/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:50:09,732 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:50:09,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:50:09,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:50:09,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:50:09,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:50:09,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:50:09,810 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:50:09,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:50:09,836 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:50:09,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:50:09,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:50:09,841 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:50:09,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:50:09,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:50:09,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:50:09,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:50:09,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:50:09,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:50:09,861 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:50:09,863 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:50:09,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:50:09,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:50:09,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:50:09,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:50:09,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:50:09,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:50:09,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:50:09,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:50:09,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:50:09,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:50:09,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:50:09,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:50:09,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:50:09,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:50:09,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:50:09,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:50:09,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:50:09,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:50:09,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:50:09,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:50:09,890 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 09:50:09,916 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:50:09,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:50:09,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:50:09,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:50:09,918 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:50:09,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:50:09,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:50:09,918 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:50:09,919 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:50:09,919 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:50:09,919 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:50:09,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:50:09,919 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:50:09,920 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:50:09,920 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:50:09,920 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:50:09,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:50:09,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:50:09,921 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:50:09,921 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:50:09,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:50:09,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:50:09,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:50:09,922 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:50:09,922 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:50:09,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:50:10,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:50:10,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:50:10,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:50:10,314 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:50:10,315 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:50:10,316 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c [2020-12-23 09:50:10,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/475b22395/00a7f85efdb4490ba469f31543e3d003/FLAG66af3e233 [2020-12-23 09:50:11,049 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:50:11,050 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c [2020-12-23 09:50:11,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/475b22395/00a7f85efdb4490ba469f31543e3d003/FLAG66af3e233 [2020-12-23 09:50:11,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/475b22395/00a7f85efdb4490ba469f31543e3d003 [2020-12-23 09:50:11,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:50:11,338 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:50:11,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:50:11,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:50:11,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:50:11,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:50:11" (1/1) ... [2020-12-23 09:50:11,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c850cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:11, skipping insertion in model container [2020-12-23 09:50:11,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:50:11" (1/1) ... [2020-12-23 09:50:11,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:50:11,428 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[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m4~0,] left hand side expression in assignment: lhs: VariableLHS[~m4~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive4~0,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[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_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[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] [2020-12-23 09:50:11,709 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c[9433,9446] [2020-12-23 09:50:11,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:50:11,723 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[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m4~0,] left hand side expression in assignment: lhs: VariableLHS[~m4~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~alive4~0,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[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_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[~p4_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p4_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] [2020-12-23 09:50:11,785 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c[9433,9446] [2020-12-23 09:50:11,786 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:50:11,806 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:50:11,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:11 WrapperNode [2020-12-23 09:50:11,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:50:11,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:50:11,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:50:11,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:50:11,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:11" (1/1) ... [2020-12-23 09:50:11,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:11" (1/1) ... [2020-12-23 09:50:11,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:50:11,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:50:11,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:50:11,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:50:11,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:11" (1/1) ... [2020-12-23 