java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-simple/sll2n_remove_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:02:54,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:02:54,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:02:54,363 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:02:54,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:02:54,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:02:54,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:02:54,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:02:54,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:02:54,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:02:54,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:02:54,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:02:54,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:02:54,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:02:54,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:02:54,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:02:54,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:02:54,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:02:54,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:02:54,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:02:54,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:02:54,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:02:54,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:02:54,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:02:54,426 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-20 13:02:54,427 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-20 13:02:54,427 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-20 13:02:54,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-20 13:02:54,430 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-20 13:02:54,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-20 13:02:54,433 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:02:54,434 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:02:54,435 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:02:54,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:02:54,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:02:54,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:02:54,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:02:54,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:02:54,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:02:54,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:02:54,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:02:54,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-20 13:02:54,464 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:02:54,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:02:54,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 13:02:54,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 13:02:54,467 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 13:02:54,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:02:54,467 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:02:54,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 13:02:54,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:02:54,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:02:54,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:02:54,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:02:54,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:02:54,470 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:02:54,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:02:54,471 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 13:02:54,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:02:54,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:02:54,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:02:54,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 13:02:54,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 13:02:54,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:02:54,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:02:54,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:02:54,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 13:02:54,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 13:02:54,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:02:54,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 13:02:54,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:02:54,531 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:02:54,549 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:02:54,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:02:54,554 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:02:54,555 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:02:54,556 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_remove_all_reverse.i [2019-09-20 13:02:54,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/269514c0f/282392c218c843e6ba0ccf39743b08f3/FLAG6e9915161 [2019-09-20 13:02:55,106 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:02:55,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_remove_all_reverse.i [2019-09-20 13:02:55,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/269514c0f/282392c218c843e6ba0ccf39743b08f3/FLAG6e9915161 [2019-09-20 13:02:55,406 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/269514c0f/282392c218c843e6ba0ccf39743b08f3 [2019-09-20 13:02:55,415 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:02:55,416 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:02:55,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:02:55,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:02:55,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:02:55,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:02:55" (1/1) ... [2019-09-20 13:02:55,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d8c8127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:55, skipping insertion in model container [2019-09-20 13:02:55,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:02:55" (1/1) ... [2019-09-20 13:02:55,433 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:02:55,476 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:02:55,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:02:55,971 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:02:56,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:02:56,082 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:02:56,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:56 WrapperNode [2019-09-20 13:02:56,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:02:56,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:02:56,085 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:02:56,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:02:56,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:56" (1/1) ... [2019-09-20 13:02:56,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:56" (1/1) ... [2019-09-20 13:02:56,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:56" (1/1) ... [2019-09-20 13:02:56,129 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:56" (1/1) ... [2019-09-20 13:02:56,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:56" (1/1) ... [2019-09-20 13:02:56,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:56" (1/1) ... [2019-09-20 13:02:56,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:56" (1/1) ... [2019-09-20 13:02:56,165 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:02:56,166 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:02:56,166 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:02:56,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:02:56,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-09-20 13:02:56,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:02:56,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:02:56,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-09-20 13:02:56,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-09-20 13:02:56,224 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-09-20 13:02:56,224 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-09-20 13:02:56,224 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-09-20 13:02:56,224 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_remove_last [2019-09-20 13:02:56,225 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:02:56,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:02:56,225 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-09-20 13:02:56,225 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-09-20 