/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:47:48,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:47:48,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:47:48,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:47:48,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:47:48,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:47:48,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:47:48,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:47:48,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:47:48,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:47:48,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:47:48,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:47:48,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:47:48,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:47:48,899 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:47:48,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:47:48,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:47:48,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:47:48,905 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:47:48,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:47:48,909 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:47:48,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:47:48,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:47:48,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:47:48,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 19:47:48,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 19:47:48,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 19:47:48,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 19:47:48,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 19:47:48,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 19:47:48,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:47:48,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:47:48,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:47:48,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:47:48,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:47:48,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:47:48,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:47:48,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:47:48,927 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:47:48,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:47:48,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:47:48,931 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 19:47:48,993 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:47:48,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:47:49,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:47:49,000 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:47:49,000 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:47:49,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:47:49,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:47:49,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:47:49,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:47:49,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:47:49,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:47:49,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:47:49,004 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:47:49,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:47:49,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:47:49,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:47:49,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:47:49,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:47:49,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:47:49,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:47:49,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:47:49,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:47:49,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:47:49,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:47:49,007 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:47:49,007 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:47:49,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:47:49,457 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:47:49,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:47:49,462 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:47:49,463 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:47:49,464 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2021-01-06 19:47:49,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8b6795fc0/08951acd8b37417a9baeabc1424692ed/FLAG44c71271a [2021-01-06 19:47:50,128 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:47:50,128 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2021-01-06 19:47:50,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8b6795fc0/08951acd8b37417a9baeabc1424692ed/FLAG44c71271a [2021-01-06 19:47:50,483 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8b6795fc0/08951acd8b37417a9baeabc1424692ed [2021-01-06 19:47:50,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:47:50,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:47:50,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:47:50,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:47:50,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:47:50,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:47:50" (1/1) ... [2021-01-06 19:47:50,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cbd2abb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:50, skipping insertion in model container [2021-01-06 19:47:50,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:47:50" (1/1) ... [2021-01-06 19:47:50,506 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:47:50,533 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] [2021-01-06 19:47:50,749 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c[6080,6093] [2021-01-06 19:47:50,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:47:50,779 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m1~0,] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~m2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~m3~0,] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~0,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~tmp~1,] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] left hand side expression in assignment: lhs: VariableLHS[~r1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode2~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~id3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~st3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~send3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~mode3~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i2~0,] left hand side expression in assignment: lhs: VariableLHS[~p1_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p1_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p2_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_old~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~p3_new~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~c1~0,] [2021-01-06 19:47:50,876 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c[6080,6093] [2021-01-06 19:47:50,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:47:50,899 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:47:50,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:50 WrapperNode [2021-01-06 19:47:50,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:47:50,901 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:47:50,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:47:50,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:47:50,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:50" (1/1) ... [2021-01-06 19:47:50,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:50" (1/1) ... [2021-01-06 19:47:50,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:47:50,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:47:50,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:47:50,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:47:50,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:50" (1/1) ... [2021-01-06 19:47:50,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:50" (1/1) ... [2021-01-06 19:47:50,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:50" (1/1) ... [2021-01-06 19:47:50,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:50" (1/1) ... [2021-01-06 19:47:50,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:50" (1/1) ... [2021-01-06 19:47:50,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:50" (1/1) ... [2021-01-06 19:47:50,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:50" (1/1) ... [2021-01-06 19:47:50,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:47:50,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:47:50,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:47:50,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:47:51,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:47:51,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:47:51,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:47:51,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:47:51,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:47:51,802 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:47:51,803 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-01-06 19:47:51,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:47:51 BoogieIcfgContainer [2021-01-06 19:47:51,806 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:47:51,808 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:47:51,809 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:47:51,812 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:47:51,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:47:50" (1/3) ... [2021-01-06 19:47:51,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42417e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:47:51, skipping insertion in model container [2021-01-06 19:47:51,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:47:50" (2/3) ... [2021-01-06 19:47:51,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42417e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:47:51, skipping insertion in model container [2021-01-06 19:47:51,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:47:51" (3/3) ... [2021-01-06 19:47:51,820 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2021-01-06 19:47:51,827 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:47:51,832 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:47:51,874 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:47:51,901 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:47:51,902 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:47:51,902 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:47:51,902 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:47:51,902 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:47:51,902 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:47:51,902 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:47:51,903 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:47:51,919 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2021-01-06 19:47:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 19:47:51,934 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:51,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:51,936 