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/dll2n_prepend_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:12:03,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:12:03,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:12:03,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:12:03,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:12:03,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:12:03,394 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:12:03,395 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:12:03,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:12:03,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:12:03,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:12:03,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:12:03,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:12:03,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:12:03,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:12:03,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:12:03,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:12:03,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:12:03,407 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:12:03,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:12:03,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:12:03,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:12:03,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:12:03,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:12:03,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:12:03,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:12:03,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:12:03,425 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:12:03,425 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:12:03,426 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:12:03,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:12:03,427 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:12:03,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:12:03,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:12:03,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:12:03,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:12:03,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:12:03,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:12:03,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:12:03,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:12:03,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:12:03,434 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 [2019-10-14 23:12:03,447 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:12:03,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:12:03,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:12:03,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:12:03,449 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:12:03,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:12:03,450 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:12:03,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:12:03,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:12:03,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:12:03,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:12:03,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:12:03,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:12:03,451 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:12:03,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:12:03,451 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:12:03,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:12:03,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:12:03,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:12:03,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:12:03,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:12:03,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:12:03,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:12:03,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:12:03,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:12:03,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:12:03,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:12:03,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:12:03,454 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:12:03,724 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:12:03,737 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:12:03,740 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:12:03,742 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:12:03,742 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:12:03,743 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2019-10-14 23:12:03,826 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cd02dc5a/1591fb3fdc794dd099750bab5306deee/FLAG495af499e [2019-10-14 23:12:04,395 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:12:04,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2019-10-14 23:12:04,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cd02dc5a/1591fb3fdc794dd099750bab5306deee/FLAG495af499e [2019-10-14 23:12:04,705 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cd02dc5a/1591fb3fdc794dd099750bab5306deee [2019-10-14 23:12:04,714 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:12:04,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:12:04,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:12:04,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:12:04,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:12:04,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:12:04" (1/1) ... [2019-10-14 23:12:04,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6048e641 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:04, skipping insertion in model container [2019-10-14 23:12:04,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:12:04" (1/1) ... [2019-10-14 23:12:04,728 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:12:04,772 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:12:05,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:12:05,194 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:12:05,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:12:05,313 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:12:05,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:05 WrapperNode [2019-10-14 23:12:05,315 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:12:05,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:12:05,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:12:05,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:12:05,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:05" (1/1) ... [2019-10-14 23:12:05,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:05" (1/1) ... [2019-10-14 23:12:05,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:05" (1/1) ... [2019-10-14 23:12:05,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:05" (1/1) ... [2019-10-14 23:12:05,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:05" (1/1) ... [2019-10-14 23:12:05,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:05" (1/1) ... [2019-10-14 23:12:05,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:05" (1/1) ... [2019-10-14 23:12:05,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:12:05,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:12:05,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:12:05,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:12:05,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:05" (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 [2019-10-14 23:12:05,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:12:05,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:12:05,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-14 23:12:05,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-14 23:12:05,455 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-14 23:12:05,456 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-10-14 23:12:05,456 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2019-10-14 23:12:05,456 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2019-10-14 23:12:05,457 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_prepend [2019-10-14 23:12:05,457 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:12:05,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:12:05,457 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-14 23:12:05,458 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-14 23:12:05,458 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-14 23:12:05,459 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-14 23:12:05,459 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-14 23:12:05,461 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-14 23:12:05,461 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-14 23:12:05,462 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-14 23:12:05,462 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-14 23:12:05,463 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-14 23:12:05,464 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-14 23:12:05,464 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-14 23:12:05,464 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-14 23:12:05,464 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-14 23:12:05,464 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-14 23:12:05,465 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-14 23:12:05,465 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-14 23:12:05,465 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-14 23:12:05,465 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-14 23:12:05,465 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-14 23:12:05,466 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-14 23:12:05,466 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-14 23:12:05,466 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-14 23:12:05,466 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-14 23:12:05,466 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-14 23:12:05,466 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-14 23:12:05,466 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-14 23:12:05,467 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-14 23:12:05,467 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-14 23:12:05,467 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-14 23:12:05,467 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-14 23:12:05,468 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-14 23:12:05,468 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-14 23:12:05,468 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-14 23:12:05,468 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-14 23:12:05,468 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-14 23:12:05,469 