13:02:56,225 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-09-20 13:02:56,225 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-09-20 13:02:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-09-20 13:02:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-09-20 13:02:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-09-20 13:02:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-09-20 13:02:56,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-09-20 13:02:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-09-20 13:02:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-09-20 13:02:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-09-20 13:02:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-09-20 13:02:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-09-20 13:02:56,227 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-09-20 13:02:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-09-20 13:02:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-09-20 13:02:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-09-20 13:02:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-09-20 13:02:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-09-20 13:02:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-09-20 13:02:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-09-20 13:02:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-09-20 13:02:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-09-20 13:02:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-09-20 13:02:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-09-20 13:02:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-09-20 13:02:56,230 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-09-20 13:02:56,230 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-09-20 13:02:56,230 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-09-20 13:02:56,230 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-09-20 13:02:56,230 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-09-20 13:02:56,230 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-09-20 13:02:56,230 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-09-20 13:02:56,231 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-09-20 13:02:56,231 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-09-20 13:02:56,231 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-09-20 13:02:56,231 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-09-20 13:02:56,231 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-09-20 13:02:56,231 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-09-20 13:02:56,232 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-09-20 13:02:56,232 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-09-20 13:02:56,232 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-09-20 13:02:56,232 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-09-20 13:02:56,232 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-09-20 13:02:56,232 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-09-20 13:02:56,232 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-09-20 13:02:56,233 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-09-20 13:02:56,233 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-09-20 13:02:56,233 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-09-20 13:02:56,233 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-09-20 13:02:56,233 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-09-20 13:02:56,234 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-20 13:02:56,234 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-09-20 13:02:56,234 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-09-20 13:02:56,234 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-09-20 13:02:56,234 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-09-20 13:02:56,234 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-09-20 13:02:56,235 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-09-20 13:02:56,235 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-09-20 13:02:56,235 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-09-20 13:02:56,235 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-09-20 13:02:56,235 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-09-20 13:02:56,235 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-09-20 13:02:56,236 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-09-20 13:02:56,236 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-20 13:02:56,236 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-09-20 13:02:56,236 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-09-20 13:02:56,236 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-09-20 13:02:56,236 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-09-20 13:02:56,237 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-09-20 13:02:56,237 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-09-20 13:02:56,237 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-09-20 13:02:56,237 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-09-20 13:02:56,237 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-09-20 13:02:56,237 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-09-20 13:02:56,237 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-09-20 13:02:56,238 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-09-20 13:02:56,238 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-09-20 13:02:56,238 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-09-20 13:02:56,238 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-09-20 13:02:56,238 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-09-20 13:02:56,238 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-09-20 13:02:56,238 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-09-20 13:02:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-09-20 13:02:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-09-20 13:02:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-09-20 13:02:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-09-20 13:02:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-09-20 13:02:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-09-20 13:02:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-09-20 13:02:56,240 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-09-20 13:02:56,240 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-09-20 13:02:56,240 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-09-20 13:02:56,240 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-09-20 13:02:56,240 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-09-20 13:02:56,240 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-09-20 13:02:56,240 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-09-20 13:02:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-09-20 13:02:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-09-20 13:02:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-09-20 13:02:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-09-20 13:02:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-09-20 13:02:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-09-20 13:02:56,241 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-09-20 13:02:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-09-20 13:02:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-09-20 13:02:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-20 13:02:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-20 13:02:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:02:56,242 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-09-20 13:02:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure sll_remove_last [2019-09-20 13:02:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-20 13:02:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:02:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:02:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:02:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-09-20 13:02:56,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:02:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:02:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:02:56,563 INFO L683 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-09-20 13:02:56,761 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:02:56,762 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-20 13:02:56,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:02:56 BoogieIcfgContainer [2019-09-20 13:02:56,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:02:56,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:02:56,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:02:56,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:02:56,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:02:55" (1/3) ... [2019-09-20 13:02:56,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50674d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:02:56, skipping insertion in model container [2019-09-20 13:02:56,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:02:56" (2/3) ... [2019-09-20 13:02:56,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50674d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:02:56, skipping insertion in model container [2019-09-20 13:02:56,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:02:56" (3/3) ... [2019-09-20 13:02:56,772 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2019-09-20 13:02:56,782 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:02:56,791 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:02:56,814 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:02:56,846 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 13:02:56,847 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:02:56,847 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 13:02:56,847 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:02:56,847 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:02:56,848 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:02:56,848 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:02:56,848 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:02:56,848 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:02:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2019-09-20 13:02:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-20 13:02:56,874 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:56,875 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:02:56,877 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:56,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:56,884 INFO L82 PathProgramCache]: Analyzing trace with hash 852060024, now seen corresponding path program 1 times [2019-09-20 13:02:56,886 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:56,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:56,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:56,947 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:56,947 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:02:57,092 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:02:57,092 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:02:57,096 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:02:57,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:02:57,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:02:57,122 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 2 states. [2019-09-20 13:02:57,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:02:57,169 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2019-09-20 13:02:57,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:02:57,171 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-09-20 13:02:57,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:02:57,188 INFO L225 Difference]: With dead ends: 64 [2019-09-20 13:02:57,188 INFO L226 Difference]: Without dead ends: 35 [2019-09-20 13:02:57,196 INFO L636 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 [2019-09-20 13:02:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-20 13:02:57,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-09-20 13:02:57,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-20 13:02:57,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-09-20 13:02:57,263 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 17 [2019-09-20 13:02:57,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:02:57,264 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-09-20 13:02:57,264 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:02:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-09-20 13:02:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-20 13:02:57,267 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:57,267 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:02:57,268 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:57,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:57,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1868381993, now seen corresponding path program 1 times [2019-09-20 13:02:57,270 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:57,270 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:57,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:57,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:57,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:02:57,373 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:02:57,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:02:57,375 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:02:57,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:02:57,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:02:57,376 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 4 states. [2019-09-20 13:02:57,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:02:57,420 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-09-20 13:02:57,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:02:57,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-09-20 13:02:57,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:02:57,423 INFO L225 Difference]: With dead ends: 42 [2019-09-20 13:02:57,423 INFO L226 Difference]: Without dead ends: 38 [2019-09-20 13:02:57,424 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:02:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-20 13:02:57,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2019-09-20 13:02:57,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-20 13:02:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2019-09-20 13:02:57,439 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 17 [2019-09-20 13:02:57,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:02:57,439 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2019-09-20 13:02:57,439 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:02:57,440 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2019-09-20 13:02:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-20 13:02:57,441 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:57,441 INFO L407 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] [2019-09-20 13:02:57,441 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:57,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:57,442 INFO L82 PathProgramCache]: Analyzing trace with hash 528543346, now seen corresponding path program 1 times [2019-09-20 13:02:57,442 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:57,442 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:57,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:57,447 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:57,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:02:57,600 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:02:57,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 13:02:57,601 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 13:02:57,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 13:02:57,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:02:57,602 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2019-09-20 13:02:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:02:57,735 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-09-20 13:02:57,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:02:57,736 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-09-20 13:02:57,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:02:57,739 INFO L225 Difference]: With dead ends: 50 [2019-09-20 13:02:57,739 INFO L226 Difference]: Without dead ends: 36 [2019-09-20 13:02:57,740 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:02:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-20 13:02:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-09-20 13:02:57,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-20 13:02:57,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-09-20 13:02:57,750 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2019-09-20 13:02:57,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:02:57,751 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-09-20 13:02:57,752 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 13:02:57,752 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-09-20 13:02:57,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-20 13:02:57,753 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:57,754 INFO L407 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] [2019-09-20 13:02:57,756 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:57,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:57,760 INFO L82 PathProgramCache]: Analyzing trace with hash -233245789, now seen corresponding path program 1 times [2019-09-20 13:02:57,760 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:57,760 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:57,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:57,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:57,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:57,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:02:57,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:02:57,907 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:02:58,001 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:58,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-20 13:02:58,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:02:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 13:02:58,103 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:02:58,104 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 8 [2019-09-20 13:02:58,104 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 13:02:58,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 13:02:58,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:02:58,105 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 8 states. [2019-09-20 13:02:58,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:02:58,194 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2019-09-20 13:02:58,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 13:02:58,197 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2019-09-20 13:02:58,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:02:58,198 INFO L225 Difference]: With dead ends: 59 [2019-09-20 13:02:58,198 INFO L226 Difference]: Without dead ends: 40 [2019-09-20 13:02:58,199 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:02:58,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-20 13:02:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2019-09-20 13:02:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-20 13:02:58,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-09-20 13:02:58,212 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2019-09-20 13:02:58,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:02:58,213 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-09-20 13:02:58,213 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 13:02:58,213 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-09-20 13:02:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-09-20 13:02:58,215 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:58,216 INFO L407 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] [2019-09-20 13:02:58,216 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:58,216 INFO L82 PathProgramCache]: Analyzing trace with hash -2086641938, now seen corresponding path program 1 times [2019-09-20 13:02:58,217 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:58,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:58,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:58,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:58,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:02:58,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:02:58,395 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:02:58,480 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:58,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-20 13:02:58,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:02:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 13:02:58,558 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:02:58,558 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 9 [2019-09-20 13:02:58,560 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 13:02:58,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 13:02:58,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:02:58,561 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 9 states. [2019-09-20 13:02:58,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:02:58,684 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2019-09-20 13:02:58,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:02:58,684 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2019-09-20 13:02:58,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:02:58,686 INFO L225 Difference]: With dead ends: 65 [2019-09-20 13:02:58,686 INFO L226 Difference]: Without dead ends: 46 [2019-09-20 13:02:58,686 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-20 13:02:58,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-20 13:02:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2019-09-20 13:02:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-20 13:02:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2019-09-20 13:02:58,694 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 36 [2019-09-20 13:02:58,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:02:58,694 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2019-09-20 13:02:58,695 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 13:02:58,695 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2019-09-20 13:02:58,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-20 13:02:58,700 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:58,700 INFO L407 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] [2019-09-20 13:02:58,701 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:58,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:58,701 INFO L82 PathProgramCache]: Analyzing trace with hash -37390333, now seen corresponding path program 2 times [2019-09-20 13:02:58,701 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:58,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:58,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:58,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:02:58,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-09-20 13:02:58,762 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:02:58,762 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:02:58,842 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 13:02:58,890 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 13:02:58,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:02:58,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-20 13:02:58,895 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:02:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-09-20 13:02:58,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:02:58,916 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-09-20 13:02:58,917 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:02:58,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:02:58,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:02:58,918 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 5 states. [2019-09-20 13:02:58,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:02:58,974 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2019-09-20 13:02:58,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 13:02:58,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2019-09-20 13:02:58,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:02:58,976 INFO L225 Difference]: With dead ends: 48 [2019-09-20 13:02:58,977 INFO L226 Difference]: Without dead ends: 44 [2019-09-20 13:02:58,978 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:02:58,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-20 13:02:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-09-20 13:02:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-20 13:02:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-09-20 13:02:58,996 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 45 [2019-09-20 13:02:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:02:58,997 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-09-20 13:02:58,997 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:02:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-09-20 13:02:59,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-20 13:02:59,001 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:02:59,001 INFO L407 BasicCegarLoop]: trace histogram [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] [2019-09-20 13:02:59,001 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:02:59,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:02:59,002 INFO L82 PathProgramCache]: Analyzing trace with hash -271473713, now seen corresponding path program 3 times [2019-09-20 13:02:59,002 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:02:59,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:02:59,008 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:59,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 13:02:59,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:02:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:02:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-20 13:02:59,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:02:59,470 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:02:59,553 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-20 13:02:59,603 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-20 13:02:59,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:02:59,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-20 13:02:59,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:02:59,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:02:59,848 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:02:59,849 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 45 [2019-09-20 13:02:59,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:02:59,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:02:59,855 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-20 13:02:59,875 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:02:59,876 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 55 [2019-09-20 13:02:59,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:02:59,879 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:02:59,880 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-20 13:02:59,913 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:02:59,914 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:02:59,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:02:59,916 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-09-20 13:02:59,916 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:113, output treesize:89 [2019-09-20 13:02:59,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:02:59,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:03:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Stream closed [2019-09-20 13:03:00,008 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:03:00,008 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [15] total 19 [2019-09-20 13:03:00,009 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-20 13:03:00,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-20 13:03:00,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2019-09-20 13:03:00,010 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 19 states. [2019-09-20 13:03:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:03:00,684 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-09-20 13:03:00,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-20 13:03:00,684 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2019-09-20 13:03:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:03:00,685 INFO L225 Difference]: With dead ends: 62 [2019-09-20 13:03:00,686 INFO L226 Difference]: Without dead ends: 46 [2019-09-20 13:03:00,687 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2019-09-20 13:03:00,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-20 13:03:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-09-20 13:03:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-20 13:03:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-09-20 13:03:00,694 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 55 [2019-09-20 13:03:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:03:00,694 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-09-20 13:03:00,695 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-20 13:03:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-09-20 13:03:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-20 13:03:00,696 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:03:00,696 INFO L407 BasicCegarLoop]: trace histogram [4, 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] [2019-09-20 13:03:00,696 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:03:00,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:03:00,697 INFO L82 PathProgramCache]: Analyzing trace with hash 278447769, now seen corresponding path program 1 times [2019-09-20 13:03:00,697 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:03:00,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:03:00,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:03:00,700 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 13:03:00,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:03:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:03:01,204 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2019-09-20 13:03:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:03:01,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:03:01,797 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:03:01,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:03:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:03:01,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-20 13:03:01,930 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:03:03,291 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_remove_last_~snd_to_last~0.offset Int)) (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_remove_last_#in~head.base|) |c_sll_remove_last_#in~head.offset|)) (.cse1 (+ sll_remove_last_~snd_to_last~0.offset 4)) (.cse2 (select (select |c_old(#memory_$Pointer$.offset)| |c_sll_remove_last_#in~head.base|) |c_sll_remove_last_#in~head.offset|))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| .cse0 (store (select |c_old(#memory_$Pointer$.base)| .cse0) .cse1 0))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| .cse0 (store (select |c_old(#memory_$Pointer$.offset)| .cse0) .cse1 0))) (<= sll_remove_last_~snd_to_last~0.offset .cse2) (<= .cse2 sll_remove_last_~snd_to_last~0.offset)))) is different from true [2019-09-20 13:03:03,303 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 13:03:03,308 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2019-09-20 13:03:03,309 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:03:03,326 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:03,353 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:03,354 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 62 [2019-09-20 13:03:03,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-09-20 13:03:03,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:03:03,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:03:03,360 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2019-09-20 13:03:03,430 INFO L567 ElimStorePlain]: treesize reduction 94, result has 36.5 percent of original size [2019-09-20 13:03:03,431 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-20 13:03:03,432 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:53 [2019-09-20 13:03:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 13:03:03,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:03:03,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 33 [2019-09-20 13:03:03,667 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-20 13:03:03,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-20 13:03:03,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=918, Unknown=1, NotChecked=60, Total=1056 [2019-09-20 13:03:03,668 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 33 states. [2019-09-20 13:03:07,236 WARN L191 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2019-09-20 13:03:08,707 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2019-09-20 13:03:14,453 WARN L191 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 83 DAG size of output: 47 [2019-09-20 13:03:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:03:14,642 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2019-09-20 13:03:14,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-20 13:03:14,642 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 59 [2019-09-20 13:03:14,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:03:14,647 INFO L225 Difference]: With dead ends: 84 [2019-09-20 13:03:14,647 INFO L226 Difference]: Without dead ends: 51 [2019-09-20 13:03:14,649 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=230, Invalid=2421, Unknown=5, NotChecked=100, Total=2756 [2019-09-20 13:03:14,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-20 13:03:14,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-09-20 13:03:14,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-20 13:03:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2019-09-20 13:03:14,660 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 59 [2019-09-20 13:03:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:03:14,661 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2019-09-20 13:03:14,661 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-20 13:03:14,661 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2019-09-20 13:03:14,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-20 13:03:14,662 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:03:14,663 INFO L407 BasicCegarLoop]: trace histogram [5, 3, 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] [2019-09-20 13:03:14,663 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:03:14,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:03:14,663 INFO L82 PathProgramCache]: Analyzing trace with hash 932322430, now seen corresponding path program 2 times [2019-09-20 13:03:14,663 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:03:14,664 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:03:14,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:03:14,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:03:14,667 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:03:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:03:15,814 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2019-09-20 13:03:16,130 WARN L191 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2019-09-20 13:03:16,406 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2019-09-20 13:03:16,605 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2019-09-20 13:03:17,082 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2019-09-20 13:03:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-20 13:03:17,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:03:17,462 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:03:17,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-20 13:03:17,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 13:03:17,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 13:03:17,606 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 119 conjunts are in the unsatisfiable core [2019-09-20 13:03:17,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:03:17,663 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-09-20 13:03:17,663 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:03:17,671 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:17,671 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:03:17,672 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-09-20 13:03:17,851 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-09-20 13:03:17,852 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:03:17,863 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:17,869 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-09-20 13:03:17,869 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 13:03:17,880 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:17,880 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:03:17,881 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:34, output treesize:26 [2019-09-20 13:03:17,945 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-09-20 13:03:17,945 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:03:17,958 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:17,987 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2019-09-20 13:03:17,987 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 13:03:17,996 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:18,000 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2019-09-20 13:03:18,001 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-09-20 13:03:18,010 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:18,011 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:03:18,012 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:32, output treesize:10 [2019-09-20 13:03:20,192 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 29 [2019-09-20 13:03:20,210 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:20,210 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-09-20 13:03:20,211 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:03:20,233 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:20,240 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 13:03:20,241 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2019-09-20 13:03:20,242 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 13:03:20,260 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:20,267 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-20 13:03:20,268 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2019-09-20 13:03:20,269 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-09-20 13:03:20,284 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:20,285 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-20 13:03:20,286 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:71, output treesize:43 [2019-09-20 13:03:20,400 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:20,401 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 58 [2019-09-20 13:03:20,402 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:03:20,455 INFO L567 ElimStorePlain]: treesize reduction 18, result has 79.5 percent of original size [2019-09-20 13:03:20,473 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:20,474 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 58 [2019-09-20 13:03:20,474 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 13:03:20,530 INFO L567 ElimStorePlain]: treesize reduction 26, result has 71.7 percent of original size [2019-09-20 13:03:20,531 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:03:20,532 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-20 13:03:20,533 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:66, output treesize:81 [2019-09-20 13:03:20,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:03:28,903 WARN L191 SmtUtils]: Spent 4.25 s on a formula simplification that was a NOOP. DAG size: 34 [2019-09-20 13:03:29,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:03:29,881 INFO L392 ElimStorePlain]: Different costs {12=[|v_old(#memory_$Pointer$.offset)_AFTER_CALL_23|], 28=[|v_#memory_$Pointer$.base_BEFORE_CALL_8|]} [2019-09-20 13:03:29,947 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:29,948 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 183 treesize of output 188 [2019-09-20 13:03:29,950 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-20 13:03:29,972 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:29,972 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 183 treesize of output 163 [2019-09-20 13:03:29,974 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-20 13:03:29,975 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-20 13:03:29,975 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.base_BEFORE_CALL_8| vanished before elimination [2019-09-20 13:03:29,975 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-20 13:03:29,976 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:367, output treesize:1 [2019-09-20 13:03:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-20 13:03:29,995 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:03:29,996 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 23] total 48 [2019-09-20 13:03:29,996 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-20 13:03:29,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-20 13:03:29,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2138, Unknown=1, NotChecked=0, Total=2256 [2019-09-20 13:03:29,998 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 48 states. [2019-09-20 13:03:35,963 WARN L191 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2019-09-20 13:03:37,707 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2019-09-20 13:03:39,007 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2019-09-20 13:03:39,358 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 94 [2019-09-20 13:03:39,693 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 80 [2019-09-20 13:03:42,203 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 81 [2019-09-20 13:03:42,417 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58