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:51,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:51,942 INFO L82 PathProgramCache]: Analyzing trace with hash -980022832, now seen corresponding path program 1 times [2021-01-06 19:47:51,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:51,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057911287] [2021-01-06 19:47:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:52,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057911287] [2021-01-06 19:47:52,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:52,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 19:47:52,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511299114] [2021-01-06 19:47:52,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 19:47:52,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:52,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 19:47:52,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 19:47:52,214 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2021-01-06 19:47:52,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:52,238 INFO L93 Difference]: Finished difference Result 101 states and 165 transitions. [2021-01-06 19:47:52,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 19:47:52,240 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2021-01-06 19:47:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:52,252 INFO L225 Difference]: With dead ends: 101 [2021-01-06 19:47:52,252 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 19:47:52,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 19:47:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 19:47:52,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-01-06 19:47:52,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 19:47:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 96 transitions. [2021-01-06 19:47:52,302 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 96 transitions. Word has length 25 [2021-01-06 19:47:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:52,302 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 96 transitions. [2021-01-06 19:47:52,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 19:47:52,303 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 96 transitions. [2021-01-06 19:47:52,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 19:47:52,304 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:52,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:52,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:47:52,305 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:52,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:52,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1797671282, now seen corresponding path program 1 times [2021-01-06 19:47:52,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:52,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882211292] [2021-01-06 19:47:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:52,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882211292] [2021-01-06 19:47:52,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:52,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:47:52,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884428536] [2021-01-06 19:47:52,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:47:52,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:52,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:47:52,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:52,401 INFO L87 Difference]: Start difference. First operand 59 states and 96 transitions. Second operand 5 states. [2021-01-06 19:47:52,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:52,474 INFO L93 Difference]: Finished difference Result 100 states and 158 transitions. [2021-01-06 19:47:52,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:47:52,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2021-01-06 19:47:52,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:52,476 INFO L225 Difference]: With dead ends: 100 [2021-01-06 19:47:52,476 INFO L226 Difference]: Without dead ends: 59 [2021-01-06 19:47:52,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:47:52,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-01-06 19:47:52,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-01-06 19:47:52,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 19:47:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 80 transitions. [2021-01-06 19:47:52,487 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 80 transitions. Word has length 25 [2021-01-06 19:47:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:52,487 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 80 transitions. [2021-01-06 19:47:52,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:47:52,487 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 80 transitions. [2021-01-06 19:47:52,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:47:52,489 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:52,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:52,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 19:47:52,489 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:52,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:52,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1903157419, now seen corresponding path program 1 times [2021-01-06 19:47:52,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:52,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614431072] [2021-01-06 19:47:52,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:52,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614431072] [2021-01-06 19:47:52,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:52,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:47:52,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703870199] [2021-01-06 19:47:52,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:47:52,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:52,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:47:52,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:52,652 INFO L87 Difference]: Start difference. First operand 59 states and 80 transitions. Second operand 3 states. [2021-01-06 19:47:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:52,681 INFO L93 Difference]: Finished difference Result 127 states and 186 transitions. [2021-01-06 19:47:52,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:47:52,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2021-01-06 19:47:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:52,684 INFO L225 Difference]: With dead ends: 127 [2021-01-06 19:47:52,684 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 19:47:52,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 19:47:52,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2021-01-06 19:47:52,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 19:47:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 126 transitions. [2021-01-06 19:47:52,713 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 126 transitions. Word has length 40 [2021-01-06 19:47:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:52,714 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 126 transitions. [2021-01-06 19:47:52,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:47:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 126 transitions. [2021-01-06 19:47:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:47:52,716 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:52,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:52,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 19:47:52,717 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:52,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:52,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2054016735, now seen corresponding path program 1 times [2021-01-06 19:47:52,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:52,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013372016] [2021-01-06 19:47:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:52,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013372016] [2021-01-06 19:47:52,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:52,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:47:52,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909433794] [2021-01-06 19:47:52,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:47:52,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:52,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:47:52,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:52,834 INFO L87 Difference]: Start difference. First operand 88 states and 126 transitions. Second operand 3 states. [2021-01-06 19:47:52,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:52,876 INFO L93 Difference]: Finished difference Result 208 states and 314 transitions. [2021-01-06 19:47:52,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:47:52,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2021-01-06 19:47:52,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:52,881 INFO L225 Difference]: With dead ends: 208 [2021-01-06 19:47:52,882 INFO L226 Difference]: Without dead ends: 142 [2021-01-06 19:47:52,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:52,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-01-06 19:47:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2021-01-06 19:47:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2021-01-06 19:47:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 207 transitions. [2021-01-06 19:47:52,901 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 207 transitions. Word has length 40 [2021-01-06 19:47:52,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:52,902 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 207 transitions. [2021-01-06 19:47:52,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:47:52,902 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 207 transitions. [2021-01-06 19:47:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:47:52,903 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:52,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:52,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 19:47:52,904 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:52,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:52,905 INFO L82 PathProgramCache]: Analyzing trace with hash -836031337, now seen corresponding path program 1 times [2021-01-06 19:47:52,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:52,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38239080] [2021-01-06 19:47:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:53,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38239080] [2021-01-06 19:47:53,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:53,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:47:53,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718783125] [2021-01-06 19:47:53,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:47:53,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:47:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:53,023 INFO L87 Difference]: Start difference. First operand 140 states and 207 transitions. Second operand 5 states. [2021-01-06 19:47:53,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:53,245 INFO L93 Difference]: Finished difference Result 730 states and 1132 transitions. [2021-01-06 