/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.3.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:49:16,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:49:16,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:49:16,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:49:16,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:49:16,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:49:16,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:49:16,306 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:49:16,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:49:16,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:49:16,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:49:16,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:49:16,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:49:16,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:49:16,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:49:16,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:49:16,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:49:16,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:49:16,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:49:16,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:49:16,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:49:16,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:49:16,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:49:16,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:49:16,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:49:16,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:49:16,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:49:16,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:49:16,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:49:16,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:49:16,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:49:16,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:49:16,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:49:16,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:49:16,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:49:16,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:49:16,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:49:16,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:49:16,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:49:16,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:49:16,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:49:16,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 09:49:16,385 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:49:16,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:49:16,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:49:16,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:49:16,388 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:49:16,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:49:16,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:49:16,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:49:16,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:49:16,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:49:16,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:49:16,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:49:16,390 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:49:16,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:49:16,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:49:16,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:49:16,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:49:16,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:49:16,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:49:16,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:49:16,391 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:49:16,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:49:16,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:49:16,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:49:16,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:49:16,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:49:16,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:49:16,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:49:16,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:49:16,902 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:49:16,903 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:49:16,904 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2020-12-23 09:49:17,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8f006ea56/75f3213bc90a4da5a8f9f0b6fef41da0/FLAGc2c2c4386 [2020-12-23 09:49:17,760 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:49:17,762 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2020-12-23 09:49:17,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8f006ea56/75f3213bc90a4da5a8f9f0b6fef41da0/FLAGc2c2c4386 [2020-12-23 09:49:18,051 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8f006ea56/75f3213bc90a4da5a8f9f0b6fef41da0 [2020-12-23 09:49:18,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:49:18,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:49:18,060 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:49:18,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:49:18,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:49:18,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:49:18" (1/1) ... [2020-12-23 09:49:18,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73dd1968 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:49:18, skipping insertion in model container [2020-12-23 09:49:18,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:49:18" (1/1) ... [2020-12-23 09:49:18,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:49:18,107 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[~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,] [2020-12-23 09:49:18,362 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.3.1.ufo.UNBOUNDED.pals.c[6940,6953] [2020-12-23 09:49:18,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:49:18,391 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[~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,] [2020-12-23 09:49:18,473 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.3.1.ufo.UNBOUNDED.pals.c[6940,6953] [2020-12-23 09:49:18,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:49:18,498 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:49:18,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:49:18 WrapperNode [2020-12-23 09:49:18,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:49:18,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:49:18,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:49:18,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:49:18,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:49:18" (1/1) ... [2020-12-23 09:49:18,524 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:49:18" (1/1) ... [2020-12-23 09:49:18,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:49:18,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:49:18,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:49:18,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:49:18,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:49:18" (1/1) ... [2020-12-23 09:49:18,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:49:18" (1/1) ... [2020-12-23 09:49:18,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:49:18" (1/1) ... [2020-12-23 09:49:18,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:49:18" (1/1) ... [2020-12-23 09:49:18,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:49:18" (1/1) ... [2020-12-23 09:49:18,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:49:18" (1/1) ... [2020-12-23 09:49:18,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:49:18" (1/1) ... [2020-12-23 09:49:18,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:49:18,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:49:18,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:49:18,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:49:18,681 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:49:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:49:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:49:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:49:18,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:49:18,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:49:19,610 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:49:19,610 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-23 09:49:19,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:49:19 BoogieIcfgContainer [2020-12-23 09:49:19,613 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:49:19,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:49:19,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:49:19,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:49:19,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:49:18" (1/3) ... [2020-12-23 09:49:19,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363a94ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:49:19, skipping insertion in model container [2020-12-23 09:49:19,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:49:18" (2/3) ... [2020-12-23 09:49:19,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@363a94ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:49:19, skipping insertion in model container [2020-12-23 09:49:19,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:49:19" (3/3) ... [2020-12-23 09:49:19,623 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c [2020-12-23 09:49:19,631 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:49:19,644 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:49:19,673 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:49:19,704 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:49:19,704 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:49:19,705 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:49:19,705 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:49:19,705 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:49:19,705 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:49:19,705 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:49:19,706 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:49:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2020-12-23 09:49:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 09:49:19,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:19,737 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] [2020-12-23 09:49:19,737 