09:50:11,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:11" (1/1) ... [2020-12-23 09:50:11,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:11" (1/1) ... [2020-12-23 09:50:11,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:11" (1/1) ... [2020-12-23 09:50:11,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:11" (1/1) ... [2020-12-23 09:50:11,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:11" (1/1) ... [2020-12-23 09:50:11,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:11" (1/1) ... [2020-12-23 09:50:11,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:50:11,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:50:11,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:50:11,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:50:11,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:50:12,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:50:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:50:12,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:50:12,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:50:12,917 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:50:12,918 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-23 09:50:12,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:50:12 BoogieIcfgContainer [2020-12-23 09:50:12,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:50:12,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:50:12,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:50:12,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:50:12,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:50:11" (1/3) ... [2020-12-23 09:50:12,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60405fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:50:12, skipping insertion in model container [2020-12-23 09:50:12,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:11" (2/3) ... [2020-12-23 09:50:12,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60405fd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:50:12, skipping insertion in model container [2020-12-23 09:50:12,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:50:12" (3/3) ... [2020-12-23 09:50:12,929 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c [2020-12-23 09:50:12,935 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:50:12,940 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:50:12,959 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:50:12,986 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:50:12,987 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:50:12,987 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:50:12,987 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:50:12,987 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:50:12,987 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:50:12,988 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:50:12,988 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:50:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states. [2020-12-23 09:50:13,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 09:50:13,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:13,015 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] [2020-12-23 09:50:13,015 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:13,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:13,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2019613380, now seen corresponding path program 1 times [2020-12-23 09:50:13,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:13,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484683962] [2020-12-23 09:50:13,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:13,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484683962] [2020-12-23 09:50:13,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:13,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:50:13,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491898199] [2020-12-23 09:50:13,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 09:50:13,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:13,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 09:50:13,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 09:50:13,259 INFO L87 Difference]: Start difference. First operand 100 states. Second operand 2 states. [2020-12-23 09:50:13,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:13,288 INFO L93 Difference]: Finished difference Result 171 states and 278 transitions. [2020-12-23 09:50:13,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 09:50:13,289 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 29 [2020-12-23 09:50:13,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:13,302 INFO L225 Difference]: With dead ends: 171 [2020-12-23 09:50:13,302 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 09:50:13,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 09:50:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 09:50:13,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-12-23 09:50:13,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 09:50:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 159 transitions. [2020-12-23 09:50:13,352 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 159 transitions. Word has length 29 [2020-12-23 09:50:13,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:13,353 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 159 transitions. [2020-12-23 09:50:13,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 09:50:13,353 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 159 transitions. [2020-12-23 09:50:13,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 09:50:13,355 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:13,355 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] [2020-12-23 09:50:13,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:50:13,356 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:13,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:13,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2141340410, now seen corresponding path program 1 times [2020-12-23 09:50:13,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:13,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921768218] [2020-12-23 09:50:13,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:13,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921768218] [2020-12-23 09:50:13,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:13,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:50:13,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029606272] [2020-12-23 09:50:13,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:50:13,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:13,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:50:13,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:50:13,484 INFO L87 Difference]: Start difference. First operand 96 states and 159 transitions. Second operand 5 states. [2020-12-23 09:50:13,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:13,636 INFO L93 Difference]: Finished difference Result 232 states and 373 transitions. [2020-12-23 09:50:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:13,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-23 09:50:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:13,640 INFO L225 Difference]: With dead ends: 232 [2020-12-23 09:50:13,640 INFO L226 Difference]: Without dead ends: 162 [2020-12-23 09:50:13,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:50:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-23 09:50:13,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2020-12-23 09:50:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 09:50:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-12-23 09:50:13,655 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 29 [2020-12-23 09:50:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:13,656 