/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:43:45,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:43:45,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:43:45,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:43:45,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:43:45,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:43:45,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:43:45,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:43:45,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:43:45,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:43:45,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:43:45,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:43:45,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:43:45,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:43:45,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:43:45,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:43:45,362 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:43:45,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:43:45,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:43:45,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:43:45,385 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:43:45,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:43:45,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:43:45,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:43:45,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 19:43:45,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:43:45,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:43:45,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:43:45,399 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:43:45,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:43:45,401 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:43:45,402 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:43:45,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:43:45,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:43:45,403 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:43:45,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:43:45,405 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 19:43:45,434 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:43:45,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:43:45,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:43:45,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:43:45,437 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:43:45,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:43:45,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:43:45,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:43:45,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:43:45,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:43:45,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:43:45,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:43:45,439 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:43:45,440 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:43:45,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:43:45,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:43:45,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:43:45,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:43:45,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:43:45,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:43:45,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:43:45,442 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:43:45,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:43:45,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:43:45,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:43:45,443 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:43:45,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:43:45,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:43:45,850 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:43:45,851 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:43:45,852 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:43:45,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2021-01-06 19:43:45,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2bf395152/d0848f1982fb4127907fe4751c98a1ea/FLAGd46ef73e7 [2021-01-06 19:43:46,560 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:43:46,561 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2021-01-06 19:43:46,573 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2bf395152/d0848f1982fb4127907fe4751c98a1ea/FLAGd46ef73e7 [2021-01-06 19:43:46,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2bf395152/d0848f1982fb4127907fe4751c98a1ea [2021-01-06 19:43:46,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:43:46,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:43:46,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:43:46,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:43:46,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:43:46,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:43:46" (1/1) ... [2021-01-06 19:43:46,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b2c15e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:43:46, skipping insertion in model container [2021-01-06 19:43:46,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:43:46" (1/1) ... [2021-01-06 19:43:46,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:43:46,950 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~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[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~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 19:43:47,173 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c[6899,6912] [2021-01-06 19:43:47,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:43:47,187 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~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[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~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 19:43:47,264 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c[6899,6912] [2021-01-06 19:43:47,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:43:47,295 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:43:47,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:43:47 WrapperNode [2021-01-06 19:43:47,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:43:47,298 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:43:47,298 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:43:47,298 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:43:47,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:43:47" (1/1) ... [2021-01-06 19:43:47,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:43:47" (1/1) ... [2021-01-06 19:43:47,386 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:43:47,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:43:47,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:43:47,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:43:47,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:43:47" (1/1) ... [2021-01-06 19:43:47,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:43:47" (1/1) ... [2021-01-06 19:43:47,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:43:47" (1/1) ... [2021-01-06 19:43:47,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:43:47" (1/1) ... [2021-01-06 19:43:47,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:43:47" (1/1) ... [2021-01-06 19:43:47,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:43:47" (1/1) ... [2021-01-06 19:43:47,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:43:47" (1/1) ... [2021-01-06 19:43:47,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:43:47,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:43:47,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:43:47,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:43:47,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:43:47" (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 19:43:47,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:43:47,566 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:43:47,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:43:47,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:43:48,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:43:48,211 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-01-06 19:43:48,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:43:48 BoogieIcfgContainer [2021-01-06 19:43:48,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:43:48,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:43:48,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:43:48,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:43:48,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:43:46" (1/3) ... [2021-01-06 19:43:48,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd35e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:43:48, skipping insertion in model container [2021-01-06 19:43:48,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:43:47" (2/3) ... [2021-01-06 19:43:48,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bd35e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:43:48, skipping insertion in model container [2021-01-06 19:43:48,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:43:48" (3/3) ... [2021-01-06 19:43:48,244 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c [2021-01-06 19:43:48,263 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:43:48,279 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:43:48,326 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:43:48,364 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:43:48,364 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:43:48,364 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:43:48,364 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:43:48,365 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:43:48,365 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:43:48,365 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:43:48,365 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:43:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2021-01-06 19:43:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 19:43:48,398 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:43:48,399 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] [2021-01-06 19:43:48,400 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:43:48,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:43:48,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1546658209, now seen corresponding path program 1 times [2021-01-06 19:43:48,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:43:48,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058394677] [2021-01-06 19:43:48,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:43:48,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:43:48,799 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 19:43:48,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058394677] [2021-01-06 19:43:48,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:43:48,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:43:48,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320604001] [2021-01-06 19:43:48,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:43:48,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:43:48,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:43:48,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:43:48,835 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 5 states. [2021-01-06 19:43:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:43:48,937 INFO