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:19,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:19,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1546658209, now seen corresponding path program 1 times [2020-12-23 09:49:19,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:19,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939157316] [2020-12-23 09:49:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:20,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:49:20,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939157316] [2020-12-23 09:49:20,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:20,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:49:20,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807002429] [2020-12-23 09:49:20,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:49:20,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:20,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:49:20,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:49:20,214 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 5 states. [2020-12-23 09:49:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:20,452 INFO L93 Difference]: Finished difference Result 137 states and 223 transitions. [2020-12-23 09:49:20,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:49:20,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-23 09:49:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:20,486 INFO L225 Difference]: With dead ends: 137 [2020-12-23 09:49:20,486 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 09:49:20,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:49:20,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 09:49:20,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-12-23 09:49:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 09:49:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2020-12-23 09:49:20,554 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 26 [2020-12-23 09:49:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:20,555 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2020-12-23 09:49:20,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:49:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2020-12-23 09:49:20,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 09:49:20,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:20,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:49:20,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:49:20,560 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:20,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:20,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1146437097, now seen corresponding path program 1 times [2020-12-23 09:49:20,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:20,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090830096] [2020-12-23 09:49:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:49:20,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090830096] [2020-12-23 09:49:20,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:20,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:49:20,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433323309] [2020-12-23 09:49:20,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:49:20,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:20,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:49:20,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:49:20,743 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand 3 states. [2020-12-23 09:49:20,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:20,782 INFO L93 Difference]: Finished difference Result 170 states and 255 transitions. [2020-12-23 09:49:20,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:49:20,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-12-23 09:49:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:20,786 INFO L225 Difference]: With dead ends: 170 [2020-12-23 09:49:20,786 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 09:49:20,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:49:20,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 09:49:20,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2020-12-23 09:49:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 09:49:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 169 transitions. [2020-12-23 09:49:20,803 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 169 transitions. Word has length 42 [2020-12-23 09:49:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:20,804 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 169 transitions. [2020-12-23 09:49:20,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:49:20,804 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 169 transitions. [2020-12-23 09:49:20,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 09:49:20,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:20,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:49:20,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:49:20,807 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:20,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:20,808 INFO L82 PathProgramCache]: Analyzing trace with hash 983172312, now seen corresponding path program 1 times [2020-12-23 09:49:20,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:20,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948322090] [2020-12-23 09:49:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:20,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:49:20,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948322090] [2020-12-23 09:49:20,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:20,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:49:20,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607614036] [2020-12-23 09:49:20,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:49:20,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:20,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:49:20,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:49:20,958 INFO L87 Difference]: Start difference. First operand 115 states and 169 transitions. Second operand 3 states. [2020-12-23 09:49:20,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:20,996 INFO L93 Difference]: Finished difference Result 275 states and 421 transitions. [2020-12-23 09:49:20,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:49:20,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-23 09:49:20,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:21,000 INFO L225 Difference]: With dead ends: 275 [2020-12-23 09:49:21,000 INFO L226 Difference]: Without dead ends: 183 [2020-12-23 09:49:21,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:49:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-23 09:49:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2020-12-23 09:49:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 09:49:21,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 272 transitions. [2020-12-23 09:49:21,023 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 272 transitions. Word has length 43 [2020-12-23 09:49:21,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:21,029 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 272 transitions. [2020-12-23 09:49:21,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:49:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 272 transitions. [2020-12-23 09:49:21,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 09:49:21,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:21,033 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] [2020-12-23 09:49:21,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 09:49:21,034 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:21,034 INFO L82 PathProgramCache]: Analyzing trace with hash -14404519, now seen corresponding path program 1 times [2020-12-23 09:49:21,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:21,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138986748] [2020-12-23 09:49:21,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:49:21,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138986748] [2020-12-23 09:49:21,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:21,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:49:21,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796265298] [2020-12-23 09:49:21,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:49:21,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:21,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:49:21,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:49:21,281 INFO L87 Difference]: Start difference. First operand 181 states and 272 transitions. Second operand 5 states. [2020-12-23 09:49:21,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:21,422 INFO L93 Difference]: Finished difference Result 607 states and 937 transitions. [2020-12-23 09:49:21,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:49:21,423 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-23 09:49:21,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:21,427 INFO L225 Difference]: With dead ends: 607 [2020-12-23 09:49:21,427 INFO L226 Difference]: Without dead ends: 449 [2020-12-23 09:49:21,429 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 [2020-12-23 09:49:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-12-23 09:49:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 445. [2020-12-23 09:49:21,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2020-12-23 09:49:21,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 682 transitions. [2020-12-23 09:49:21,494 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 682 transitions. Word has length 44 [2020-12-23 09:49:21,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:21,495 INFO L481 AbstractCegarLoop]: Abstraction has 445 states and 682 transitions. [2020-12-23 09:49:21,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:49:21,495 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 682 transitions. [2020-12-23 09:49:21,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 09:49:21,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:21,499 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] [2020-12-23 09:49:21,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 09:49:21,501 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:21,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:21,503 INFO L82 PathProgramCache]: Analyzing trace with hash 795739509, now seen corresponding path program 1 times [2020-12-23 09:49:21,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:21,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4640553] [2020-12-23 09:49:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:49:21,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4640553] [2020-12-23 