19:47:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:47:53,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2021-01-06 19:47:53,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:53,275 INFO L225 Difference]: With dead ends: 730 [2021-01-06 19:47:53,275 INFO L226 Difference]: Without dead ends: 612 [2021-01-06 19:47:53,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:47:53,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-01-06 19:47:53,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 256. [2021-01-06 19:47:53,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2021-01-06 19:47:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 383 transitions. [2021-01-06 19:47:53,350 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 383 transitions. Word has length 40 [2021-01-06 19:47:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:53,350 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 383 transitions. [2021-01-06 19:47:53,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:47:53,351 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 383 transitions. [2021-01-06 19:47:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 19:47:53,352 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:53,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:53,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 19:47:53,353 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:53,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:53,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1682931033, now seen corresponding path program 1 times [2021-01-06 19:47:53,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:53,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824733759] [2021-01-06 19:47:53,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:53,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824733759] [2021-01-06 19:47:53,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:53,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:47:53,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897761293] [2021-01-06 19:47:53,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:47:53,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:53,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:47:53,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:53,431 INFO L87 Difference]: Start difference. First operand 256 states and 383 transitions. Second operand 3 states. [2021-01-06 19:47:53,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:53,514 INFO L93 Difference]: Finished difference Result 680 states and 1029 transitions. [2021-01-06 19:47:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:47:53,515 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2021-01-06 19:47:53,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:53,518 INFO L225 Difference]: With dead ends: 680 [2021-01-06 19:47:53,518 INFO L226 Difference]: Without dead ends: 446 [2021-01-06 19:47:53,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:53,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-01-06 19:47:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2021-01-06 19:47:53,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2021-01-06 19:47:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 639 transitions. [2021-01-06 19:47:53,583 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 639 transitions. Word has length 42 [2021-01-06 19:47:53,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:53,585 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 639 transitions. [2021-01-06 19:47:53,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:47:53,586 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 639 transitions. [2021-01-06 19:47:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 19:47:53,595 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:53,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:53,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 19:47:53,596 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:53,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:53,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1616437521, now seen corresponding path program 1 times [2021-01-06 19:47:53,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:53,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987935676] [2021-01-06 19:47:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:53,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987935676] [2021-01-06 19:47:53,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:53,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:47:53,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087638450] [2021-01-06 19:47:53,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:47:53,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:53,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:47:53,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:53,840 INFO L87 Difference]: Start difference. First operand 436 states and 639 transitions. Second operand 5 states. [2021-01-06 19:47:53,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:53,929 INFO L93 Difference]: Finished difference Result 1058 states and 1570 transitions. [2021-01-06 19:47:53,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:47:53,929 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2021-01-06 19:47:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:53,933 INFO L225 Difference]: With dead ends: 1058 [2021-01-06 19:47:53,933 INFO L226 Difference]: Without dead ends: 644 [2021-01-06 19:47:53,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-01-06 19:47:53,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 436. [2021-01-06 19:47:53,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2021-01-06 19:47:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 631 transitions. [2021-01-06 19:47:53,963 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 631 transitions. Word has length 42 [2021-01-06 19:47:53,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:53,963 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 631 transitions. [2021-01-06 19:47:53,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:47:53,963 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 631 transitions. [2021-01-06 19:47:53,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-01-06 19:47:53,964 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:53,964 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:53,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 19:47:53,965 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:53,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1015321205, now seen corresponding path program 1 times [2021-01-06 19:47:53,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:53,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129359913] [2021-01-06 19:47:53,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:54,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129359913] [2021-01-06 19:47:54,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:54,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-01-06 19:47:54,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037728440] [2021-01-06 19:47:54,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:47:54,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:54,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:47:54,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:47:54,093 INFO L87 Difference]: Start difference. First operand 436 states and 631 transitions. Second operand 8 states. [2021-01-06 19:47:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:54,310 INFO L93 Difference]: Finished difference Result 762 states and 1095 transitions. [2021-01-06 19:47:54,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 19:47:54,311 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2021-01-06 19:47:54,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:54,315 INFO L225 Difference]: With dead ends: 762 [2021-01-06 19:47:54,315 INFO L226 Difference]: Without dead ends: 760 [2021-01-06 19:47:54,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-01-06 19:47:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-01-06 19:47:54,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 460. [2021-01-06 19:47:54,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2021-01-06 19:47:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 651 transitions. [2021-01-06 19:47:54,378 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 651 transitions. Word has length 43 [2021-01-06 19:47:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:54,378 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 651 transitions. [2021-01-06 19:47:54,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:47:54,378 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 651 transitions. [2021-01-06 19:47:54,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 19:47:54,379 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:54,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:54,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 19:47:54,380 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:54,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1022832678, now seen corresponding path program 1 times [2021-01-06 19:47:54,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:54,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194575208] [2021-01-06 19:47:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:54,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:54,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194575208] [2021-01-06 19:47:54,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:54,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:47:54,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331608014] [2021-01-06 19:47:54,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:47:54,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:54,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:47:54,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:54,418 INFO L87 Difference]: Start difference. First operand 460 states and 651 transitions. Second operand 3 states. [2021-01-06 19:47:54,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:54,479 INFO L93 Difference]: Finished difference Result 915 states and 1313 transitions. [2021-01-06 19:47:54,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:47:54,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2021-01-06 19:47:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:54,483 INFO L225 Difference]: With dead ends: 915 [2021-01-06 19:47:54,483 INFO L226 Difference]: Without dead ends: 656 [2021-01-06 19:47:54,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:54,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-01-06 19:47:54,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 654. [2021-01-06 19:47:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2021-01-06 19:47:54,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 921 transitions. [2021-01-06 19:47:54,539 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 921 transitions. Word has length 44 [2021-01-06 19:47:54,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:54,539 INFO L481 AbstractCegarLoop]: Abstraction has 654 states and 921 transitions. [2021-01-06 19:47:54,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:47:54,540 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 921 transitions. [2021-01-06 