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-14 23:12:05,469 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-14 23:12:05,469 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-14 23:12:05,469 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-14 23:12:05,469 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-14 23:12:05,469 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-14 23:12:05,469 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-14 23:12:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-14 23:12:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-14 23:12:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-14 23:12:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-14 23:12:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-14 23:12:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-14 23:12:05,470 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-14 23:12:05,471 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-14 23:12:05,471 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-14 23:12:05,472 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:12:05,472 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-14 23:12:05,472 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-14 23:12:05,472 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-14 23:12:05,472 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-14 23:12:05,473 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-14 23:12:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-14 23:12:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-14 23:12:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-14 23:12:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-14 23:12:05,474 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-14 23:12:05,475 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-14 23:12:05,475 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-14 23:12:05,475 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:12:05,475 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-14 23:12:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-14 23:12:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-14 23:12:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-14 23:12:05,476 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-14 23:12:05,477 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-14 23:12:05,477 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-14 23:12:05,477 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-14 23:12:05,477 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-14 23:12:05,477 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-14 23:12:05,478 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-14 23:12:05,478 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-14 23:12:05,479 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-14 23:12:05,479 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-14 23:12:05,480 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-14 23:12:05,480 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-14 23:12:05,480 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-14 23:12:05,480 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-14 23:12:05,480 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-14 23:12:05,480 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-14 23:12:05,480 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-14 23:12:05,481 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-14 23:12:05,481 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-14 23:12:05,481 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-14 23:12:05,481 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-14 23:12:05,481 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-14 23:12:05,481 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-14 23:12:05,481 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-14 23:12:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-14 23:12:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-14 23:12:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-14 23:12:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-14 23:12:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-14 23:12:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-14 23:12:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-14 23:12:05,482 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-14 23:12:05,483 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-14 23:12:05,483 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-14 23:12:05,483 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-14 23:12:05,483 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-14 23:12:05,484 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-10-14 23:12:05,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 23:12:05,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 23:12:05,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:12:05,485 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2019-10-14 23:12:05,485 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2019-10-14 23:12:05,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 23:12:05,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:12:05,485 INFO L130 BoogieDeclarations]: Found specification of procedure dll_prepend [2019-10-14 23:12:05,485 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:12:05,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:12:05,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-14 23:12:05,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:12:05,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:12:05,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:12:05,977 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-14 23:12:06,173 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:12:06,174 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:12:06,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:12:06 BoogieIcfgContainer [2019-10-14 23:12:06,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:12:06,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:12:06,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:12:06,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:12:06,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:12:04" (1/3) ... [2019-10-14 23:12:06,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5672693b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:12:06, skipping insertion in model container [2019-10-14 23:12:06,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:05" (2/3) ... [2019-10-14 23:12:06,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5672693b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:12:06, skipping insertion in model container [2019-10-14 23:12:06,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:12:06" (3/3) ... [2019-10-14 23:12:06,184 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2019-10-14 23:12:06,195 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:12:06,203 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:12:06,216 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:12:06,244 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:12:06,244 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:12:06,244 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:12:06,244 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:12:06,245 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:12:06,245 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:12:06,245 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:12:06,245 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:12:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2019-10-14 23:12:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:12:06,270 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:06,271 INFO L380 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] [2019-10-14 23:12:06,273 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:12:06,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:12:06,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1196981672, now seen corresponding path program 1 times [2019-10-14 23:12:06,292 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:12:06,292 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164694921] [2019-10-14 23:12:06,292 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:06,293 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:06,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:12:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:12:06,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164694921] [2019-10-14 23:12:06,719 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:12:06,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:12:06,721 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175807138] [2019-10-14 23:12:06,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:12:06,728 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:12:06,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:12:06,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:12:06,746 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2019-10-14 23:12:06,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:12:06,983 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2019-10-14 23:12:06,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:12:06,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-10-14 23:12:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:12:06,997 INFO L225 Difference]: With dead ends: 93 [2019-10-14 23:12:06,997 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:12:07,001 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:12:07,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:12:07,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2019-10-14 23:12:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 23:12:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-14 23:12:07,046 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2019-10-14 23:12:07,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:12:07,046 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-14 23:12:07,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:12:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-14 23:12:07,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:12:07,048 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:07,048 INFO L380 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] [2019-10-14 23:12:07,048 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:12:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:12:07,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1196990321, now seen corresponding path program 1 times [2019-10-14 23:12:07,049 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:12:07,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201260566] [2019-10-14 