L93 Difference]: Finished difference Result 137 states and 223 transitions. [2021-01-06 19:43:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:43:48,939 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2021-01-06 19:43:48,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:43:48,950 INFO L225 Difference]: With dead ends: 137 [2021-01-06 19:43:48,951 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 19:43:48,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:43:48,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 19:43:49,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-01-06 19:43:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 19:43:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2021-01-06 19:43:49,009 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 26 [2021-01-06 19:43:49,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:43:49,009 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2021-01-06 19:43:49,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:43:49,010 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2021-01-06 19:43:49,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 19:43:49,012 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:43:49,012 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 19:43:49,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:43:49,013 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:43:49,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:43:49,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1146437097, now seen corresponding path program 1 times [2021-01-06 19:43:49,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:43:49,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060331544] [2021-01-06 19:43:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:43:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:43:49,116 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 19:43:49,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060331544] [2021-01-06 19:43:49,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:43:49,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:43:49,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080825911] [2021-01-06 19:43:49,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:43:49,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:43:49,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:43:49,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:43:49,121 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 3 states. [2021-01-06 19:43:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:43:49,155 INFO L93 Difference]: Finished difference Result 170 states and 255 transitions. [2021-01-06 19:43:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:43:49,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2021-01-06 19:43:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:43:49,159 INFO L225 Difference]: With dead ends: 170 [2021-01-06 19:43:49,159 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 19:43:49,161 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 19:43:49,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 19:43:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2021-01-06 19:43:49,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 19:43:49,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 169 transitions. [2021-01-06 19:43:49,192 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 169 transitions. Word has length 42 [2021-01-06 19:43:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:43:49,195 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 169 transitions. [2021-01-06 19:43:49,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:43:49,195 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 169 transitions. [2021-01-06 19:43:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 19:43:49,198 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:43:49,199 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 19:43:49,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 19:43:49,199 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:43:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:43:49,202 INFO L82 PathProgramCache]: Analyzing trace with hash 983172312, now seen corresponding path program 1 times [2021-01-06 19:43:49,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:43:49,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340900709] [2021-01-06 19:43:49,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:43:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:43:49,362 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 19:43:49,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340900709] [2021-01-06 19:43:49,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:43:49,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:43:49,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992025212] [2021-01-06 19:43:49,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:43:49,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:43:49,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:43:49,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:43:49,366 INFO L87 Difference]: Start difference. First operand 115 states and 169 transitions. Second operand 3 states. [2021-01-06 19:43:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:43:49,401 INFO L93 Difference]: Finished difference Result 275 states and 421 transitions. [2021-01-06 19:43:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:43:49,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2021-01-06 19:43:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:43:49,404 INFO L225 Difference]: With dead ends: 275 [2021-01-06 19:43:49,404 INFO L226 Difference]: Without dead ends: 183 [2021-01-06 19:43:49,405 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 19:43:49,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-01-06 19:43:49,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2021-01-06 19:43:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 19:43:49,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 272 transitions. [2021-01-06 19:43:49,436 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 272 transitions. Word has length 43 [2021-01-06 19:43:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:43:49,437 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 272 transitions. [2021-01-06 19:43:49,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:43:49,437 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 272 transitions. [2021-01-06 19:43:49,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 19:43:49,439 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:43:49,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:43:49,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 19:43:49,439 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:43:49,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:43:49,440 INFO L82 PathProgramCache]: Analyzing trace with hash -14404519, now seen corresponding path program 1 times [2021-01-06 19:43:49,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:43:49,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791032206] [2021-01-06 19:43:49,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:43:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:43:49,655 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 19:43:49,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791032206] [2021-01-06 19:43:49,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:43:49,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:43:49,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702433286] [2021-01-06 19:43:49,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:43:49,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:43:49,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:43:49,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:43:49,664 INFO L87 Difference]: Start difference. First operand 181 states and 272 transitions. Second operand 5 states. [2021-01-06 19:43:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:43:49,870 INFO L93 Difference]: Finished difference Result 607 states and 937 transitions. [2021-01-06 19:43:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:43:49,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2021-01-06 19:43:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:43:49,880 INFO L225 Difference]: With dead ends: 607 [2021-01-06 19:43:49,880 INFO L226 Difference]: Without dead ends: 449 [2021-01-06 19:43:49,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 19:43:49,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-01-06 19:43:49,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 445. [2021-01-06 19:43:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2021-01-06 19:43:49,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 682 transitions. [2021-01-06 19:43:49,976 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 682 transitions. Word has length 44 [2021-01-06 19:43:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:43:49,976 INFO L481 AbstractCegarLoop]: Abstraction has 445 states and 682 transitions. [2021-01-06 19:43:49,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:43:49,977 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 682 transitions. [2021-01-06 19:43:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 19:43:49,981 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:43:49,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:43:49,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 19:43:49,983 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:43:49,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:43:49,984 INFO L82 PathProgramCache]: Analyzing trace with hash 795739509, now seen corresponding path program 1 times [2021-01-06 19:43:49,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:43:49,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561232320] [2021-01-06 19:43:49,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:43:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:43:50,087 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 19:43:50,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561232320] [2021-01-06 19:43:50,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:43:50,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:43:50,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017495056] [2021-01-06 19:43:50,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:43:50,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:43:50,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:43:50,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:43:50,091 INFO L87 Difference]: Start difference. First operand 445 states and 682 transitions. Second operand 3 states. [2021-01-06 19:43:50,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:43:50,162 INFO L93 Difference]: Finished difference Result 1133 states and 1744 transitions. [2021-01-06 19:43:50,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:43:50,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2021-01-06 19:43:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:43:50,169 INFO L225 Difference]: With dead ends: 1133 [2021-01-06 19:43:50,170 INFO L226 Difference]: Without dead ends: 711 [2021-01-06 19:43:50,172 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 19:43:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-01-06 19:43:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 709. [2021-01-06 19:43:50,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2021-01-06 19:43:50,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1072 transitions. [2021-01-06 