-01-06 19:49:56,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:56,849 INFO L225 Difference]: With dead ends: 17415 [2021-01-06 19:49:56,849 INFO L226 Difference]: Without dead ends: 13816 [2021-01-06 19:49:56,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2010 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1646, Invalid=7474, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 19:49:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13816 states. [2021-01-06 19:49:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13816 to 6416. [2021-01-06 19:49:57,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6416 states. [2021-01-06 19:49:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 8023 transitions. [2021-01-06 19:49:57,641 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 8023 transitions. Word has length 65 [2021-01-06 19:49:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:57,641 INFO L481 AbstractCegarLoop]: Abstraction has 6416 states and 8023 transitions. [2021-01-06 19:49:57,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 19:49:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 8023 transitions. [2021-01-06 19:49:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:49:57,642 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:57,642 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] [2021-01-06 19:49:57,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:49:57,848 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:57,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:57,849 INFO L82 PathProgramCache]: Analyzing trace with hash 417440152, now seen corresponding path program 1 times [2021-01-06 19:49:57,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:57,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114047681] [2021-01-06 19:49:57,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:58,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114047681] [2021-01-06 19:49:58,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291042217] [2021-01-06 19:49:58,820 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 [2021-01-06 19:49:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:58,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 19:49:58,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:49:59,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 19:49:59,711 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 30 [2021-01-06 19:50:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:50:00,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:50:00,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 34 [2021-01-06 19:50:00,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741753531] [2021-01-06 19:50:00,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 19:50:00,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:50:00,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 19:50:00,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1037, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 19:50:00,192 INFO L87 Difference]: Start difference. First operand 6416 states and 8023 transitions. Second operand 34 states. [2021-01-06 19:50:00,569 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2021-01-06 19:50:01,786 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2021-01-06 19:50:02,013 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-01-06 19:50:02,310 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-01-06 19:50:02,800 WARN L197 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2021-01-06 19:50:03,317 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 85 [2021-01-06 19:50:03,874 WARN L197 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2021-01-06 19:50:04,223 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-01-06 19:50:04,541 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-01-06 19:50:04,911 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2021-01-06 19:50:05,181 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-01-06 19:50:05,497 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 58 [2021-01-06 19:50:05,751 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-01-06 19:50:06,058 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2021-01-06 19:50:06,382 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-01-06 19:50:06,704 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-01-06 19:50:06,972 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2021-01-06 19:50:07,292 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-01-06 19:50:07,677 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-01-06 19:50:07,972 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2021-01-06 19:50:08,631 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-01-06 19:50:08,847 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-01-06 19:50:09,394 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-01-06 19:50:09,675 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2021-01-06 19:50:10,037 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-01-06 19:50:10,306 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2021-01-06 19:50:10,707 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2021-01-06 19:50:11,056 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2021-01-06 19:50:11,393 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-01-06 19:50:11,555 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-01-06 19:50:11,900 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-01-06 19:50:12,425 WARN L197 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2021-01-06 19:50:12,614 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-01-06 19:50:12,830 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-01-06 19:50:13,119 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-01-06 19:50:13,648 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-01-06 19:50:14,311 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-01-06 19:50:14,588 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2021-01-06 19:50:15,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:50:15,159 INFO L93 Difference]: Finished difference Result 13238 states and 16826 transitions. [2021-01-06 19:50:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 19:50:15,160 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 65 [2021-01-06 19:50:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:50:15,170 INFO L225 Difference]: With dead ends: 13238 [2021-01-06 19:50:15,170 INFO L226 Difference]: Without dead ends: 10099 [2021-01-06 19:50:15,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=1234, Invalid=5572, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 19:50:15,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10099 states. [2021-01-06 19:50:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10099 to 5375. [2021-01-06 19:50:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5375 states. [2021-01-06 19:50:15,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5375 states to 5375 states and 6761 transitions. [2021-01-06 19:50:15,794 INFO L78 Accepts]: Start accepts. Automaton has 5375 states and 6761 transitions. Word has length 65 [2021-01-06 19:50:15,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:50:15,795 INFO L481 AbstractCegarLoop]: Abstraction has 5375 states and 6761 transitions. [2021-01-06 19:50:15,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 19:50:15,795 INFO L276 IsEmpty]: Start isEmpty. Operand 5375 states and 6761 transitions. [2021-01-06 19:50:15,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 19:50:15,795 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:50:15,796 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] [2021-01-06 19:50:15,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 19:50:15,997 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:50:15,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:50:15,998 INFO L82 PathProgramCache]: Analyzing trace with hash -242953003, now seen corresponding path program 1 times [2021-01-06 19:50:15,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:50:15,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088948028] [2021-01-06 19:50:15,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:50:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:50:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:50:16,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088948028] [2021-01-06 19:50:16,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749207279] [2021-01-06 19:50:16,584 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 [2021-01-06 19:50:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:50:16,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 19:50:16,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:50:17,079 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 19:50:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:50:17,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:50:17,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2021-01-06 19:50:17,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321513724] [2021-01-06 19:50:17,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 19:50:17,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:50:17,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 19:50:17,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-01-06 19:50:17,566 INFO L87 Difference]: Start difference. First operand 5375 states and 6761 transitions. Second operand 24 states. [2021-01-06 19:50:18,427 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2021-01-06 19:50:18,852 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 86 [2021-01-06 19:50:19,419 WARN L197 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 96 [2021-01-06 19:50:20,039 WARN L197 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 94 [2021-01-06 19:50:20,604 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-01-06 19:50:20,978 WARN L197 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2021-01-06 19:50:21,505 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-01-06 19:50:21,800 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-01-06 19:50:22,235 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2021-01-06 19:50:22,639 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 76 [2021-01-06 19:50:23,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:50:23,862 INFO L93 Difference]: Finished difference Result 8675 states and 11118 transitions. [2021-01-06 19:50:23,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 19:50:23,863 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 67 [2021-01-06 19:50:23,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:50:23,864 INFO L225 Difference]: With dead ends: 8675 [2021-01-06 19:50:23,864 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 19:50:23,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=359, Invalid=1281, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 19:50:23,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 19:50:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 19:50:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 19:50:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 19:50:23,869 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 67 [2021-01-06 19:50:23,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:50:23,870 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 19:50:23,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 19:50:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 19:50:23,870 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 19:50:24,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:50:24,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 19:50:39,731 WARN L197 SmtUtils]: Spent 15.63 s on a formula simplification. DAG size of input: 1794 DAG size of output: 1674 [2021-01-06 19:50:54,623 WARN L197 SmtUtils]: Spent 14.87 s on a formula simplification. DAG size of input: 1908 DAG size of output: 1764 [2021-01-06 19:51:10,198 WARN L197 SmtUtils]: Spent 15.55 s on a formula simplification. DAG size of input: 1868 DAG size of output: 1792 [2021-01-06 19:51:57,876 WARN L197 SmtUtils]: Spent 47.66 s on a formula simplification. DAG size of input: 3113 DAG size of output: 2864 [2021-01-06 19:52:13,017 WARN L197 SmtUtils]: Spent 15.12 s on a formula simplification. DAG size of input: 1839 DAG size of output: 1804 [2021-01-06 19:52:27,450 WARN L197 SmtUtils]: Spent 14.42 s on a formula simplification. DAG size of input: 1742 DAG size of output: 1623