19:47:54,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 19:47:54,541 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:54,541 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:54,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-06 19:47:54,541 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:54,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:54,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1850444022, now seen corresponding path program 1 times [2021-01-06 19:47:54,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:54,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854343167] [2021-01-06 19:47:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-01-06 19:47:54,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854343167] [2021-01-06 19:47:54,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:54,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:47:54,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736573559] [2021-01-06 19:47:54,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:47:54,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:54,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:47:54,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:54,608 INFO L87 Difference]: Start difference. First operand 654 states and 921 transitions. Second operand 5 states. [2021-01-06 19:47:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:54,834 INFO L93 Difference]: Finished difference Result 2682 states and 3797 transitions. [2021-01-06 19:47:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:47:54,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2021-01-06 19:47:54,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:54,850 INFO L225 Difference]: With dead ends: 2682 [2021-01-06 19:47:54,851 INFO L226 Difference]: Without dead ends: 2052 [2021-01-06 19:47:54,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:47:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-01-06 19:47:54,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1282. [2021-01-06 19:47:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2021-01-06 19:47:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1805 transitions. [2021-01-06 19:47:54,977 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1805 transitions. Word has length 62 [2021-01-06 19:47:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:54,977 INFO L481 AbstractCegarLoop]: Abstraction has 1282 states and 1805 transitions. [2021-01-06 19:47:54,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:47:54,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1805 transitions. [2021-01-06 19:47:54,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-01-06 19:47:54,979 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:54,979 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:54,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 19:47:54,979 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:54,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:54,980 INFO L82 PathProgramCache]: Analyzing trace with hash 675740458, now seen corresponding path program 1 times [2021-01-06 19:47:54,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:54,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20172143] [2021-01-06 19:47:54,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 19:47:55,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20172143] [2021-01-06 19:47:55,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:55,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:47:55,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139210681] [2021-01-06 19:47:55,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:47:55,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:55,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:47:55,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:55,056 INFO L87 Difference]: Start difference. First operand 1282 states and 1805 transitions. Second operand 5 states. [2021-01-06 19:47:55,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:55,311 INFO L93 Difference]: Finished difference Result 3310 states and 4681 transitions. [2021-01-06 19:47:55,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:47:55,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2021-01-06 19:47:55,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:55,325 INFO L225 Difference]: With dead ends: 3310 [2021-01-06 19:47:55,325 INFO L226 Difference]: Without dead ends: 2680 [2021-01-06 19:47:55,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:55,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-01-06 19:47:55,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2226. [2021-01-06 19:47:55,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2226 states. [2021-01-06 19:47:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3121 transitions. [2021-01-06 19:47:55,528 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3121 transitions. Word has length 62 [2021-01-06 19:47:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:55,529 INFO L481 AbstractCegarLoop]: Abstraction has 2226 states and 3121 transitions. [2021-01-06 19:47:55,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:47:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3121 transitions. [2021-01-06 19:47:55,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:47:55,530 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:55,531 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] [2021-01-06 19:47:55,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 19:47:55,531 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:55,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1509451614, now seen corresponding path program 1 times [2021-01-06 19:47:55,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:55,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779911029] [2021-01-06 19:47:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:55,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779911029] [2021-01-06 19:47:55,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:55,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:47:55,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784444522] [2021-01-06 19:47:55,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:47:55,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:55,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:47:55,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:55,589 INFO L87 Difference]: Start difference. First operand 2226 states and 3121 transitions. Second operand 3 states. [2021-01-06 19:47:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:55,731 INFO L93 Difference]: Finished difference Result 3819 states and 5388 transitions. [2021-01-06 19:47:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:47:55,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2021-01-06 19:47:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:55,741 INFO L225 Difference]: With dead ends: 3819 [2021-01-06 19:47:55,741 INFO L226 Difference]: Without dead ends: 1617 [2021-01-06 19:47:55,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:47:55,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-01-06 19:47:55,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1615. [2021-01-06 19:47:55,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1615 states. [2021-01-06 19:47:55,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2261 transitions. [2021-01-06 19:47:55,928 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2261 transitions. Word has length 64 [2021-01-06 19:47:55,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:55,929 INFO L481 AbstractCegarLoop]: Abstraction has 1615 states and 2261 transitions. [2021-01-06 19:47:55,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:47:55,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2261 transitions. [2021-01-06 19:47:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:47:55,930 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:55,931 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:47:55,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-01-06 19:47:55,931 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:55,932 INFO L82 PathProgramCache]: Analyzing trace with hash -533719953, now seen corresponding path program 1 times [2021-01-06 19:47:55,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:55,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815941702] [2021-01-06 19:47:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:47:56,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815941702] [2021-01-06 19:47:56,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:47:56,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:47:56,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972551346] [2021-01-06 19:47:56,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:47:56,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:56,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:47:56,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:56,049 INFO L87 Difference]: Start difference. First operand 1615 states and 2261 transitions. Second operand 5 states. [2021-01-06 19:47:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:56,252 INFO L93 Difference]: Finished difference Result 2967 states and 4185 transitions. [2021-01-06 19:47:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:47:56,253 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2021-01-06 19:47:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:56,265 INFO L225 Difference]: With dead ends: 2967 [2021-01-06 19:47:56,265 INFO L226 Difference]: Without dead ends: 2517 [2021-01-06 19:47:56,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:47:56,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2021-01-06 19:47:56,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 2063. [2021-01-06 19:47:56,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2063 states. [2021-01-06 19:47:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 2893 transitions. [2021-01-06 19:47:56,447 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 2893 transitions. Word has length 64 [2021-01-06 19:47:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:47:56,448 INFO L481 AbstractCegarLoop]: Abstraction has 2063 states and 2893 transitions. [2021-01-06 19:47:56,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:47:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 2893 transitions. [2021-01-06 19:47:56,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 19:47:56,451 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:47:56,451 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] [2021-01-06 19:47:56,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-01-06 19:47:56,451 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:47:56,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:47:56,452 INFO L82 PathProgramCache]: Analyzing trace with hash 453585990, now seen corresponding path program 1 times [2021-01-06 19:47:56,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:47:56,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246945568] [2021-01-06 19:47:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:47:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:47:56,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246945568] [2021-01-06 19:47:56,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096133859] [2021-01-06 