09:49:21,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:21,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:49:21,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438694067] [2020-12-23 09:49:21,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:49:21,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:21,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:49:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:49:21,607 INFO L87 Difference]: Start difference. First operand 445 states and 682 transitions. Second operand 3 states. [2020-12-23 09:49:21,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:21,664 INFO L93 Difference]: Finished difference Result 1133 states and 1744 transitions. [2020-12-23 09:49:21,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:49:21,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-23 09:49:21,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:21,670 INFO L225 Difference]: With dead ends: 1133 [2020-12-23 09:49:21,670 INFO L226 Difference]: Without dead ends: 711 [2020-12-23 09:49:21,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:49:21,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2020-12-23 09:49:21,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 709. [2020-12-23 09:49:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2020-12-23 09:49:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1072 transitions. [2020-12-23 09:49:21,717 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1072 transitions. Word has length 45 [2020-12-23 09:49:21,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:21,717 INFO L481 AbstractCegarLoop]: Abstraction has 709 states and 1072 transitions. [2020-12-23 09:49:21,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:49:21,717 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1072 transitions. [2020-12-23 09:49:21,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 09:49:21,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:21,719 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] [2020-12-23 09:49:21,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 09:49:21,720 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:21,726 INFO L82 PathProgramCache]: Analyzing trace with hash -220386493, now seen corresponding path program 1 times [2020-12-23 09:49:21,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:21,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121415391] [2020-12-23 09:49:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:21,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:49:21,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121415391] [2020-12-23 09:49:21,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:21,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:49:21,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140513294] [2020-12-23 09:49:21,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:49:21,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:21,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:49:21,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:49:21,855 INFO L87 Difference]: Start difference. First operand 709 states and 1072 transitions. Second operand 5 states. [2020-12-23 09:49:22,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:22,072 INFO L93 Difference]: Finished difference Result 2801 states and 4268 transitions. [2020-12-23 09:49:22,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:49:22,073 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-12-23 09:49:22,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:22,090 INFO L225 Difference]: With dead ends: 2801 [2020-12-23 09:49:22,090 INFO L226 Difference]: Without dead ends: 2115 [2020-12-23 09:49:22,093 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 [2020-12-23 09:49:22,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2020-12-23 09:49:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1393. [2020-12-23 09:49:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1393 states. [2020-12-23 09:49:22,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2072 transitions. [2020-12-23 09:49:22,185 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2072 transitions. Word has length 45 [2020-12-23 09:49:22,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:22,188 INFO L481 AbstractCegarLoop]: Abstraction has 1393 states and 2072 transitions. [2020-12-23 09:49:22,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:49:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2072 transitions. [2020-12-23 09:49:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 09:49:22,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:22,192 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] [2020-12-23 09:49:22,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 09:49:22,193 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:22,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1374629896, now seen corresponding path program 1 times [2020-12-23 09:49:22,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:22,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362858322] [2020-12-23 09:49:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:49:22,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362858322] [2020-12-23 09:49:22,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:22,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 09:49:22,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906477988] [2020-12-23 09:49:22,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:49:22,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:22,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:49:22,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:49:22,431 INFO L87 Difference]: Start difference. First operand 1393 states and 2072 transitions. Second operand 8 states. [2020-12-23 09:49:22,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:22,872 INFO L93 Difference]: Finished difference Result 2955 states and 4313 transitions. [2020-12-23 09:49:22,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:49:22,873 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-12-23 09:49:22,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:22,893 INFO L225 Difference]: With dead ends: 2955 [2020-12-23 09:49:22,893 INFO L226 Difference]: Without dead ends: 2953 [2020-12-23 09:49:22,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:49:22,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2020-12-23 09:49:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 1537. [2020-12-23 09:49:23,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1537 states. [2020-12-23 09:49:23,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2216 transitions. [2020-12-23 09:49:23,120 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2216 transitions. Word has length 46 [2020-12-23 09:49:23,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:23,121 INFO L481 AbstractCegarLoop]: Abstraction has 1537 states and 2216 transitions. [2020-12-23 09:49:23,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:49:23,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2216 transitions. [2020-12-23 09:49:23,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 09:49:23,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:23,124 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] [2020-12-23 09:49:23,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 09:49:23,126 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:23,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:23,127 INFO L82 PathProgramCache]: Analyzing trace with hash -283567685, now seen corresponding path program 1 times [2020-12-23 09:49:23,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:23,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15365853] [2020-12-23 09:49:23,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:49:23,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15365853] [2020-12-23 09:49:23,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:23,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:49:23,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030933599] [2020-12-23 09:49:23,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:49:23,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:23,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:49:23,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:49:23,241 INFO L87 Difference]: Start difference. First operand 1537 states and 2216 transitions. Second operand 3 states. [2020-12-23 09:49:23,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:23,417 INFO L93 Difference]: Finished difference Result 3671 states and 5308 transitions. [2020-12-23 09:49:23,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:49:23,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2020-12-23 09:49:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:23,432 INFO L225 Difference]: With dead ends: 3671 [2020-12-23 09:49:23,432 INFO L226 Difference]: Without dead ends: 2157 [2020-12-23 09:49:23,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:49:23,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2020-12-23 09:49:23,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 2135. [2020-12-23 09:49:23,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2135 states. [2020-12-23 09:49:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3054 transitions. [2020-12-23 09:49:23,589 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3054 transitions. Word has length 47 [2020-12-23 09:49:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:23,591 INFO L481 AbstractCegarLoop]: Abstraction has 2135 states and 3054 transitions. [2020-12-23 09:49:23,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:49:23,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3054 transitions. [2020-12-23 09:49:23,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 09:49:23,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:23,596 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] [2020-12-23 09:49:23,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 09:49:23,596 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:23,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:23,597 INFO L82 PathProgramCache]: Analyzing trace with hash -464590397, now seen corresponding path program 1 times [2020-12-23 09:49:23,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:23,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479139521] [2020-12-23 09:49:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:49:23,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479139521] [2020-12-23 