/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-dcfa08f [2020-12-23 09:54:12,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:54:12,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:54:13,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:54:13,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:54:13,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:54:13,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:54:13,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:54:13,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:54:13,048 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:54:13,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:54:13,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:54:13,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:54:13,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:54:13,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:54:13,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:54:13,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:54:13,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:54:13,078 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:54:13,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:54:13,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:54:13,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:54:13,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:54:13,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:54:13,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 09:54:13,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 09:54:13,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 09:54:13,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 09:54:13,122 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 09:54:13,123 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 09:54:13,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:54:13,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:54:13,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:54:13,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:54:13,127 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:54:13,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:54:13,128 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:54:13,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:54:13,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:54:13,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:54:13,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:54:13,133 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 09:54:13,184 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:54:13,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:54:13,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:54:13,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:54:13,190 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:54:13,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:54:13,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:54:13,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:54:13,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:54:13,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:54:13,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:54:13,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:54:13,193 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:54:13,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:54:13,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:54:13,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:54:13,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:54:13,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:54:13,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:54:13,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:54:13,195 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:54:13,195 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:54:13,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:54:13,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:54:13,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:54:13,196 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:54:13,660 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:54:13,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:54:13,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:54:13,696 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:54:13,696 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:54:13,697 INFO L432 ainManager$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 [2020-12-23 09:54:13,815 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/df4eea23d/687567053ce343d7b167b2c0b66e4241/FLAG0bb175d0f [2020-12-23 09:54:14,478 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:54:14,479 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2020-12-23 09:54:14,494 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/df4eea23d/687567053ce343d7b167b2c0b66e4241/FLAG0bb175d0f [2020-12-23 09:54:14,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/df4eea23d/687567053ce343d7b167b2c0b66e4241 [2020-12-23 09:54:14,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:54:14,839 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:54:14,844 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:54:14,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:54:14,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:54:14,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:54:14" (1/1) ... [2020-12-23 09:54:14,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72a151e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:14, skipping insertion in model container [2020-12-23 09:54:14,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:54:14" (1/1) ... [2020-12-23 09:54:14,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:54:14,934 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,] [2020-12-23 09:54:15,260 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] [2020-12-23 09:54:15,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:54:15,278 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,] [2020-12-23 09:54:15,327 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] [2020-12-23 09:54:15,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:54:15,349 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:54:15,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:15 WrapperNode [2020-12-23 09:54:15,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:54:15,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:54:15,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:54:15,351 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:54:15,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:15" (1/1) ... [2020-12-23 09:54:15,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:15" (1/1) ... [2020-12-23 09:54:15,403 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:54:15,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:54:15,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:54:15,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:54:15,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:15" (1/1) ... [2020-12-23 09:54:15,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:15" (1/1) ... [2020-12-23 09:54:15,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:15" (1/1) ... [2020-12-23 09:54:15,419 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:15" (1/1) ... [2020-12-23 09:54:15,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:15" (1/1) ... [2020-12-23 09:54:15,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:15" (1/1) ... [2020-12-23 09:54:15,434 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:15" (1/1) ... [2020-12-23 09:54:15,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:54:15,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:54:15,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:54:15,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:54:15,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:54:15,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:54:15,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:54:15,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:54:15,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:54:16,151 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:54:16,152 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2020-12-23 09:54:16,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:54:16 BoogieIcfgContainer [2020-12-23 09:54:16,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:54:16,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:54:16,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:54:16,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:54:16,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:54:14" (1/3) ... [2020-12-23 09:54:16,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256af0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:54:16, skipping insertion in model container [2020-12-23 09:54:16,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:54:15" (2/3) ... [2020-12-23 09:54:16,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@256af0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:54:16, skipping insertion in model container [2020-12-23 09:54:16,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:54:16" (3/3) ... [2020-12-23 09:54:16,169 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.UNBOUNDED.pals.c [2020-12-23 09:54:16,176 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:54:16,181 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:54:16,201 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:54:16,230 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:54:16,230 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:54:16,231 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:54:16,231 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:54:16,231 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:54:16,231 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:54:16,231 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:54:16,231 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:54:16,249 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-12-23 09:54:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 09:54:16,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:16,257 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] [2020-12-23 09:54:16,257 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:16,264 INFO L82 PathProgramCache]: Analyzing trace with hash -980022832, now seen corresponding path program 1 times [2020-12-23 09:54:16,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:16,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892364498] [2020-12-23 09:54:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:16,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:16,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892364498] [2020-12-23 09:54:16,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:16,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 09:54:16,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928605067] [2020-12-23 09:54:16,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 09:54:16,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:16,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 09:54:16,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 09:54:16,618 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2020-12-23 09:54:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:16,666 INFO L93 Difference]: Finished difference Result 101 states and 165 transitions. [2020-12-23 09:54:16,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 09:54:16,668 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2020-12-23 09:54:16,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:16,688 INFO L225 Difference]: With dead ends: 101 [2020-12-23 09:54:16,689 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 09:54:16,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 09:54:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 09:54:16,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-23 09:54:16,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 09:54:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 96 transitions. [2020-12-23 09:54:16,749 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 96 transitions. Word has length 25 [2020-12-23 09:54:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:16,749 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 96 transitions. [2020-12-23 09:54:16,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 09:54:16,750 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 96 transitions. [2020-12-23 09:54:16,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 09:54:16,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:16,751 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] [2020-12-23 09:54:16,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:54:16,752 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:16,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:16,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1797671282, now seen corresponding path program 1 times [2020-12-23 09:54:16,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:16,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697533003] [2020-12-23 09:54:16,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:16,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:16,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697533003] [2020-12-23 09:54:16,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:16,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:16,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198310498] [2020-12-23 09:54:16,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:16,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:16,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:16,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:16,909 INFO L87 Difference]: Start difference. First operand 59 states and 96 transitions. Second operand 5 states. [2020-12-23 09:54:17,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:17,003 INFO L93 Difference]: Finished difference Result 100 states and 158 transitions. [2020-12-23 09:54:17,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:54:17,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-12-23 09:54:17,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:17,005 INFO L225 Difference]: With dead ends: 100 [2020-12-23 09:54:17,005 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 09:54:17,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:54:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 09:54:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-23 09:54:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 09:54:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 80 transitions. [2020-12-23 09:54:17,015 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 80 transitions. Word has length 25 [2020-12-23 09:54:17,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:17,015 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 80 transitions. [2020-12-23 09:54:17,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 80 transitions. [2020-12-23 09:54:17,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:54:17,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:17,018 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] [2020-12-23 09:54:17,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 09:54:17,018 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:17,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:17,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1903157419, now seen corresponding path program 1 times [2020-12-23 09:54:17,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:17,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543125162] [2020-12-23 09:54:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:17,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543125162] [2020-12-23 09:54:17,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:17,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:17,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027043564] [2020-12-23 09:54:17,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:17,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:17,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:17,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:17,133 INFO L87 Difference]: Start difference. First operand 59 states and 80 transitions. Second operand 3 states. [2020-12-23 09:54:17,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:17,199 INFO L93 Difference]: Finished difference Result 127 states and 186 transitions. [2020-12-23 09:54:17,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:17,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-23 09:54:17,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:17,204 INFO L225 Difference]: With dead ends: 127 [2020-12-23 09:54:17,204 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 09:54:17,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 09:54:17,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-12-23 09:54:17,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 09:54:17,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 126 transitions. [2020-12-23 09:54:17,236 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 126 transitions. Word has length 40 [2020-12-23 09:54:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:17,236 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 126 transitions. [2020-12-23 09:54:17,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:17,237 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 126 transitions. [2020-12-23 09:54:17,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:54:17,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:17,240 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] [2020-12-23 09:54:17,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 09:54:17,241 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:17,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:17,242 INFO L82 PathProgramCache]: Analyzing trace with hash -2054016735, now seen corresponding path program 1 times [2020-12-23 09:54:17,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:17,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963552346] [2020-12-23 09:54:17,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:17,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963552346] [2020-12-23 09:54:17,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:17,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:17,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245711600] [2020-12-23 09:54:17,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:17,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:17,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:17,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:17,348 INFO L87 Difference]: Start difference. First operand 88 states and 126 transitions. Second operand 3 states. [2020-12-23 09:54:17,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:17,384 INFO L93 Difference]: Finished difference Result 208 states and 314 transitions. [2020-12-23 09:54:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:17,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-23 09:54:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:17,387 INFO L225 Difference]: With dead ends: 208 [2020-12-23 09:54:17,388 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 09:54:17,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:17,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 09:54:17,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2020-12-23 09:54:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-12-23 09:54:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 207 transitions. [2020-12-23 09:54:17,409 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 207 transitions. Word has length 40 [2020-12-23 09:54:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:17,410 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 207 transitions. [2020-12-23 09:54:17,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:17,410 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 207 transitions. [2020-12-23 09:54:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:54:17,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:17,412 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] [2020-12-23 09:54:17,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 09:54:17,413 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:17,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:17,414 INFO L82 PathProgramCache]: Analyzing trace with hash -836031337, now seen corresponding path program 1 times [2020-12-23 09:54:17,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:17,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192090758] [2020-12-23 09:54:17,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:17,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192090758] [2020-12-23 09:54:17,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:17,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:17,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166638233] [2020-12-23 09:54:17,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:17,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:17,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:17,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:17,599 INFO L87 Difference]: Start difference. First operand 140 states and 207 transitions. Second operand 5 states. [2020-12-23 09:54:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:17,865 INFO L93 Difference]: Finished difference Result 730 states and 1132 transitions. [2020-12-23 09:54:17,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:54:17,869 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-23 09:54:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:17,881 INFO L225 Difference]: With dead ends: 730 [2020-12-23 09:54:17,881 INFO L226 Difference]: Without dead ends: 612 [2020-12-23 09:54:17,884 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 [2020-12-23 09:54:17,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-12-23 09:54:17,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 256. [2020-12-23 09:54:17,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-12-23 09:54:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 383 transitions. [2020-12-23 09:54:17,953 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 383 transitions. Word has length 40 [2020-12-23 09:54:17,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:17,954 INFO L481 AbstractCegarLoop]: Abstraction has 256 states and 383 transitions. [2020-12-23 09:54:17,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:17,954 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 383 transitions. [2020-12-23 09:54:17,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 09:54:17,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:17,956 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:17,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 09:54:17,956 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:17,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1682931033, now seen corresponding path program 1 times [2020-12-23 09:54:17,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:17,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930504302] [2020-12-23 09:54:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:18,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930504302] [2020-12-23 09:54:18,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:18,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:18,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294117908] [2020-12-23 09:54:18,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:18,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:18,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:18,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:18,031 INFO L87 Difference]: Start difference. First operand 256 states and 383 transitions. Second operand 3 states. [2020-12-23 09:54:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:18,079 INFO L93 Difference]: Finished difference Result 680 states and 1029 transitions. [2020-12-23 09:54:18,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:18,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-12-23 09:54:18,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:18,083 INFO L225 Difference]: With dead ends: 680 [2020-12-23 09:54:18,084 INFO L226 Difference]: Without dead ends: 446 [2020-12-23 09:54:18,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:18,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-12-23 09:54:18,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 436. [2020-12-23 09:54:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-12-23 09:54:18,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 639 transitions. [2020-12-23 09:54:18,126 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 639 transitions. Word has length 42 [2020-12-23 09:54:18,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:18,128 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 639 transitions. [2020-12-23 09:54:18,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:18,129 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 639 transitions. [2020-12-23 09:54:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 09:54:18,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:18,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:18,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 09:54:18,138 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:18,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:18,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1616437521, now seen corresponding path program 1 times [2020-12-23 09:54:18,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:18,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847495408] [2020-12-23 09:54:18,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:18,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847495408] [2020-12-23 09:54:18,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:18,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:18,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759147704] [2020-12-23 09:54:18,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:18,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:18,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:18,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:18,297 INFO L87 Difference]: Start difference. First operand 436 states and 639 transitions. Second operand 5 states. [2020-12-23 09:54:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:18,399 INFO L93 Difference]: Finished difference Result 1058 states and 1570 transitions. [2020-12-23 09:54:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:54:18,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-23 09:54:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:18,403 INFO L225 Difference]: With dead ends: 1058 [2020-12-23 09:54:18,404 INFO L226 Difference]: Without dead ends: 644 [2020-12-23 09:54:18,405 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 [2020-12-23 09:54:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2020-12-23 09:54:18,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 436. [2020-12-23 09:54:18,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-12-23 09:54:18,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 631 transitions. [2020-12-23 09:54:18,440 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 631 transitions. Word has length 42 [2020-12-23 09:54:18,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:18,441 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 631 transitions. [2020-12-23 09:54:18,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 631 transitions. [2020-12-23 09:54:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 09:54:18,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:18,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:18,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 09:54:18,443 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:18,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:18,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1015321205, now seen corresponding path program 1 times [2020-12-23 09:54:18,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:18,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966382532] [2020-12-23 09:54:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:18,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966382532] [2020-12-23 09:54:18,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:18,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 09:54:18,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108509375] [2020-12-23 09:54:18,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:54:18,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:18,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:54:18,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:54:18,563 INFO L87 Difference]: Start difference. First operand 436 states and 631 transitions. Second operand 8 states. [2020-12-23 09:54:18,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:18,766 INFO L93 Difference]: Finished difference Result 762 states and 1095 transitions. [2020-12-23 09:54:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:54:18,767 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-12-23 09:54:18,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:18,772 INFO L225 Difference]: With dead ends: 762 [2020-12-23 09:54:18,772 INFO L226 Difference]: Without dead ends: 760 [2020-12-23 09:54:18,773 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 [2020-12-23 09:54:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2020-12-23 09:54:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 460. [2020-12-23 09:54:18,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-12-23 09:54:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 651 transitions. [2020-12-23 09:54:18,810 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 651 transitions. Word has length 43 [2020-12-23 09:54:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:18,810 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 651 transitions. [2020-12-23 09:54:18,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:54:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 651 transitions. [2020-12-23 09:54:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 09:54:18,811 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:18,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:54:18,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 09:54:18,812 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1022832678, now seen corresponding path program 1 times [2020-12-23 09:54:18,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:18,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246212309] [2020-12-23 09:54:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:18,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246212309] [2020-12-23 09:54:18,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:18,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:18,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606821106] [2020-12-23 09:54:18,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:18,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:18,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:18,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:18,858 INFO L87 Difference]: Start difference. First operand 460 states and 651 transitions. Second operand 3 states. [2020-12-23 09:54:18,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:18,913 INFO L93 Difference]: Finished difference Result 915 states and 1313 transitions. [2020-12-23 09:54:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:18,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-12-23 09:54:18,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:18,917 INFO L225 Difference]: With dead ends: 915 [2020-12-23 09:54:18,918 INFO L226 Difference]: Without dead ends: 656 [2020-12-23 09:54:18,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:18,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-12-23 09:54:18,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 654. [2020-12-23 09:54:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2020-12-23 09:54:18,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 921 transitions. [2020-12-23 09:54:18,978 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 921 transitions. Word has length 44 [2020-12-23 09:54:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:18,978 INFO L481 AbstractCegarLoop]: Abstraction has 654 states and 921 transitions. [2020-12-23 09:54:18,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 921 transitions. [2020-12-23 09:54:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 09:54:18,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:18,980 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] [2020-12-23 09:54:18,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 09:54:18,980 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:18,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:18,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1850444022, now seen corresponding path program 1 times [2020-12-23 09:54:18,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:18,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950743353] [2020-12-23 09:54:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 09:54:19,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950743353] [2020-12-23 09:54:19,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:19,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:19,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691497801] [2020-12-23 09:54:19,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:19,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:19,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:19,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:19,058 INFO L87 Difference]: Start difference. First operand 654 states and 921 transitions. Second operand 5 states. [2020-12-23 09:54:19,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:19,258 INFO L93 Difference]: Finished difference Result 2682 states and 3797 transitions. [2020-12-23 09:54:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:54:19,258 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-23 09:54:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:19,270 INFO L225 Difference]: With dead ends: 2682 [2020-12-23 09:54:19,270 INFO L226 Difference]: Without dead ends: 2052 [2020-12-23 09:54:19,272 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 [2020-12-23 09:54:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2020-12-23 09:54:19,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1282. [2020-12-23 09:54:19,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2020-12-23 09:54:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1805 transitions. [2020-12-23 09:54:19,399 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1805 transitions. Word has length 62 [2020-12-23 09:54:19,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:19,401 INFO L481 AbstractCegarLoop]: Abstraction has 1282 states and 1805 transitions. [2020-12-23 09:54:19,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:19,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1805 transitions. [2020-12-23 09:54:19,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 09:54:19,402 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:19,403 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] [2020-12-23 09:54:19,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 09:54:19,403 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:19,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:19,404 INFO L82 PathProgramCache]: Analyzing trace with hash 675740458, now seen corresponding path program 1 times [2020-12-23 09:54:19,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:19,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603911994] [2020-12-23 09:54:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:19,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 09:54:19,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603911994] [2020-12-23 09:54:19,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:19,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:19,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137496261] [2020-12-23 09:54:19,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:19,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:19,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:19,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:19,525 INFO L87 Difference]: Start difference. First operand 1282 states and 1805 transitions. Second operand 5 states. [2020-12-23 09:54:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:19,777 INFO L93 Difference]: Finished difference Result 3310 states and 4681 transitions. [2020-12-23 09:54:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:54:19,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-12-23 09:54:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:19,791 INFO L225 Difference]: With dead ends: 3310 [2020-12-23 09:54:19,791 INFO L226 Difference]: Without dead ends: 2680 [2020-12-23 09:54:19,794 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 [2020-12-23 09:54:19,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2020-12-23 09:54:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2226. [2020-12-23 09:54:19,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2226 states. [2020-12-23 09:54:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 3121 transitions. [2020-12-23 09:54:20,000 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 3121 transitions. Word has length 62 [2020-12-23 09:54:20,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:20,000 INFO L481 AbstractCegarLoop]: Abstraction has 2226 states and 3121 transitions. [2020-12-23 09:54:20,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:20,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 3121 transitions. [2020-12-23 09:54:20,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 09:54:20,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:20,002 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] [2020-12-23 09:54:20,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 09:54:20,003 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:20,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:20,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1509451614, now seen corresponding path program 1 times [2020-12-23 09:54:20,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:20,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502041644] [2020-12-23 09:54:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:20,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502041644] [2020-12-23 09:54:20,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:20,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:20,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349512901] [2020-12-23 09:54:20,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:20,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:20,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:20,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:20,079 INFO L87 Difference]: Start difference. First operand 2226 states and 3121 transitions. Second operand 3 states. [2020-12-23 09:54:20,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:20,244 INFO L93 Difference]: Finished difference Result 3819 states and 5388 transitions. [2020-12-23 09:54:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:20,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-23 09:54:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:20,259 INFO L225 Difference]: With dead ends: 3819 [2020-12-23 09:54:20,259 INFO L226 Difference]: Without dead ends: 1617 [2020-12-23 09:54:20,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:20,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2020-12-23 09:54:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1615. [2020-12-23 09:54:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1615 states. [2020-12-23 09:54:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2261 transitions. [2020-12-23 09:54:20,418 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2261 transitions. Word has length 64 [2020-12-23 09:54:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:20,418 INFO L481 AbstractCegarLoop]: Abstraction has 1615 states and 2261 transitions. [2020-12-23 09:54:20,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:20,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2261 transitions. [2020-12-23 09:54:20,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 09:54:20,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:20,420 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] [2020-12-23 09:54:20,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 09:54:20,420 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:20,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:20,421 INFO L82 PathProgramCache]: Analyzing trace with hash -533719953, now seen corresponding path program 1 times [2020-12-23 09:54:20,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:20,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987742897] [2020-12-23 09:54:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:54:20,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987742897] [2020-12-23 09:54:20,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:20,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:20,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163004516] [2020-12-23 09:54:20,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:54:20,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:20,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:54:20,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:54:20,514 INFO L87 Difference]: Start difference. First operand 1615 states and 2261 transitions. Second operand 5 states. [2020-12-23 09:54:20,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:20,763 INFO L93 Difference]: Finished difference Result 2967 states and 4185 transitions. [2020-12-23 09:54:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:54:20,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-12-23 09:54:20,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:20,776 INFO L225 Difference]: With dead ends: 2967 [2020-12-23 09:54:20,776 INFO L226 Difference]: Without dead ends: 2517 [2020-12-23 09:54:20,781 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 [2020-12-23 09:54:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2020-12-23 09:54:20,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 2063. [2020-12-23 09:54:20,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2063 states. [2020-12-23 09:54:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2063 states to 2063 states and 2893 transitions. [2020-12-23 09:54:20,946 INFO L78 Accepts]: Start accepts. Automaton has 2063 states and 2893 transitions. Word has length 64 [2020-12-23 09:54:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:20,947 INFO L481 AbstractCegarLoop]: Abstraction has 2063 states and 2893 transitions. [2020-12-23 09:54:20,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:54:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2063 states and 2893 transitions. [2020-12-23 09:54:20,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 09:54:20,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:20,956 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] [2020-12-23 09:54:20,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 09:54:20,957 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:20,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:20,957 INFO L82 PathProgramCache]: Analyzing trace with hash 453585990, now seen corresponding path program 1 times [2020-12-23 09:54:20,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:20,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834888633] [2020-12-23 09:54:20,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:21,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:21,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:21,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834888633] [2020-12-23 09:54:21,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734377955] [2020-12-23 09:54:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:54:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:21,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 09:54:21,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:54:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:54:21,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:54:21,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 12 [2020-12-23 09:54:21,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111643861] [2020-12-23 09:54:21,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 09:54:21,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:21,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 09:54:21,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-12-23 09:54:21,664 INFO L87 Difference]: Start difference. First operand 2063 states and 2893 transitions. Second operand 12 states. [2020-12-23 09:54:24,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:24,300 INFO L93 Difference]: Finished difference Result 11357 states and 15649 transitions. [2020-12-23 09:54:24,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 09:54:24,301 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-12-23 09:54:24,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:24,345 INFO L225 Difference]: With dead ends: 11357 [2020-12-23 09:54:24,345 INFO L226 Difference]: Without dead ends: 9339 [2020-12-23 09:54:24,351 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 [2020-12-23 09:54:24,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9339 states. [2020-12-23 09:54:24,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9339 to 6075. [2020-12-23 09:54:24,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6075 states. [2020-12-23 09:54:25,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6075 states to 6075 states and 8170 transitions. [2020-12-23 09:54:25,015 INFO L78 Accepts]: Start accepts. Automaton has 6075 states and 8170 transitions. Word has length 65 [2020-12-23 09:54:25,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:25,015 INFO L481 AbstractCegarLoop]: Abstraction has 6075 states and 8170 transitions. [2020-12-23 09:54:25,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 09:54:25,015 INFO L276 IsEmpty]: Start isEmpty. Operand 6075 states and 8170 transitions. [2020-12-23 09:54:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 09:54:25,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:25,017 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] [2020-12-23 09:54:25,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 09:54:25,233 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:25,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:25,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1141993671, now seen corresponding path program 1 times [2020-12-23 09:54:25,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:25,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024446255] [2020-12-23 09:54:25,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:25,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024446255] [2020-12-23 09:54:25,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346365609] [2020-12-23 09:54:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:54:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:25,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 09:54:25,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:54:25,780 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:54:26,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:26,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:54:26,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 09:54:26,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475633084] [2020-12-23 09:54:26,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:54:26,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:26,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:54:26,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:54:26,122 INFO L87 Difference]: Start difference. First operand 6075 states and 8170 transitions. Second operand 17 states. [2020-12-23 09:54:29,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:29,412 INFO L93 Difference]: Finished difference Result 29946 states and 40228 transitions. [2020-12-23 09:54:29,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 09:54:29,412 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-23 09:54:29,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:29,493 INFO L225 Difference]: With dead ends: 29946 [2020-12-23 09:54:29,493 INFO L226 Difference]: Without dead ends: 25035 [2020-12-23 09:54:29,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=358, Invalid=1124, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 09:54:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25035 states. [2020-12-23 09:54:31,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25035 to 13748. [2020-12-23 09:54:31,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13748 states. [2020-12-23 09:54:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13748 states to 13748 states and 18456 transitions. [2020-12-23 09:54:31,077 INFO L78 Accepts]: Start accepts. Automaton has 13748 states and 18456 transitions. Word has length 66 [2020-12-23 09:54:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:31,077 INFO L481 AbstractCegarLoop]: Abstraction has 13748 states and 18456 transitions. [2020-12-23 09:54:31,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:54:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 13748 states and 18456 transitions. [2020-12-23 09:54:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 09:54:31,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:31,079 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] [2020-12-23 09:54:31,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 09:54:31,295 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:31,297 INFO L82 PathProgramCache]: Analyzing trace with hash -879979399, now seen corresponding path program 1 times [2020-12-23 09:54:31,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:31,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942690781] [2020-12-23 09:54:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:31,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942690781] [2020-12-23 09:54:31,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709905114] [2020-12-23 09:54:31,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:54:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:31,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 09:54:31,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:54:31,851 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 09:54:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:32,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:54:32,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-23 09:54:32,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270989262] [2020-12-23 09:54:32,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:54:32,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:32,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:54:32,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:54:32,241 INFO L87 Difference]: Start difference. First operand 13748 states and 18456 transitions. Second operand 17 states. [2020-12-23 09:54:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:39,413 INFO L93 Difference]: Finished difference Result 75187 states and 101112 transitions. [2020-12-23 09:54:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 09:54:39,414 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2020-12-23 09:54:39,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:39,581 INFO L225 Difference]: With dead ends: 75187 [2020-12-23 09:54:39,581 INFO L226 Difference]: Without dead ends: 63757 [2020-12-23 09:54:39,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=596, Invalid=1660, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 09:54:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63757 states. [2020-12-23 09:54:43,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63757 to 31799. [2020-12-23 09:54:43,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31799 states. [2020-12-23 09:54:43,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31799 states to 31799 states and 42724 transitions. [2020-12-23 09:54:43,101 INFO L78 Accepts]: Start accepts. Automaton has 31799 states and 42724 transitions. Word has length 66 [2020-12-23 09:54:43,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:43,101 INFO L481 AbstractCegarLoop]: Abstraction has 31799 states and 42724 transitions. [2020-12-23 09:54:43,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:54:43,102 INFO L276 IsEmpty]: Start isEmpty. Operand 31799 states and 42724 transitions. [2020-12-23 09:54:43,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 09:54:43,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:43,104 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] [2020-12-23 09:54:43,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 09:54:43,318 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:43,320 INFO L82 PathProgramCache]: Analyzing trace with hash 338005999, now seen corresponding path program 1 times [2020-12-23 09:54:43,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:43,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796936782] [2020-12-23 09:54:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:43,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:43,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796936782] [2020-12-23 09:54:43,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:43,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:43,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15360580] [2020-12-23 09:54:43,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:43,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:43,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:43,380 INFO L87 Difference]: Start difference. First operand 31799 states and 42724 transitions. Second operand 3 states. [2020-12-23 09:54:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:44,947 INFO L93 Difference]: Finished difference Result 47017 states and 63333 transitions. [2020-12-23 09:54:44,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:44,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-23 09:54:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:44,991 INFO L225 Difference]: With dead ends: 47017 [2020-12-23 09:54:44,992 INFO L226 Difference]: Without dead ends: 18505 [2020-12-23 09:54:45,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18505 states. [2020-12-23 09:54:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18505 to 18269. [2020-12-23 09:54:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18269 states. [2020-12-23 09:54:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18269 states to 18269 states and 23886 transitions. [2020-12-23 09:54:46,728 INFO L78 Accepts]: Start accepts. Automaton has 18269 states and 23886 transitions. Word has length 66 [2020-12-23 09:54:46,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:46,729 INFO L481 AbstractCegarLoop]: Abstraction has 18269 states and 23886 transitions. [2020-12-23 09:54:46,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:46,729 INFO L276 IsEmpty]: Start isEmpty. Operand 18269 states and 23886 transitions. [2020-12-23 09:54:46,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 09:54:46,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:46,731 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] [2020-12-23 09:54:46,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 09:54:46,732 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:46,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:46,738 INFO L82 PathProgramCache]: Analyzing trace with hash -909501617, now seen corresponding path program 1 times [2020-12-23 09:54:46,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:46,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935710506] [2020-12-23 09:54:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:46,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935710506] [2020-12-23 09:54:46,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:46,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 09:54:46,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039129138] [2020-12-23 09:54:46,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 09:54:46,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:46,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 09:54:46,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:46,806 INFO L87 Difference]: Start difference. First operand 18269 states and 23886 transitions. Second operand 3 states. [2020-12-23 09:54:48,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:48,098 INFO L93 Difference]: Finished difference Result 28171 states and 37017 transitions. [2020-12-23 09:54:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 09:54:48,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-23 09:54:48,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:48,115 INFO L225 Difference]: With dead ends: 28171 [2020-12-23 09:54:48,115 INFO L226 Difference]: Without dead ends: 12159 [2020-12-23 09:54:48,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 09:54:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12159 states. [2020-12-23 09:54:49,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12159 to 12157. [2020-12-23 09:54:49,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12157 states. [2020-12-23 09:54:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12157 states to 12157 states and 15509 transitions. [2020-12-23 09:54:49,221 INFO L78 Accepts]: Start accepts. Automaton has 12157 states and 15509 transitions. Word has length 66 [2020-12-23 09:54:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:49,222 INFO L481 AbstractCegarLoop]: Abstraction has 12157 states and 15509 transitions. [2020-12-23 09:54:49,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 09:54:49,222 INFO L276 IsEmpty]: Start isEmpty. Operand 12157 states and 15509 transitions. [2020-12-23 09:54:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 09:54:49,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:49,224 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] [2020-12-23 09:54:49,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 09:54:49,224 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:49,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:49,224 INFO L82 PathProgramCache]: Analyzing trace with hash 2060627063, now seen corresponding path program 1 times [2020-12-23 09:54:49,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:49,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656480287] [2020-12-23 09:54:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-23 09:54:49,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656480287] [2020-12-23 09:54:49,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:49,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:49,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469534272] [2020-12-23 09:54:49,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:54:49,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:49,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:54:49,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:54:49,291 INFO L87 Difference]: Start difference. First operand 12157 states and 15509 transitions. Second operand 6 states. [2020-12-23 09:54:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:50,015 INFO L93 Difference]: Finished difference Result 18368 states and 23564 transitions. [2020-12-23 09:54:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:54:50,016 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-23 09:54:50,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:50,025 INFO L225 Difference]: With dead ends: 18368 [2020-12-23 09:54:50,025 INFO L226 Difference]: Without dead ends: 6316 [2020-12-23 09:54:50,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:54:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6316 states. [2020-12-23 09:54:50,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6316 to 6316. [2020-12-23 09:54:50,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6316 states. [2020-12-23 09:54:50,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6316 states to 6316 states and 7993 transitions. [2020-12-23 09:54:50,624 INFO L78 Accepts]: Start accepts. Automaton has 6316 states and 7993 transitions. Word has length 66 [2020-12-23 09:54:50,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:50,625 INFO L481 AbstractCegarLoop]: Abstraction has 6316 states and 7993 transitions. [2020-12-23 09:54:50,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:54:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 6316 states and 7993 transitions. [2020-12-23 09:54:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 09:54:50,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:50,626 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] [2020-12-23 09:54:50,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 09:54:50,627 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:50,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:50,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1909338697, now seen corresponding path program 1 times [2020-12-23 09:54:50,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:50,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316753221] [2020-12-23 09:54:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:54:50,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316753221] [2020-12-23 09:54:50,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:50,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 09:54:50,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549813497] [2020-12-23 09:54:50,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 09:54:50,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:50,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 09:54:50,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:54:50,723 INFO L87 Difference]: Start difference. First operand 6316 states and 7993 transitions. Second operand 7 states. [2020-12-23 09:54:51,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:51,304 INFO L93 Difference]: Finished difference Result 12868 states and 16391 transitions. [2020-12-23 09:54:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:54:51,305 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-12-23 09:54:51,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:51,311 INFO L225 Difference]: With dead ends: 12868 [2020-12-23 09:54:51,311 INFO L226 Difference]: Without dead ends: 6669 [2020-12-23 09:54:51,316 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 [2020-12-23 09:54:51,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6669 states. [2020-12-23 09:54:52,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6669 to 6667. [2020-12-23 09:54:52,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6667 states. [2020-12-23 09:54:52,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6667 states to 6667 states and 8431 transitions. [2020-12-23 09:54:52,072 INFO L78 Accepts]: Start accepts. Automaton has 6667 states and 8431 transitions. Word has length 66 [2020-12-23 09:54:52,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:52,072 INFO L481 AbstractCegarLoop]: Abstraction has 6667 states and 8431 transitions. [2020-12-23 09:54:52,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 09:54:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 6667 states and 8431 transitions. [2020-12-23 09:54:52,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 09:54:52,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:52,074 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] [2020-12-23 09:54:52,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-23 09:54:52,074 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:52,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:52,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1136949911, now seen corresponding path program 1 times [2020-12-23 09:54:52,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:52,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111897262] [2020-12-23 09:54:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:52,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 09:54:52,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111897262] [2020-12-23 09:54:52,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:54:52,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:54:52,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434781224] [2020-12-23 09:54:52,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 09:54:52,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:52,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 09:54:52,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:54:52,142 INFO L87 Difference]: Start difference. First operand 6667 states and 8431 transitions. Second operand 6 states. [2020-12-23 09:54:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:54:53,202 INFO L93 Difference]: Finished difference Result 16657 states and 21290 transitions. [2020-12-23 09:54:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:54:53,203 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-12-23 09:54:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:54:53,212 INFO L225 Difference]: With dead ends: 16657 [2020-12-23 09:54:53,212 INFO L226 Difference]: Without dead ends: 10047 [2020-12-23 09:54:53,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:54:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10047 states. [2020-12-23 09:54:53,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10047 to 9217. [2020-12-23 09:54:53,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9217 states. [2020-12-23 09:54:53,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9217 states to 9217 states and 11677 transitions. [2020-12-23 09:54:53,927 INFO L78 Accepts]: Start accepts. Automaton has 9217 states and 11677 transitions. Word has length 66 [2020-12-23 09:54:53,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:54:53,927 INFO L481 AbstractCegarLoop]: Abstraction has 9217 states and 11677 transitions. [2020-12-23 09:54:53,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 09:54:53,927 INFO L276 IsEmpty]: Start isEmpty. Operand 9217 states and 11677 transitions. [2020-12-23 09:54:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 09:54:53,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:54:53,929 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] [2020-12-23 09:54:53,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 09:54:53,929 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:54:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:54:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash 72303667, now seen corresponding path program 1 times [2020-12-23 09:54:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:54:53,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453004716] [2020-12-23 09:54:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:54:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:54,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453004716] [2020-12-23 09:54:54,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330857771] [2020-12-23 09:54:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:54:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:54:54,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 09:54:54,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:54:55,264 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 09:54:55,645 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-12-23 09:54:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:54:56,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:54:56,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-12-23 09:54:56,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847656766] [2020-12-23 09:54:56,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 09:54:56,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:54:56,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 09:54:56,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 09:54:56,276 INFO L87 Difference]: Start difference. First operand 9217 states and 11677 transitions. Second operand 33 states. [2020-12-23 09:54:56,565 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-12-23 09:54:57,595 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-12-23 09:54:57,777 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-23 09:54:58,022 WARN L197 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2020-12-23 09:54:58,419 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-12-23 09:54:58,877 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2020-12-23 09:54:59,357 WARN L197 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 101 [2020-12-23 09:54:59,686 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-12-23 09:55:00,070 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-12-23 09:55:00,422 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2020-12-23 09:55:00,799 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75 [2020-12-23 09:55:01,084 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-12-23 09:55:01,416 WARN L197 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-12-23 09:55:01,626 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-12-23 09:55:01,823 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-23 09:55:02,123 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-12-23 09:55:02,423 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2020-12-23 09:55:03,177 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2020-12-23 09:55:03,390 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-12-23 09:55:03,645 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-12-23 09:55:04,168 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-12-23 09:55:04,697 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-23 09:55:05,200 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-12-23 09:55:05,534 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-12-23 09:55:05,960 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-12-23 09:55:06,380 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2020-12-23 09:55:06,748 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-12-23 09:55:07,023 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-23 09:55:07,229 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-12-23 09:55:07,819 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 112 [2020-12-23 09:55:08,168 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-12-23 09:55:10,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:10,780 INFO L93 Difference]: Finished difference Result 29338 states and 38131 transitions. [2020-12-23 09:55:10,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 09:55:10,783 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 67 [2020-12-23 09:55:10,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:10,810 INFO L225 Difference]: With dead ends: 29338 [2020-12-23 09:55:10,810 INFO L226 Difference]: Without dead ends: 24561 [2020-12-23 09:55:10,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=955, Invalid=4745, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 09:55:10,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24561 states. [2020-12-23 09:55:11,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24561 to 8269. [2020-12-23 09:55:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8269 states. [2020-12-23 09:55:11,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8269 states to 8269 states and 10534 transitions. [2020-12-23 09:55:11,867 INFO L78 Accepts]: Start accepts. Automaton has 8269 states and 10534 transitions. Word has length 67 [2020-12-23 09:55:11,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:11,868 INFO L481 AbstractCegarLoop]: Abstraction has 8269 states and 10534 transitions. [2020-12-23 09:55:11,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 09:55:11,868 INFO L276 IsEmpty]: Start isEmpty. Operand 8269 states and 10534 transitions. [2020-12-23 09:55:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 09:55:11,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:11,869 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] [2020-12-23 09:55:12,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:55:12,078 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:12,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:12,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1790008711, now seen corresponding path program 1 times [2020-12-23 09:55:12,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:12,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964385610] [2020-12-23 09:55:12,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:13,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964385610] [2020-12-23 09:55:13,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906113741] [2020-12-23 09:55:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:55:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:13,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 09:55:13,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:55:13,748 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 09:55:14,239 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 34 [2020-12-23 09:55:14,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:14,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:55:14,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-12-23 09:55:14,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051417165] [2020-12-23 09:55:14,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 09:55:14,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:14,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 09:55:14,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 09:55:14,837 INFO L87 Difference]: Start difference. First operand 8269 states and 10534 transitions. Second operand 33 states. [2020-12-23 09:55:15,213 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2020-12-23 09:55:16,168 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-23 09:55:16,625 WARN L197 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-12-23 09:55:17,231 WARN L197 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 75 [2020-12-23 09:55:17,776 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-12-23 09:55:18,481 WARN L197 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-12-23 09:55:19,152 WARN L197 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2020-12-23 09:55:19,555 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-12-23 09:55:19,913 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-12-23 09:55:20,287 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-12-23 09:55:20,619 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-12-23 09:55:21,014 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 58 [2020-12-23 09:55:21,296 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-12-23 09:55:21,541 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-23 09:55:21,919 WARN L197 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 58 [2020-12-23 09:55:22,177 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-12-23 09:55:22,797 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-12-23 09:55:22,992 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-23 09:55:23,290 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-23 09:55:23,554 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-12-23 09:55:24,306 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2020-12-23 09:55:24,920 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-23 09:55:25,122 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-12-23 09:55:25,840 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-12-23 09:55:26,215 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-12-23 09:55:26,493 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-12-23 09:55:27,027 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-23 09:55:27,289 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-12-23 09:55:28,023 WARN L197 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-12-23 09:55:28,625 WARN L197 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-12-23 09:55:29,507 WARN L197 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-12-23 09:55:29,721 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-23 09:55:30,325 WARN L197 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-12-23 09:55:30,607 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-23 09:55:30,866 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-12-23 09:55:31,215 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-23 09:55:31,570 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-12-23 09:55:31,832 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-23 09:55:32,344 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-12-23 09:55:33,506 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-23 09:55:34,091 WARN L197 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-12-23 09:55:34,478 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-23 09:55:34,705 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-12-23 09:55:35,084 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-12-23 09:55:35,461 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-23 09:55:35,874 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-12-23 09:55:36,183 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-23 09:55:37,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:37,358 INFO L93 Difference]: Finished difference Result 22171 states and 28463 transitions. [2020-12-23 09:55:37,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 09:55:37,360 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 67 [2020-12-23 09:55:37,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:37,381 INFO L225 Difference]: With dead ends: 22171 [2020-12-23 09:55:37,381 INFO L226 Difference]: Without dead ends: 17546 [2020-12-23 09:55:37,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=1626, Invalid=7494, Unknown=0, NotChecked=0, Total=9120 [2020-12-23 09:55:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17546 states. [2020-12-23 09:55:38,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17546 to 7688. [2020-12-23 09:55:38,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7688 states. [2020-12-23 09:55:38,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7688 states to 7688 states and 9866 transitions. [2020-12-23 09:55:38,628 INFO L78 Accepts]: Start accepts. Automaton has 7688 states and 9866 transitions. Word has length 67 [2020-12-23 09:55:38,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:38,628 INFO L481 AbstractCegarLoop]: Abstraction has 7688 states and 9866 transitions. [2020-12-23 09:55:38,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 09:55:38,629 INFO L276 IsEmpty]: Start isEmpty. Operand 7688 states and 9866 transitions. [2020-12-23 09:55:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 09:55:38,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:38,629 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] [2020-12-23 09:55:38,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 09:55:38,832 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:38,833 INFO L82 PathProgramCache]: Analyzing trace with hash -316809972, now seen corresponding path program 1 times [2020-12-23 09:55:38,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:38,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456440606] [2020-12-23 09:55:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:39,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456440606] [2020-12-23 09:55:39,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037818509] [2020-12-23 09:55:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:55:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:39,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 09:55:39,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:55:40,026 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 09:55:40,347 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 31 [2020-12-23 09:55:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:40,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:55:40,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2020-12-23 09:55:40,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817265117] [2020-12-23 09:55:40,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 09:55:40,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:40,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 09:55:40,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-12-23 09:55:40,819 INFO L87 Difference]: Start difference. First operand 7688 states and 9866 transitions. Second operand 23 states. [2020-12-23 09:55:41,450 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 25 [2020-12-23 09:55:41,740 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-12-23 09:55:42,043 WARN L197 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-12-23 09:55:42,351 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-12-23 09:55:42,559 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-12-23 09:55:42,863 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-23 09:55:43,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:43,888 INFO L93 Difference]: Finished difference Result 10016 states and 12930 transitions. [2020-12-23 09:55:43,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 09:55:43,890 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-12-23 09:55:43,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:43,897 INFO L225 Difference]: With dead ends: 10016 [2020-12-23 09:55:43,897 INFO L226 Difference]: Without dead ends: 5717 [2020-12-23 09:55:43,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 09:55:43,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5717 states. [2020-12-23 09:55:44,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5717 to 4699. [2020-12-23 09:55:44,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4699 states. [2020-12-23 09:55:44,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4699 states to 4699 states and 6098 transitions. [2020-12-23 09:55:44,483 INFO L78 Accepts]: Start accepts. Automaton has 4699 states and 6098 transitions. Word has length 69 [2020-12-23 09:55:44,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:44,483 INFO L481 AbstractCegarLoop]: Abstraction has 4699 states and 6098 transitions. [2020-12-23 09:55:44,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 09:55:44,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4699 states and 6098 transitions. [2020-12-23 09:55:44,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 09:55:44,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:44,486 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] [2020-12-23 09:55:44,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:55:44,701 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:44,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:44,702 INFO L82 PathProgramCache]: Analyzing trace with hash 805682706, now seen corresponding path program 1 times [2020-12-23 09:55:44,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:44,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496024924] [2020-12-23 09:55:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:45,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496024924] [2020-12-23 09:55:45,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231287231] [2020-12-23 09:55:45,092 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 [2020-12-23 09:55:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:45,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 09:55:45,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:55:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 12 proven. 67 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 09:55:45,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:55:45,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 17 [2020-12-23 09:55:45,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145320699] [2020-12-23 09:55:45,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:55:45,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:55:45,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:55:45,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:55:45,728 INFO L87 Difference]: Start difference. First operand 4699 states and 6098 transitions. Second operand 17 states. [2020-12-23 09:55:45,869 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-12-23 09:55:46,301 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-12-23 09:55:46,563 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-23 09:55:46,710 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-12-23 09:55:46,903 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-23 09:55:47,086 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-23 09:55:47,324 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-23 09:55:47,501 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-23 09:55:47,892 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-12-23 09:55:48,073 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-12-23 09:55:48,260 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-23 09:55:48,517 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-23 09:55:48,812 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-23 09:55:49,018 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-23 09:55:49,251 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-23 09:55:49,420 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-23 09:55:49,612 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-23 09:55:49,811 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-23 09:55:50,603 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-12-23 09:55:50,839 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-12-23 09:55:51,049 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-23 09:55:51,269 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-12-23 09:55:51,904 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-23 09:55:52,356 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-23 09:55:52,498 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-23 09:55:52,651 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2020-12-23 09:55:53,315 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-12-23 09:55:53,523 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-23 09:55:53,720 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-12-23 09:55:53,885 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-12-23 09:55:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:55:54,462 INFO L93 Difference]: Finished difference Result 15471 states and 19894 transitions. [2020-12-23 09:55:54,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 09:55:54,463 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 110 [2020-12-23 09:55:54,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:55:54,475 INFO L225 Difference]: With dead ends: 15471 [2020-12-23 09:55:54,476 INFO L226 Difference]: Without dead ends: 11121 [2020-12-23 09:55:54,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=500, Invalid=2256, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 09:55:54,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11121 states. [2020-12-23 09:55:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11121 to 8459. [2020-12-23 09:55:55,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8459 states. [2020-12-23 09:55:55,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8459 states to 8459 states and 10370 transitions. [2020-12-23 09:55:55,658 INFO L78 Accepts]: Start accepts. Automaton has 8459 states and 10370 transitions. Word has length 110 [2020-12-23 09:55:55,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:55:55,658 INFO L481 AbstractCegarLoop]: Abstraction has 8459 states and 10370 transitions. [2020-12-23 09:55:55,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:55:55,658 INFO L276 IsEmpty]: Start isEmpty. Operand 8459 states and 10370 transitions. [2020-12-23 09:55:55,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 09:55:55,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:55:55,661 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] [2020-12-23 09:55:55,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 09:55:55,863 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:55:55,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:55:55,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1445084205, now seen corresponding path program 1 times [2020-12-23 09:55:55,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:55:55,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626404186] [2020-12-23 09:55:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:55:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:55:56,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626404186] [2020-12-23 09:55:56,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295556448] [2020-12-23 09:55:56,391 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 [2020-12-23 09:55:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:55:56,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 09:55:56,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:55:57,222 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-23 09:55:57,368 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:55:57,718 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:55:58,641 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:55:59,821 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:01,488 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:05,553 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:05,590 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 09:56:08,006 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 09:56:26,201 WARN L197 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 458 DAG size of output: 398 [2020-12-23 09:56:51,920 WARN L197 SmtUtils]: Spent 845.00 ms on a formula simplification that was a NOOP. DAG size: 398