/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:47:50,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:47:50,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:47:50,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:47:50,305 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:47:50,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:47:50,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:47:50,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:47:50,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:47:50,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:47:50,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:47:50,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:47:50,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:47:50,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:47:50,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:47:50,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:47:50,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:47:50,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:47:50,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:47:50,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:47:50,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:47:50,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:47:50,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:47:50,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:47:50,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 19:47:50,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 19:47:50,347 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 19:47:50,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 19:47:50,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 19:47:50,350 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 19:47:50,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:47:50,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:47:50,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:47:50,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:47:50,354 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:47:50,354 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:47:50,355 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:47:50,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:47:50,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:47:50,357 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:47:50,358 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:47:50,359 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 19:47:50,385 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:47:50,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:47:50,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:47:50,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:47:50,388 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:47:50,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:47:50,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:47:50,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:47:50,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:47:50,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:47:50,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:47:50,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:47:50,390 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:47:50,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:47:50,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:47:50,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:47:50,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:47:50,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:47:50,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:47:50,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:47:50,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:47:50,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:47:50,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:47:50,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:47:50,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:47:50,394 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:47:50,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:47:50,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:47:50,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:47:50,789 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:47:50,790 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:47:50,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.BOUNDED-6.pals.c [2021-01-06 19:47:50,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e97ecbe55/acb53dd16ad84ec2be715364eb9a8a81/FLAGa26dcd209 [2021-01-06 19:47:51,500 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:47:51,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.BOUNDED-6.pals.c [2021-01-06 19:47:51,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e97ecbe55/acb53dd16ad84ec2be715364eb9a8a81/FLAGa26dcd209 [2021-01-06 19:47:51,806 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e97ecbe55/acb53dd16ad84ec2be715364eb9a8a81 [2021-01-06 19:47:51,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:47:51,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:47:51,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:47:51,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:47:51,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:47:51,822 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:47:51" (1/1) ... [2021-01-06 19:47:51,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@174d8790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:51, skipping insertion in model container [2021-01-06 19:47:51,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:47:51" (1/1) ... [2021-01-06 19:47:51,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:47:51,888 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] [2021-01-06 19:47:52,110 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.BOUNDED-6.pals.c[5947,5960] [2021-01-06 19:47:52,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:47:52,124 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] [2021-01-06 19:47:52,171 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.ufo.BOUNDED-6.pals.c[5947,5960] [2021-01-06 19:47:52,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:47:52,193 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:47:52,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:52 WrapperNode [2021-01-06 19:47:52,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:47:52,195 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:47:52,195 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:47:52,195 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:47:52,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:52" (1/1) ... [2021-01-06 19:47:52,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:52" (1/1) ... [2021-01-06 19:47:52,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:47:52,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:47:52,246 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:47:52,246 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:47:52,256 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:52" (1/1) ... [2021-01-06 19:47:52,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:52" (1/1) ... [2021-01-06 19:47:52,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:52" (1/1) ... [2021-01-06 19:47:52,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:52" (1/1) ... [2021-01-06 19:47:52,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:52" (1/1) ... [2021-01-06 19:47:52,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:52" (1/1) ... [2021-01-06 19:47:52,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:52" (1/1) ... [2021-01-06 19:47:52,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:47:52,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:47:52,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:47:52,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:47:52,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:47:52,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:47:52,410 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:47:52,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:47:52,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:47:53,138 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:47:53,138 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-01-06 19:47:53,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:47:53 BoogieIcfgContainer [2021-01-06 19:47:53,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:47:53,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:47:53,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:47:53,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:47:53,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:47:51" (1/3) ... [2021-01-06 19:47:53,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c34bc78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:47:53, skipping insertion in model container [2021-01-06 19:47:53,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:52" (2/3) ... [2021-01-06 19:47:53,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c34bc78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:47:53, skipping insertion in model container [2021-01-06 19:47:53,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:47:53" (3/3) ... [2021-01-06 19:47:53,149 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals.c [2021-01-06 19:47:53,156 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:47:53,161 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:47:53,180 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:47:53,208 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:47:53,208 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:47:53,209 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:47:53,209 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:47:53,209 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:47:53,209 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:47:53,209 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:47:53,209 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:47:53,225 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2021-01-06 19:47:53,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 19:47:53,233 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:53,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:53,234 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:53,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:53,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1133243219, now seen corresponding path program 1 times [2021-01-06 19:47:53,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:53,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970884443] [2021-01-06 19:47:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:53,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970884443] [2021-01-06 19:47:53,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:53,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 19:47:53,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059459503] [2021-01-06 19:47:53,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 19:47:53,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:53,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 19:47:53,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 19:47:53,536 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2021-01-06 19:47:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:53,563 INFO L93 Difference]: Finished difference Result 103 states and 164 