09:49:23,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650050840] [2020-12-23 09:49:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:49:24,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:24,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 09:49:24,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:49:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:49:24,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:49:24,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-23 09:49:24,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747903338] [2020-12-23 09:49:24,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 09:49:24,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:24,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 09:49:24,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-23 09:49:24,498 INFO L87 Difference]: Start difference. First operand 2135 states and 3054 transitions. Second operand 12 states. [2020-12-23 09:49:28,862 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-12-23 09:49:29,228 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-12-23 09:49:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:30,613 INFO L93 Difference]: Finished difference Result 16929 states and 23872 transitions. [2020-12-23 09:49:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 09:49:30,614 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-12-23 09:49:30,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:30,689 INFO L225 Difference]: With dead ends: 16929 [2020-12-23 09:49:30,690 INFO L226 Difference]: Without dead ends: 14819 [2020-12-23 09:49:30,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=666, Invalid=2640, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 09:49:30,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14819 states. [2020-12-23 09:49:31,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14819 to 7871. [2020-12-23 09:49:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7871 states. [2020-12-23 09:49:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7871 states to 7871 states and 11054 transitions. [2020-12-23 09:49:31,464 INFO L78 Accepts]: Start accepts. Automaton has 7871 states and 11054 transitions. Word has length 67 [2020-12-23 09:49:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:31,465 INFO L481 AbstractCegarLoop]: Abstraction has 7871 states and 11054 transitions. [2020-12-23 09:49:31,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 09:49:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 7871 states and 11054 transitions. [2020-12-23 09:49:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 09:49:31,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:31,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:49:31,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 09:49:31,685 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:31,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:31,687 INFO L82 PathProgramCache]: Analyzing trace with hash -360407612, now seen corresponding path program 1 times [2020-12-23 09:49:31,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:31,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508613198] [2020-12-23 09:49:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:49:31,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508613198] [2020-12-23 09:49:31,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:31,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:49:31,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120018251] [2020-12-23 09:49:31,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:49:31,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:31,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:49:31,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:49:31,766 INFO L87 Difference]: Start difference. First operand 7871 states and 11054 transitions. Second operand 3 states. [2020-12-23 09:49:32,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:32,482 INFO L93 Difference]: Finished difference Result 17430 states and 24438 transitions. [2020-12-23 09:49:32,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:49:32,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-23 09:49:32,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:32,536 INFO L225 Difference]: With dead ends: 17430 [2020-12-23 09:49:32,536 INFO L226 Difference]: Without dead ends: 11722 [2020-12-23 09:49:32,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:49:32,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11722 states. [2020-12-23 09:49:33,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11722 to 11720. [2020-12-23 09:49:33,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11720 states. [2020-12-23 09:49:33,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11720 states to 11720 states and 16152 transitions. [2020-12-23 09:49:33,527 INFO L78 Accepts]: Start accepts. Automaton has 11720 states and 16152 transitions. Word has length 67 [2020-12-23 09:49:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:33,527 INFO L481 AbstractCegarLoop]: Abstraction has 11720 states and 16152 transitions. [2020-12-23 09:49:33,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:49:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 11720 states and 16152 transitions. [2020-12-23 09:49:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 09:49:33,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:33,533 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] [2020-12-23 09:49:33,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 09:49:33,534 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:33,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:33,535 INFO L82 PathProgramCache]: Analyzing trace with hash 445941124, now seen corresponding path program 1 times [2020-12-23 09:49:33,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:33,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182356129] [2020-12-23 09:49:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:49:33,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182356129] [2020-12-23 09:49:33,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:33,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:49:33,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694182377] [2020-12-23 09:49:33,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:49:33,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:33,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:49:33,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:49:33,611 INFO L87 Difference]: Start difference. First operand 11720 states and 16152 transitions. Second operand 3 states. [2020-12-23 09:49:34,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:34,525 INFO L93 Difference]: Finished difference Result 23659 states and 32400 transitions. [2020-12-23 09:49:34,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:49:34,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-23 09:49:34,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:34,567 INFO L225 Difference]: With dead ends: 23659 [2020-12-23 09:49:34,567 INFO L226 Difference]: Without dead ends: 16111 [2020-12-23 09:49:34,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:49:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16111 states. [2020-12-23 09:49:35,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16111 to 16109. [2020-12-23 09:49:35,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16109 states. [2020-12-23 09:49:35,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16109 states to 16109 states and 21796 transitions. [2020-12-23 09:49:35,566 INFO L78 Accepts]: Start accepts. Automaton has 16109 states and 21796 transitions. Word has length 67 [2020-12-23 09:49:35,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:35,566 INFO L481 AbstractCegarLoop]: Abstraction has 16109 states and 21796 transitions. [2020-12-23 09:49:35,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:49:35,567 INFO L276 IsEmpty]: Start isEmpty. Operand 16109 states and 21796 transitions. [2020-12-23 09:49:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 09:49:35,574 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:35,574 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] [2020-12-23 09:49:35,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 09:49:35,575 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:35,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:35,575 INFO L82 PathProgramCache]: Analyzing trace with hash 873287188, now seen corresponding path program 1 times [2020-12-23 09:49:35,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:35,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133907290] [2020-12-23 09:49:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 09:49:35,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133907290] [2020-12-23 09:49:35,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:35,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:49:35,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472936055] [2020-12-23 09:49:35,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:49:35,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:35,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:49:35,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:49:35,712 INFO L87 Difference]: Start difference. First operand 16109 states and 21796 transitions. Second operand 5 states. [2020-12-23 09:49:37,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:37,044 INFO L93 Difference]: Finished difference Result 28133 states and 38246 transitions. [2020-12-23 09:49:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:49:37,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-23 09:49:37,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:37,106 INFO L225 Difference]: With dead ends: 28133 [2020-12-23 09:49:37,106 INFO L226 Difference]: Without dead ends: 23339 [2020-12-23 09:49:37,118 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 [2020-12-23 09:49:37,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23339 states. [2020-12-23 09:49:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23339 to 20637. [2020-12-23 09:49:38,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20637 states. [2020-12-23 09:49:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20637 states to 20637 states and 27834 transitions. [2020-12-23 09:49:38,320 INFO L78 Accepts]: Start accepts. Automaton has 20637 states and 27834 transitions. Word has length 67 [2020-12-23 09:49:38,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:38,321 INFO L481 AbstractCegarLoop]: Abstraction has 20637 states and 27834 transitions. [2020-12-23 