19:43:50,214 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1072 transitions. Word has length 45 [2021-01-06 19:43:50,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:43:50,215 INFO L481 AbstractCegarLoop]: Abstraction has 709 states and 1072 transitions. [2021-01-06 19:43:50,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:43:50,215 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1072 transitions. [2021-01-06 19:43:50,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 19:43:50,216 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:43:50,217 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, 1, 1, 1, 1, 1] [2021-01-06 19:43:50,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 19:43:50,217 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:43:50,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:43:50,218 INFO L82 PathProgramCache]: Analyzing trace with hash -220386493, now seen corresponding path program 1 times [2021-01-06 19:43:50,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:43:50,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968767647] [2021-01-06 19:43:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:43:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:43:50,331 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 19:43:50,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968767647] [2021-01-06 19:43:50,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:43:50,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:43:50,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396420951] [2021-01-06 19:43:50,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:43:50,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:43:50,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:43:50,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:43:50,336 INFO L87 Difference]: Start difference. First operand 709 states and 1072 transitions. Second operand 5 states. [2021-01-06 19:43:50,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:43:50,480 INFO L93 Difference]: Finished difference Result 2801 states and 4268 transitions. [2021-01-06 19:43:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:43:50,481 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2021-01-06 19:43:50,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:43:50,495 INFO L225 Difference]: With dead ends: 2801 [2021-01-06 19:43:50,496 INFO L226 Difference]: Without dead ends: 2115 [2021-01-06 19:43:50,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:43:50,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-01-06 19:43:50,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1393. [2021-01-06 19:43:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1393 states. [2021-01-06 19:43:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2072 transitions. [2021-01-06 19:43:50,580 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2072 transitions. Word has length 45 [2021-01-06 19:43:50,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:43:50,582 INFO L481 AbstractCegarLoop]: Abstraction has 1393 states and 2072 transitions. [2021-01-06 19:43:50,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:43:50,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2072 transitions. [2021-01-06 19:43:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 19:43:50,586 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:43:50,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:43:50,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 19:43:50,586 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:43:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:43:50,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1374629896, now seen corresponding path program 1 times [2021-01-06 19:43:50,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:43:50,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465051337] [2021-01-06 19:43:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:43:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:43:50,705 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 19:43:50,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465051337] [2021-01-06 19:43:50,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:43:50,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 19:43:50,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895342918] [2021-01-06 19:43:50,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:43:50,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:43:50,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:43:50,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:43:50,708 INFO L87 Difference]: Start difference. First operand 1393 states and 2072 transitions. Second operand 8 states. [2021-01-06 19:43:50,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:43:50,983 INFO L93 Difference]: Finished difference Result 2955 states and 4313 transitions. [2021-01-06 19:43:50,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 19:43:50,984 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2021-01-06 19:43:50,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:43:51,000 INFO L225 Difference]: With dead ends: 2955 [2021-01-06 19:43:51,001 INFO L226 Difference]: Without dead ends: 2953 [2021-01-06 19:43:51,003 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 19:43:51,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2021-01-06 19:43:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 1537. [2021-01-06 19:43:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1537 states. [2021-01-06 19:43:51,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2216 transitions. [2021-01-06 19:43:51,122 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2216 transitions. Word has length 46 [2021-01-06 19:43:51,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:43:51,122 INFO L481 AbstractCegarLoop]: Abstraction has 1537 states and 2216 transitions. [2021-01-06 19:43:51,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:43:51,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2216 transitions. [2021-01-06 19:43:51,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 19:43:51,124 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:43:51,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:43:51,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 19:43:51,124 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:43:51,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:43:51,125 INFO L82 PathProgramCache]: Analyzing trace with hash -283567685, now seen corresponding path program 1 times [2021-01-06 19:43:51,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:43:51,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937629855] [2021-01-06 19:43:51,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:43:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:43:51,201 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 19:43:51,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937629855] [2021-01-06 19:43:51,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:43:51,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:43:51,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060514403] [2021-01-06 19:43:51,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:43:51,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:43:51,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:43:51,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:43:51,204 INFO L87 Difference]: Start difference. First operand 1537 states and 2216 transitions. Second operand 3 states. [2021-01-06 19:43:51,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:43:51,346 INFO L93 Difference]: Finished difference Result 3671 states and 5308 transitions. [2021-01-06 19:43:51,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:43:51,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2021-01-06 19:43:51,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:43:51,358 INFO L225 Difference]: With dead ends: 3671 [2021-01-06 19:43:51,359 INFO L226 Difference]: Without dead ends: 2157 [2021-01-06 19:43:51,361 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 19:43:51,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-01-06 19:43:51,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 2135. [2021-01-06 19:43:51,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2135 states. [2021-01-06 19:43:51,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3054 transitions. [2021-01-06 19:43:51,507 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3054 transitions. Word has length 47 [2021-01-06 19:43:51,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:43:51,507 INFO L481 AbstractCegarLoop]: Abstraction has 2135 states and 3054 transitions. [2021-01-06 19:43:51,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:43:51,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3054 transitions. [2021-01-06 19:43:51,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 19:43:51,510 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:43:51,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:43:51,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 19:43:51,511 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:43:51,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:43:51,512 INFO L82 PathProgramCache]: Analyzing trace with hash -464590397, now seen corresponding path program 1 times [2021-01-06 19:43:51,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:43:51,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550653055] [2021-01-06 19:43:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:43:51,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:43:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:43:51,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550653055] [2021-01-06 19:43:51,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12915232] [2021-01-06 19:43:51,756 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 19:43:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:43:51,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 19:43:51,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:43:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:43:52,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:43:52,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2021-01-06 19:43:52,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890615967] [2021-01-06 19:43:52,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 19:43:52,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:43:52,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 19:43:52,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:43:52,116 INFO L87 Difference]: Start difference. First operand 2135 states and 3054 transitions. Second operand 12 states. [2021-01-06 19:43:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:43:56,659 INFO L93 Difference]: Finished difference Result 16929 states and 23872 transitions. [2021-01-06 19:43:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 19:43:56,660 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2021-01-06 19:43:56,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:43:56,736 INFO L225 Difference]: With dead ends: 16929 [2021-01-06 19:43:56,737 INFO L226 Difference]: Without dead ends: 14819 [2021-01-06 19:43:56,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=666, Invalid=2640, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 19:43:56,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14819 states. [2021-01-06 19:43:57,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14819 to 7871. [2021-01-06 19:43:57,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7871 