23:12:07,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:07,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:07,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:12:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:12:07,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201260566] [2019-10-14 23:12:07,441 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:12:07,441 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-14 23:12:07,441 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36867559] [2019-10-14 23:12:07,444 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:12:07,444 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:12:07,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:12:07,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:12:07,447 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 12 states. [2019-10-14 23:12:07,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:12:07,849 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-10-14 23:12:07,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:12:07,850 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2019-10-14 23:12:07,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:12:07,852 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:12:07,852 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:12:07,854 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:12:07,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:12:07,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2019-10-14 23:12:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:12:07,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-10-14 23:12:07,877 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2019-10-14 23:12:07,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:12:07,877 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-10-14 23:12:07,878 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:12:07,878 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-10-14 23:12:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:12:07,880 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:07,880 INFO L380 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] [2019-10-14 23:12:07,880 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:12:07,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:12:07,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1196988647, now seen corresponding path program 1 times [2019-10-14 23:12:07,881 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:12:07,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216409725] [2019-10-14 23:12:07,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:07,882 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:07,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:12:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:12:08,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216409725] [2019-10-14 23:12:08,058 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:12:08,058 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:12:08,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173176501] [2019-10-14 23:12:08,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:12:08,061 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:12:08,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:12:08,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:12:08,065 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2019-10-14 23:12:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:12:08,314 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-14 23:12:08,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:12:08,321 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-10-14 23:12:08,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:12:08,322 INFO L225 Difference]: With dead ends: 66 [2019-10-14 23:12:08,322 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:12:08,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:12:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:12:08,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2019-10-14 23:12:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 23:12:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-14 23:12:08,335 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2019-10-14 23:12:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:12:08,336 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-14 23:12:08,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:12:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-14 23:12:08,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 23:12:08,341 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:08,342 INFO L380 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] [2019-10-14 23:12:08,342 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:12:08,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:12:08,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1608181309, now seen corresponding path program 1 times [2019-10-14 23:12:08,343 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:12:08,343 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337452906] [2019-10-14 23:12:08,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:08,344 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:08,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:12:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:12:08,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337452906] [2019-10-14 23:12:08,471 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:12:08,472 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:12:08,472 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283753115] [2019-10-14 23:12:08,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:12:08,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:12:08,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:12:08,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:12:08,473 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 5 states. [2019-10-14 23:12:08,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:12:08,628 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2019-10-14 23:12:08,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:12:08,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2019-10-14 23:12:08,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:12:08,630 INFO L225 Difference]: With dead ends: 71 [2019-10-14 23:12:08,630 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:12:08,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:12:08,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:12:08,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 23:12:08,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:12:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-14 23:12:08,645 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2019-10-14 23:12:08,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:12:08,646 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-14 23:12:08,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:12:08,646 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-14 23:12:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 23:12:08,649 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:08,649 INFO L380 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] [2019-10-14 23:12:08,649 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:12:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:12:08,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1474167803, now seen corresponding path program 1 times [2019-10-14 23:12:08,650 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:12:08,650 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414301770] [2019-10-14 23:12:08,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:08,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:08,653 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:12:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:08,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:08,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:12:08,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414301770] [2019-10-14 23:12:08,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510502736] [2019-10-14 23:12:08,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:12:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:08,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:12:08,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:12:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:12:09,025 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:12:09,025 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-10-14 23:12:09,025 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152578824] [2019-10-14 23:12:09,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:12:09,027 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:12:09,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:12:09,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:12:09,027 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 9 states. [2019-10-14 23:12:09,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:12:09,277 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2019-10-14 23:12:09,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:12:09,278 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2019-10-14 23:12:09,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:12:09,279 INFO L225 Difference]: With dead ends: 71 [2019-10-14 23:12:09,279 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:12:09,283 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:12:09,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:12:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2019-10-14 23:12:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:12:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-10-14 23:12:09,294 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 35 [2019-10-14 23:12:09,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:12:09,295 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-10-14 23:12:09,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:12:09,295 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-10-14 23:12:09,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 23:12:09,297 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:09,298 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:12:09,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:12:09,503 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:12:09,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:12:09,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2012412261, now seen corresponding path program 1 times [2019-10-14 23:12:09,504 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:12:09,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361832337] [2019-10-14 