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-12-23 09:50:13,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:50:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-12-23 09:50:13,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 09:50:13,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:13,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:13,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:50:13,659 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:13,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:13,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1164590349, now seen corresponding path program 1 times [2020-12-23 09:50:13,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:13,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253014866] [2020-12-23 09:50:13,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:13,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253014866] [2020-12-23 09:50:13,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:13,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:13,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880641528] [2020-12-23 09:50:13,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:13,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:13,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:13,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:13,888 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 3 states. [2020-12-23 09:50:13,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:13,918 INFO L93 Difference]: Finished difference Result 216 states and 325 transitions. [2020-12-23 09:50:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:13,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-23 09:50:13,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:13,921 INFO L225 Difference]: With dead ends: 216 [2020-12-23 09:50:13,921 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 09:50:13,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 09:50:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-12-23 09:50:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-23 09:50:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 218 transitions. [2020-12-23 09:50:13,937 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 218 transitions. Word has length 52 [2020-12-23 09:50:13,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:13,937 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 218 transitions. [2020-12-23 09:50:13,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:13,938 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 218 transitions. [2020-12-23 09:50:13,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 09:50:13,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:13,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:13,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 09:50:13,940 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:13,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:13,941 INFO L82 PathProgramCache]: Analyzing trace with hash 502679627, now seen corresponding path program 1 times [2020-12-23 09:50:13,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:13,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921438053] [2020-12-23 09:50:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:14,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:14,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921438053] [2020-12-23 09:50:14,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:14,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:14,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414634715] [2020-12-23 09:50:14,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:14,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:14,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:14,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:14,100 INFO L87 Difference]: Start difference. First operand 148 states and 218 transitions. Second operand 3 states. [2020-12-23 09:50:14,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:14,132 INFO L93 Difference]: Finished difference Result 360 states and 554 transitions. [2020-12-23 09:50:14,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:14,133 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-23 09:50:14,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:14,135 INFO L225 Difference]: With dead ends: 360 [2020-12-23 09:50:14,135 INFO L226 Difference]: Without dead ends: 242 [2020-12-23 09:50:14,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:14,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-23 09:50:14,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 240. [2020-12-23 09:50:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-12-23 09:50:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 363 transitions. [2020-12-23 09:50:14,157 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 363 transitions. Word has length 53 [2020-12-23 09:50:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:14,158 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 363 transitions. [2020-12-23 09:50:14,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 363 transitions. [2020-12-23 09:50:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 09:50:14,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:14,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:14,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 09:50:14,161 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:14,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1405286019, now seen corresponding path program 1 times [2020-12-23 09:50:14,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:14,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983643589] [2020-12-23 09:50:14,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:14,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983643589] [2020-12-23 09:50:14,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:14,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:14,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796485258] [2020-12-23 09:50:14,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:14,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:14,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:14,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:14,231 INFO L87 Difference]: Start difference. First operand 240 states and 363 transitions. Second operand 3 states. [2020-12-23 09:50:14,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:14,272 INFO L93 Difference]: Finished difference Result 612 states and 949 transitions. [2020-12-23 09:50:14,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:14,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-23 09:50:14,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:14,276 INFO L225 Difference]: With dead ends: 612 [2020-12-23 09:50:14,276 INFO L226 Difference]: Without dead ends: 402 [2020-12-23 09:50:14,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-12-23 09:50:14,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-12-23 09:50:14,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-12-23 09:50:14,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 611 transitions. [2020-12-23 09:50:14,307 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 611 transitions. Word has length 54 [2020-12-23 09:50:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:14,307 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 611 transitions. [2020-12-23 09:50:14,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:14,308 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 611 transitions. [2020-12-23 09:50:14,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 09:50:14,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:14,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:14,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 