states. [2021-01-06 19:43:57,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7871 states to 7871 states and 11054 transitions. [2021-01-06 19:43:57,432 INFO L78 Accepts]: Start accepts. Automaton has 7871 states and 11054 transitions. Word has length 67 [2021-01-06 19:43:57,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:43:57,433 INFO L481 AbstractCegarLoop]: Abstraction has 7871 states and 11054 transitions. [2021-01-06 19:43:57,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 19:43:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 7871 states and 11054 transitions. [2021-01-06 19:43:57,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 19:43:57,437 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:43:57,437 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 19:43:57,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 19:43:57,652 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:43:57,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:43:57,653 INFO L82 PathProgramCache]: Analyzing trace with hash -360407612, now seen corresponding path program 1 times [2021-01-06 19:43:57,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:43:57,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207527444] [2021-01-06 19:43:57,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:43:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:43:57,763 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 19:43:57,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207527444] [2021-01-06 19:43:57,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:43:57,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:43:57,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213105386] [2021-01-06 19:43:57,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:43:57,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:43:57,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:43:57,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:43:57,770 INFO L87 Difference]: Start difference. First operand 7871 states and 11054 transitions. Second operand 3 states. [2021-01-06 19:43:58,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:43:58,440 INFO L93 Difference]: Finished difference Result 17430 states and 24438 transitions. [2021-01-06 19:43:58,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:43:58,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2021-01-06 19:43:58,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:43:58,492 INFO L225 Difference]: With dead ends: 17430 [2021-01-06 19:43:58,492 INFO L226 Difference]: Without dead ends: 11722 [2021-01-06 19:43:58,502 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 19:43:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11722 states. [2021-01-06 19:43:59,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11722 to 11720. [2021-01-06 19:43:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11720 states. [2021-01-06 19:43:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11720 states to 11720 states and 16152 transitions. [2021-01-06 19:43:59,491 INFO L78 Accepts]: Start accepts. Automaton has 11720 states and 16152 transitions. Word has length 67 [2021-01-06 19:43:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:43:59,491 INFO L481 AbstractCegarLoop]: Abstraction has 11720 states and 16152 transitions. [2021-01-06 19:43:59,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:43:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 11720 states and 16152 transitions. [2021-01-06 19:43:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 19:43:59,496 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:43:59,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:43:59,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 19:43:59,497 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:43:59,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:43:59,498 INFO L82 PathProgramCache]: Analyzing trace with hash 445941124, now seen corresponding path program 1 times [2021-01-06 19:43:59,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:43:59,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60468159] [2021-01-06 19:43:59,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:43:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:43:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:43:59,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60468159] [2021-01-06 19:43:59,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:43:59,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:43:59,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996203115] [2021-01-06 19:43:59,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:43:59,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:43:59,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:43:59,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:43:59,575 INFO L87 Difference]: Start difference. First operand 11720 states and 16152 transitions. Second operand 3 states. [2021-01-06 19:44:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:44:00,423 INFO L93 Difference]: Finished difference Result 23659 states and 32400 transitions. [2021-01-06 19:44:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:44:00,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2021-01-06 19:44:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:44:00,465 INFO L225 Difference]: With dead ends: 23659 [2021-01-06 19:44:00,465 INFO L226 Difference]: Without dead ends: 16111 [2021-01-06 19:44:00,542 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 19:44:00,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16111 states. [2021-01-06 19:44:01,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16111 to 16109. [2021-01-06 19:44:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16109 states. [2021-01-06 19:44:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16109 states to 16109 states and 21796 transitions. [2021-01-06 19:44:01,657 INFO L78 Accepts]: Start accepts. Automaton has 16109 states and 21796 transitions. Word has length 67 [2021-01-06 19:44:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:44:01,657 INFO L481 AbstractCegarLoop]: Abstraction has 16109 states and 21796 transitions. [2021-01-06 19:44:01,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:44:01,657 INFO L276 IsEmpty]: Start isEmpty. Operand 16109 states and 21796 transitions. [2021-01-06 19:44:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 19:44:01,663 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:44:01,664 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:44:01,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 19:44:01,664 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:44:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:44:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash 873287188, now seen corresponding path program 1 times [2021-01-06 19:44:01,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:44:01,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125950249] [2021-01-06 19:44:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:44:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 19:44:01,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125950249] [2021-01-06 19:44:01,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:44:01,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:44:01,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293247121] [2021-01-06 19:44:01,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:44:01,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:44:01,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:44:01,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:44:01,798 INFO L87 Difference]: Start difference. First operand 16109 states and 21796 transitions. Second operand 5 states. [2021-01-06 19:44:03,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:44:03,030 INFO L93 Difference]: Finished difference Result 28133 states and 38246 transitions. [2021-01-06 19:44:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:44:03,031 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2021-01-06 19:44:03,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:44:03,088 INFO L225 Difference]: With dead ends: 28133 [2021-01-06 19:44:03,089 INFO L226 Difference]: Without dead ends: 23339 [2021-01-06 19:44:03,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 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 19:44:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23339 states. [2021-01-06 19:44:04,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23339 to 20637. [2021-01-06 19:44:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20637 states. [2021-01-06 19:44:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20637 states to 20637 states and 27834 transitions. [2021-01-06 19:44:04,220 INFO L78 Accepts]: Start accepts. Automaton has 20637 states and 27834 transitions. Word has length 67 [2021-01-06 19:44:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:44:04,220 INFO L481 AbstractCegarLoop]: Abstraction has 20637 states and 27834 transitions. [2021-01-06 19:44:04,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:44:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 20637 states and 27834 transitions. [2021-01-06 19:44:04,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 19:44:04,227 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:44:04,227 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:44:04,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-01-06 19:44:04,227 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:44:04,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:44:04,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1380691940, now seen corresponding path program 1 times [2021-01-06 19:44:04,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:44:04,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185585277] [2021-01-06 19:44:04,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:44:04,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:44:04,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185585277] [2021-01-06 19:44:04,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:44:04,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:44:04,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281235270] [2021-01-06 19:44:04,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:44:04,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:44:04,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:44:04,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:44:04,301 INFO L87 Difference]: Start difference. First operand 20637 states and 27834 transitions. Second operand 6 states. [2021-01-06 19:44:06,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:44:06,180 INFO L93 Difference]: Finished difference Result 51647 states and 69366 transitions. [2021-01-06 19:44:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:44:06,180 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2021-01-06 19:44:06,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:44:06,245 INFO L225 Difference]: With dead ends: 51647 [2021-01-06 19:44:06,245 INFO L226 Difference]: Without dead ends: 31047 [2021-01-06 19:44:06,274 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 19:44:06,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31047 states. [2021-01-06 19:44:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31047 to 29450. [2021-01-06 19:44:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29450 states. [2021-01-06 19:44:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29450 states to 29450 states and 39166 transitions. [2021-01-06 19:44:08,111 