19:47:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:47:56,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:47:56,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 19:47:56,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:47:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:47:57,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:47:57,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2021-01-06 19:47:57,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435573326] [2021-01-06 19:47:57,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 19:47:57,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:47:57,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 19:47:57,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:47:57,172 INFO L87 Difference]: Start difference. First operand 2063 states and 2893 transitions. Second operand 12 states. [2021-01-06 19:47:59,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:47:59,904 INFO L93 Difference]: Finished difference Result 11357 states and 15649 transitions. [2021-01-06 19:47:59,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 19:47:59,905 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2021-01-06 19:47:59,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:47:59,946 INFO L225 Difference]: With dead ends: 11357 [2021-01-06 19:47:59,946 INFO L226 Difference]: Without dead ends: 9339 [2021-01-06 19:47:59,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=399, Invalid=1581, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 19:47:59,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9339 states. [2021-01-06 19:48:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9339 to 6075. [2021-01-06 19:48:00,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6075 states. [2021-01-06 19:48:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6075 states to 6075 states and 8170 transitions. [2021-01-06 19:48:00,577 INFO L78 Accepts]: Start accepts. Automaton has 6075 states and 8170 transitions. Word has length 65 [2021-01-06 19:48:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:00,577 INFO L481 AbstractCegarLoop]: Abstraction has 6075 states and 8170 transitions. [2021-01-06 19:48:00,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 19:48:00,577 INFO L276 IsEmpty]: Start isEmpty. Operand 6075 states and 8170 transitions. [2021-01-06 19:48:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 19:48:00,578 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:00,579 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] [2021-01-06 19:48:00,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 19:48:00,793 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:00,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:00,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1141993671, now seen corresponding path program 1 times [2021-01-06 19:48:00,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:00,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810468095] [2021-01-06 19:48:00,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:00,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:00,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810468095] [2021-01-06 19:48:00,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998807458] [2021-01-06 19:48:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:48:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:01,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 19:48:01,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:48:01,243 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 19:48:01,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:01,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:48:01,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 19:48:01,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267824535] [2021-01-06 19:48:01,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:48:01,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:01,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:48:01,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:48:01,597 INFO L87 Difference]: Start difference. First operand 6075 states and 8170 transitions. Second operand 17 states. [2021-01-06 19:48:04,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:04,944 INFO L93 Difference]: Finished difference Result 29946 states and 40228 transitions. [2021-01-06 19:48:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 19:48:04,944 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2021-01-06 19:48:04,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:05,018 INFO L225 Difference]: With dead ends: 29946 [2021-01-06 19:48:05,019 INFO L226 Difference]: Without dead ends: 25035 [2021-01-06 19:48:05,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 19:48:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25035 states. [2021-01-06 19:48:06,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25035 to 13748. [2021-01-06 19:48:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13748 states. [2021-01-06 19:48:06,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13748 states to 13748 states and 18456 transitions. [2021-01-06 19:48:06,567 INFO L78 Accepts]: Start accepts. Automaton has 13748 states and 18456 transitions. Word has length 66 [2021-01-06 19:48:06,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:06,568 INFO L481 AbstractCegarLoop]: Abstraction has 13748 states and 18456 transitions. [2021-01-06 19:48:06,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:48:06,568 INFO L276 IsEmpty]: Start isEmpty. Operand 13748 states and 18456 transitions. [2021-01-06 19:48:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 19:48:06,570 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:06,570 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:48:06,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 19:48:06,785 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:06,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:06,786 INFO L82 PathProgramCache]: Analyzing trace with hash -879979399, now seen corresponding path program 1 times [2021-01-06 19:48:06,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:06,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388491299] [2021-01-06 19:48:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:06,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:06,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388491299] [2021-01-06 19:48:06,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933737400] [2021-01-06 19:48:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:48:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:07,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 19:48:07,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:48:07,224 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 19:48:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:07,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:48:07,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-01-06 19:48:07,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566956496] [2021-01-06 19:48:07,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:48:07,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:07,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:48:07,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:48:07,596 INFO L87 Difference]: Start difference. First operand 13748 states and 18456 transitions. Second operand 17 states. [2021-01-06 19:48:09,379 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-01-06 19:48:14,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:14,362 INFO L93 Difference]: Finished difference Result 75187 states and 101112 transitions. [2021-01-06 19:48:14,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 19:48:14,365 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2021-01-06 19:48:14,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:14,500 INFO L225 Difference]: With dead ends: 75187 [2021-01-06 19:48:14,500 INFO L226 Difference]: Without dead ends: 63757 [2021-01-06 19:48:14,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=596, Invalid=1660, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 19:48:14,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63757 states. [2021-01-06 19:48:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63757 to 31799. [2021-01-06 19:48:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31799 states. [2021-01-06 19:48:18,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31799 states to 31799 states and 42724 transitions. [2021-01-06 19:48:18,315 INFO L78 Accepts]: Start accepts. Automaton has 31799 states and 42724 transitions. Word has length 66 [2021-01-06 19:48:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:18,315 INFO L481 AbstractCegarLoop]: Abstraction has 31799 states and 42724 transitions. [2021-01-06 19:48:18,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:48:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 31799 states and 42724 transitions. [2021-01-06 19:48:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 19:48:18,317 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:18,318 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:48:18,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 19:48:18,533 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:18,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:18,535 INFO L82 PathProgramCache]: Analyzing trace with hash 338005999, now seen corresponding path program 1 times [2021-01-06 19:48:18,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:18,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165104157] [2021-01-06 19:48:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:18,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165104157] [2021-01-06 19:48:18,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:18,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:48:18,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257032210] [2021-01-06 19:48:18,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:48:18,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:18,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:48:18,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:18,582 INFO L87 Difference]: Start difference. First operand 31799 states and 42724 transitions. Second operand 3 states. [2021-01-06 19:48:20,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:20,382 INFO L93 Difference]: Finished difference Result 47017 states and 63333 transitions. [2021-01-06 19:48:20,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:48:20,382 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2021-01-06 19:48:20,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:20,423 INFO L225 Difference]: With dead ends: 47017 [2021-01-06 19:48:20,423 INFO L226 Difference]: Without dead ends: 18505 [2021-01-06 19:48:20,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:20,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18505 states. [2021-01-06 19:48:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18505 to 18269. [2021-01-06 19:48:22,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18269 states. [2021-01-06 19:48:22,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18269 states to 18269 states and 23886 transitions. [2021-01-06 19:48:22,295 INFO L78 Accepts]: Start accepts. Automaton has 18269 states and 23886 transitions. Word