transitions. [2021-01-06 19:47:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 19:47:53,565 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2021-01-06 19:47:53,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:53,577 INFO L225 Difference]: With dead ends: 103 [2021-01-06 19:47:53,577 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 19:47:53,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 19:47:53,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 19:47:53,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-01-06 19:47:53,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 19:47:53,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 94 transitions. [2021-01-06 19:47:53,627 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 94 transitions. Word has length 25 [2021-01-06 19:47:53,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:53,627 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 94 transitions. [2021-01-06 19:47:53,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 19:47:53,628 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 94 transitions. [2021-01-06 19:47:53,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 19:47:53,629 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:53,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:53,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:47:53,630 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:53,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:53,631 INFO L82 PathProgramCache]: Analyzing trace with hash 315594769, now seen corresponding path program 1 times [2021-01-06 19:47:53,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:53,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098011378] [2021-01-06 19:47:53,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:53,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098011378] [2021-01-06 19:47:53,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:53,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:47:53,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487415798] [2021-01-06 19:47:53,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:47:53,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:53,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:47:53,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:53,757 INFO L87 Difference]: Start difference. First operand 58 states and 94 transitions. Second operand 5 states. [2021-01-06 19:47:53,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:53,895 INFO L93 Difference]: Finished difference Result 134 states and 210 transitions. [2021-01-06 19:47:53,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:47:53,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2021-01-06 19:47:53,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:53,898 INFO L225 Difference]: With dead ends: 134 [2021-01-06 19:47:53,899 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 19:47:53,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:47:53,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 19:47:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2021-01-06 19:47:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 19:47:53,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2021-01-06 19:47:53,912 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 25 [2021-01-06 19:47:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:53,913 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2021-01-06 19:47:53,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:47:53,913 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2021-01-06 19:47:53,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:47:53,917 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:53,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:53,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 19:47:53,918 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:53,919 INFO L82 PathProgramCache]: Analyzing trace with hash -278543826, now seen corresponding path program 1 times [2021-01-06 19:47:53,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:53,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677807675] [2021-01-06 19:47:53,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:54,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677807675] [2021-01-06 19:47:54,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:54,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:47:54,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29049469] [2021-01-06 19:47:54,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:47:54,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:54,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:47:54,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:54,049 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand 3 states. [2021-01-06 19:47:54,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:54,083 INFO L93 Difference]: Finished difference Result 124 states and 180 transitions. [2021-01-06 19:47:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:47:54,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2021-01-06 19:47:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:54,086 INFO L225 Difference]: With dead ends: 124 [2021-01-06 19:47:54,087 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 19:47:54,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:54,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 19:47:54,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2021-01-06 19:47:54,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2021-01-06 19:47:54,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 122 transitions. [2021-01-06 19:47:54,106 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 122 transitions. Word has length 40 [2021-01-06 19:47:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:54,107 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 122 transitions. [2021-01-06 19:47:54,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:47:54,107 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 122 transitions. [2021-01-06 19:47:54,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:47:54,109 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:54,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:54,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 19:47:54,110 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:54,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:54,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1401070434, now seen corresponding path program 1 times [2021-01-06 19:47:54,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:54,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420723892] [2021-01-06 19:47:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:54,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420723892] [2021-01-06 19:47:54,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:54,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:47:54,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411218902] [2021-01-06 19:47:54,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:47:54,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:54,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:47:54,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:54,246 INFO L87 Difference]: Start difference. First operand 86 states and 122 transitions. Second operand 3 states. [2021-01-06 19:47:54,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:54,282 INFO L93 Difference]: Finished difference Result 202 states and 302 transitions. [2021-01-06 19:47:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:47:54,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2021-01-06 19:47:54,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:54,285 INFO L225 Difference]: With dead ends: 202 [2021-01-06 19:47:54,286 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 19:47:54,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:54,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 19:47:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2021-01-06 19:47:54,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 19:47:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 199 transitions. [2021-01-06 19:47:54,320 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 199 transitions. Word has length 40 [2021-01-06 19:47:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:54,320 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 199 transitions. [2021-01-06 19:47:54,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:47:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 199 transitions. [2021-01-06 19:47:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:47:54,325 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:54,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:54,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 19:47:54,328 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:54,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:54,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1738863576, now seen corresponding path program 1 times [2021-01-06 19:47:54,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:54,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614732033] [2021-01-06 19:47:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:54,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614732033] [2021-01-06 19:47:54,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:54,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:47:54,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852187578] [2021-01-06 19:47:54,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:47:54,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:54,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:47:54,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:54,442 INFO L87 Difference]: Start difference. First operand 136 states and 199 transitions. Second operand 3 states. [2021-01-06 19:47:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:54,504 INFO L93 Difference]: Finished difference Result 340 states and 513 transitions. [2021-01-06 19:47:54,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:47:54,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2021-01-06 19:47:54,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:54,508 INFO L225 Difference]: With dead ends: 340 [2021-01-06 19:47:54,508 INFO L226 Difference]: Without dead ends: 226 [2021-01-06 19:47:54,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:54,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-01-06 19:47:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2021-01-06 19:47:54,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-01-06 19:47:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 331 transitions. [2021-01-06 19:47:54,537 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 331 transitions. Word has length 40 [2021-01-06 19:47:54,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:54,538 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 331 transitions. [2021-01-06 19:47:54,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:47:54,538 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 331 transitions. [2021-01-06 19:47:54,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:47:54,539 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:54,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:54,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 19:47:54,540 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1338118322, now seen corresponding path