INFO L78 Accepts]: Start accepts. Automaton has 29450 states and 39166 transitions. Word has length 67 [2021-01-06 19:44:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:44:08,111 INFO L481 AbstractCegarLoop]: Abstraction has 29450 states and 39166 transitions. [2021-01-06 19:44:08,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:44:08,111 INFO L276 IsEmpty]: Start isEmpty. Operand 29450 states and 39166 transitions. [2021-01-06 19:44:08,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 19:44:08,117 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:44:08,118 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:44:08,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-01-06 19:44:08,118 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:44:08,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:44:08,118 INFO L82 PathProgramCache]: Analyzing trace with hash -986325154, now seen corresponding path program 1 times [2021-01-06 19:44:08,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:44:08,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273696831] [2021-01-06 19:44:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:44:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:44:08,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273696831] [2021-01-06 19:44:08,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:44:08,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:44:08,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705182072] [2021-01-06 19:44:08,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:44:08,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:44:08,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:44:08,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:44:08,199 INFO L87 Difference]: Start difference. First operand 29450 states and 39166 transitions. Second operand 5 states. [2021-01-06 19:44:10,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:44:10,341 INFO L93 Difference]: Finished difference Result 49120 states and 65840 transitions. [2021-01-06 19:44:10,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:44:10,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2021-01-06 19:44:10,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:44:10,436 INFO L225 Difference]: With dead ends: 49120 [2021-01-06 19:44:10,436 INFO L226 Difference]: Without dead ends: 39623 [2021-01-06 19:44:10,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 19:44:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39623 states. [2021-01-06 19:44:12,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39623 to 36937. [2021-01-06 19:44:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36937 states. [2021-01-06 19:44:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36937 states to 36937 states and 49000 transitions. [2021-01-06 19:44:12,764 INFO L78 Accepts]: Start accepts. Automaton has 36937 states and 49000 transitions. Word has length 67 [2021-01-06 19:44:12,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:44:12,764 INFO L481 AbstractCegarLoop]: Abstraction has 36937 states and 49000 transitions. [2021-01-06 19:44:12,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:44:12,765 INFO L276 IsEmpty]: Start isEmpty. Operand 36937 states and 49000 transitions. [2021-01-06 19:44:12,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 19:44:12,772 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:44:12,772 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:44:12,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-01-06 19:44:12,773 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:44:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:44:12,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1025819592, now seen corresponding path program 1 times [2021-01-06 19:44:12,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:44:12,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412195755] [2021-01-06 19:44:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:44:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 19:44:12,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412195755] [2021-01-06 19:44:12,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:44:12,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:44:12,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498273447] [2021-01-06 19:44:12,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:44:12,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:44:12,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:44:12,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:44:12,838 INFO L87 Difference]: Start difference. First operand 36937 states and 49000 transitions. Second operand 6 states. [2021-01-06 19:44:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:44:15,579 INFO L93 Difference]: Finished difference Result 84381 states and 112508 transitions. [2021-01-06 19:44:15,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:44:15,579 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2021-01-06 19:44:15,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:44:15,642 INFO L225 Difference]: With dead ends: 84381 [2021-01-06 19:44:15,643 INFO L226 Difference]: Without dead ends: 47476 [2021-01-06 19:44:15,675 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 19:44:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47476 states. [2021-01-06 19:44:18,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47476 to 42544. [2021-01-06 19:44:18,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42544 states. [2021-01-06 19:44:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42544 states to 42544 states and 56217 transitions. [2021-01-06 19:44:18,113 INFO L78 Accepts]: Start accepts. Automaton has 42544 states and 56217 transitions. Word has length 68 [2021-01-06 19:44:18,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:44:18,113 INFO L481 AbstractCegarLoop]: Abstraction has 42544 states and 56217 transitions. [2021-01-06 19:44:18,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:44:18,113 INFO L276 IsEmpty]: Start isEmpty. Operand 42544 states and 56217 transitions. [2021-01-06 19:44:18,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-01-06 19:44:18,118 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:44:18,118 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:44:18,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-01-06 19:44:18,118 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:44:18,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:44:18,119 INFO L82 PathProgramCache]: Analyzing trace with hash 4680138, now seen corresponding path program 1 times [2021-01-06 19:44:18,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:44:18,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302742257] [2021-01-06 19:44:18,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:44:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:44:18,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302742257] [2021-01-06 19:44:18,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:44:18,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:44:18,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426091149] [2021-01-06 19:44:18,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:44:18,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:44:18,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:44:18,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:44:18,344 INFO L87 Difference]: Start difference. First operand 42544 states and 56217 transitions. Second operand 3 states. [2021-01-06 19:44:20,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:44:20,792 INFO L93 Difference]: Finished difference Result 56906 states and 74791 transitions. [2021-01-06 19:44:20,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:44:20,792 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2021-01-06 19:44:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:44:20,841 INFO L225 Difference]: With dead ends: 56906 [2021-01-06 19:44:20,841 INFO L226 Difference]: Without dead ends: 36160 [2021-01-06 19:44:20,855 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 19:44:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36160 states. [2021-01-06 19:44:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36160 to 31278. [2021-01-06 19:44:22,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31278 states. [2021-01-06 19:44:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31278 states to 31278 states and 40619 transitions. [2021-01-06 19:44:22,483 INFO L78 Accepts]: Start accepts. Automaton has 31278 states and 40619 transitions. Word has length 68 [2021-01-06 19:44:22,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:44:22,483 INFO L481 AbstractCegarLoop]: Abstraction has 31278 states and 40619 transitions. [2021-01-06 19:44:22,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:44:22,483 INFO L276 IsEmpty]: Start isEmpty. Operand 31278 states and 40619 transitions. [2021-01-06 19:44:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 19:44:22,488 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:44:22,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:44:22,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-01-06 19:44:22,488 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:44:22,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:44:22,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1858577065, now seen corresponding path program 1 times [2021-01-06 19:44:22,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:44:22,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620452965] [2021-01-06 19:44:22,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:44:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:44:22,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620452965] [2021-01-06 19:44:22,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:44:22,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:44:22,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690199661] [2021-01-06 19:44:22,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:44:22,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:44:22,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:44:22,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:44:22,560 INFO L87 Difference]: Start difference. First operand 31278 states and 40619 transitions. Second operand 5 states. [2021-01-06 19:44:24,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:44:24,779 INFO L93 Difference]: Finished difference Result 39823 states and 52073 transitions. [2021-01-06 19:44:24,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:44:24,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2021-01-06 19:44:24,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:44:24,818 INFO L225 Difference]: With dead ends: 39823 [2021-01-06 19:44:24,818 INFO L226 Difference]: Without dead ends: 36064 [2021-01-06 19:44:24,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 19:44:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36064 states. [2021-01-06 19:44:26,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36064 to 33966. [2021-01-06 19:44:26,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33966 states. [2021-01-06 19:44:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33966 states to 33966 states and 44089 transitions. [2021-01-06 19:44:26,666 INFO L78 Accepts]: Start accepts. Automaton has 33966 states and 44089 transitions. Word has length 69 [2021-01-06 19:44:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:44:26,666 INFO L481 AbstractCegarLoop]: Abstraction has 33966 states and 44089 transitions. [2021-01-06 