has length 66 [2021-01-06 19:48:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:22,295 INFO L481 AbstractCegarLoop]: Abstraction has 18269 states and 23886 transitions. [2021-01-06 19:48:22,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:48:22,296 INFO L276 IsEmpty]: Start isEmpty. Operand 18269 states and 23886 transitions. [2021-01-06 19:48:22,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 19:48:22,299 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:22,299 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:48:22,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-01-06 19:48:22,300 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:22,300 INFO L82 PathProgramCache]: Analyzing trace with hash -909501617, now seen corresponding path program 1 times [2021-01-06 19:48:22,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:22,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307396664] [2021-01-06 19:48:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:22,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307396664] [2021-01-06 19:48:22,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:22,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 19:48:22,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109519617] [2021-01-06 19:48:22,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 19:48:22,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:22,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 19:48:22,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:22,342 INFO L87 Difference]: Start difference. First operand 18269 states and 23886 transitions. Second operand 3 states. [2021-01-06 19:48:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:23,419 INFO L93 Difference]: Finished difference Result 28171 states and 37017 transitions. [2021-01-06 19:48:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 19:48:23,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2021-01-06 19:48:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:23,435 INFO L225 Difference]: With dead ends: 28171 [2021-01-06 19:48:23,435 INFO L226 Difference]: Without dead ends: 12159 [2021-01-06 19:48:23,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 19:48:23,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12159 states. [2021-01-06 19:48:24,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12159 to 12157. [2021-01-06 19:48:24,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12157 states. [2021-01-06 19:48:24,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12157 states to 12157 states and 15509 transitions. [2021-01-06 19:48:24,492 INFO L78 Accepts]: Start accepts. Automaton has 12157 states and 15509 transitions. Word has length 66 [2021-01-06 19:48:24,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:24,492 INFO L481 AbstractCegarLoop]: Abstraction has 12157 states and 15509 transitions. [2021-01-06 19:48:24,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 19:48:24,492 INFO L276 IsEmpty]: Start isEmpty. Operand 12157 states and 15509 transitions. [2021-01-06 19:48:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 19:48:24,494 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:24,495 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:48:24,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-01-06 19:48:24,495 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:24,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2060627063, now seen corresponding path program 1 times [2021-01-06 19:48:24,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:24,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671843216] [2021-01-06 19:48:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 19:48:24,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671843216] [2021-01-06 19:48:24,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:24,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:48:24,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571807640] [2021-01-06 19:48:24,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:48:24,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:24,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:48:24,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:48:24,569 INFO L87 Difference]: Start difference. First operand 12157 states and 15509 transitions. Second operand 6 states. [2021-01-06 19:48:25,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:25,486 INFO L93 Difference]: Finished difference Result 18368 states and 23564 transitions. [2021-01-06 19:48:25,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:48:25,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2021-01-06 19:48:25,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:25,494 INFO L225 Difference]: With dead ends: 18368 [2021-01-06 19:48:25,494 INFO L226 Difference]: Without dead ends: 6316 [2021-01-06 19:48:25,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:48:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6316 states. [2021-01-06 19:48:26,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6316 to 6316. [2021-01-06 19:48:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6316 states. [2021-01-06 19:48:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6316 states to 6316 states and 7993 transitions. [2021-01-06 19:48:26,235 INFO L78 Accepts]: Start accepts. Automaton has 6316 states and 7993 transitions. Word has length 66 [2021-01-06 19:48:26,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:26,235 INFO L481 AbstractCegarLoop]: Abstraction has 6316 states and 7993 transitions. [2021-01-06 19:48:26,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:48:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 6316 states and 7993 transitions. [2021-01-06 19:48:26,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 19:48:26,237 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:26,237 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:48:26,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-01-06 19:48:26,237 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:26,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:26,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1909338697, now seen corresponding path program 1 times [2021-01-06 19:48:26,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:26,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905179488] [2021-01-06 19:48:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:48:26,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905179488] [2021-01-06 19:48:26,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:26,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 19:48:26,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280687173] [2021-01-06 19:48:26,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 19:48:26,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:26,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 19:48:26,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:48:26,309 INFO L87 Difference]: Start difference. First operand 6316 states and 7993 transitions. Second operand 7 states. [2021-01-06 19:48:26,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:26,895 INFO L93 Difference]: Finished difference Result 12868 states and 16391 transitions. [2021-01-06 19:48:26,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:48:26,895 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2021-01-06 19:48:26,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:26,902 INFO L225 Difference]: With dead ends: 12868 [2021-01-06 19:48:26,902 INFO L226 Difference]: Without dead ends: 6669 [2021-01-06 19:48:26,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:48:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6669 states. [2021-01-06 19:48:27,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6669 to 6667. [2021-01-06 19:48:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6667 states. [2021-01-06 19:48:27,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6667 states to 6667 states and 8431 transitions. [2021-01-06 19:48:27,509 INFO L78 Accepts]: Start accepts. Automaton has 6667 states and 8431 transitions. Word has length 66 [2021-01-06 19:48:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:27,510 INFO L481 AbstractCegarLoop]: Abstraction has 6667 states and 8431 transitions. [2021-01-06 19:48:27,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 19:48:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 6667 states and 8431 transitions. [2021-01-06 19:48:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 19:48:27,511 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:27,511 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:48:27,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-01-06 19:48:27,511 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:27,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:27,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1136949911, now seen corresponding path program 1 times [2021-01-06 19:48:27,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:27,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601288172] [2021-01-06 19:48:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 19:48:27,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601288172] [2021-01-06 19:48:27,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:48:27,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:48:27,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752597999] [2021-01-06 19:48:27,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 19:48:27,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:27,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 19:48:27,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:48:27,567 INFO L87 Difference]: Start difference. First operand 6667 states and 8431 transitions. Second operand 6 states. [2021-01-06 19:48:28,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:28,630 INFO L93 Difference]: Finished difference Result 16657 states and 21290 transitions. [2021-01-06 19:48:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:48:28,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2021-01-06 19:48:28,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:28,640 INFO L225 Difference]: With dead ends: 16657 [2021-01-06 19:48:28,640 INFO L226 Difference]: Without dead ends: 10047 [2021-01-06 19:48:28,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:48:28,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10047 states. [2021-01-06 19:48:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10047 to 9217. [2021-01-06 19:48:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9217 states. [2021-01-06 19:48:29,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9217 states to 9217 states and 11677 transitions. [2021-01-06 19:48:29,375 INFO L78 Accepts]: Start accepts. Automaton has 9217 states and 11677 transitions. Word has length 66 [2021-01-06 19:48:29,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:29,376 INFO L481 AbstractCegarLoop]: Abstraction has 9217 states and 11677 transitions. [2021-01-06 19:48:29,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 19:48:29,376 INFO L276 IsEmpty]: Start isEmpty. Operand 9217 states and 11677 transitions. [2021-01-06 19:48:29,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 19:48:29,377 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:29,377 