09:49:38,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:49:38,321 INFO L276 IsEmpty]: Start isEmpty. Operand 20637 states and 27834 transitions. [2020-12-23 09:49:38,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 09:49:38,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:38,327 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] [2020-12-23 09:49:38,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 09:49:38,328 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:38,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:38,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1380691940, now seen corresponding path program 1 times [2020-12-23 09:49:38,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:38,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200385788] [2020-12-23 09:49:38,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:49:38,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200385788] [2020-12-23 09:49:38,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:38,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:49:38,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537197113] [2020-12-23 09:49:38,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:49:38,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:38,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:49:38,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:49:38,419 INFO L87 Difference]: Start difference. First operand 20637 states and 27834 transitions. Second operand 6 states. [2020-12-23 09:49:40,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:40,389 INFO L93 Difference]: Finished difference Result 51647 states and 69366 transitions. [2020-12-23 09:49:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:49:40,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-23 09:49:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:40,448 INFO L225 Difference]: With dead ends: 51647 [2020-12-23 09:49:40,448 INFO L226 Difference]: Without dead ends: 31047 [2020-12-23 09:49:40,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:49:40,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31047 states. [2020-12-23 09:49:42,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31047 to 29450. [2020-12-23 09:49:42,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29450 states. [2020-12-23 09:49:42,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29450 states to 29450 states and 39166 transitions. [2020-12-23 09:49:42,273 INFO L78 Accepts]: Start accepts. Automaton has 29450 states and 39166 transitions. Word has length 67 [2020-12-23 09:49:42,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:42,274 INFO L481 AbstractCegarLoop]: Abstraction has 29450 states and 39166 transitions. [2020-12-23 09:49:42,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:49:42,274 INFO L276 IsEmpty]: Start isEmpty. Operand 29450 states and 39166 transitions. [2020-12-23 09:49:42,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 09:49:42,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:42,280 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] [2020-12-23 09:49:42,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 09:49:42,281 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:42,281 INFO L82 PathProgramCache]: Analyzing trace with hash -986325154, now seen corresponding path program 1 times [2020-12-23 09:49:42,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:42,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174274803] [2020-12-23 09:49:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:49:42,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174274803] [2020-12-23 09:49:42,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:42,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:49:42,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57717312] [2020-12-23 09:49:42,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:49:42,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:42,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:49:42,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:49:42,374 INFO L87 Difference]: Start difference. First operand 29450 states and 39166 transitions. Second operand 5 states. [2020-12-23 09:49:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:44,582 INFO L93 Difference]: Finished difference Result 49120 states and 65840 transitions. [2020-12-23 09:49:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:49:44,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-12-23 09:49:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:44,638 INFO L225 Difference]: With dead ends: 49120 [2020-12-23 09:49:44,638 INFO L226 Difference]: Without dead ends: 39623 [2020-12-23 09:49:44,659 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 [2020-12-23 09:49:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39623 states. [2020-12-23 09:49:46,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39623 to 36937. [2020-12-23 09:49:46,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36937 states. [2020-12-23 09:49:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36937 states to 36937 states and 49000 transitions. [2020-12-23 09:49:46,849 INFO L78 Accepts]: Start accepts. Automaton has 36937 states and 49000 transitions. Word has length 67 [2020-12-23 09:49:46,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:46,849 INFO L481 AbstractCegarLoop]: Abstraction has 36937 states and 49000 transitions. [2020-12-23 09:49:46,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:49:46,850 INFO L276 IsEmpty]: Start isEmpty. Operand 36937 states and 49000 transitions. [2020-12-23 09:49:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 09:49:46,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:46,856 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] [2020-12-23 09:49:46,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 09:49:46,857 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:46,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:46,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1025819592, now seen corresponding path program 1 times [2020-12-23 09:49:46,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:46,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027864440] [2020-12-23 09:49:46,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 09:49:46,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027864440] [2020-12-23 09:49:46,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:46,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:49:46,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73100319] [2020-12-23 09:49:46,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:49:46,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:46,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:49:46,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:49:46,952 INFO L87 Difference]: Start difference. First operand 36937 states and 49000 transitions. Second operand 6 states. [2020-12-23 09:49:50,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:50,113 INFO L93 Difference]: Finished difference Result 86961 states and 115818 transitions. [2020-12-23 09:49:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:49:50,113 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-12-23 09:49:50,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:50,183 INFO L225 Difference]: With dead ends: 86961 [2020-12-23 09:49:50,184 INFO L226 Difference]: Without dead ends: 50056 [2020-12-23 09:49:50,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:49:50,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50056 states. [2020-12-23 09:49:53,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50056 to 44904. [2020-12-23 09:49:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44904 states. [2020-12-23 09:49:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44904 states to 44904 states and 59231 transitions. [2020-12-23 09:49:53,225 INFO L78 Accepts]: Start accepts. Automaton has 44904 states and 59231 transitions. Word has length 68 [2020-12-23 09:49:53,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:53,225 INFO L481 AbstractCegarLoop]: Abstraction has 44904 states and 59231 transitions. [2020-12-23 09:49:53,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:49:53,226 INFO L276 IsEmpty]: Start isEmpty. Operand 44904 states and 59231 transitions. [2020-12-23 09:49:53,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 09:49:53,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:53,242 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] [2020-12-23 09:49:53,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 09:49:53,243 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:53,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:53,243 INFO L82 PathProgramCache]: Analyzing trace with hash 4680138, now seen corresponding path program 1 times [2020-12-23 09:49:53,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:53,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997700685] [2020-12-23 09:49:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:49:53,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997700685] [2020-12-23 09:49:53,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:53,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:49:53,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149372587] [2020-12-23 09:49:53,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:49:53,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:53,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:49:53,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:49:53,301 INFO L87 Difference]: Start difference. First operand 44904 states and 59231 transitions. Second operand 3 states. [2020-12-23 09:49:55,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:49:55,797 INFO L93 Difference]: Finished difference Result 65520 states and 86053 transitions. [2020-12-23 09:49:55,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:49:55,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2020-12-23 09:49:55,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:49:55,844 INFO L225 Difference]: With dead ends: 65520 [2020-12-23 09:49:55,844 INFO L226 Difference]: Without dead ends: 43704 [2020-12-23 09:49:55,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:49:55,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43704 states. [2020-12-23 09:49:58,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43704 to 38822. [2020-12-23 09:49:58,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38822 states. [2020-12-23 09:49:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38822 states to 38822 states and 50591 