19:44:26,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:44:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 33966 states and 44089 transitions. [2021-01-06 19:44:26,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 19:44:26,671 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:44:26,671 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:44:26,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-01-06 19:44:26,671 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:44:26,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:44:26,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2123891639, now seen corresponding path program 1 times [2021-01-06 19:44:26,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:44:26,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098344387] [2021-01-06 19:44:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:44:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:44:26,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098344387] [2021-01-06 19:44:26,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:44:26,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:44:26,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333105040] [2021-01-06 19:44:26,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:44:26,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:44:26,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:44:26,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:44:26,737 INFO L87 Difference]: Start difference. First operand 33966 states and 44089 transitions. Second operand 3 states. [2021-01-06 19:44:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:44:28,837 INFO L93 Difference]: Finished difference Result 63056 states and 81421 transitions. [2021-01-06 19:44:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:44:28,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2021-01-06 19:44:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:44:28,877 INFO L225 Difference]: With dead ends: 63056 [2021-01-06 19:44:28,877 INFO L226 Difference]: Without dead ends: 34688 [2021-01-06 19:44:28,897 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 19:44:28,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34688 states. [2021-01-06 19:44:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34688 to 34030. [2021-01-06 19:44:30,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34030 states. [2021-01-06 19:44:30,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34030 states to 34030 states and 43723 transitions. [2021-01-06 19:44:30,776 INFO L78 Accepts]: Start accepts. Automaton has 34030 states and 43723 transitions. Word has length 70 [2021-01-06 19:44:30,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:44:30,777 INFO L481 AbstractCegarLoop]: Abstraction has 34030 states and 43723 transitions. [2021-01-06 19:44:30,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:44:30,777 INFO L276 IsEmpty]: Start isEmpty. Operand 34030 states and 43723 transitions. [2021-01-06 19:44:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 19:44:30,781 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:44:30,781 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:44:30,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-01-06 19:44:30,781 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:44:30,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:44:30,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1317965525, now seen corresponding path program 1 times [2021-01-06 19:44:30,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:44:30,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11979630] [2021-01-06 19:44:30,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:44:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:44:30,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11979630] [2021-01-06 19:44:30,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277118213] [2021-01-06 19:44:30,861 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 19:44:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:30,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 19:44:30,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:44:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:44:31,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:44:31,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 19:44:31,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976977107] [2021-01-06 19:44:31,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 19:44:31,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:44:31,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 19:44:31,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:44:31,181 INFO L87 Difference]: Start difference. First operand 34030 states and 43723 transitions. Second operand 11 states. [2021-01-06 19:44:34,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:44:34,993 INFO L93 Difference]: Finished difference Result 86981 states and 111985 transitions. [2021-01-06 19:44:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 19:44:34,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2021-01-06 19:44:34,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:44:35,059 INFO L225 Difference]: With dead ends: 86981 [2021-01-06 19:44:35,060 INFO L226 Difference]: Without dead ends: 60659 [2021-01-06 19:44:35,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:44:35,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60659 states. [2021-01-06 19:44:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60659 to 36596. [2021-01-06 19:44:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36596 states. [2021-01-06 19:44:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36596 states to 36596 states and 47074 transitions. [2021-01-06 19:44:37,627 INFO L78 Accepts]: Start accepts. Automaton has 36596 states and 47074 transitions. Word has length 71 [2021-01-06 19:44:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:44:37,627 INFO L481 AbstractCegarLoop]: Abstraction has 36596 states and 47074 transitions. [2021-01-06 19:44:37,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 19:44:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 36596 states and 47074 transitions. [2021-01-06 19:44:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 19:44:37,632 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:44:37,632 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:44:37,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:44:37,838 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:44:37,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:44:37,839 INFO L82 PathProgramCache]: Analyzing trace with hash 487943403, now seen corresponding path program 1 times [2021-01-06 19:44:37,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:44:37,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960324159] [2021-01-06 19:44:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:44:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:44:37,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960324159] [2021-01-06 19:44:37,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487804244] [2021-01-06 19:44:37,922 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 19:44:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:38,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 19:44:38,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:44:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:44:38,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:44:38,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 19:44:38,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289739303] [2021-01-06 19:44:38,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 19:44:38,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:44:38,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 19:44:38,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:44:38,188 INFO L87 Difference]: Start difference. First operand 36596 states and 47074 transitions. Second operand 11 states. [2021-01-06 19:44:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:44:41,378 INFO L93 Difference]: Finished difference Result 60934 states and 78113 transitions. [2021-01-06 19:44:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 19:44:41,378 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2021-01-06 19:44:41,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:44:41,422 INFO L225 Difference]: With dead ends: 60934 [2021-01-06 19:44:41,422 INFO L226 Difference]: Without dead ends: 48465 [2021-01-06 19:44:41,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:44:41,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48465 states. [2021-01-06 19:44:43,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48465 to 37103. [2021-01-06 19:44:43,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37103 states. [2021-01-06 19:44:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37103 states to 37103 states and 47474 transitions. [2021-01-06 19:44:43,958 INFO L78 Accepts]: Start accepts. Automaton has 37103 states and 47474 transitions. Word has length 72 [2021-01-06 19:44:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:44:43,959 INFO L481 AbstractCegarLoop]: Abstraction has 37103 states and 47474 transitions. [2021-01-06 19:44:43,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 19:44:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 37103 states and 47474 transitions. [2021-01-06 19:44:43,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 19:44:43,965 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:44:43,965 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:44:44,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:44:44,172 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:44:44,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:44:44,173 INFO L82 PathProgramCache]: Analyzing trace with hash -2057872568, now seen corresponding path program 1 times [2021-01-06 19:44:44,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:44:44,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950662749] [2021-01-06 19:44:44,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:44:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:44:44,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950662749] [2021-01-06 19:44:44,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749419970] [2021-01-06 19:44:44,268 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 19:44:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:44,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 19:44:44,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:44:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:44:44,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:44:44,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-01-06 19:44:44,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892309019] [2021-01-06 19:44:44,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 19:44:44,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:44:44,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 19:44:44,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:44:44,534 INFO L87 Difference]: Start difference. First operand 37103 states and 47474 transitions. Second operand 11 states. [2021-01-06 19:44:49,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:44:49,863 INFO L93 Difference]: Finished difference Result 99544 states and 126845 transitions. [2021-01-06 19:44:49,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 19:44:49,864 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2021-01-06 19:44:49,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:44:49,948 INFO L225 Difference]: With dead