09:50:14,310 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:14,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:14,311 INFO L82 PathProgramCache]: Analyzing trace with hash 417554395, now seen corresponding path program 1 times [2020-12-23 09:50:14,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:14,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616979388] [2020-12-23 09:50:14,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:14,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:14,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616979388] [2020-12-23 09:50:14,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:14,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:14,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817816210] [2020-12-23 09:50:14,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:14,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:14,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:14,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:14,393 INFO L87 Difference]: Start difference. First operand 400 states and 611 transitions. Second operand 3 states. [2020-12-23 09:50:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:14,462 INFO L93 Difference]: Finished difference Result 1044 states and 1613 transitions. [2020-12-23 09:50:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:14,463 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-23 09:50:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:14,468 INFO L225 Difference]: With dead ends: 1044 [2020-12-23 09:50:14,468 INFO L226 Difference]: Without dead ends: 674 [2020-12-23 09:50:14,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:14,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2020-12-23 09:50:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672. [2020-12-23 09:50:14,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2020-12-23 09:50:14,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1023 transitions. [2020-12-23 09:50:14,507 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1023 transitions. Word has length 55 [2020-12-23 09:50:14,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:14,508 INFO L481 AbstractCegarLoop]: Abstraction has 672 states and 1023 transitions. [2020-12-23 09:50:14,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1023 transitions. [2020-12-23 09:50:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 09:50:14,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:14,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:14,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 09:50:14,511 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:14,511 INFO L82 PathProgramCache]: Analyzing trace with hash -368690669, now seen corresponding path program 1 times [2020-12-23 09:50:14,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:14,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867438753] [2020-12-23 09:50:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:14,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867438753] [2020-12-23 09:50:14,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:14,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:14,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919100106] [2020-12-23 09:50:14,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:14,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:14,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:14,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:14,695 INFO L87 Difference]: Start difference. First operand 672 states and 1023 transitions. Second operand 6 states. [2020-12-23 09:50:14,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:14,908 INFO L93 Difference]: Finished difference Result 2952 states and 4499 transitions. [2020-12-23 09:50:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:14,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-12-23 09:50:14,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:14,955 INFO L225 Difference]: With dead ends: 2952 [2020-12-23 09:50:14,955 INFO L226 Difference]: Without dead ends: 2310 [2020-12-23 09:50:14,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2020-12-23 09:50:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2304. [2020-12-23 09:50:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2304 states. [2020-12-23 09:50:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3487 transitions. [2020-12-23 09:50:15,110 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3487 transitions. Word has length 56 [2020-12-23 09:50:15,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:15,110 INFO L481 AbstractCegarLoop]: Abstraction has 2304 states and 3487 transitions. [2020-12-23 09:50:15,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3487 transitions. [2020-12-23 09:50:15,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 09:50:15,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:15,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:15,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 09:50:15,113 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:15,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:15,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1031908864, now seen corresponding path program 1 times [2020-12-23 09:50:15,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:15,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895599217] [2020-12-23 09:50:15,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:15,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895599217] [2020-12-23 09:50:15,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:15,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:15,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349711236] [2020-12-23 09:50:15,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:15,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:15,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:15,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:15,228 INFO L87 Difference]: Start difference. First operand 2304 states and 3487 transitions. Second operand 6 states. [2020-12-23 09:50:15,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:15,675 INFO L93 Difference]: Finished difference Result 10426 states and 15844 transitions. [2020-12-23 09:50:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:15,676 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-12-23 09:50:15,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:15,716 INFO L225 Difference]: With dead ends: 10426 [2020-12-23 09:50:15,716 INFO L226 Difference]: Without dead ends: 8152 [2020-12-23 09:50:15,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:50:15,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8152 states. [2020-12-23 09:50:15,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8152 to 4576. [2020-12-23 09:50:15,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4576 states. [2020-12-23 09:50:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 6815 transitions. [2020-12-23 09:50:15,995 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 6815 transitions. Word has length 57 [2020-12-23 09:50:15,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:15,995 INFO L481 AbstractCegarLoop]: Abstraction has 4576 states and 6815 transitions. [2020-12-23 09:50:15,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:15,996 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 6815 transitions. [2020-12-23 09:50:15,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 09:50:15,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:15,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:15,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 09:50:15,997 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:15,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:15,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1541080392, now