program 1 times [2021-01-06 19:47:54,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:54,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068224855] [2021-01-06 19:47:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:54,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068224855] [2021-01-06 19:47:54,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:54,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:47:54,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91148258] [2021-01-06 19:47:54,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:47:54,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:54,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:47:54,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:47:54,694 INFO L87 Difference]: Start difference. First operand 224 states and 331 transitions. Second operand 6 states. [2021-01-06 19:47:54,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:54,919 INFO L93 Difference]: Finished difference Result 426 states and 640 transitions. [2021-01-06 19:47:54,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:47:54,920 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2021-01-06 19:47:54,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:54,922 INFO L225 Difference]: With dead ends: 426 [2021-01-06 19:47:54,923 INFO L226 Difference]: Without dead ends: 224 [2021-01-06 19:47:54,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:47:54,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-01-06 19:47:54,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-01-06 19:47:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2021-01-06 19:47:54,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 327 transitions. [2021-01-06 19:47:54,945 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 327 transitions. Word has length 40 [2021-01-06 19:47:54,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:54,946 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 327 transitions. [2021-01-06 19:47:54,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:47:54,946 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 327 transitions. [2021-01-06 19:47:54,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:47:54,947 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:54,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:54,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 19:47:54,948 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:54,949 INFO L82 PathProgramCache]: Analyzing trace with hash -317049968, now seen corresponding path program 1 times [2021-01-06 19:47:54,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:54,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580511990] [2021-01-06 19:47:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:55,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:55,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580511990] [2021-01-06 19:47:55,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:55,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:47:55,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965728339] [2021-01-06 19:47:55,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:47:55,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:55,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:47:55,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:55,039 INFO L87 Difference]: Start difference. First operand 224 states and 327 transitions. Second operand 5 states. [2021-01-06 19:47:55,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:55,241 INFO L93 Difference]: Finished difference Result 1234 states and 1852 transitions. [2021-01-06 19:47:55,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:47:55,242 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2021-01-06 19:47:55,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:55,250 INFO L225 Difference]: With dead ends: 1234 [2021-01-06 19:47:55,250 INFO L226 Difference]: Without dead ends: 1032 [2021-01-06 19:47:55,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:47:55,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-01-06 19:47:55,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 424. [2021-01-06 19:47:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2021-01-06 19:47:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 615 transitions. [2021-01-06 19:47:55,288 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 615 transitions. Word has length 40 [2021-01-06 19:47:55,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:55,289 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 615 transitions. [2021-01-06 19:47:55,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:47:55,289 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 615 transitions. [2021-01-06 19:47:55,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 19:47:55,290 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:55,290 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:55,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 19:47:55,291 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:55,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:55,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1091548472, now seen corresponding path program 1 times [2021-01-06 19:47:55,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:55,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164196112] [2021-01-06 19:47:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:55,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:55,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164196112] [2021-01-06 19:47:55,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:55,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:47:55,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973459437] [2021-01-06 19:47:55,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:47:55,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:55,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:47:55,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:55,495 INFO L87 Difference]: Start difference. First operand 424 states and 615 transitions. Second operand 5 states. [2021-01-06 19:47:55,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:55,606 INFO L93 Difference]: Finished difference Result 1030 states and 1514 transitions. [2021-01-06 19:47:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:47:55,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2021-01-06 19:47:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:55,611 INFO L225 Difference]: With dead ends: 1030 [2021-01-06 19:47:55,611 INFO L226 Difference]: Without dead ends: 628 [2021-01-06 19:47:55,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:55,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-01-06 19:47:55,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 424. [2021-01-06 19:47:55,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2021-01-06 19:47:55,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 607 transitions. [2021-01-06 19:47:55,644 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 607 transitions. Word has length 42 [2021-01-06 19:47:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:55,645 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 607 transitions. [2021-01-06 19:47:55,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:47:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 607 transitions. [2021-01-06 19:47:55,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 19:47:55,646 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:55,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:55,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 19:47:55,647 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:55,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:55,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1158041984, now seen corresponding path program 1 times [2021-01-06 19:47:55,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:55,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374467073] [2021-01-06 19:47:55,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:55,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374467073] [2021-01-06 19:47:55,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:55,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:47:55,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799365555] [2021-01-06 19:47:55,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:47:55,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:55,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:47:55,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:55,693 INFO L87 Difference]: Start difference. First operand 424 states and 607 transitions. Second operand 3 states. [2021-01-06 19:47:55,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:55,758 INFO L93 Difference]: Finished difference Result 1010 states and 1451 transitions. [2021-01-06 19:47:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:47:55,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2021-01-06 19:47:55,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:55,762 INFO L225 Difference]: With dead ends: 1010 [2021-01-06 19:47:55,762 INFO L226 Difference]: Without dead ends: 608 [2021-01-06 19:47:55,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:55,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-01-06 19:47:55,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 606. [2021-01-06 19:47:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2021-01-06 19:47:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 853 transitions. [2021-01-06 19:47:55,807 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 853 transitions. Word has length 42 [2021-01-06 19:47:55,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:55,807 INFO L481 AbstractCegarLoop]: Abstraction has 606 states and 853 transitions. [2021-01-06 19:47:55,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:47:55,807 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 853 transitions. [2021-01-06 19:47:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 19:47:55,808 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:55,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:55,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-06 19:47:55,808 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:55,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:55,809 INFO L82 PathProgramCache]: Analyzing trace with hash 107012533, now seen corresponding path program 1 times [2021-01-06 19:47:55,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:55,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959333449] [2021-01-06 19:47:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:55,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959333449] [2021-01-06 19:47:55,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:55,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:47:55,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340561165] [2021-01-06 19:47:55,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:47:55,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:55,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:47:55,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:55,895 INFO L87 Difference]: Start difference. First operand 606 states and 853 transitions. Second operand 5 states. [2021-01-06 19:47:56,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:56,081 INFO L93 Difference]: Finished difference Result 1129 states and 1572 transitions. [2021-01-06 19:47:56,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 