ends: 99544 [2021-01-06 19:44:49,948 INFO L226 Difference]: Without dead ends: 72704 [2021-01-06 19:44:49,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:44:50,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72704 states. [2021-01-06 19:44:53,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72704 to 43260. [2021-01-06 19:44:53,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43260 states. [2021-01-06 19:44:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43260 states to 43260 states and 55382 transitions. [2021-01-06 19:44:53,420 INFO L78 Accepts]: Start accepts. Automaton has 43260 states and 55382 transitions. Word has length 73 [2021-01-06 19:44:53,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:44:53,420 INFO L481 AbstractCegarLoop]: Abstraction has 43260 states and 55382 transitions. [2021-01-06 19:44:53,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 19:44:53,420 INFO L276 IsEmpty]: Start isEmpty. Operand 43260 states and 55382 transitions. [2021-01-06 19:44:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 19:44:53,426 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:44:53,426 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:44:53,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:44:53,628 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:44:53,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:44:53,628 INFO L82 PathProgramCache]: Analyzing trace with hash 248844961, now seen corresponding path program 1 times [2021-01-06 19:44:53,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:44:53,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536718153] [2021-01-06 19:44:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:44:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:53,888 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 19:44:53,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536718153] [2021-01-06 19:44:53,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232046377] [2021-01-06 19:44:53,889 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 19:44:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:44:54,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 19:44:54,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:44:54,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 19:44:54,519 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 19:44:54,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:44:54,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 19:44:54,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499414587] [2021-01-06 19:44:54,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:44:54,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:44:54,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:44:54,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:44:54,522 INFO L87 Difference]: Start difference. First operand 43260 states and 55382 transitions. Second operand 17 states. [2021-01-06 19:45:05,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:45:05,427 INFO L93 Difference]: Finished difference Result 160460 states and 203101 transitions. [2021-01-06 19:45:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 19:45:05,430 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2021-01-06 19:45:05,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:45:05,592 INFO L225 Difference]: With dead ends: 160460 [2021-01-06 19:45:05,593 INFO L226 Difference]: Without dead ends: 120722 [2021-01-06 19:45:05,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=395, Invalid=1087, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 19:45:05,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120722 states. [2021-01-06 19:45:10,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120722 to 63289. [2021-01-06 19:45:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63289 states. [2021-01-06 19:45:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63289 states to 63289 states and 80929 transitions. [2021-01-06 19:45:11,013 INFO L78 Accepts]: Start accepts. Automaton has 63289 states and 80929 transitions. Word has length 73 [2021-01-06 19:45:11,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:45:11,014 INFO L481 AbstractCegarLoop]: Abstraction has 63289 states and 80929 transitions. [2021-01-06 19:45:11,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:45:11,014 INFO L276 IsEmpty]: Start isEmpty. Operand 63289 states and 80929 transitions. [2021-01-06 19:45:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 19:45:11,020 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:45:11,021 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:45:11,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 19:45:11,221 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:45:11,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:45:11,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1368215713, now seen corresponding path program 1 times [2021-01-06 19:45:11,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:45:11,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45555757] [2021-01-06 19:45:11,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:45:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:45:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:45:11,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45555757] [2021-01-06 19:45:11,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824990621] [2021-01-06 19:45:11,452 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 19:45:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:45:11,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 19:45:11,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:45:11,893 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-01-06 19:45:11,931 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 19:45:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:45:12,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:45:12,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 19:45:12,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300475316] [2021-01-06 19:45:12,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:45:12,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:45:12,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:45:12,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:45:12,148 INFO L87 Difference]: Start difference. First operand 63289 states and 80929 transitions. Second operand 17 states. [2021-01-06 19:45:28,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:45:28,050 INFO L93 Difference]: Finished difference Result 222687 states and 284387 transitions. [2021-01-06 19:45:28,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 19:45:28,050 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2021-01-06 19:45:28,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:45:28,334 INFO L225 Difference]: With dead ends: 222687 [2021-01-06 19:45:28,334 INFO L226 Difference]: Without dead ends: 191733 [2021-01-06 19:45:28,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 19:45:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191733 states. [2021-01-06 19:45:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191733 to 114741. [2021-01-06 19:45:38,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114741 states. [2021-01-06 19:45:38,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114741 states to 114741 states and 146825 transitions. [2021-01-06 19:45:38,859 INFO L78 Accepts]: Start accepts. Automaton has 114741 states and 146825 transitions. Word has length 73 [2021-01-06 19:45:38,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:45:38,860 INFO L481 AbstractCegarLoop]: Abstraction has 114741 states and 146825 transitions. [2021-01-06 19:45:38,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:45:38,860 INFO L276 IsEmpty]: Start isEmpty. Operand 114741 states and 146825 transitions. [2021-01-06 19:45:38,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 19:45:38,869 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:45:38,869 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:45:39,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:45:39,083 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:45:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:45:39,084 INFO L82 PathProgramCache]: Analyzing trace with hash -499793487, now seen corresponding path program 1 times [2021-01-06 19:45:39,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:45:39,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012866608] [2021-01-06 19:45:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:45:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:45:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:45:39,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012866608] [2021-01-06 19:45:39,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:45:39,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:45:39,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526067916] [2021-01-06 19:45:39,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:45:39,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:45:39,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:45:39,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:45:39,176 INFO L87 Difference]: Start difference. First operand 114741 states and 146825 transitions. Second operand 3 states. [2021-01-06 19:45:45,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:45:45,064 INFO L93 Difference]: Finished difference Result 181760 states and 232980 transitions. [2021-01-06 19:45:45,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:45:45,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2021-01-06 19:45:45,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:45:45,152 INFO L225 Difference]: With dead ends: 181760 [2021-01-06 19:45:45,153 INFO L226 Difference]: Without dead ends: 67091 [2021-01-06 19:45:45,211 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 19:45:45,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67091 states. [2021-01-06 19:45:50,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67091 to 66329. [2021-01-06 19:45:50,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66329 states. [2021-01-06 19:45:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66329 states to 66329 states and 83878 transitions. [2021-01-06 19:45:51,044 INFO L78 Accepts]: Start accepts. Automaton has 66329 states and 83878 transitions. Word has length 73 [2021-01-06 19:45:51,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:45:51,044 INFO L481 AbstractCegarLoop]: Abstraction has 66329 states and 83878 transitions. [2021-01-06 19:45:51,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:45:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 66329 states and 83878 transitions. [2021-01-06 19:45:51,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 19:45:51,049 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:45:51,049 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:45:51,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-01-06 19:45:51,050 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:45:51,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:45:51,050 INFO L82 PathProgramCache]: Analyzing trace with hash 524210211, now seen corresponding path program 1 times [2021-01-06 19:45:51,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:45:51,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34435521] [2021-01-06 19:45:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:45:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:45:51,126 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 19:45:51,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34435521] [2021-01-06 