transitions. [2020-12-23 09:49:58,163 INFO L78 Accepts]: Start accepts. Automaton has 38822 states and 50591 transitions. Word has length 68 [2020-12-23 09:49:58,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:49:58,164 INFO L481 AbstractCegarLoop]: Abstraction has 38822 states and 50591 transitions. [2020-12-23 09:49:58,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:49:58,164 INFO L276 IsEmpty]: Start isEmpty. Operand 38822 states and 50591 transitions. [2020-12-23 09:49:58,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 09:49:58,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:49:58,171 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] [2020-12-23 09:49:58,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 09:49:58,171 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:49:58,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:49:58,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1858577065, now seen corresponding path program 1 times [2020-12-23 09:49:58,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:49:58,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508897859] [2020-12-23 09:49:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:49:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:49:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:49:58,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508897859] [2020-12-23 09:49:58,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:49:58,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:49:58,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562879985] [2020-12-23 09:49:58,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:49:58,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:49:58,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:49:58,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:49:58,264 INFO L87 Difference]: Start difference. First operand 38822 states and 50591 transitions. Second operand 5 states. [2020-12-23 09:50:00,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:00,621 INFO L93 Difference]: Finished difference Result 50571 states and 66511 transitions. [2020-12-23 09:50:00,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:50:00,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-12-23 09:50:00,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:00,679 INFO L225 Difference]: With dead ends: 50571 [2020-12-23 09:50:00,679 INFO L226 Difference]: Without dead ends: 45340 [2020-12-23 09:50:00,692 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 [2020-12-23 09:50:00,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45340 states. [2020-12-23 09:50:03,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45340 to 42500. [2020-12-23 09:50:03,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42500 states. [2020-12-23 09:50:03,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42500 states to 42500 states and 55395 transitions. [2020-12-23 09:50:03,241 INFO L78 Accepts]: Start accepts. Automaton has 42500 states and 55395 transitions. Word has length 69 [2020-12-23 09:50:03,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:03,241 INFO L481 AbstractCegarLoop]: Abstraction has 42500 states and 55395 transitions. [2020-12-23 09:50:03,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:50:03,241 INFO L276 IsEmpty]: Start isEmpty. Operand 42500 states and 55395 transitions. [2020-12-23 09:50:03,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 09:50:03,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:03,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:03,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 09:50:03,248 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:03,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:03,249 INFO L82 PathProgramCache]: Analyzing trace with hash 2123891639, now seen corresponding path program 1 times [2020-12-23 09:50:03,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:03,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731167277] [2020-12-23 09:50:03,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:03,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731167277] [2020-12-23 09:50:03,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:03,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:03,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983095361] [2020-12-23 09:50:03,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:03,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:03,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:03,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:03,311 INFO L87 Difference]: Start difference. First operand 42500 states and 55395 transitions. Second operand 3 states. [2020-12-23 09:50:05,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:05,897 INFO L93 Difference]: Finished difference Result 78382 states and 101599 transitions. [2020-12-23 09:50:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:05,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 70 [2020-12-23 09:50:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:05,948 INFO L225 Difference]: With dead ends: 78382 [2020-12-23 09:50:05,948 INFO L226 Difference]: Without dead ends: 43438 [2020-12-23 09:50:05,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43438 states. [2020-12-23 09:50:08,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43438 to 42564. [2020-12-23 09:50:08,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42564 states. [2020-12-23 09:50:08,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42564 states to 42564 states and 54903 transitions. [2020-12-23 09:50:08,682 INFO L78 Accepts]: Start accepts. Automaton has 42564 states and 54903 transitions. Word has length 70 [2020-12-23 09:50:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:08,683 INFO L481 AbstractCegarLoop]: Abstraction has 42564 states and 54903 transitions. [2020-12-23 09:50:08,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 42564 states and 54903 transitions. [2020-12-23 09:50:08,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 09:50:08,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:08,690 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] [2020-12-23 09:50:08,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 09:50:08,690 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:08,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1317965525, now seen corresponding path program 1 times [2020-12-23 09:50:08,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:08,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389836025] [2020-12-23 09:50:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:08,798 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:08,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389836025] [2020-12-23 09:50:08,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427982364] [2020-12-23 09:50:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:50:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:08,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:50:08,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:50:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:09,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:50:09,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 09:50:09,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872196140] [2020-12-23 09:50:09,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:50:09,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:09,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:50:09,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:50:09,295 INFO L87 Difference]: Start difference. First operand 42564 states and 54903 transitions. Second operand 11 states. [2020-12-23 09:50:14,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:14,195 INFO L93 Difference]: Finished difference Result 105976 states and 136997 transitions. [2020-12-23 09:50:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 09:50:14,196 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-12-23 09:50:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:14,284 INFO L225 Difference]: With dead ends: 105976 [2020-12-23 09:50:14,284 INFO L226 Difference]: Without dead ends: 73488 [2020-12-23 09:50:14,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:50:14,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73488 states. [2020-12-23 09:50:17,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73488 to 45430. [2020-12-23 09:50:17,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45430 states. [2020-12-23 09:50:17,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45430 states to 45430 states and 58666 transitions. [2020-12-23 09:50:17,472 INFO L78 Accepts]: Start accepts. Automaton has 45430 states and 58666 transitions. Word has length 71 [2020-12-23 09:50:17,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:17,472 INFO L481 AbstractCegarLoop]: Abstraction has 45430 states and 58666 transitions. [2020-12-23 09:50:17,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:50:17,472 INFO L276 IsEmpty]: Start isEmpty. Operand 45430 states and 58666 transitions. [2020-12-23 09:50:17,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 09:50:17,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:17,478 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] [2020-12-23 09:50:17,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:50:17,679 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:17,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:17,680 INFO L82 PathProgramCache]: Analyzing trace with hash 487943403, now seen corresponding path program 1 times [2020-12-23 09:50:17,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:17,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707419097] [2020-12-23 09:50:17,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:17,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707419097] [2020-12-23 09:50:17,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912281975] [2020-12-23 09:50:17,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:50:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:17,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:50:17,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:50:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:18,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:50:18,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 09:50:18,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878556232] [2020-12-23 09:50:18,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:50:18,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:18,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:50:18,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:50:18,248 