/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.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:50:14,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:50:14,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:50:14,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:50:14,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:50:14,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:50:14,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:50:14,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:50:14,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:50:14,736 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:50:14,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:50:14,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:50:14,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:50:14,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:50:14,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:50:14,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:50:14,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:50:14,761 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:50:14,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:50:14,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:50:14,775 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:50:14,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:50:14,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:50:14,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:50:14,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:50:14,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:50:14,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:50:14,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:50:14,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:50:14,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:50:14,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:50:14,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:50:14,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:50:14,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:50:14,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:50:14,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:50:14,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:50:14,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:50:14,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:50:14,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:50:14,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:50:14,819 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 09:50:14,864 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:50:14,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:50:14,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:50:14,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:50:14,866 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:50:14,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:50:14,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:50:14,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:50:14,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:50:14,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:50:14,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:50:14,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:50:14,868 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:50:14,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:50:14,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:50:14,868 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:50:14,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:50:14,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:50:14,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:50:14,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:50:14,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:50:14,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:50:14,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:50:14,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:50:14,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:50:14,871 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:50:15,222 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:50:15,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:50:15,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:50:15,261 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:50:15,262 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:50:15,263 INFO L432 ainManager$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.UNBOUNDED.pals.c [2020-12-23 09:50:15,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/39e28b998/f470817af6494eb5b8b7c3d60abc47cf/FLAG49a01e364 [2020-12-23 09:50:16,173 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:50:16,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c [2020-12-23 09:50:16,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/39e28b998/f470817af6494eb5b8b7c3d60abc47cf/FLAG49a01e364 [2020-12-23 09:50:16,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/39e28b998/f470817af6494eb5b8b7c3d60abc47cf [2020-12-23 09:50:16,487 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:50:16,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:50:16,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:50:16,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:50:16,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:50:16,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:50:16" (1/1) ... [2020-12-23 09:50:16,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f56d7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:16, skipping insertion in model container [2020-12-23 09:50:16,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:50:16" (1/1) ... [2020-12-23 09:50:16,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:50:16,576 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~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 09:50:16,813 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.UNBOUNDED.pals.c[9529,9542] [2020-12-23 09:50:16,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:50:16,831 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~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 09:50:16,902 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.UNBOUNDED.pals.c[9529,9542] [2020-12-23 09:50:16,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:50:16,931 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:50:16,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:16 WrapperNode [2020-12-23 09:50:16,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:50:16,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:50:16,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:50:16,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:50:16,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:16" (1/1) ... [2020-12-23 09:50:16,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:16" (1/1) ... [2020-12-23 09:50:17,001 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:50:17,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:50:17,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:50:17,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:50:17,017 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:16" (1/1) ... [2020-12-23 09:50:17,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:16" (1/1) ... [2020-12-23 09:50:17,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:16" (1/1) ... [2020-12-23 09:50:17,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:16" (1/1) ... [2020-12-23 09:50:17,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:16" (1/1) ... [2020-12-23 09:50:17,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:16" (1/1) ... [2020-12-23 09:50:17,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:16" (1/1) ... [2020-12-23 09:50:17,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:50:17,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:50:17,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:50:17,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:50:17,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:16" (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 