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:48:29,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-01-06 19:48:29,377 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:29,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:29,377 INFO L82 PathProgramCache]: Analyzing trace with hash 72303667, now seen corresponding path program 1 times [2021-01-06 19:48:29,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:29,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990245344] [2021-01-06 19:48:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:29,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:30,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990245344] [2021-01-06 19:48:30,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414526625] [2021-01-06 19:48:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:48:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:30,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 19:48:30,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:48:30,678 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 19:48:31,034 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2021-01-06 19:48:31,692 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:31,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:48:31,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-01-06 19:48:31,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668097956] [2021-01-06 19:48:31,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 19:48:31,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:31,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 19:48:31,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 19:48:31,694 INFO L87 Difference]: Start difference. First operand 9217 states and 11677 transitions. Second operand 33 states. [2021-01-06 19:48:31,991 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-01-06 19:48:33,017 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-01-06 19:48:33,207 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-01-06 19:48:33,467 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-01-06 19:48:33,865 WARN L197 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2021-01-06 19:48:34,342 WARN L197 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2021-01-06 19:48:34,816 WARN L197 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 101 [2021-01-06 19:48:35,161 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2021-01-06 19:48:35,495 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2021-01-06 19:48:35,827 WARN L197 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-01-06 19:48:36,184 WARN L197 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2021-01-06 19:48:36,447 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2021-01-06 19:48:36,754 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-01-06 19:48:36,952 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-01-06 19:48:37,407 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2021-01-06 19:48:37,690 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2021-01-06 19:48:38,396 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-01-06 19:48:38,664 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-01-06 19:48:38,906 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2021-01-06 19:48:39,376 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-01-06 19:48:39,815 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-01-06 19:48:40,241 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2021-01-06 19:48:40,540 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-01-06 19:48:40,910 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-01-06 19:48:41,302 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2021-01-06 19:48:41,652 WARN L197 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2021-01-06 19:48:41,891 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2021-01-06 19:48:42,087 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-01-06 19:48:42,630 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 112 [2021-01-06 19:48:42,955 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2021-01-06 19:48:45,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:48:45,475 INFO L93 Difference]: Finished difference Result 29338 states and 38131 transitions. [2021-01-06 19:48:45,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 19:48:45,478 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 67 [2021-01-06 19:48:45,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:48:45,507 INFO L225 Difference]: With dead ends: 29338 [2021-01-06 19:48:45,507 INFO L226 Difference]: Without dead ends: 24561 [2021-01-06 19:48:45,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=955, Invalid=4745, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 19:48:45,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24561 states. [2021-01-06 19:48:46,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24561 to 8269. [2021-01-06 19:48:46,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8269 states. [2021-01-06 19:48:46,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8269 states to 8269 states and 10534 transitions. [2021-01-06 19:48:46,552 INFO L78 Accepts]: Start accepts. Automaton has 8269 states and 10534 transitions. Word has length 67 [2021-01-06 19:48:46,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:48:46,552 INFO L481 AbstractCegarLoop]: Abstraction has 8269 states and 10534 transitions. [2021-01-06 19:48:46,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 19:48:46,552 INFO L276 IsEmpty]: Start isEmpty. Operand 8269 states and 10534 transitions. [2021-01-06 19:48:46,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 19:48:46,553 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:48:46,554 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:48:46,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:48:46,760 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:48:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:48:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1790008711, now seen corresponding path program 1 times [2021-01-06 19:48:46,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:48:46,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23829249] [2021-01-06 19:48:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:48:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:47,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:47,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23829249] [2021-01-06 19:48:47,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001328625] [2021-01-06 19:48:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:48:47,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:48:47,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 19:48:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:48:48,183 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 19:48:48,707 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 34 [2021-01-06 19:48:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:48:49,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:48:49,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-01-06 19:48:49,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839445096] [2021-01-06 19:48:49,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 19:48:49,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:48:49,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 19:48:49,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 19:48:49,269 INFO L87 Difference]: Start difference. First operand 8269 states and 10534 transitions. Second operand 33 states. [2021-01-06 19:48:49,614 WARN L197 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2021-01-06 19:48:50,483 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-01-06 19:48:50,911 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-01-06 19:48:51,466 WARN L197 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2021-01-06 19:48:51,964 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2021-01-06 19:48:52,574 WARN L197 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-01-06 19:48:53,200 WARN L197 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2021-01-06 19:48:53,578 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-01-06 19:48:53,909 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2021-01-06 19:48:54,255 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2021-01-06 19:48:54,572 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-01-06 19:48:54,930 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2021-01-06 19:48:55,196 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-01-06 19:48:55,438 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-01-06 19:48:55,790 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2021-01-06 19:48:56,022 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2021-01-06 19:48:56,586 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-01-06 19:48:56,772 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-01-06 19:48:57,038 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-01-06 19:48:57,269 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-01-06 19:48:58,010 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-01-06 19:48:58,565 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2021-01-06 19:48:58,747 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-01-06 19:48:59,400 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2021-01-06 19:48:59,755 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-01-06 19:49:00,003 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-01-06 19:49:00,467 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2021-01-06 19:49:00,698 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-01-06 19:49:01,333 WARN L197 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-01-06 19:49:01,850 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2021-01-06 19:49:02,661 WARN L197 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2021-01-06 19:49:02,850 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-01-06 19:49:03,416 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-01-06 19:49:03,668 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-01-06 19:49:03,889 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-01-06 19:49:04,169 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2021-01-06 19:49:04,481 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-01-06 19:49:04,720 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-01-06 19:49:05,185 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-01-06 19:49:06,283 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-01-06 19:49:06,806 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2021-01-06 19:49:07,364 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-01-06 19:49:07,705 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-01-06 19:49:07,997 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-01-06 19:49:08,370 WARN L197 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2021-01-06 19:49:08,640 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-01-06 19:49:09,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:09,758 INFO L93 Difference]: Finished difference Result 22171 states and 28463 transitions. [2021-01-06 19:49:09,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 19:49:09,759 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 67 [2021-01-06 19:49:09,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:09,777 