19:45:51,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:45:51,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:45:51,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447856031] [2021-01-06 19:45:51,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:45:51,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:45:51,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:45:51,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:45:51,131 INFO L87 Difference]: Start difference. First operand 66329 states and 83878 transitions. Second operand 6 states. [2021-01-06 19:45:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:45:57,177 INFO L93 Difference]: Finished difference Result 134998 states and 170746 transitions. [2021-01-06 19:45:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:45:57,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2021-01-06 19:45:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:45:57,266 INFO L225 Difference]: With dead ends: 134998 [2021-01-06 19:45:57,266 INFO L226 Difference]: Without dead ends: 68888 [2021-01-06 19:45:57,310 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 19:45:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68888 states. [2021-01-06 19:46:03,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68888 to 67869. [2021-01-06 19:46:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67869 states. [2021-01-06 19:46:04,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67869 states to 67869 states and 84994 transitions. [2021-01-06 19:46:04,066 INFO L78 Accepts]: Start accepts. Automaton has 67869 states and 84994 transitions. Word has length 73 [2021-01-06 19:46:04,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:04,066 INFO L481 AbstractCegarLoop]: Abstraction has 67869 states and 84994 transitions. [2021-01-06 19:46:04,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:46:04,066 INFO L276 IsEmpty]: Start isEmpty. Operand 67869 states and 84994 transitions. [2021-01-06 19:46:04,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 19:46:04,070 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:04,070 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:46:04,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-01-06 19:46:04,070 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:04,073 INFO L82 PathProgramCache]: Analyzing trace with hash -254072136, now seen corresponding path program 1 times [2021-01-06 19:46:04,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:04,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064362002] [2021-01-06 19:46:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:04,142 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 19:46:04,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064362002] [2021-01-06 19:46:04,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:04,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:46:04,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524599658] [2021-01-06 19:46:04,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:46:04,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:04,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:46:04,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:46:04,144 INFO L87 Difference]: Start difference. First operand 67869 states and 84994 transitions. Second operand 3 states. [2021-01-06 19:46:09,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:09,277 INFO L93 Difference]: Finished difference Result 84262 states and 105413 transitions. [2021-01-06 19:46:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:46:09,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2021-01-06 19:46:09,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:09,348 INFO L225 Difference]: With dead ends: 84262 [2021-01-06 19:46:09,348 INFO L226 Difference]: Without dead ends: 59683 [2021-01-06 19:46:09,365 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 19:46:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59683 states. [2021-01-06 19:46:14,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59683 to 59681. [2021-01-06 19:46:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59681 states. [2021-01-06 19:46:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59681 states to 59681 states and 73483 transitions. [2021-01-06 19:46:14,687 INFO L78 Accepts]: Start accepts. Automaton has 59681 states and 73483 transitions. Word has length 74 [2021-01-06 19:46:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:14,688 INFO L481 AbstractCegarLoop]: Abstraction has 59681 states and 73483 transitions. [2021-01-06 19:46:14,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:46:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 59681 states and 73483 transitions. [2021-01-06 19:46:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 19:46:14,692 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:14,692 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:46:14,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-01-06 19:46:14,692 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:14,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:14,692 INFO L82 PathProgramCache]: Analyzing trace with hash 1183068259, now seen corresponding path program 1 times [2021-01-06 19:46:14,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:14,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661779376] [2021-01-06 19:46:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:14,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 19:46:14,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661779376] [2021-01-06 19:46:14,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:14,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:46:14,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847975407] [2021-01-06 19:46:14,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:46:14,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:14,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:46:14,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:46:14,734 INFO L87 Difference]: Start difference. First operand 59681 states and 73483 transitions. Second operand 3 states. [2021-01-06 19:46:19,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:19,541 INFO L93 Difference]: Finished difference Result 77359 states and 95552 transitions. [2021-01-06 19:46:19,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:46:19,542 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2021-01-06 19:46:19,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:19,601 INFO L225 Difference]: With dead ends: 77359 [2021-01-06 19:46:19,602 INFO L226 Difference]: Without dead ends: 55588 [2021-01-06 19:46:19,616 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 19:46:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55588 states. [2021-01-06 19:46:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55588 to 55488. [2021-01-06 19:46:24,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55488 states. [2021-01-06 19:46:24,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55488 states to 55488 states and 68328 transitions. [2021-01-06 19:46:24,605 INFO L78 Accepts]: Start accepts. Automaton has 55488 states and 68328 transitions. Word has length 75 [2021-01-06 19:46:24,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:24,605 INFO L481 AbstractCegarLoop]: Abstraction has 55488 states and 68328 transitions. [2021-01-06 19:46:24,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:46:24,605 INFO L276 IsEmpty]: Start isEmpty. Operand 55488 states and 68328 transitions. [2021-01-06 19:46:24,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 19:46:24,608 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:24,608 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:46:24,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-01-06 19:46:24,609 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:24,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:24,609 INFO L82 PathProgramCache]: Analyzing trace with hash 2136968102, now seen corresponding path program 1 times [2021-01-06 19:46:24,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:24,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550761552] [2021-01-06 19:46:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:24,653 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:46:24,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550761552] [2021-01-06 19:46:24,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:46:24,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:46:24,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206693647] [2021-01-06 19:46:24,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:46:24,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:46:24,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:46:24,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:46:24,656 INFO L87 Difference]: Start difference. First operand 55488 states and 68328 transitions. Second operand 3 states. [2021-01-06 19:46:27,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:46:27,363 INFO L93 Difference]: Finished difference Result 79647 states and 98458 transitions. [2021-01-06 19:46:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:46:27,363 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2021-01-06 19:46:27,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:46:27,394 INFO L225 Difference]: With dead ends: 79647 [2021-01-06 19:46:27,394 INFO L226 Difference]: Without dead ends: 28497 [2021-01-06 19:46:27,412 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 19:46:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28497 states. [2021-01-06 19:46:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28497 to 27849. [2021-01-06 19:46:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27849 states. [2021-01-06 19:46:29,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27849 states to 27849 states and 33576 transitions. [2021-01-06 19:46:29,975 INFO L78 Accepts]: Start accepts. Automaton has 27849 states and 33576 transitions. Word has length 75 [2021-01-06 19:46:29,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:46:29,975 INFO L481 AbstractCegarLoop]: Abstraction has 27849 states and 33576 transitions. [2021-01-06 19:46:29,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:46:29,975 INFO L276 IsEmpty]: Start isEmpty. Operand 27849 states and 33576 transitions. [2021-01-06 19:46:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 19:46:29,977 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:46:29,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:46:29,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-01-06 19:46:29,978 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:46:29,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:46:29,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1075264897, now seen corresponding path program 1 times [2021-01-06 19:46:29,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:46:29,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974899667] [2021-01-06 19:46:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:46:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:31,004 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 19:46:31,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974899667] [2021-01-06 19:46:31,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41178313] [2021-01-06 19:46:31,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:46:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:46:31,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 19:46:31,126 INFO L286 TraceCheckSpWp]: Computing forward predicates...