23:12:09,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:09,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:09,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:12:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:10,160 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2019-10-14 23:12:10,333 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2019-10-14 23:12:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:12:10,548 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361832337] [2019-10-14 23:12:10,548 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:12:10,548 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2019-10-14 23:12:10,548 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018841117] [2019-10-14 23:12:10,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:12:10,549 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:12:10,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:12:10,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:12:10,550 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 20 states. [2019-10-14 23:12:11,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:12:11,623 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2019-10-14 23:12:11,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:12:11,623 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2019-10-14 23:12:11,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:12:11,625 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:12:11,625 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 23:12:11,627 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:12:11,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 23:12:11,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-10-14 23:12:11,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:12:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-10-14 23:12:11,640 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 40 [2019-10-14 23:12:11,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:12:11,643 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-10-14 23:12:11,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:12:11,643 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-10-14 23:12:11,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:12:11,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:11,646 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:12:11,646 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:12:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:12:11,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1192855508, now seen corresponding path program 1 times [2019-10-14 23:12:11,647 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:12:11,647 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945615104] [2019-10-14 23:12:11,647 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:11,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:11,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:12:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:12,235 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2019-10-14 23:12:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:12:12,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945615104] [2019-10-14 23:12:12,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710888066] [2019-10-14 23:12:12,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:12:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:12,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 89 conjunts are in the unsatisfiable core [2019-10-14 23:12:12,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:12:12,737 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 [2019-10-14 23:12:12,737 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:12,749 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:12,750 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:12:12,750 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-10-14 23:12:12,981 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 9 treesize of output 3 [2019-10-14 23:12:12,982 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:13,011 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:13,017 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 [2019-10-14 23:12:13,017 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:13,026 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:13,026 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.base_BEFORE_CALL_1| vanished before elimination [2019-10-14 23:12:13,027 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. [2019-10-14 23:12:13,027 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:10 [2019-10-14 23:12:13,383 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:12:13,430 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:13,438 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:12:13,492 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:13,493 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-14 23:12:13,493 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:108, output treesize:112 [2019-10-14 23:12:16,228 WARN L191 SmtUtils]: Spent 2.63 s on a formula simplification that was a NOOP. DAG size: 55 [2019-10-14 23:12:16,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:12:21,489 WARN L191 SmtUtils]: Spent 4.98 s on a formula simplification that was a NOOP. DAG size: 61 [2019-10-14 23:12:21,492 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:12:21,549 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 468 treesize of output 464 [2019-10-14 23:12:21,550 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:21,613 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 468 treesize of output 464 [2019-10-14 23:12:21,614 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:21,851 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2019-10-14 23:12:21,852 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:21,853 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 6 dim-0 vars, and 2 xjuncts. [2019-10-14 23:12:21,854 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:937, output treesize:929 [2019-10-14 23:12:22,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:12:22,269 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-14 23:12:22,269 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:22,291 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:22,292 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 485 treesize of output 489 [2019-10-14 23:12:22,293 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:22,327 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:22,334 INFO L392 ElimStorePlain]: Different costs {16=[|v_#memory_$Pointer$.offset_BEFORE_CALL_4|], 52=[|v_old(#memory_$Pointer$.base)_AFTER_CALL_6|]} [2019-10-14 23:12:22,342 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:22,354 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 343 treesize of output 331 [2019-10-14 23:12:22,354 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:22,378 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:22,381 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:22,399 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:22,415 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:22,415 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 63 [2019-10-14 23:12:22,417 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:22,481 INFO L567 ElimStorePlain]: treesize reduction 32, result has 63.6 percent of original size [2019-10-14 23:12:22,483 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:12:22,483 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:971, output treesize:62 [2019-10-14 23:12:22,585 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 15 treesize of output 7 [2019-10-14 23:12:22,586 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:22,598 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:22,599 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:12:22,600 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:62 [2019-10-14 23:12:22,715 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:22,716 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 33 [2019-10-14 23:12:22,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:12:22,718 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:22,720 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:22,720 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:12:22,721 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:4 [2019-10-14 23:12:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:12:22,736 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:12:22,737 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 37 [2019-10-14 23:12:22,737 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705108557] [2019-10-14 23:12:22,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 23:12:22,739 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:12:22,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 23:12:22,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1246, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 23:12:22,740 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 37 states. [2019-10-14 23:12:32,697 WARN L191 SmtUtils]: Spent 5.29 s on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2019-10-14 23:12:45,333 WARN L191 SmtUtils]: Spent 12.33 s on a formula simplification. DAG size of input: 97 DAG size of output: 80 [2019-10-14 23:12:50,688 WARN L191 SmtUtils]: Spent 2.52 s on a formula simplification. DAG size of input: 150 DAG size of output: 125 [2019-10-14 23:12:51,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:12:51,636 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2019-10-14 23:12:51,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:12:51,639 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 42 [2019-10-14 23:12:51,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:12:51,641 INFO L225 Difference]: With dead ends: 93 [2019-10-14 23:12:51,641 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 23:12:51,645 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=266, Invalid=3394, Unknown=0, NotChecked=0, Total=3660 [2019-10-14 23:12:51,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 23:12:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2019-10-14 23:12:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 23:12:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2019-10-14 23:12:51,659 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 42 [2019-10-14 23:12:51,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:12:51,661 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2019-10-14 23:12:51,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 23:12:51,661 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2019-10-14 23:12:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:12:51,665 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:51,665 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]