19:47:56,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2021-01-06 19:47:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:56,088 INFO L225 Difference]: With dead ends: 1129 [2021-01-06 19:47:56,088 INFO L226 Difference]: Without dead ends: 1127 [2021-01-06 19:47:56,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:47:56,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-01-06 19:47:56,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 654. [2021-01-06 19:47:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2021-01-06 19:47:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 897 transitions. [2021-01-06 19:47:56,147 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 897 transitions. Word has length 43 [2021-01-06 19:47:56,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:56,148 INFO L481 AbstractCegarLoop]: Abstraction has 654 states and 897 transitions. [2021-01-06 19:47:56,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:47:56,148 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 897 transitions. [2021-01-06 19:47:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 19:47:56,150 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:56,150 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] [2021-01-06 19:47:56,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 19:47:56,150 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:56,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:56,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1027002802, now seen corresponding path program 1 times [2021-01-06 19:47:56,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:56,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338468745] [2021-01-06 19:47:56,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 19:47:56,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338468745] [2021-01-06 19:47:56,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:56,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:47:56,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712985657] [2021-01-06 19:47:56,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:47:56,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:56,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:47:56,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:56,237 INFO L87 Difference]: Start difference. First operand 654 states and 897 transitions. Second operand 5 states. [2021-01-06 19:47:56,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:56,573 INFO L93 Difference]: Finished difference Result 2682 states and 3697 transitions. [2021-01-06 19:47:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:47:56,579 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2021-01-06 19:47:56,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:56,592 INFO L225 Difference]: With dead ends: 2682 [2021-01-06 19:47:56,594 INFO L226 Difference]: Without dead ends: 2052 [2021-01-06 19:47:56,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:47:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-01-06 19:47:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1282. [2021-01-06 19:47:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2021-01-06 19:47:56,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1757 transitions. [2021-01-06 19:47:56,742 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1757 transitions. Word has length 63 [2021-01-06 19:47:56,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:56,742 INFO L481 AbstractCegarLoop]: Abstraction has 1282 states and 1757 transitions. [2021-01-06 19:47:56,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:47:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1757 transitions. [2021-01-06 19:47:56,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 19:47:56,744 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:56,744 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] [2021-01-06 19:47:56,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 19:47:56,744 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:56,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1499181678, now seen corresponding path program 1 times [2021-01-06 19:47:56,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:56,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749509256] [2021-01-06 19:47:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 19:47:56,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749509256] [2021-01-06 19:47:56,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:56,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:47:56,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289438612] [2021-01-06 19:47:56,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:47:56,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:56,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:47:56,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:56,887 INFO L87 Difference]: Start difference. First operand 1282 states and 1757 transitions. Second operand 5 states. [2021-01-06 19:47:57,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:57,188 INFO L93 Difference]: Finished difference Result 3310 states and 4557 transitions. [2021-01-06 19:47:57,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:47:57,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2021-01-06 19:47:57,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:57,203 INFO L225 Difference]: With dead ends: 3310 [2021-01-06 19:47:57,204 INFO L226 Difference]: Without dead ends: 2680 [2021-01-06 19:47:57,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:57,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-01-06 19:47:57,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2226. [2021-01-06 19:47:57,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2226 states. [2021-01-06 19:47:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3037 transitions. [2021-01-06 19:47:57,411 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3037 transitions. Word has length 63 [2021-01-06 19:47:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:57,411 INFO L481 AbstractCegarLoop]: Abstraction has 2226 states and 3037 transitions. [2021-01-06 19:47:57,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:47:57,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3037 transitions. [2021-01-06 19:47:57,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 19:47:57,413 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:57,413 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] [2021-01-06 19:47:57,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-01-06 19:47:57,413 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:57,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:57,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1664145778, now seen corresponding path program 1 times [2021-01-06 19:47:57,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:57,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755581134] [2021-01-06 19:47:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:47:57,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755581134] [2021-01-06 19:47:57,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:57,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:47:57,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922312888] [2021-01-06 19:47:57,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:47:57,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:57,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:47:57,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:57,529 INFO L87 Difference]: Start difference. First operand 2226 states and 3037 transitions. Second operand 5 states. [2021-01-06 19:47:57,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:57,841 INFO L93 Difference]: Finished difference Result 3758 states and 5177 transitions. [2021-01-06 19:47:57,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:47:57,842 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2021-01-06 19:47:57,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:57,858 INFO L225 Difference]: With dead ends: 3758 [2021-01-06 19:47:57,859 INFO L226 Difference]: Without dead ends: 3308 [2021-01-06 19:47:57,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:57,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3308 states. [2021-01-06 19:47:58,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3308 to 2674. [2021-01-06 19:47:58,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2674 states. [2021-01-06 19:47:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 3661 transitions. [2021-01-06 19:47:58,113 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 3661 transitions. Word has length 63 [2021-01-06 19:47:58,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:58,113 INFO L481 AbstractCegarLoop]: Abstraction has 2674 states and 3661 transitions. [2021-01-06 19:47:58,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:47:58,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 3661 transitions. [2021-01-06 19:47:58,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:47:58,115 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:58,115 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] [2021-01-06 19:47:58,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-01-06 19:47:58,116 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:58,116 INFO L82 PathProgramCache]: Analyzing trace with hash -229876224, now seen corresponding path program 1 times [2021-01-06 19:47:58,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:58,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957273847] [2021-01-06 19:47:58,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:47:58,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957273847] [2021-01-06 19:47:58,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746214295] [2021-01-06 19:47:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:47:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:58,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 19:47:58,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:47:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:47:58,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:47:58,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2021-01-06 19:47:58,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446674768] [2021-01-06 19:47:58,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 19:47:58,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:58,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 19:47:58,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:47:58,684 INFO L87 Difference]: Start difference. First operand 2674 states and 3661 transitions. Second operand 7 states. [2021-01-06 19:47:59,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:59,271 INFO L93 Difference]: Finished difference Result 6353 states and 8781 transitions. [2021-01-06 19:47:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:47:59,272 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2021-01-06 19:47:59,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:59,294 INFO L225 Difference]: With dead ends: 6353 [2021-01-06 19:47:59,294 INFO L226 Difference]: Without dead ends: 4335 [2021-01-06 19:47:59,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:47:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-01-06 19:47:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 4286. [2021-01-06 19:47:59,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4286 states. [2021-01-06 19:47:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4286 