INFO L225 Difference]: With dead ends: 22171 [2021-01-06 19:49:09,777 INFO L226 Difference]: Without dead ends: 17546 [2021-01-06 19:49:09,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=1626, Invalid=7494, Unknown=0, NotChecked=0, Total=9120 [2021-01-06 19:49:09,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17546 states. [2021-01-06 19:49:10,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17546 to 7688. [2021-01-06 19:49:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7688 states. [2021-01-06 19:49:10,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 9866 transitions. [2021-01-06 19:49:10,766 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 9866 transitions. Word has length 67 [2021-01-06 19:49:10,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:10,766 INFO L481 AbstractCegarLoop]: Abstraction has 7688 states and 9866 transitions. [2021-01-06 19:49:10,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 19:49:10,766 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 9866 transitions. [2021-01-06 19:49:10,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 19:49:10,767 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:10,767 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] [2021-01-06 19:49:10,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 19:49:10,981 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:10,982 INFO L82 PathProgramCache]: Analyzing trace with hash -316809972, now seen corresponding path program 1 times [2021-01-06 19:49:10,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:10,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652063443] [2021-01-06 19:49:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:11,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652063443] [2021-01-06 19:49:11,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592123069] [2021-01-06 19:49:11,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:49:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:11,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 19:49:11,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:49:12,018 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 19:49:12,305 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 31 [2021-01-06 19:49:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:12,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:49:12,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-01-06 19:49:12,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893472008] [2021-01-06 19:49:12,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 19:49:12,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:12,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 19:49:12,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-01-06 19:49:12,729 INFO L87 Difference]: Start difference. First operand 7688 states and 9866 transitions. Second operand 23 states. [2021-01-06 19:49:13,268 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2021-01-06 19:49:13,517 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-01-06 19:49:13,768 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-01-06 19:49:14,032 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-01-06 19:49:14,217 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-01-06 19:49:14,462 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-01-06 19:49:15,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:15,441 INFO L93 Difference]: Finished difference Result 10016 states and 12930 transitions. [2021-01-06 19:49:15,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 19:49:15,442 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2021-01-06 19:49:15,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:15,448 INFO L225 Difference]: With dead ends: 10016 [2021-01-06 19:49:15,448 INFO L226 Difference]: Without dead ends: 5717 [2021-01-06 19:49:15,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 19:49:15,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5717 states. [2021-01-06 19:49:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5717 to 4699. [2021-01-06 19:49:16,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4699 states. [2021-01-06 19:49:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4699 states to 4699 states and 6098 transitions. [2021-01-06 19:49:16,032 INFO L78 Accepts]: Start accepts. Automaton has 4699 states and 6098 transitions. Word has length 69 [2021-01-06 19:49:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:16,032 INFO L481 AbstractCegarLoop]: Abstraction has 4699 states and 6098 transitions. [2021-01-06 19:49:16,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 19:49:16,033 INFO L276 IsEmpty]: Start isEmpty. Operand 4699 states and 6098 transitions. [2021-01-06 19:49:16,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 19:49:16,035 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:16,035 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:49:16,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:49:16,236 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:16,237 INFO L82 PathProgramCache]: Analyzing trace with hash 805682706, now seen corresponding path program 1 times [2021-01-06 19:49:16,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:16,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698353656] [2021-01-06 19:49:16,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:16,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698353656] [2021-01-06 19:49:16,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994244740] [2021-01-06 19:49:16,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:49:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:16,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 19:49:16,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:49:17,109 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 12 proven. 67 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 19:49:17,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:49:17,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 17 [2021-01-06 19:49:17,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953352721] [2021-01-06 19:49:17,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:49:17,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:49:17,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:49:17,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:49:17,112 INFO L87 Difference]: Start difference. First operand 4699 states and 6098 transitions. Second operand 17 states. [2021-01-06 19:49:18,256 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-01-06 19:49:18,453 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-01-06 19:49:18,607 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-01-06 19:49:18,942 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-01-06 19:49:19,102 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-01-06 19:49:19,270 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-01-06 19:49:19,540 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-01-06 19:49:19,799 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-01-06 19:49:19,975 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-01-06 19:49:20,171 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-01-06 19:49:20,321 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-01-06 19:49:20,488 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-01-06 19:49:20,657 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-01-06 19:49:21,355 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-01-06 19:49:21,569 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2021-01-06 19:49:21,758 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-01-06 19:49:21,946 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2021-01-06 19:49:23,703 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-01-06 19:49:23,885 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2021-01-06 19:49:24,066 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-01-06 19:49:24,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:49:24,779 INFO L93 Difference]: Finished difference Result 15471 states and 19894 transitions. [2021-01-06 19:49:24,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 19:49:24,780 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 110 [2021-01-06 19:49:24,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:49:24,794 INFO L225 Difference]: With dead ends: 15471 [2021-01-06 19:49:24,795 INFO L226 Difference]: Without dead ends: 11121 [2021-01-06 19:49:24,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=500, Invalid=2256, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 19:49:24,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11121 states. [2021-01-06 19:49:26,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11121 to 8459. [2021-01-06 19:49:26,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8459 states. [2021-01-06 19:49:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8459 states to 8459 states and 10370 transitions. [2021-01-06 19:49:26,057 INFO L78 Accepts]: Start accepts. Automaton has 8459 states and 10370 transitions. Word has length 110 [2021-01-06 19:49:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:49:26,057 INFO L481 AbstractCegarLoop]: Abstraction has 8459 states and 10370 transitions. [2021-01-06 19:49:26,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:49:26,057 INFO L276 IsEmpty]: Start isEmpty. Operand 8459 states and 10370 transitions. [2021-01-06 19:49:26,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 19:49:26,060 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:49:26,060 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:49:26,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 19:49:26,275 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:49:26,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:49:26,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1445084205, now seen corresponding path program 1 times [2021-01-06 19:49:26,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:49:26,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800172611] [2021-01-06 19:49:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:49:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:49:26,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800172611] [2021-01-06 19:49:26,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526697211] [2021-01-06 19:49:26,721 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:49:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:49:26,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 19:49:26,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:49:27,517 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2021-01-06 19:49:27,678 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:28,042 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:28,966 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:30,188 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:31,993 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:35,836 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:35,870 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 19:49:37,904 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 19:49:53,797 WARN L197 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 458 DAG size of output: 398 [2021-01-06 19:50:20,728 WARN L197 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 398