09:50:17,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:50:17,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:50:17,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:50:17,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:50:18,266 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:50:18,267 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-23 09:50:18,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:50:18 BoogieIcfgContainer [2020-12-23 09:50:18,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:50:18,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:50:18,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:50:18,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:50:18,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:50:16" (1/3) ... [2020-12-23 09:50:18,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2228ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:50:18, skipping insertion in model container [2020-12-23 09:50:18,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:50:16" (2/3) ... [2020-12-23 09:50:18,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2228ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:50:18, skipping insertion in model container [2020-12-23 09:50:18,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:50:18" (3/3) ... [2020-12-23 09:50:18,278 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c [2020-12-23 09:50:18,285 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:50:18,290 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:50:18,309 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:50:18,336 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:50:18,337 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:50:18,337 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:50:18,337 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:50:18,337 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:50:18,337 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:50:18,337 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:50:18,337 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:50:18,355 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states. [2020-12-23 09:50:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 09:50:18,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:18,364 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] [2020-12-23 09:50:18,364 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:18,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:18,371 INFO L82 PathProgramCache]: Analyzing trace with hash 773042370, now seen corresponding path program 1 times [2020-12-23 09:50:18,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:18,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898966159] [2020-12-23 09:50:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:18,609 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 09:50:18,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898966159] [2020-12-23 09:50:18,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:18,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:50:18,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598099271] [2020-12-23 09:50:18,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 09:50:18,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:18,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 09:50:18,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 09:50:18,638 INFO L87 Difference]: Start difference. First operand 101 states. Second operand 2 states. [2020-12-23 09:50:18,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:18,671 INFO L93 Difference]: Finished difference Result 169 states and 279 transitions. [2020-12-23 09:50:18,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 09:50:18,673 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-12-23 09:50:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:18,686 INFO L225 Difference]: With dead ends: 169 [2020-12-23 09:50:18,686 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 09:50:18,690 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 09:50:18,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 09:50:18,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-23 09:50:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 09:50:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 161 transitions. [2020-12-23 09:50:18,741 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 161 transitions. Word has length 30 [2020-12-23 09:50:18,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:18,742 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 161 transitions. [2020-12-23 09:50:18,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 09:50:18,742 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 161 transitions. [2020-12-23 09:50:18,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 09:50:18,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:18,745 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] [2020-12-23 09:50:18,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:50:18,745 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:18,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:18,747 INFO L82 PathProgramCache]: Analyzing trace with hash 913590980, now seen corresponding path program 1 times [2020-12-23 09:50:18,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:18,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195580510] [2020-12-23 09:50:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:18,909 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 09:50:18,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195580510] [2020-12-23 09:50:18,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:18,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:50:18,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465080723] [2020-12-23 09:50:18,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:50:18,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:18,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:50:18,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:50:18,915 INFO L87 Difference]: Start difference. First operand 97 states and 161 transitions. Second operand 5 states. [2020-12-23 09:50:19,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:19,065 INFO L93 Difference]: Finished difference Result 168 states and 272 transitions. [2020-12-23 09:50:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:50:19,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-12-23 09:50:19,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:19,068 INFO L225 Difference]: With dead ends: 168 [2020-12-23 09:50:19,069 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 09:50:19,070 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 09:50:19,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 09:50:19,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-23 09:50:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 09:50:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 137 transitions. [2020-12-23 09:50:19,081 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 137 transitions. Word has length 30 [2020-12-23 09:50:19,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:19,081 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 137 transitions. [2020-12-23 09:50:19,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:50:19,082 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 137 transitions. [2020-12-23 09:50:19,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 09:50:19,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:19,084 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 09:50:19,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:50:19,084 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:19,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:19,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1508952555, now