states to 4286 states and 5805 transitions. [2021-01-06 19:47:59,728 INFO L78 Accepts]: Start accepts. Automaton has 4286 states and 5805 transitions. Word has length 64 [2021-01-06 19:47:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:59,728 INFO L481 AbstractCegarLoop]: Abstraction has 4286 states and 5805 transitions. [2021-01-06 19:47:59,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 19:47:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4286 states and 5805 transitions. [2021-01-06 19:47:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:47:59,730 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:59,730 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] [2021-01-06 19:47:59,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 19:47:59,944 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:59,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:59,945 INFO L82 PathProgramCache]: Analyzing trace with hash -456421882, now seen corresponding path program 1 times [2021-01-06 19:47:59,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:59,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513160] [2021-01-06 19:47:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:00,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513160] [2021-01-06 19:48:00,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560990235] [2021-01-06 19:48:00,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:48:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:00,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 19:48:00,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:48:00,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 19:48:00,856 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:00,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:48:00,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 19:48:00,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144998954] [2021-01-06 19:48:00,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:48:00,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:00,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:48:00,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:48:00,858 INFO L87 Difference]: Start difference. First operand 4286 states and 5805 transitions. Second operand 17 states. [2021-01-06 19:48:03,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:03,334 INFO L93 Difference]: Finished difference Result 16283 states and 21903 transitions. [2021-01-06 19:48:03,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 19:48:03,335 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2021-01-06 19:48:03,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:03,414 INFO L225 Difference]: With dead ends: 16283 [2021-01-06 19:48:03,414 INFO L226 Difference]: Without dead ends: 12021 [2021-01-06 19:48:03,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 19:48:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12021 states. [2021-01-06 19:48:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12021 to 7790. [2021-01-06 19:48:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7790 states. [2021-01-06 19:48:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7790 states to 7790 states and 10457 transitions. [2021-01-06 19:48:04,182 INFO L78 Accepts]: Start accepts. Automaton has 7790 states and 10457 transitions. Word has length 65 [2021-01-06 19:48:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:04,182 INFO L481 AbstractCegarLoop]: Abstraction has 7790 states and 10457 transitions. [2021-01-06 19:48:04,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:48:04,183 INFO L276 IsEmpty]: Start isEmpty. Operand 7790 states and 10457 transitions. [2021-01-06 19:48:04,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:48:04,184 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:04,184 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] [2021-01-06 19:48:04,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 19:48:04,399 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:04,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:04,400 INFO L82 PathProgramCache]: Analyzing trace with hash 550341158, now seen corresponding path program 1 times [2021-01-06 19:48:04,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:04,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154440977] [2021-01-06 19:48:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:04,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154440977] [2021-01-06 19:48:04,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91216474] [2021-01-06 19:48:04,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:48:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:04,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 19:48:04,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:48:04,899 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 19:48:05,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:05,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:48:05,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 19:48:05,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526699277] [2021-01-06 19:48:05,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:48:05,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:05,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:48:05,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:48:05,273 INFO L87 Difference]: Start difference. First operand 7790 states and 10457 transitions. Second operand 17 states. [2021-01-06 19:48:06,024 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-01-06 19:48:08,525 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-01-06 19:48:08,932 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-01-06 19:48:09,327 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-01-06 19:48:09,750 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2021-01-06 19:48:10,582 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2021-01-06 19:48:14,451 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-01-06 19:48:17,182 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-01-06 19:48:23,047 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2021-01-06 19:48:23,484 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-01-06 19:48:24,299 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-01-06 19:48:29,497 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-01-06 19:48:29,975 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2021-01-06 19:48:30,762 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-01-06 19:48:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:33,467 INFO L93 Difference]: Finished difference Result 157983 states and 209246 transitions. [2021-01-06 19:48:33,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2021-01-06 19:48:33,467 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2021-01-06 19:48:33,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:33,826 INFO L225 Difference]: With dead ends: 157983 [2021-01-06 19:48:33,826 INFO L226 Difference]: Without dead ends: 150217 [2021-01-06 19:48:33,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20542 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=5056, Invalid=42686, Unknown=0, NotChecked=0, Total=47742 [2021-01-06 19:48:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150217 states. [2021-01-06 19:48:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150217 to 41241. [2021-01-06 19:48:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41241 states. [2021-01-06 19:48:39,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41241 states to 41241 states and 55254 transitions. [2021-01-06 19:48:39,290 INFO L78 Accepts]: Start accepts. Automaton has 41241 states and 55254 transitions. Word has length 65 [2021-01-06 19:48:39,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:39,291 INFO L481 AbstractCegarLoop]: Abstraction has 41241 states and 55254 transitions. [2021-01-06 19:48:39,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:48:39,291 INFO L276 IsEmpty]: Start isEmpty. Operand 41241 states and 55254 transitions. [2021-01-06 19:48:39,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:48:39,293 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:39,294 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] [2021-01-06 19:48:39,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 19:48:39,505 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:39,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:39,507 INFO L82 PathProgramCache]: Analyzing trace with hash 625513838, now seen corresponding path program 1 times [2021-01-06 19:48:39,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:39,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041185430] [2021-01-06 19:48:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:39,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041185430] [2021-01-06 19:48:39,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:39,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:48:39,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202153990] [2021-01-06 19:48:39,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:48:39,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:39,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:48:39,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:39,571 INFO L87 Difference]: Start difference. First operand 41241 states and 55254 transitions. Second operand 3 states. [2021-01-06 19:48:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:43,018 INFO L93 Difference]: Finished difference Result 82460 states and 110485 transitions. [2021-01-06 19:48:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:48:43,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2021-01-06 19:48:43,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:43,095 INFO L225 Difference]: With dead ends: 82460 [2021-01-06 19:48:43,095 INFO L226 Difference]: Without dead ends: 41243 [2021-01-06 19:48:43,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:43,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41243 states. [2021-01-06 19:48:46,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41243 to 40353. [2021-01-06 19:48:46,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40353 states. [2021-01-06 19:48:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40353 states to 40353 states and 53034 transitions. [2021-01-06 19:48:46,930 INFO L78 Accepts]: Start accepts. Automaton has 40353 states and 53034 transitions. Word has length 65 [2021-01-06 19:48:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:46,930 INFO L481 AbstractCegarLoop]: Abstraction has 40353 states and 53034 transitions. [2021-01-06 19:48:46,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:48:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 40353 states and 53034 transitions. [2021-01-06 19:48:46,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:48:46,933 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:46,933 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] [2021-01-06 19:48:46,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-01-06 19:48:46,933 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:46,934 INFO L82 PathProgramCache]: Analyzing trace with hash -621993778, now seen corresponding path program 1 times [2021-01-06 19:48:46,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:46,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433725213] [2021-01-06 19:48:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:46,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433725213] [2021-01-06 