seen corresponding path program 1 times [2020-12-23 09:50:15,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:15,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895748163] [2020-12-23 09:50:15,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:16,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895748163] [2020-12-23 09:50:16,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:16,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 09:50:16,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009852092] [2020-12-23 09:50:16,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:50:16,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:16,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:50:16,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:50:16,163 INFO L87 Difference]: Start difference. First operand 4576 states and 6815 transitions. Second operand 8 states. [2020-12-23 09:50:16,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:16,834 INFO L93 Difference]: Finished difference Result 9634 states and 14112 transitions. [2020-12-23 09:50:16,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:50:16,836 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-12-23 09:50:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:16,883 INFO L225 Difference]: With dead ends: 9634 [2020-12-23 09:50:16,883 INFO L226 Difference]: Without dead ends: 9632 [2020-12-23 09:50:16,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:50:16,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2020-12-23 09:50:17,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 4960. [2020-12-23 09:50:17,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4960 states. [2020-12-23 09:50:17,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 7199 transitions. [2020-12-23 09:50:17,253 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 7199 transitions. Word has length 58 [2020-12-23 09:50:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:17,254 INFO L481 AbstractCegarLoop]: Abstraction has 4960 states and 7199 transitions. [2020-12-23 09:50:17,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:50:17,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 7199 transitions. [2020-12-23 09:50:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 09:50:17,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:17,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:17,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 09:50:17,256 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:17,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:17,256 INFO L82 PathProgramCache]: Analyzing trace with hash 581430488, now seen corresponding path program 1 times [2020-12-23 09:50:17,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:17,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547600042] [2020-12-23 09:50:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:17,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547600042] [2020-12-23 09:50:17,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:17,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:17,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655202172] [2020-12-23 09:50:17,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:17,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:17,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:17,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:17,304 INFO L87 Difference]: Start difference. First operand 4960 states and 7199 transitions. Second operand 3 states. [2020-12-23 09:50:17,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:17,662 INFO L93 Difference]: Finished difference Result 11966 states and 17395 transitions. [2020-12-23 09:50:17,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:17,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-23 09:50:17,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:17,698 INFO L225 Difference]: With dead ends: 11966 [2020-12-23 09:50:17,698 INFO L226 Difference]: Without dead ends: 7036 [2020-12-23 09:50:17,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:17,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7036 states. [2020-12-23 09:50:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7036 to 7034. [2020-12-23 09:50:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7034 states. [2020-12-23 09:50:18,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 10169 transitions. [2020-12-23 09:50:18,149 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 10169 transitions. Word has length 59 [2020-12-23 09:50:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:18,149 INFO L481 AbstractCegarLoop]: Abstraction has 7034 states and 10169 transitions. [2020-12-23 09:50:18,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:18,150 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 10169 transitions. [2020-12-23 09:50:18,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 09:50:18,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:18,155 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:18,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 09:50:18,155 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:18,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:18,156 INFO L82 PathProgramCache]: Analyzing trace with hash 418253800, now seen corresponding path program 1 times [2020-12-23 09:50:18,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:18,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931752904] [2020-12-23 09:50:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:18,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931752904] [2020-12-23 09:50:18,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409415048] [2020-12-23 09:50:18,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:50:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:18,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 09:50:18,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:50:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:50:18,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:50:18,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 14 [2020-12-23 09:50:18,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97017920] [2020-12-23 09:50:18,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:50:18,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:18,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:50:18,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:50:18,946 INFO L87 Difference]: Start difference. First operand 7034 states and 10169 transitions. Second operand 14 states. [2020-12-23 09:50:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:26,450 INFO L93 Difference]: Finished difference Result 59660 states and 85311 transitions. [2020-12-23 09:50:26,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 09:50:26,450 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-12-23 09:50:26,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:26,573 INFO L225 Difference]: With dead ends: 59660 [2020-12-23 09:50:26,573 INFO L226 Difference]: Without dead ends: 52658 [2020-12-23 09:50:26,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2034 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1111, Invalid=4741, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 09:50:26,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52658 states. [2020-12-23 09:50:28,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52658 to 25818. [2020-12-23 09:50:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25818 states. [2020-12-23 09:50:28,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25818 states to 25818 states and 36773 transitions. [2020-12-23 09:50:28,893 INFO L78 Accepts]: Start accepts. Automaton has 25818 states and 36773 transitions. Word has length 82 [2020-12-23 09:50:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:28,894 INFO L481 