INFO L87 Difference]: Start difference. First operand 45430 states and 58666 transitions. Second operand 11 states. [2020-12-23 09:50:18,507 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-12-23 09:50:22,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:22,667 INFO L93 Difference]: Finished difference Result 77901 states and 100549 transitions. [2020-12-23 09:50:22,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 09:50:22,667 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-12-23 09:50:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:22,745 INFO L225 Difference]: With dead ends: 77901 [2020-12-23 09:50:22,745 INFO L226 Difference]: Without dead ends: 59682 [2020-12-23 09:50:22,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:50:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59682 states. [2020-12-23 09:50:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59682 to 46042. [2020-12-23 09:50:26,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46042 states. [2020-12-23 09:50:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46042 states to 46042 states and 59179 transitions. [2020-12-23 09:50:26,195 INFO L78 Accepts]: Start accepts. Automaton has 46042 states and 59179 transitions. Word has length 72 [2020-12-23 09:50:26,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:26,195 INFO L481 AbstractCegarLoop]: Abstraction has 46042 states and 59179 transitions. [2020-12-23 09:50:26,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:50:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 46042 states and 59179 transitions. [2020-12-23 09:50:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 09:50:26,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:26,201 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] [2020-12-23 09:50:26,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:50:26,416 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:26,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:26,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2057872568, now seen corresponding path program 1 times [2020-12-23 09:50:26,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:26,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347335363] [2020-12-23 09:50:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:26,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347335363] [2020-12-23 09:50:26,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339868647] [2020-12-23 09:50:26,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:50:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:26,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:50:26,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:50:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:26,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:50:26,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-23 09:50:26,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758725420] [2020-12-23 09:50:26,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:50:26,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:26,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:50:26,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:50:26,998 INFO L87 Difference]: Start difference. First operand 46042 states and 59179 transitions. Second operand 11 states. [2020-12-23 09:50:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:33,801 INFO L93 Difference]: Finished difference Result 123151 states and 157505 transitions. [2020-12-23 09:50:33,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 09:50:33,802 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 73 [2020-12-23 09:50:33,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:33,919 INFO L225 Difference]: With dead ends: 123151 [2020-12-23 09:50:33,920 INFO L226 Difference]: Without dead ends: 90390 [2020-12-23 09:50:33,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:50:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90390 states. [2020-12-23 09:50:38,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90390 to 53594. [2020-12-23 09:50:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53594 states. [2020-12-23 09:50:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53594 states to 53594 states and 68889 transitions. [2020-12-23 09:50:38,305 INFO L78 Accepts]: Start accepts. Automaton has 53594 states and 68889 transitions. Word has length 73 [2020-12-23 09:50:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:38,305 INFO L481 AbstractCegarLoop]: Abstraction has 53594 states and 68889 transitions. [2020-12-23 09:50:38,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:50:38,305 INFO L276 IsEmpty]: Start isEmpty. Operand 53594 states and 68889 transitions. [2020-12-23 09:50:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 09:50:38,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:38,311 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] [2020-12-23 09:50:38,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:50:38,512 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:38,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:38,513 INFO L82 PathProgramCache]: Analyzing trace with hash 248844961, now seen corresponding path program 1 times [2020-12-23 09:50:38,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:38,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282589282] [2020-12-23 09:50:38,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:38,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282589282] [2020-12-23 09:50:38,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048192237] [2020-12-23 09:50:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:50:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:38,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 09:50:38,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:50:39,259 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:50:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:39,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:50:39,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 09:50:39,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101063284] [2020-12-23 09:50:39,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:50:39,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:39,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:50:39,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:50:39,698 INFO L87 Difference]: Start difference. First operand 53594 states and 68889 transitions. Second operand 17 states. [2020-12-23 09:50:41,062 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-12-23 09:50:54,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:54,899 INFO L93 Difference]: Finished difference Result 197713 states and 251229 transitions. [2020-12-23 09:50:54,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 09:50:54,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-12-23 09:50:54,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:55,117 INFO L225 Difference]: With dead ends: 197713 [2020-12-23 09:50:55,117 INFO L226 Difference]: Without dead ends: 149051 [2020-12-23 09:50:55,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=395, Invalid=1087, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 09:50:55,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149051 states. [2020-12-23 09:51:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149051 to 78054. [2020-12-23 09:51:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78054 states. [2020-12-23 09:51:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78054 states to 78054 states and 100209 transitions. [2020-12-23 09:51:02,094 INFO L78 Accepts]: Start accepts. Automaton has 78054 states and 100209 transitions. Word has length 73 [2020-12-23 09:51:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:02,095 INFO L481 AbstractCegarLoop]: Abstraction has 78054 states and 100209 transitions. [2020-12-23 09:51:02,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:51:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 78054 states and 100209 transitions. [2020-12-23 09:51:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 09:51:02,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:02,104 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] [2020-12-23 09:51:02,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 09:51:02,306 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:02,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:02,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1368215713, now seen corresponding path program 1 times [2020-12-23 09:51:02,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:02,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209676201] [2020-12-23 09:51:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:51:02,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209676201] [2020-12-23 09:51:02,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489438731] [2020-12-23 09:51:02,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:51:02,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:02,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 09:51:02,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:51:03,095 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:51:03,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:51:03,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:51:03,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 09:51:03,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143012958] [2020-12-23 09:51:03,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:51:03,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:03,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:51:03,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:51:03,366 INFO L87 Difference]: Start difference. First operand 78054 states and 100209 transitions. Second operand 17 states. [2020-12-23 09:51:23,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:23,604 INFO L93 Difference]: Finished difference Result 264170 states and 339214 transitions. [2020-12-23 09:51:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 09:51:23,605 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-12-23 09:51:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:24,115 INFO L225 Difference]: With dead ends: 264170 [2020-12-23 09:51:24,115 INFO L226 Difference]: Without dead ends: 227121 [2020-12-23 09:51:24,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 09:51:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227121 states. [2020-12-23 09:51:36,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227121 to 140701. [2020-12-23 09:51:36,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140701 states. [2020-12-23 09:51:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140701 states to 140701 states and 180698 transitions. [2020-12-23 09:51:36,794 INFO L78 Accepts]: Start accepts. Automaton has 140701 states and 180698 transitions. Word has length 73 [2020-12-23 09:51:36,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:36,795 INFO L481 AbstractCegarLoop]: Abstraction has 140701 states and 180698 transitions. [2020-12-23 09:51:36,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:51:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 140701 states and 180698 transitions. [2020-12-23 09:51:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 09:51:36,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:36,804 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] [2020-12-23 09:51:37,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:51:37,018 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:37,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:37,019 INFO L82 PathProgramCache]: Analyzing trace with hash -499793487, now seen corresponding path program 1 times [2020-12-23 09:51:37,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:37,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531292229] [2020-12-23 09:51:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:51:37,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531292229] [2020-12-23 09:51:37,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:51:37,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:51:37,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166929322] [2020-12-23 09:51:37,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:51:37,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:37,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:51:37,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:51:37,099 INFO L87 Difference]: Start difference. First operand 140701 states and 180698 transitions. Second operand 3 states. [2020-12-23 09:51:44,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:44,663 INFO L93 Difference]: Finished difference Result 225845 states and 290583 transitions. [2020-12-23 09:51:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:51:44,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 73 [2020-12-23 09:51:44,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:44,962 INFO L225 Difference]: With dead ends: 225845 [2020-12-23 09:51:44,962 INFO L226 Difference]: Without dead ends: 85216 [2020-12-23 09:51:45,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:51:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85216 states. [2020-12-23 09:51:52,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85216 to 84454. [2020-12-23 09:51:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84454 states. [2020-12-23 09:51:52,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84454 states to 84454 states and 107223 transitions. [2020-12-23 09:51:52,385 INFO L78 Accepts]: Start accepts. Automaton has 84454 states and 107223 transitions. Word has length 73 [2020-12-23 09:51:52,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:52,386 INFO L481 AbstractCegarLoop]: Abstraction has 84454 states and 107223 transitions. [2020-12-23 09:51:52,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:51:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 84454 states and 107223 transitions. [2020-12-23 09:51:52,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 09:51:52,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:52,401 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] [2020-12-23 09:51:52,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-23 09:51:52,401 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:52,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:52,402 INFO L82 PathProgramCache]: Analyzing trace with hash 524210211, now seen corresponding path program 1 times [2020-12-23 09:51:52,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:52,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777442283] [2020-12-23 09:51:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 09:51:52,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777442283] [2020-12-23 09:51:52,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:51:52,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:51:52,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782371792] [2020-12-23 09:51:52,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:51:52,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:52,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:51:52,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:51:52,495 INFO L87 Difference]: Start difference. First operand 84454 states and 107223 transitions. Second operand 6 states. [2020-12-23 09:51:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:59,950 INFO L93 Difference]: Finished difference Result 165038 states and 209708 transitions. [2020-12-23 09:51:59,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:51:59,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-12-23 09:51:59,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:52:00,056 INFO L225 Difference]: With dead ends: 165038 [2020-12-23 09:52:00,057 INFO L226 Difference]: Without dead ends: 80803 [2020-12-23 09:52:00,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:52:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80803 states. [2020-12-23 09:52:07,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80803 to 79592. [2020-12-23 09:52:07,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79592 states. [2020-12-23 09:52:07,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79592 states to 79592 states and 100276 transitions. [2020-12-23 09:52:07,336 INFO L78 Accepts]: Start accepts. Automaton has 79592 states and 100276 transitions. Word has length 73 [2020-12-23 09:52:07,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:52:07,336 INFO L481 AbstractCegarLoop]: Abstraction has 79592 states and 100276 transitions. [2020-12-23 09:52:07,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:52:07,336 INFO L276 IsEmpty]: Start isEmpty. Operand 79592 states and 100276 transitions. [2020-12-23 09:52:07,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 09:52:07,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:52:07,341 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] [2020-12-23 09:52:07,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-23 09:52:07,341 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:52:07,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:52:07,341 INFO L82 PathProgramCache]: Analyzing trace with hash -254072136, now seen corresponding path program 1 times [2020-12-23 09:52:07,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:52:07,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460232928] [2020-12-23 09:52:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:52:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:52:07,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:52:07,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460232928] [2020-12-23 09:52:07,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:52:07,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:52:07,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865242799] [2020-12-23 09:52:07,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:52:07,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:52:07,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:52:07,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:52:07,391 INFO L87 Difference]: Start difference. First operand 79592 states and 100276 transitions. Second operand 3 states. [2020-12-23 09:52:13,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:52:13,411 INFO L93 Difference]: Finished difference Result 98601 states and 124178 transitions. [2020-12-23 09:52:13,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:52:13,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-23 09:52:13,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:52:13,487 INFO L225 Difference]: With dead ends: 98601 [2020-12-23 09:52:13,487 INFO L226 Difference]: Without dead ends: 71179 [2020-12-23 09:52:13,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:52:13,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71179 states. [2020-12-23 09:52:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71179 to 71177. [2020-12-23 09:52:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71177 states. [2020-12-23 09:52:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71177 states to 71177 states and 88326 transitions. [2020-12-23 09:52:20,089 INFO L78 Accepts]: Start accepts. Automaton has 71177 states and 88326 transitions. Word has length 74 [2020-12-23 09:52:20,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:52:20,089 INFO L481 AbstractCegarLoop]: Abstraction has 71177 states and 88326 transitions. [2020-12-23 09:52:20,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:52:20,089 INFO L276 IsEmpty]: Start isEmpty. Operand 71177 states and 88326 transitions. [2020-12-23 09:52:20,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 09:52:20,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:52:20,094 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] [2020-12-23 09:52:20,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-23 09:52:20,094 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:52:20,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:52:20,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1183068259, now seen corresponding path program 1 times [2020-12-23 09:52:20,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:52:20,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819136927] [2020-12-23 09:52:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:52:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:52:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 09:52:20,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819136927] [2020-12-23 09:52:20,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:52:20,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:52:20,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055131489] [2020-12-23 09:52:20,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:52:20,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:52:20,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:52:20,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:52:20,145 INFO L87 Difference]: Start difference. First operand 71177 states and 88326 transitions. Second operand 3 states.