19:48:46,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:46,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:48:46,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510062694] [2021-01-06 19:48:46,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:48:46,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:46,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:48:46,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:46,999 INFO L87 Difference]: Start difference. First operand 40353 states and 53034 transitions. Second operand 3 states. [2021-01-06 19:48:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:48,977 INFO L93 Difference]: Finished difference Result 63110 states and 82863 transitions. [2021-01-06 19:48:48,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:48:48,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2021-01-06 19:48:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:49,011 INFO L225 Difference]: With dead ends: 63110 [2021-01-06 19:48:49,012 INFO L226 Difference]: Without dead ends: 22781 [2021-01-06 19:48:49,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22781 states. [2021-01-06 19:48:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22781 to 22779. [2021-01-06 19:48:50,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22779 states. [2021-01-06 19:48:51,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22779 states to 22779 states and 29246 transitions. [2021-01-06 19:48:51,147 INFO L78 Accepts]: Start accepts. Automaton has 22779 states and 29246 transitions. Word has length 65 [2021-01-06 19:48:51,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:51,148 INFO L481 AbstractCegarLoop]: Abstraction has 22779 states and 29246 transitions. [2021-01-06 19:48:51,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:48:51,148 INFO L276 IsEmpty]: Start isEmpty. Operand 22779 states and 29246 transitions. [2021-01-06 19:48:51,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:48:51,149 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:51,149 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] [2021-01-06 19:48:51,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-01-06 19:48:51,150 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:51,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:51,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1642879954, now seen corresponding path program 1 times [2021-01-06 19:48:51,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:51,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166047459] [2021-01-06 19:48:51,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:51,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:51,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166047459] [2021-01-06 19:48:51,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:51,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:48:51,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744461180] [2021-01-06 19:48:51,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:48:51,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:51,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:48:51,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:51,205 INFO L87 Difference]: Start difference. First operand 22779 states and 29246 transitions. Second operand 3 states. [2021-01-06 19:48:52,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:52,413 INFO L93 Difference]: Finished difference Result 31656 states and 40694 transitions. [2021-01-06 19:48:52,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:48:52,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2021-01-06 19:48:52,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:52,428 INFO L225 Difference]: With dead ends: 31656 [2021-01-06 19:48:52,428 INFO L226 Difference]: Without dead ends: 8901 [2021-01-06 19:48:52,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:52,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8901 states. [2021-01-06 19:48:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8901 to 8251. [2021-01-06 19:48:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8251 states. [2021-01-06 19:48:53,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8251 states to 8251 states and 10504 transitions. [2021-01-06 19:48:53,267 INFO L78 Accepts]: Start accepts. Automaton has 8251 states and 10504 transitions. Word has length 65 [2021-01-06 19:48:53,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:53,268 INFO L481 AbstractCegarLoop]: Abstraction has 8251 states and 10504 transitions. [2021-01-06 19:48:53,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:48:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 8251 states and 10504 transitions. [2021-01-06 19:48:53,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:48:53,269 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:53,270 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:48:53,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-01-06 19:48:53,270 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:53,270 INFO L82 PathProgramCache]: Analyzing trace with hash 224764346, now seen corresponding path program 1 times [2021-01-06 19:48:53,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:53,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14092641] [2021-01-06 19:48:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 19:48:53,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14092641] [2021-01-06 19:48:53,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:53,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:48:53,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836241864] [2021-01-06 19:48:53,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:48:53,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:53,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:48:53,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:48:53,334 INFO L87 Difference]: Start difference. First operand 8251 states and 10504 transitions. Second operand 6 states. [2021-01-06 19:48:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:54,153 INFO L93 Difference]: Finished difference Result 15261 states and 19469 transitions. [2021-01-06 19:48:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:48:54,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2021-01-06 19:48:54,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:54,160 INFO L225 Difference]: With dead ends: 15261 [2021-01-06 19:48:54,160 INFO L226 Difference]: Without dead ends: 7073 [2021-01-06 19:48:54,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:48:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7073 states. [2021-01-06 19:48:54,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7073 to 7073. [2021-01-06 19:48:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7073 states. [2021-01-06 19:48:54,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7073 states to 7073 states and 8855 transitions. [2021-01-06 19:48:54,870 INFO L78 Accepts]: Start accepts. Automaton has 7073 states and 8855 transitions. Word has length 65 [2021-01-06 19:48:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:54,871 INFO L481 AbstractCegarLoop]: Abstraction has 7073 states and 8855 transitions. [2021-01-06 19:48:54,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:48:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 7073 states and 8855 transitions. [2021-01-06 19:48:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:48:54,872 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:54,873 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:48:54,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-01-06 19:48:54,873 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:54,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:54,873 INFO L82 PathProgramCache]: Analyzing trace with hash 67059962, now seen corresponding path program 1 times [2021-01-06 19:48:54,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:54,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375942255] [2021-01-06 19:48:54,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:54,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:48:54,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375942255] [2021-01-06 19:48:54,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:54,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 19:48:55,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810860645] [2021-01-06 19:48:55,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 19:48:55,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:55,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 19:48:55,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:48:55,001 INFO L87 Difference]: Start difference. First operand 7073 states and 8855 transitions. Second operand 7 states. [2021-01-06 19:48:55,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:55,817 INFO L93 Difference]: Finished difference Result 13117 states and 16497 transitions. [2021-01-06 19:48:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:48:55,818 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2021-01-06 19:48:55,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:55,823 INFO L225 Difference]: With dead ends: 13117 [2021-01-06 19:48:55,823 INFO L226 Difference]: Without dead ends: 6155 [2021-01-06 19:48:55,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:48:55,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6155 states. [2021-01-06 19:48:56,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6155 to 6153. [2021-01-06 19:48:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6153 states. [2021-01-06 19:48:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 7699 transitions. [2021-01-06 19:48:56,346 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 7699 transitions. Word has length 65 [2021-01-06 19:48:56,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:56,346 INFO L481 AbstractCegarLoop]: Abstraction has 6153 states and 7699 transitions. [2021-01-06 19:48:56,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 19:48:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 7699 transitions. [2021-01-06 19:48:56,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 19:48:56,347 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:56,347 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] [2021-01-06 19:48:56,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-01-06 19:48:56,348 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:56,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:56,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1467200301, now seen corresponding path program 1 times [2021-01-06 19:48:56,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:56,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514997254] [2021-01-06 19:48:56,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:57,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514997254] [2021-01-06 19:48:57,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676287682] [2021-01-06 19:48:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:48:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:57,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 19:48:57,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:48:57,893 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 19:48:58,299 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 46 [2021-01-06 19:48:58,919 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-01-06 19:48:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:58,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:48:58,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-01-06 