AbstractCegarLoop]: Abstraction has 25818 states and 36773 transitions. [2020-12-23 09:50:28,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:50:28,894 INFO L276 IsEmpty]: Start isEmpty. Operand 25818 states and 36773 transitions. [2020-12-23 09:50:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:28,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:28,902 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:29,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 09:50:29,111 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:29,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:29,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1918927774, now seen corresponding path program 1 times [2020-12-23 09:50:29,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:29,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936949862] [2020-12-23 09:50:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:29,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:29,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936949862] [2020-12-23 09:50:29,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:29,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:29,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047860147] [2020-12-23 09:50:29,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:29,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:29,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:29,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:29,191 INFO L87 Difference]: Start difference. First operand 25818 states and 36773 transitions. Second operand 3 states. [2020-12-23 09:50:30,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:30,759 INFO L93 Difference]: Finished difference Result 61578 states and 87635 transitions. [2020-12-23 09:50:30,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:30,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-23 09:50:30,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:30,843 INFO L225 Difference]: With dead ends: 61578 [2020-12-23 09:50:30,843 INFO L226 Difference]: Without dead ends: 40912 [2020-12-23 09:50:30,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40912 states. [2020-12-23 09:50:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40912 to 39254. [2020-12-23 09:50:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39254 states. [2020-12-23 09:50:33,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39254 states to 39254 states and 55297 transitions. [2020-12-23 09:50:33,203 INFO L78 Accepts]: Start accepts. Automaton has 39254 states and 55297 transitions. Word has length 83 [2020-12-23 09:50:33,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:33,203 INFO L481 AbstractCegarLoop]: Abstraction has 39254 states and 55297 transitions. [2020-12-23 09:50:33,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:33,203 INFO L276 IsEmpty]: Start isEmpty. Operand 39254 states and 55297 transitions. [2020-12-23 09:50:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:33,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:33,214 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:33,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 09:50:33,214 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:33,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1917030416, now seen corresponding path program 1 times [2020-12-23 09:50:33,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:33,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758398002] [2020-12-23 09:50:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:33,285 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 09:50:33,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758398002] [2020-12-23 09:50:33,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:33,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:50:33,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049832057] [2020-12-23 09:50:33,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:33,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:33,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:33,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:33,287 INFO L87 Difference]: Start difference. First operand 39254 states and 55297 transitions. Second operand 6 states. [2020-12-23 09:50:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:36,052 INFO L93 Difference]: Finished difference Result 98610 states and 139239 transitions. [2020-12-23 09:50:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:36,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-23 09:50:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:36,177 INFO L225 Difference]: With dead ends: 98610 [2020-12-23 09:50:36,177 INFO L226 Difference]: Without dead ends: 59395 [2020-12-23 09:50:36,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:50:36,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59395 states. [2020-12-23 09:50:38,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59395 to 51553. [2020-12-23 09:50:38,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51553 states. [2020-12-23 09:50:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51553 states to 51553 states and 71626 transitions. [2020-12-23 09:50:38,927 INFO L78 Accepts]: Start accepts. Automaton has 51553 states and 71626 transitions. Word has length 83 [2020-12-23 09:50:38,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:38,928 INFO L481 AbstractCegarLoop]: Abstraction has 51553 states and 71626 transitions. [2020-12-23 09:50:38,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:38,928 INFO L276 IsEmpty]: Start isEmpty. Operand 51553 states and 71626 transitions. [2020-12-23 09:50:38,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:38,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:38,945 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:38,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 09:50:38,946 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:38,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:38,946 INFO L82 PathProgramCache]: Analyzing trace with hash 396113720, now seen corresponding path program 1 times [2020-12-23 09:50:38,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:38,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021583989] [2020-12-23 09:50:38,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:39,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021583989] [2020-12-23 09:50:39,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:39,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:39,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692758927] [2020-12-23 09:50:39,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:39,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:39,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:39,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:39,013 INFO L87 Difference]: Start difference. First operand 51553 states and 71626 transitions. Second operand 3 states. [2020-12-23 09:50:42,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:42,526 INFO L93 Difference]: Finished difference Result 123837 states and 172228 transitions. [2020-12-23 09:50:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:42,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-23 09:50:42,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:42,767 INFO L225 Difference]: With dead ends: 123837 [2020-12-23 09:50:42,767 INFO L226 Difference]: Without dead ends: 78723 [2020-12-23 09:50:42,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:42,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78723 states. [2020-12-23 09:50:46,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78723 to 69845. [2020-12-23 09:50:46,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69845 states. [2020-12-23 09:50:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69845 states to 69845 states and 96374 transitions. [2020-12-23 