seen corresponding path program 1 times [2020-12-23 09:50:19,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:19,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582563726] [2020-12-23 09:50:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:19,302 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 09:50:19,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582563726] [2020-12-23 09:50:19,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:19,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:19,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237844316] [2020-12-23 09:50:19,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:19,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:19,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:19,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:19,324 INFO L87 Difference]: Start difference. First operand 97 states and 137 transitions. Second operand 3 states. [2020-12-23 09:50:19,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:19,379 INFO L93 Difference]: Finished difference Result 219 states and 331 transitions. [2020-12-23 09:50:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:19,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 53 [2020-12-23 09:50:19,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:19,383 INFO L225 Difference]: With dead ends: 219 [2020-12-23 09:50:19,384 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 09:50:19,389 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 09:50:19,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 09:50:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2020-12-23 09:50:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 09:50:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 222 transitions. [2020-12-23 09:50:19,416 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 222 transitions. Word has length 53 [2020-12-23 09:50:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:19,420 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 222 transitions. [2020-12-23 09:50:19,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:19,420 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 222 transitions. [2020-12-23 09:50:19,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 09:50:19,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:19,424 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 09:50:19,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 09:50:19,424 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:19,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1759991574, now seen corresponding path program 1 times [2020-12-23 09:50:19,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:19,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994662192] [2020-12-23 09:50:19,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:19,537 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 09:50:19,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994662192] [2020-12-23 09:50:19,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:19,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:19,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53852034] [2020-12-23 09:50:19,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:19,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:19,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:19,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:19,540 INFO L87 Difference]: Start difference. First operand 150 states and 222 transitions. Second operand 3 states. [2020-12-23 09:50:19,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:19,574 INFO L93 Difference]: Finished difference Result 366 states and 566 transitions. [2020-12-23 09:50:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:19,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-23 09:50:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:19,578 INFO L225 Difference]: With dead ends: 366 [2020-12-23 09:50:19,578 INFO L226 Difference]: Without dead ends: 246 [2020-12-23 09:50:19,580 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 09:50:19,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-23 09:50:19,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2020-12-23 09:50:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-12-23 09:50:19,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 371 transitions. [2020-12-23 09:50:19,603 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 371 transitions. Word has length 54 [2020-12-23 09:50:19,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:19,603 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 371 transitions. [2020-12-23 09:50:19,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:19,603 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 371 transitions. [2020-12-23 09:50:19,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 09:50:19,605 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:19,606 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 09:50:19,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 09:50:19,606 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:19,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1078196827, now seen corresponding path program 1 times [2020-12-23 09:50:19,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:19,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274052252] [2020-12-23 09:50:19,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:19,725 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 09:50:19,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274052252] [2020-12-23 09:50:19,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:19,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:19,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798121413] [2020-12-23 09:50:19,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:19,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:19,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:19,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:19,729 INFO L87 Difference]: Start difference. First operand 244 states and 371 transitions. Second operand 3 states. [2020-12-23 09:50:19,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:19,799 INFO L93 Difference]: Finished difference Result 624 states and 973 transitions. [2020-12-23 09:50:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:19,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2020-12-23 09:50:19,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:19,806 INFO L225 Difference]: With dead ends: 624 [2020-12-23 09:50:19,806 INFO L226 Difference]: Without dead ends: 410 [2020-12-23 09:50:19,812 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 09:50:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-12-23 09:50:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-12-23 09:50:19,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-12-23 09:50:19,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 627 transitions. [2020-12-23 09:50:19,876 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 627 transitions. Word has length 55 [2020-12-23 09:50:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:19,876 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 627 transitions. [2020-12-23 09:50:19,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 627 transitions. [2020-12-23 09:50:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 09:50:19,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:19,882 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 09:50:19,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 09:50:19,883 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:19,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1363611750, now seen corresponding path program 1 times [2020-12-23 09:50:19,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:19,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850155733] [2020-12-23 