19:48:58,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768087242] [2021-01-06 19:48:58,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 19:48:58,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:58,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 19:48:58,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 19:48:58,978 INFO L87 Difference]: Start difference. First operand 6153 states and 7699 transitions. Second operand 33 states. [2021-01-06 19:48:59,373 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2021-01-06 19:49:00,716 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2021-01-06 19:49:00,919 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2021-01-06 19:49:01,190 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-01-06 19:49:01,454 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-01-06 19:49:01,845 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2021-01-06 19:49:02,387 WARN L197 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2021-01-06 19:49:02,798 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2021-01-06 19:49:03,223 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2021-01-06 19:49:03,626 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-01-06 19:49:04,055 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2021-01-06 19:49:04,431 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2021-01-06 19:49:04,767 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2021-01-06 19:49:05,129 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2021-01-06 19:49:05,517 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-01-06 19:49:05,857 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2021-01-06 19:49:06,351 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-01-06 19:49:06,665 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-01-06 19:49:06,947 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-01-06 19:49:07,352 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2021-01-06 19:49:07,697 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2021-01-06 19:49:08,054 WARN L197 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2021-01-06 19:49:08,480 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2021-01-06 19:49:08,739 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2021-01-06 19:49:09,139 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-01-06 19:49:09,681 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2021-01-06 19:49:10,309 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-01-06 19:49:10,574 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-01-06 19:49:11,010 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-01-06 19:49:11,271 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-01-06 19:49:11,654 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2021-01-06 19:49:12,074 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2021-01-06 19:49:12,382 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-01-06 19:49:12,818 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-01-06 19:49:13,022 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-01-06 19:49:13,319 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2021-01-06 19:49:13,651 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-01-06 19:49:14,028 WARN L197 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2021-01-06 19:49:14,428 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-01-06 19:49:15,101 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-01-06 19:49:15,505 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-01-06 19:49:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:17,814 INFO L93 Difference]: Finished difference Result 21273 states and 26683 transitions. [2021-01-06 19:49:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 19:49:17,817 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2021-01-06 19:49:17,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:17,834 INFO L225 Difference]: With dead ends: 21273 [2021-01-06 19:49:17,834 INFO L226 Difference]: Without dead ends: 18044 [2021-01-06 19:49:17,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=1342, Invalid=6848, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 19:49:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18044 states. [2021-01-06 19:49:18,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18044 to 8655. [2021-01-06 19:49:18,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8655 states. [2021-01-06 19:49:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8655 states to 8655 states and 10815 transitions. [2021-01-06 19:49:18,768 INFO L78 Accepts]: Start accepts. Automaton has 8655 states and 10815 transitions. Word has length 66 [2021-01-06 19:49:18,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:18,769 INFO L481 AbstractCegarLoop]: Abstraction has 8655 states and 10815 transitions. [2021-01-06 19:49:18,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 19:49:18,769 INFO L276 IsEmpty]: Start isEmpty. Operand 8655 states and 10815 transitions. [2021-01-06 19:49:18,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 19:49:18,770 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:18,770 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] [2021-01-06 19:49:18,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:49:18,978 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:18,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:18,979 INFO L82 PathProgramCache]: Analyzing trace with hash 395112077, now seen corresponding path program 1 times [2021-01-06 19:49:18,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:18,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814602081] [2021-01-06 19:49:18,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:19,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814602081] [2021-01-06 19:49:19,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559356371] [2021-01-06 19:49:19,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:49:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:20,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 19:49:20,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:49:20,525 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 19:49:20,935 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 34 [2021-01-06 19:49:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:21,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:49:21,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-01-06 19:49:21,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888081002] [2021-01-06 19:49:21,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 19:49:21,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:21,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 19:49:21,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 19:49:21,505 INFO L87 Difference]: Start difference. First operand 8655 states and 10815 transitions. Second operand 33 states. [2021-01-06 19:49:21,715 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-01-06 19:49:22,679 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 19:49:23,009 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-01-06 19:49:23,459 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2021-01-06 19:49:23,996 WARN L197 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2021-01-06 19:49:24,556 WARN L197 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2021-01-06 19:49:25,256 WARN L197 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2021-01-06 19:49:25,949 WARN L197 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2021-01-06 19:49:26,367 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-01-06 19:49:26,842 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2021-01-06 19:49:27,296 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2021-01-06 19:49:27,657 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-01-06 19:49:28,036 WARN L197 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-01-06 19:49:28,591 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-01-06 19:49:28,907 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-01-06 19:49:29,203 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-01-06 19:49:29,579 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2021-01-06 19:49:29,948 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-01-06 19:49:31,196 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-01-06 19:49:31,522 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2021-01-06 19:49:31,805 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-01-06 19:49:32,171 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-01-06 19:49:32,762 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-01-06 19:49:33,401 WARN L197 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-01-06 19:49:33,890 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-01-06 19:49:34,586 WARN L197 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2021-01-06 19:49:34,813 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-01-06 19:49:35,086 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-01-06 19:49:35,810 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-01-06 19:49:36,103 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-01-06 19:49:36,457 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-01-06 19:49:36,857 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-01-06 19:49:37,271 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-01-06 19:49:38,263 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-01-06 19:49:38,699 WARN L197 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2021-01-06 19:49:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:39,954 INFO L93 Difference]: Finished difference Result 20993 states and 26718 transitions. [2021-01-06 19:49:39,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 19:49:39,956 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2021-01-06 19:49:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:39,977 INFO L225 Difference]: With dead ends: 20993 [2021-01-06 19:49:39,977 INFO L226 Difference]: Without dead ends: 16934 [2021-01-06 19:49:39,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=999, Invalid=5163, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 19:49:39,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16934 states. [2021-01-06 19:49:40,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16934 to 7122. [2021-01-06 19:49:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7122 states. [2021-01-06 19:49:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7122 states to 7122 states and 8908 transitions. [2021-01-06 19:49:40,847 INFO L78 Accepts]: Start accepts. Automaton has 7122 states and 8908 transitions. Word has length 66 [2021-01-06 19:49:40,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:40,847 INFO L481 AbstractCegarLoop]: Abstraction has 7122 states and 8908 transitions. [2021-01-06 19:49:40,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 19:49:40,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7122 states and 8908 transitions. [2021-01-06 19:49:40,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 19:49:40,848 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:40,848 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:49:41,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 19:49:41,049 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:41,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:41,050 INFO L82 PathProgramCache]: Analyzing trace with hash 855365469, now seen corresponding path program 1 