09:50:46,471 INFO L78 Accepts]: Start accepts. Automaton has 69845 states and 96374 transitions. Word has length 83 [2020-12-23 09:50:46,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:46,471 INFO L481 AbstractCegarLoop]: Abstraction has 69845 states and 96374 transitions. [2020-12-23 09:50:46,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:46,472 INFO L276 IsEmpty]: Start isEmpty. Operand 69845 states and 96374 transitions. [2020-12-23 09:50:46,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:46,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:46,489 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:46,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 09:50:46,490 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:46,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:46,490 INFO L82 PathProgramCache]: Analyzing trace with hash -679069464, now seen corresponding path program 1 times [2020-12-23 09:50:46,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:46,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975454003] [2020-12-23 09:50:46,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 09:50:46,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975454003] [2020-12-23 09:50:46,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:46,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:46,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598211109] [2020-12-23 09:50:46,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:46,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:46,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:46,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:46,590 INFO L87 Difference]: Start difference. First operand 69845 states and 96374 transitions. Second operand 6 states. [2020-12-23 09:50:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:51,967 INFO L93 Difference]: Finished difference Result 141995 states and 197431 transitions. [2020-12-23 09:50:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:51,968 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-23 09:50:51,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:52,117 INFO L225 Difference]: With dead ends: 141995 [2020-12-23 09:50:52,117 INFO L226 Difference]: Without dead ends: 128553 [2020-12-23 09:50:52,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:50:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128553 states. [2020-12-23 09:50:56,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128553 to 82709. [2020-12-23 09:50:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82709 states. [2020-12-23 09:50:56,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82709 states to 82709 states and 113974 transitions. [2020-12-23 09:50:56,860 INFO L78 Accepts]: Start accepts. Automaton has 82709 states and 113974 transitions. Word has length 83 [2020-12-23 09:50:56,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:56,860 INFO L481 AbstractCegarLoop]: Abstraction has 82709 states and 113974 transitions. [2020-12-23 09:50:56,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:56,860 INFO L276 IsEmpty]: Start isEmpty. Operand 82709 states and 113974 transitions. [2020-12-23 09:50:56,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:56,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:56,879 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:56,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 09:50:56,880 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:56,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:56,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1106415528, now seen corresponding path program 1 times [2020-12-23 09:50:56,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:56,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262655233] [2020-12-23 09:50:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:56,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262655233] [2020-12-23 09:50:56,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:56,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:56,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080994104] [2020-12-23 09:50:56,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:56,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:56,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:56,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:56,949 INFO L87 Difference]: Start difference. First operand 82709 states and 113974 transitions. Second operand 3 states. [2020-12-23 09:51:02,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:02,680 INFO L93 Difference]: Finished difference Result 189795 states and 259787 transitions. [2020-12-23 09:51:02,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:51:02,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-23 09:51:02,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:02,852 INFO L225 Difference]: With dead ends: 189795 [2020-12-23 09:51:02,852 INFO L226 Difference]: Without dead ends: 125729 [2020-12-23 09:51:02,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:51:02,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125729 states. [2020-12-23 09:51:09,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125729 to 120867. [2020-12-23 09:51:09,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120867 states. [2020-12-23 09:51:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120867 states to 120867 states and 163701 transitions. [2020-12-23 09:51:09,199 INFO L78 Accepts]: Start accepts. Automaton has 120867 states and 163701 transitions. Word has length 83 [2020-12-23 09:51:09,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:09,200 INFO L481 AbstractCegarLoop]: Abstraction has 120867 states and 163701 transitions. [2020-12-23 09:51:09,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:51:09,200 INFO L276 IsEmpty]: Start isEmpty. Operand 120867 states and 163701 transitions. [2020-12-23 09:51:09,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:51:09,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:09,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:51:09,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 09:51:09,217 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:09,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:09,217 INFO L82 PathProgramCache]: Analyzing trace with hash 576343346, now seen corresponding path program 1 times [2020-12-23 09:51:09,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:09,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141632208] [2020-12-23 09:51:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:09,480 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2020-12-23 09:51:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 09:51:09,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141632208] [2020-12-23 09:51:09,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:51:09,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:51:09,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079318935] [2020-12-23 09:51:09,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:51:09,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:09,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:51:09,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:51:09,522 INFO L87 Difference]: Start difference. First operand 120867 states and 163701 transitions. Second operand 6 states. [2020-12-23 09:51:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:19,599 INFO L93 Difference]: Finished difference Result 249219 states and 340620 transitions. [2020-12-23 09:51:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:51:19,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-23 09:51:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:19,925 INFO L225 Difference]: With dead ends: 249219 [2020-12-23 09:51:19,925 INFO L226 Difference]: Without dead ends: 210833 [2020-12-23 09:51:19,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:51:20,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210833 states. [2020-12-23 09:51:28,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210833 to 157523. [2020-12-23 09:51:28,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157523 states. [2020-12-23 09:51:28,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157523 states to 157523 states and 213157 transitions. [2020-12-23 09:51:28,694 INFO L78 Accepts]: Start accepts. Automaton has 157523 states and 213157 transitions. Word has length 83 [2020-12-23 09:51:28,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:28,694 INFO L481 AbstractCegarLoop]: Abstraction has 157523 states and 213157 transitions. [2020-12-23 09:51:28,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:51:28,695 INFO L276 IsEmpty]: Start isEmpty. Operand 157523 states and 213157 transitions. [2020-12-23 09:51:28,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:51:28,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:28,709 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:51:28,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 09:51:28,709 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:28,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:28,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1007327224, now seen corresponding path program 1 times [2020-12-23 09:51:28,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:28,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965317424] [2020-12-23 09:51:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 09:51:28,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965317424] [2020-12-23 09:51:28,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:51:28,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:51:28,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778061089] [2020-12-23 09:51:28,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:51:28,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:28,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:51:28,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:51:28,814 INFO L87 Difference]: Start difference. First operand 157523 states and 213157 transitions. Second operand 6 states. [2020-12-23 09:51:41,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:41,129 INFO L93 Difference]: Finished difference Result 292923 states and 399976 transitions. [2020-12-23 09:51:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:51:41,130 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-23 09:51:41,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:41,667 INFO L225 Difference]: With dead ends: 292923 [2020-12-23 09:51:41,667 INFO L226 Difference]: Without dead ends: 247201 [2020-12-23 09:51:41,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:51:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247201 states. [2020-12-23 09:51:52,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247201 to 192281. [2020-12-23 09:51:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192281 states. [2020-12-23 09:51:53,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192281 states to 192281 states and 260487 transitions. [2020-12-23 09:51:53,171 INFO L78 Accepts]: Start accepts. Automaton has 192281 states and 260487 transitions. Word has length 83 [2020-12-23 09:51:53,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:53,171 INFO L481 AbstractCegarLoop]: Abstraction has 192281 states and 260487 transitions. [2020-12-23 09:51:53,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:51:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 192281 states and 260487 transitions. [2020-12-23 09:51:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 09:51:53,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:53,193 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:51:53,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 09:51:53,194 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:53,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:53,194 INFO L82 PathProgramCache]: Analyzing trace with hash -548102794, now seen corresponding path program 1 times [2020-12-23 09:51:53,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:53,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966432521] [2020-12-23 09:51:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:51:53,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966432521] [2020-12-23 09:51:53,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:51:53,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:51:53,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413235435] [2020-12-23 09:51:53,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:51:53,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:53,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:51:53,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:51:53,288 INFO L87 Difference]: Start difference. First operand 192281 states and 260487 transitions. Second operand 6 states. [2020-12-23 09:52:07,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:52:07,632 INFO L93 Difference]: Finished difference Result 303039 states and 413638 transitions. [2020-12-23 09:52:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:52:07,633 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-12-23 09:52:07,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:52:08,118 INFO L225 Difference]: With dead ends: 303039 [2020-12-23 09:52:08,119 INFO L226 Difference]: Without dead ends: 274297 [2020-12-23 09:52:08,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:52:08,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274297 states. [2020-12-23 09:52:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274297 to 213267. [2020-12-23 09:52:20,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213267 states. [2020-12-23 09:52:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213267 states to 213267 states and 289331 transitions. [2020-12-23 09:52:21,748 INFO L78 Accepts]: Start accepts. Automaton has 213267 states and 289331 transitions. Word has length 84 [2020-12-23 09:52:21,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:52:21,763 INFO L481 AbstractCegarLoop]: Abstraction has 213267 states and 289331 transitions. [2020-12-23 09:52:21,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:52:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 213267 states and 289331 transitions. [2020-12-23 09:52:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 09:52:21,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:52:21,782 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:52:21,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 09:52:21,783 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:52:21,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:52:21,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1864221152, now seen corresponding path program 1 times [2020-12-23 09:52:21,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:52:21,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090364961] [2020-12-23 09:52:21,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:52:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:52:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:52:21,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090364961] [2020-12-23 09:52:21,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:52:21,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:52:21,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513611792] [2020-12-23 09:52:21,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:52:21,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:52:21,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:52:21,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:52:21,857 INFO L87 Difference]: Start difference. First operand 213267 states and 289331 transitions. Second operand 3 states.