09:50:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:20,064 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 09:50:20,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850155733] [2020-12-23 09:50:20,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:20,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:20,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840179275] [2020-12-23 09:50:20,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:20,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:20,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:20,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:20,067 INFO L87 Difference]: Start difference. First operand 408 states and 627 transitions. Second operand 6 states. [2020-12-23 09:50:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:20,313 INFO L93 Difference]: Finished difference Result 1764 states and 2747 transitions. [2020-12-23 09:50:20,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:20,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-12-23 09:50:20,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:20,326 INFO L225 Difference]: With dead ends: 1764 [2020-12-23 09:50:20,326 INFO L226 Difference]: Without dead ends: 1386 [2020-12-23 09:50:20,327 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 09:50:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2020-12-23 09:50:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1380. [2020-12-23 09:50:20,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1380 states. [2020-12-23 09:50:20,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2139 transitions. [2020-12-23 09:50:20,413 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2139 transitions. Word has length 56 [2020-12-23 09:50:20,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:20,414 INFO L481 AbstractCegarLoop]: Abstraction has 1380 states and 2139 transitions. [2020-12-23 09:50:20,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:20,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2139 transitions. [2020-12-23 09:50:20,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 09:50:20,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:20,416 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 09:50:20,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 09:50:20,416 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:20,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:20,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2107679122, now seen corresponding path program 1 times [2020-12-23 09:50:20,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:20,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655203305] [2020-12-23 09:50:20,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:20,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:20,472 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 09:50:20,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655203305] [2020-12-23 09:50:20,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:20,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:20,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365866684] [2020-12-23 09:50:20,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:20,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:20,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:20,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:20,475 INFO L87 Difference]: Start difference. First operand 1380 states and 2139 transitions. Second operand 3 states. [2020-12-23 09:50:20,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:20,564 INFO L93 Difference]: Finished difference Result 3656 states and 5661 transitions. [2020-12-23 09:50:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:20,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 57 [2020-12-23 09:50:20,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:20,578 INFO L225 Difference]: With dead ends: 3656 [2020-12-23 09:50:20,578 INFO L226 Difference]: Without dead ends: 2306 [2020-12-23 09:50:20,581 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 09:50:20,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2020-12-23 09:50:20,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2304. [2020-12-23 09:50:20,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2304 states. [2020-12-23 09:50:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3519 transitions. [2020-12-23 09:50:20,691 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3519 transitions. Word has length 57 [2020-12-23 09:50:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:20,692 INFO L481 AbstractCegarLoop]: Abstraction has 2304 states and 3519 transitions. [2020-12-23 09:50:20,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3519 transitions. [2020-12-23 09:50:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 09:50:20,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:20,693 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 09:50:20,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 09:50:20,694 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:20,694 INFO L82 PathProgramCache]: Analyzing trace with hash 903862406, now seen corresponding path program 1 times [2020-12-23 09:50:20,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:20,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532729402] [2020-12-23 09:50:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:20,863 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 09:50:20,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532729402] [2020-12-23 09:50:20,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:20,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:20,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826521593] [2020-12-23 09:50:20,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:20,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:20,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:20,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:20,866 INFO L87 Difference]: Start difference. First operand 2304 states and 3519 transitions. Second operand 6 states. [2020-12-23 09:50:21,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:21,330 INFO L93 Difference]: Finished difference Result 10426 states and 15988 transitions. [2020-12-23 09:50:21,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:21,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-12-23 09:50:21,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:21,397 INFO L225 Difference]: With dead ends: 10426 [2020-12-23 09:50:21,397 INFO L226 Difference]: Without dead ends: 8152 [2020-12-23 09:50:21,402 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 09:50:21,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8152 states. [2020-12-23 09:50:21,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8152 to 4576. [2020-12-23 09:50:21,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4576 states. [2020-12-23 09:50:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 6879 transitions. [2020-12-23 09:50:21,678 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 6879 transitions. Word has length 57 [2020-12-23 09:50:21,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:21,680 INFO L481 AbstractCegarLoop]: Abstraction has 4576 states and 6879 transitions. [2020-12-23 09:50:21,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:21,680 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 6879 transitions. [2020-12-23 09:50:21,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 09:50:21,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:21,681 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 09:50:21,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 09:50:21,682 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:21,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:21,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1866607497, now seen corresponding path program 1 times [2020-12-23 09:50:21,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:21,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123007693] [2020-12-23 09:50:21,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:21,919 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 09:50:21,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123007693] [2020-12-23 09:50:21,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:21,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 09:50:21,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569099505] [2020-12-23 09:50:21,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:50:21,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:21,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:50:21,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:50:21,922 INFO L87 Difference]: Start difference. First operand 4576 states and 6879 transitions. Second operand 8 states. [2020-12-23 09:50:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:22,663 INFO L93 Difference]: Finished difference Result 9634 states and 14240 transitions. [2020-12-23 09:50:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:50:22,664 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-12-23 09:50:22,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:22,716 INFO L225 Difference]: With dead ends: 9634 [2020-12-23 09:50:22,716 INFO L226 Difference]: Without dead ends: 9632 [2020-12-23 09:50:22,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:50:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9632 states. [2020-12-23 09:50:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9632 to 4960. [2020-12-23 09:50:23,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4960 states. [2020-12-23 09:50:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 7263 transitions. [2020-12-23 09:50:23,163 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 7263 transitions. Word has length 58 [2020-12-23 09:50:23,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:23,166 INFO L481 AbstractCegarLoop]: Abstraction has 4960 states and 7263 transitions. [2020-12-23 09:50:23,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:50:23,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 7263 transitions. [2020-12-23 09:50:23,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 09:50:23,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:23,167 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 09:50:23,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 09:50:23,168 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:23,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:23,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2082836158, now seen corresponding path program 1 times [2020-12-23 09:50:23,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:23,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343999368] [2020-12-23 09:50:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:23,250 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 09:50:23,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343999368] [2020-12-23 09:50:23,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:23,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:23,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782346068] [2020-12-23 09:50:23,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:23,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:23,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:23,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:23,253 INFO L87 Difference]: Start difference. First operand 4960 states and 7263 transitions. Second operand 3 states. [2020-12-23 09:50:23,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:23,692 INFO L93 Difference]: Finished difference Result 12022 states and 17635 transitions. [2020-12-23 09:50:23,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:23,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-23 09:50:23,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:23,742 INFO L225 Difference]: With dead ends: 12022 [2020-12-23 09:50:23,742 INFO L226 Difference]: Without dead ends: 7092 [2020-12-23 09:50:23,752 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 09:50:23,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2020-12-23 09:50:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 7034. [2020-12-23 09:50:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7034 states. [2020-12-23 09:50:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 10233 transitions. [2020-12-23 09:50:24,238 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 10233 transitions. Word has length 59 [2020-12-23 09:50:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:24,238 INFO L481 AbstractCegarLoop]: Abstraction has 7034 states and 10233 transitions. [2020-12-23 09:50:24,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 10233 transitions. [2020-12-23 09:50:24,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:24,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:24,251 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, 1] [2020-12-23 09:50:24,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 09:50:24,251 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:24,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:24,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1751499669, now seen corresponding path program 1 times [2020-12-23 09:50:24,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:24,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626891896] [2020-12-23 09:50:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:24,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626891896] [2020-12-23 09:50:24,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768970794] [2020-12-23 09:50:24,653 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 09:50:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:24,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 09:50:24,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:50:25,229 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 09:50:25,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:50:25,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-23 09:50:25,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434981164] [2020-12-23 09:50:25,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 09:50:25,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:25,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 09:50:25,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-12-23 09:50:25,233 INFO L87 Difference]: Start difference. First operand 7034 states and 10233 transitions. Second operand 12 states. [2020-12-23 09:50:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:31,436 INFO L93 Difference]: Finished difference Result 53516 states and 77163 transitions. [2020-12-23 09:50:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 09:50:31,437 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-12-23 09:50:31,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:31,554 INFO L225 Difference]: With dead ends: 53516 [2020-12-23 09:50:31,554 INFO L226 Difference]: Without dead ends: 46762 [2020-12-23 09:50:31,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=728, Invalid=3054, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 09:50:31,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46762 states. [2020-12-23 09:50:33,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46762 to 27022. [2020-12-23 09:50:33,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27022 states. [2020-12-23 09:50:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27022 states to 27022 states and 38871 transitions. [2020-12-23 09:50:34,105 INFO L78 Accepts]: Start accepts. Automaton has 27022 states and 38871 transitions. Word has length 83 [2020-12-23 09:50:34,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:34,105 INFO L481 AbstractCegarLoop]: Abstraction has 27022 states and 38871 transitions. [2020-12-23 09:50:34,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 09:50:34,106 INFO L276 IsEmpty]: Start isEmpty. Operand 27022 states and 38871 transitions. [2020-12-23 09:50:34,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:34,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:34,115 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:34,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 09:50:34,330 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:34,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:34,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1216959876, now seen corresponding path program 1 times [2020-12-23 09:50:34,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:34,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903614627] [2020-12-23 09:50:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:34,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903614627] [2020-12-23 09:50:34,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:34,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:34,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374612093] [2020-12-23 09:50:34,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:34,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:34,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:34,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:34,390 INFO L87 Difference]: Start difference. First operand 27022 states and 38871 transitions. Second operand 3 states. [2020-12-23 09:50:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:35,971 INFO L93 Difference]: Finished difference Result 52398 states and 75377 transitions. [2020-12-23 09:50:35,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:35,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-23 09:50:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:36,056 INFO L225 Difference]: With dead ends: 52398 [2020-12-23 09:50:36,056 INFO L226 Difference]: Without dead ends: 37234 [2020-12-23 09:50:36,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:36,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37234 states. [2020-12-23 09:50:38,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37234 to 34890. [2020-12-23 09:50:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34890 states. [2020-12-23 09:50:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34890 states to 34890 states and 49605 transitions. [2020-12-23 09:50:38,077 INFO L78 Accepts]: Start accepts. Automaton has 34890 states and 49605 transitions. Word has length 83 [2020-12-23 09:50:38,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:38,077 INFO L481 AbstractCegarLoop]: Abstraction has 34890 states and 49605 transitions. [2020-12-23 09:50:38,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:38,077 INFO L276 IsEmpty]: Start isEmpty. Operand 34890 states and 49605 transitions. [2020-12-23 09:50:38,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:38,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:38,089 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:38,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 09:50:38,089 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:38,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:38,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1156984558, now seen corresponding path program 1 times [2020-12-23 09:50:38,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:38,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848839421] [2020-12-23 09:50:38,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:50:38,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848839421] [2020-12-23 09:50:38,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:38,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:38,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821581628] [2020-12-23 09:50:38,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:38,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:38,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:38,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:38,186 INFO L87 Difference]: Start difference. First operand 34890 states and 49605 transitions. Second operand 6 states. [2020-12-23 09:50:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:41,203 INFO L93 Difference]: Finished difference Result 80458 states and 115254 transitions. [2020-12-23 09:50:41,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:41,203 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-23 09:50:41,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:41,329 INFO L225 Difference]: With dead ends: 80458 [2020-12-23 09:50:41,329 INFO L226 Difference]: Without dead ends: 65120 [2020-12-23 09:50:41,370 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 09:50:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65120 states. [2020-12-23 09:50:44,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65120 to 48690. [2020-12-23 09:50:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48690 states. [2020-12-23 09:50:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48690 states to 48690 states and 69199 transitions. [2020-12-23 09:50:44,739 INFO L78 Accepts]: Start accepts. Automaton has 48690 states and 69199 transitions. Word has length 83 [2020-12-23 09:50:44,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:44,740 INFO L481 AbstractCegarLoop]: Abstraction has 48690 states and 69199 transitions. [2020-12-23 09:50:44,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 48690 states and 69199 transitions. [2020-12-23 09:50:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:44,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:44,750 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:44,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 09:50:44,751 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:44,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:44,751 INFO L82 PathProgramCache]: Analyzing trace with hash 103872526, now seen corresponding path program 1 times [2020-12-23 09:50:44,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:44,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177635922] [2020-12-23 09:50:44,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:50:44,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177635922] [2020-12-23 09:50:44,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:44,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:50:44,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332599276] [2020-12-23 09:50:44,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:50:44,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:44,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:50:44,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:50:44,826 INFO L87 Difference]: Start difference. First operand 48690 states and 69199 transitions. Second operand 3 states. [2020-12-23 09:50:47,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:47,756 INFO L93 Difference]: Finished difference Result 78601 states and 111237 transitions. [2020-12-23 09:50:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:50:47,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-23 09:50:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:47,830 INFO L225 Difference]: With dead ends: 78601 [2020-12-23 09:50:47,830 INFO L226 Difference]: Without dead ends: 50714 [2020-12-23 09:50:47,856 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 09:50:47,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50714 states. [2020-12-23 09:50:50,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50714 to 48532. [2020-12-23 09:50:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48532 states. [2020-12-23 09:50:50,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48532 states to 48532 states and 67794 transitions. [2020-12-23 09:50:50,633 INFO L78 Accepts]: Start accepts. Automaton has 48532 states and 67794 transitions. Word has length 83 [2020-12-23 09:50:50,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:50,634 INFO L481 AbstractCegarLoop]: Abstraction has 48532 states and 67794 transitions. [2020-12-23 09:50:50,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:50:50,634 INFO L276 IsEmpty]: Start isEmpty. Operand 48532 states and 67794 transitions. [2020-12-23 09:50:50,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:50,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:50,645 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:50,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 09:50:50,645 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:50,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:50,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1847168790, now seen corresponding path program 1 times [2020-12-23 09:50:50,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:50,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309889103] [2020-12-23 09:50:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:50,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:50,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 09:50:50,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309889103] [2020-12-23 09:50:50,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:50,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:50,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012641100] [2020-12-23 09:50:50,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:50,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:50,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:50,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:50,749 INFO L87 Difference]: Start difference. First operand 48532 states and 67794 transitions. Second operand 6 states. [2020-12-23 09:50:54,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:50:54,520 INFO L93 Difference]: Finished difference Result 90213 states and 127312 transitions. [2020-12-23 09:50:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:50:54,520 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-23 09:50:54,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:50:54,604 INFO L225 Difference]: With dead ends: 90213 [2020-12-23 09:50:54,604 INFO L226 Difference]: Without dead ends: 78791 [2020-12-23 09:50:54,624 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 09:50:54,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78791 states. [2020-12-23 09:50:57,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78791 to 59428. [2020-12-23 09:50:57,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59428 states. [2020-12-23 09:50:57,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59428 states to 59428 states and 83148 transitions. [2020-12-23 09:50:57,938 INFO L78 Accepts]: Start accepts. Automaton has 59428 states and 83148 transitions. Word has length 83 [2020-12-23 09:50:57,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:50:57,939 INFO L481 AbstractCegarLoop]: Abstraction has 59428 states and 83148 transitions. [2020-12-23 09:50:57,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:50:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 59428 states and 83148 transitions. [2020-12-23 09:50:57,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 09:50:57,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:50:57,947 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:50:57,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 09:50:57,947 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:50:57,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:50:57,948 INFO L82 PathProgramCache]: Analyzing trace with hash 591755980, now seen corresponding path program 1 times [2020-12-23 09:50:57,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:50:57,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516829311] [2020-12-23 09:50:57,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:50:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:50:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 09:50:58,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516829311] [2020-12-23 09:50:58,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:50:58,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:50:58,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414163746] [2020-12-23 09:50:58,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:50:58,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:50:58,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:50:58,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:50:58,055 INFO L87 Difference]: Start difference. First operand 59428 states and 83148 transitions. Second operand 6 states. [2020-12-23 09:51:02,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:02,009 INFO L93 Difference]: Finished difference Result 93685 states and 132050 transitions. [2020-12-23 09:51:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:51:02,010 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-12-23 09:51:02,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:02,107 INFO L225 Difference]: With dead ends: 93685 [2020-12-23 09:51:02,107 INFO L226 Difference]: Without dead ends: 86075 [2020-12-23 09:51:02,125 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 09:51:02,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86075 states. [2020-12-23 09:51:05,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86075 to 66712. [2020-12-23 09:51:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66712 states. [2020-12-23 09:51:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66712 states to 66712 states and 93442 transitions. [2020-12-23 09:51:05,700 INFO L78 Accepts]: Start accepts. Automaton has 66712 states and 93442 transitions. Word has length 83 [2020-12-23 09:51:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:05,700 INFO L481 AbstractCegarLoop]: Abstraction has 66712 states and 93442 transitions. [2020-12-23 09:51:05,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:51:05,700 INFO L276 IsEmpty]: Start isEmpty. Operand 66712 states and 93442 transitions. [2020-12-23 09:51:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 09:51:05,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:05,709 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, 1] [2020-12-23 09:51:05,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 09:51:05,709 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:05,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:05,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1488535284, now seen corresponding path program 1 times [2020-12-23 09:51:05,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:05,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289933364] [2020-12-23 09:51:05,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:05,763 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 09:51:05,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289933364] [2020-12-23 09:51:05,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:51:05,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:51:05,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421319187] [2020-12-23 09:51:05,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:51:05,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:05,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:51:05,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:51:05,766 INFO L87 Difference]: Start difference. First operand 66712 states and 93442 transitions. Second operand 3 states. [2020-12-23 09:51:11,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:11,480 INFO L93 Difference]: Finished difference Result 183967 states and 256544 transitions. [2020-12-23 09:51:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:51:11,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-23 09:51:11,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:11,647 INFO L225 Difference]: With dead ends: 183967 [2020-12-23 09:51:11,647 INFO L226 Difference]: Without dead ends: 122108 [2020-12-23 09:51:11,691 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 09:51:11,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122108 states. [2020-12-23 09:51:18,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122108 to 121968. [2020-12-23 09:51:18,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121968 states. [2020-12-23 09:51:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121968 states to 121968 states and 168000 transitions. [2020-12-23 09:51:18,265 INFO L78 Accepts]: Start accepts. Automaton has 121968 states and 168000 transitions. Word has length 84 [2020-12-23 09:51:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:18,265 INFO L481 AbstractCegarLoop]: Abstraction has 121968 states and 168000 transitions. [2020-12-23 09:51:18,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:51:18,266 INFO L276 IsEmpty]: Start isEmpty. Operand 121968 states and 168000 transitions. [2020-12-23 09:51:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 09:51:18,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:18,278 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 09:51:18,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 09:51:18,279 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:18,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:18,279 INFO L82 PathProgramCache]: Analyzing trace with hash -663169506, now seen corresponding path program 1 times [2020-12-23 09:51:18,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:18,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119167135] [2020-12-23 09:51:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:18,644 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 09:51:18,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119167135] [2020-12-23 09:51:18,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:51:18,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:51:18,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313917661] [2020-12-23 09:51:18,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:51:18,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:18,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:51:18,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:51:18,651 INFO L87 Difference]: Start difference. First operand 121968 states and 168000 transitions. Second operand 6 states. [2020-12-23 09:51:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:51:31,488 INFO L93 Difference]: Finished difference Result 369605 states and 509741 transitions. [2020-12-23 09:51:31,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:51:31,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-12-23 09:51:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:51:32,126 INFO L225 Difference]: With dead ends: 369605 [2020-12-23 09:51:32,127 INFO L226 Difference]: Without dead ends: 247673 [2020-12-23 09:51:32,248 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 09:51:32,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247673 states. [2020-12-23 09:51:44,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247673 to 215556. [2020-12-23 09:51:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215556 states. [2020-12-23 09:51:45,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215556 states to 215556 states and 295084 transitions. [2020-12-23 09:51:45,376 INFO L78 Accepts]: Start accepts. Automaton has 215556 states and 295084 transitions. Word has length 84 [2020-12-23 09:51:45,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:51:45,376 INFO L481 AbstractCegarLoop]: Abstraction has 215556 states and 295084 transitions. [2020-12-23 09:51:45,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:51:45,376 INFO L276 IsEmpty]: Start isEmpty. Operand 215556 states and 295084 transitions. [2020-12-23 09:51:45,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 09:51:45,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:51:45,406 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 09:51:45,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 09:51:45,407 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:51:45,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:51:45,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1365416604, now seen corresponding path program 1 times [2020-12-23 09:51:45,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:51:45,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191871314] [2020-12-23 09:51:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:51:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:51:45,539 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 09:51:45,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191871314] [2020-12-23 09:51:45,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:51:45,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:51:45,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524591800] [2020-12-23 09:51:45,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:51:45,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:51:45,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:51:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:51:45,541 INFO L87 Difference]: Start difference. First operand 215556 states and 295084 transitions. Second operand 6 states. [2020-12-23 09:52:01,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:52:01,371 INFO L93 Difference]: Finished difference Result 329993 states and 455844 transitions. [2020-12-23 09:52:01,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:52:01,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-12-23 09:52:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:52:02,055 INFO L225 Difference]: With dead ends: 329993 [2020-12-23 09:52:02,055 INFO L226 Difference]: Without dead ends: 296997 [2020-12-23 09:52:02,168 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 09:52:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296997 states. [2020-12-23 09:52:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296997 to 243135. [2020-12-23 09:52:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243135 states. [2020-12-23 09:52:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243135 states to 243135 states and 332992 transitions. [2020-12-23 09:52:18,196 INFO L78 Accepts]: Start accepts. Automaton has 243135 states and 332992 transitions. Word has length 84 [2020-12-23 09:52:18,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:52:18,196 INFO L481 AbstractCegarLoop]: Abstraction has 243135 states and 332992 transitions. [2020-12-23 09:52:18,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:52:18,196 INFO L276 IsEmpty]: Start isEmpty. Operand 243135 states and 332992 transitions. [2020-12-23 09:52:18,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 09:52:18,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:52:18,218 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:52:18,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 09:52:18,219 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:52:18,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:52:18,219 INFO L82 PathProgramCache]: Analyzing trace with hash 335470307, now seen corresponding path program 1 times [2020-12-23 09:52:18,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:52:18,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658076327] [2020-12-23 09:52:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:52:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:52:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:52:18,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658076327] [2020-12-23 09:52:18,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:52:18,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:52:18,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839831190] [2020-12-23 09:52:18,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:52:18,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:52:18,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:52:18,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:52:18,294 INFO L87 Difference]: Start difference. First operand 243135 states and 332992 transitions. Second operand 3 states.