times [2021-01-06 19:49:41,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:41,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508340318] [2021-01-06 19:49:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:42,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508340318] [2021-01-06 19:49:42,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528965439] [2021-01-06 19:49:42,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:49:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:42,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 19:49:42,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:49:42,893 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 19:49:43,370 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-01-06 19:49:44,101 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-01-06 19:49:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:44,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:49:44,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 32 [2021-01-06 19:49:44,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493145537] [2021-01-06 19:49:44,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 19:49:44,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:44,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 19:49:44,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2021-01-06 19:49:44,166 INFO L87 Difference]: Start difference. First operand 7122 states and 8908 transitions. Second operand 32 states. [2021-01-06 19:49:44,565 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2021-01-06 19:49:45,524 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2021-01-06 19:49:45,814 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2021-01-06 19:49:46,079 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2021-01-06 19:49:46,356 WARN L197 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-01-06 19:49:46,723 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2021-01-06 19:49:47,312 WARN L197 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2021-01-06 19:49:47,968 WARN L197 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2021-01-06 19:49:48,624 WARN L197 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2021-01-06 19:49:49,125 WARN L197 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2021-01-06 19:49:49,645 WARN L197 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2021-01-06 19:49:50,185 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2021-01-06 19:49:50,627 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-01-06 19:49:51,037 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-01-06 19:49:51,605 WARN L197 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2021-01-06 19:49:52,018 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-01-06 19:49:52,442 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-01-06 19:49:52,820 WARN L197 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-01-06 19:49:53,192 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-01-06 19:49:53,849 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2021-01-06 19:49:54,456 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-01-06 19:49:54,856 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2021-01-06 19:49:55,341 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-01-06 19:49:55,791 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-01-06 19:49:56,918 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-01-06 19:49:57,461 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 65 [2021-01-06 19:49:58,019 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2021-01-06 19:49:58,617 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 66 [2021-01-06 19:49:59,255 WARN L197 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2021-01-06 19:49:59,654 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2021-01-06 19:50:00,355 WARN L197 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 91 [2021-01-06 19:50:01,025 WARN L197 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2021-01-06 19:50:01,382 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-01-06 19:50:02,081 WARN L197 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2021-01-06 19:50:02,493 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-01-06 19:50:03,473 WARN L197 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 106 [2021-01-06 19:50:03,980 WARN L197 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2021-01-06 19:50:04,353 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2021-01-06 19:50:05,839 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-01-06 19:50:06,937 WARN L197 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2021-01-06 19:50:07,871 WARN L197 SmtUtils]: Spent 636.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2021-01-06 19:50:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:50:09,348 INFO L93 Difference]: Finished difference Result 21358 states and 27102 transitions. [2021-01-06 19:50:09,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 19:50:09,350 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 67 [2021-01-06 19:50:09,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:50:09,368 INFO L225 Difference]: With dead ends: 21358 [2021-01-06 19:50:09,368 INFO L226 Difference]: Without dead ends: 16499 [2021-01-06 19:50:09,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=1062, Invalid=5100, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 19:50:09,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16499 states. [2021-01-06 19:50:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16499 to 6110. [2021-01-06 19:50:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6110 states. [2021-01-06 19:50:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6110 states to 6110 states and 7674 transitions. [2021-01-06 19:50:10,204 INFO L78 Accepts]: Start accepts. Automaton has 6110 states and 7674 transitions. Word has length 67 [2021-01-06 19:50:10,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:50:10,204 INFO L481 AbstractCegarLoop]: Abstraction has 6110 states and 7674 transitions. [2021-01-06 19:50:10,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 19:50:10,204 INFO L276 IsEmpty]: Start isEmpty. Operand 6110 states and 7674 transitions. [2021-01-06 19:50:10,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 19:50:10,207 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:50:10,207 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:50:10,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:50:10,408 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:50:10,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:50:10,409 INFO L82 PathProgramCache]: Analyzing trace with hash 455078728, now seen corresponding path program 1 times [2021-01-06 19:50:10,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:50:10,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341631909] [2021-01-06 19:50:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:50:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:50:10,951 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 18 [2021-01-06 19:50:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 22 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:50:11,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341631909] [2021-01-06 19:50:11,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919195157] [2021-01-06 19:50:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:50:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:50:11,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 19:50:11,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:50:12,081 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 19:50:12,156 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:12,274 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:12,543 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:12,692 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:12,954 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:13,324 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:13,891 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:14,389 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:14,939 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:15,592 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:16,381 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:17,313 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:18,050 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:19,093 INFO L757 QuantifierPusher]: Run 120 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:20,838 INFO L757 QuantifierPusher]: Run 130 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:22,932 INFO L757 QuantifierPusher]: Run 140 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:25,213 INFO L757 QuantifierPusher]: Run 150 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:26,849 INFO L757 QuantifierPusher]: Run 160 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:28,064 INFO L757 QuantifierPusher]: Run 170 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:29,055 INFO L757 QuantifierPusher]: Run 180 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:30,077 INFO L757 QuantifierPusher]: Run 190 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:31,351 INFO L757 QuantifierPusher]: Run 200 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:32,871 INFO L757 QuantifierPusher]: Run 210 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:34,216 INFO L757 QuantifierPusher]: Run 220 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:36,158 INFO L757 QuantifierPusher]: Run 230 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:38,671 INFO L757 QuantifierPusher]: Run 240 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:41,880 INFO L757 QuantifierPusher]: Run 250 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:45,490 INFO L757 QuantifierPusher]: Run 260 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:49,320 INFO L757 QuantifierPusher]: Run 270 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:53,780 INFO L757 QuantifierPusher]: Run 280 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:57,210 INFO L757 QuantifierPusher]: Run 290 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:50:59,739 INFO L757 QuantifierPusher]: Run 300 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:02,441 INFO L757 QuantifierPusher]: Run 310 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:05,727 INFO L757 QuantifierPusher]: Run 320 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:09,220 INFO L757 QuantifierPusher]: Run 330 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:13,225 INFO L757 QuantifierPusher]: Run 340 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:17,487 INFO L757 QuantifierPusher]: Run 350 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:21,466 INFO L757 QuantifierPusher]: Run 360 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:26,047 INFO L757 QuantifierPusher]: Run 370 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:31,138 INFO L757 QuantifierPusher]: Run 380 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:36,492 INFO L757 QuantifierPusher]: Run 390 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:41,658 INFO L757 QuantifierPusher]: Run 400 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:47,295 INFO L757 QuantifierPusher]: Run 410 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:53,471 INFO L757 QuantifierPusher]: Run 420 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:51:59,533 INFO L757 QuantifierPusher]: Run 430 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug.