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_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:12:09,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:12:09,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:12:09,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:12:09,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:12:09,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:12:09,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:12:09,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:12:09,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:12:09,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:12:09,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:12:09,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:12:09,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:12:09,315 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:12:09,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:12:09,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:12:09,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:12:09,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:12:09,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:12:09,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:12:09,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:12:09,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:12:09,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:12:09,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:12:09,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:12:09,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:12:09,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:12:09,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:12:09,342 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:12:09,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:12:09,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:12:09,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:12:09,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:12:09,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:12:09,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:12:09,348 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:12:09,349 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:12:09,349 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:12:09,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:12:09,350 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:12:09,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:12:09,353 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 23:12:09,385 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:12:09,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:12:09,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:12:09,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:12:09,392 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:12:09,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:12:09,392 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:12:09,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:12:09,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:12:09,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:12:09,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:12:09,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:12:09,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:12:09,397 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:12:09,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:12:09,397 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:12:09,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:12:09,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:12:09,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:12:09,398 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:12:09,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:12:09,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:12:09,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:12:09,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:12:09,401 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:12:09,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:12:09,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:12:09,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:12:09,402 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:12:09,707 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:12:09,725 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:12:09,728 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:12:09,729 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:12:09,730 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:12:09,730 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_prepend_unequal.i [2019-10-14 23:12:09,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/727f478f6/66ae4a42fae5438c813e61857d8722a4/FLAG208e33e70 [2019-10-14 23:12:10,382 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:12:10,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_prepend_unequal.i [2019-10-14 23:12:10,403 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/727f478f6/66ae4a42fae5438c813e61857d8722a4/FLAG208e33e70 [2019-10-14 23:12:10,686 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/727f478f6/66ae4a42fae5438c813e61857d8722a4 [2019-10-14 23:12:10,694 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:12:10,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:12:10,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:12:10,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:12:10,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:12:10,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:12:10" (1/1) ... [2019-10-14 23:12:10,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c6fc6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:10, skipping insertion in model container [2019-10-14 23:12:10,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:12:10" (1/1) ... [2019-10-14 23:12:10,714 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:12:10,768 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:12:11,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:12:11,198 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:12:11,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:12:11,328 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:12:11,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:11 WrapperNode [2019-10-14 23:12:11,329 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:12:11,330 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:12:11,330 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:12:11,330 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:12:11,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:11" (1/1) ... [2019-10-14 23:12:11,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:11" (1/1) ... [2019-10-14 23:12:11,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:11" (1/1) ... [2019-10-14 23:12:11,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:11" (1/1) ... [2019-10-14 23:12:11,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:11" (1/1) ... [2019-10-14 23:12:11,388 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:11" (1/1) ... [2019-10-14 23:12:11,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:11" (1/1) ... [2019-10-14 23:12:11,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:12:11,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:12:11,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:12:11,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:12:11,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:11" (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 23:12:11,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:12:11,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:12:11,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-14 23:12:11,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-14 23:12:11,454 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-14 23:12:11,455 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-10-14 23:12:11,455 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2019-10-14 23:12:11,455 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2019-10-14 23:12:11,455 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_prepend [2019-10-14 23:12:11,455 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:12:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:12:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-14 23:12:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-14 23:12:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-14 23:12:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-14 23:12:11,456 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-14 23:12:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-14 23:12:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-14 23:12:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-14 23:12:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-14 23:12:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-14 23:12:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-14 23:12:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-14 23:12:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-14 23:12:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-14 23:12:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-14 23:12:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-14 23:12:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-14 23:12:11,459 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-14 23:12:11,459 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-14 23:12:11,459 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-14 23:12:11,459 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-14 23:12:11,459 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-14 23:12:11,459 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-14 23:12:11,460 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-14 23:12:11,460 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-14 23:12:11,460 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-14 23:12:11,460 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-14 23:12:11,460 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-14 23:12:11,460 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-14 23:12:11,461 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-14 23:12:11,461 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-14 23:12:11,461 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-14 23:12:11,461 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-14 23:12:11,461 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-14 23:12:11,462 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-14 23:12:11,462 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-14 23:12:11,462 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-14 23:12:11,462 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-14 23:12:11,462 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-14 23:12:11,462 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-14 23:12:11,462 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-14 23:12:11,462 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-14 23:12:11,462 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-14 23:12:11,463 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-14 23:12:11,463 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-14 23:12:11,463 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-14 23:12:11,463 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-14 23:12:11,463 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-14 23:12:11,463 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-14 23:12:11,463 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-14 23:12:11,463 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-14 23:12:11,463 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-14 23:12:11,463 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:12:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-14 23:12:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-14 23:12:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-14 23:12:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-14 23:12:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-14 23:12:11,464 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-14 23:12:11,465 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-14 23:12:11,465 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-14 23:12:11,465 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-14 23:12:11,465 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-14 23:12:11,465 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-14 23:12:11,465 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-14 23:12:11,465 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:12:11,466 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-14 23:12:11,466 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-14 23:12:11,466 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-14 23:12:11,466 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-14 23:12:11,466 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-14 23:12:11,466 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-14 23:12:11,467 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-14 23:12:11,467 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-14 23:12:11,467 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-14 23:12:11,467 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-14 23:12:11,467 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-14 23:12:11,467 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-14 23:12:11,468 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-14 23:12:11,468 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-14 23:12:11,468 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-14 23:12:11,468 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-14 23:12:11,468 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-14 23:12:11,468 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-14 23:12:11,469 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-14 23:12:11,469 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-14 23:12:11,469 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-14 23:12:11,469 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-14 23:12:11,469 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-14 23:12:11,469 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-14 23:12:11,469 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-14 23:12:11,469 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-14 23:12:11,470 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-14 23:12:11,470 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-14 23:12:11,470 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-14 23:12:11,470 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-14 23:12:11,470 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-14 23:12:11,470 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-14 23:12:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-14 23:12:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-14 23:12:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-14 23:12:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-14 23:12:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-14 23:12:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-14 23:12:11,471 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-14 23:12:11,472 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-14 23:12:11,472 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-10-14 23:12:11,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 23:12:11,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 23:12:11,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:12:11,472 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2019-10-14 23:12:11,472 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2019-10-14 23:12:11,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 23:12:11,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:12:11,473 INFO L130 BoogieDeclarations]: Found specification of procedure dll_prepend [2019-10-14 23:12:11,473 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:12:11,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:12:11,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-14 23:12:11,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:12:11,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:12:11,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:12:11,912 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-14 23:12:12,115 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:12:12,116 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:12:12,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:12:12 BoogieIcfgContainer [2019-10-14 23:12:12,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:12:12,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:12:12,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:12:12,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:12:12,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:12:10" (1/3) ... [2019-10-14 23:12:12,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710fdd64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:12:12, skipping insertion in model container [2019-10-14 23:12:12,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:12:11" (2/3) ... [2019-10-14 23:12:12,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@710fdd64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:12:12, skipping insertion in model container [2019-10-14 23:12:12,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:12:12" (3/3) ... [2019-10-14 23:12:12,126 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_unequal.i [2019-10-14 23:12:12,136 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:12:12,144 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:12:12,156 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:12:12,178 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:12:12,178 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:12:12,178 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:12:12,179 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:12:12,179 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:12:12,180 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:12:12,180 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:12:12,180 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:12:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2019-10-14 23:12:12,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 23:12:12,208 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:12,209 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] [2019-10-14 23:12:12,211 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:12:12,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:12:12,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1640491568, now seen corresponding path program 1 times [2019-10-14 23:12:12,224 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:12:12,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026811113] [2019-10-14 23:12:12,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:12,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:12,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:12:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:12,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:12,575 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 23:12:12,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026811113] [2019-10-14 23:12:12,577 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:12:12,578 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:12:12,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294299309] [2019-10-14 23:12:12,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:12:12,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:12:12,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:12:12,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:12:12,601 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 4 states. [2019-10-14 23:12:12,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:12:12,849 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2019-10-14 23:12:12,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:12:12,851 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-14 23:12:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:12:12,862 INFO L225 Difference]: With dead ends: 95 [2019-10-14 23:12:12,862 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:12:12,869 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:12:12,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:12:12,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2019-10-14 23:12:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:12:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2019-10-14 23:12:12,915 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 29 [2019-10-14 23:12:12,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:12:12,916 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2019-10-14 23:12:12,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:12:12,916 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2019-10-14 23:12:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 23:12:12,918 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:12,918 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] [2019-10-14 23:12:12,919 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:12:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:12:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1361191619, now seen corresponding path program 1 times [2019-10-14 23:12:12,920 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:12:12,922 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572608916] [2019-10-14 23:12:12,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:12,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:12,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:12:13,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,149 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 23:12:13,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572608916] [2019-10-14 23:12:13,149 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:12:13,150 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:12:13,150 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715745962] [2019-10-14 23:12:13,152 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:12:13,152 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:12:13,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:12:13,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:12:13,153 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2019-10-14 23:12:13,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:12:13,381 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2019-10-14 23:12:13,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:12:13,381 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2019-10-14 23:12:13,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:12:13,383 INFO L225 Difference]: With dead ends: 66 [2019-10-14 23:12:13,383 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:12:13,384 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 23:12:13,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:12:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2019-10-14 23:12:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 23:12:13,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2019-10-14 23:12:13,395 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 29 [2019-10-14 23:12:13,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:12:13,397 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2019-10-14 23:12:13,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:12:13,397 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2019-10-14 23:12:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:12:13,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:13,399 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] [2019-10-14 23:12:13,399 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:12:13,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:12:13,400 INFO L82 PathProgramCache]: Analyzing trace with hash -417804790, now seen corresponding path program 1 times [2019-10-14 23:12:13,400 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:12:13,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954927480] [2019-10-14 23:12:13,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:13,401 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:13,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:12:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,544 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 23:12:13,544 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954927480] [2019-10-14 23:12:13,545 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:12:13,545 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:12:13,545 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363505344] [2019-10-14 23:12:13,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:12:13,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:12:13,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:12:13,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:12:13,547 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 5 states. [2019-10-14 23:12:13,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:12:13,702 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2019-10-14 23:12:13,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:12:13,703 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2019-10-14 23:12:13,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:12:13,704 INFO L225 Difference]: With dead ends: 71 [2019-10-14 23:12:13,704 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:12:13,705 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 23:12:13,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:12:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 23:12:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:12:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-10-14 23:12:13,713 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 34 [2019-10-14 23:12:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:12:13,713 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-10-14 23:12:13,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:12:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-10-14 23:12:13,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:12:13,715 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:13,715 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] [2019-10-14 23:12:13,715 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:12:13,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:12:13,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2071724172, now seen corresponding path program 1 times [2019-10-14 23:12:13,716 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:12:13,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003934483] [2019-10-14 23:12:13,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:13,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:13,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:12:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:13,885 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 23:12:13,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003934483] [2019-10-14 23:12:13,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764471372] [2019-10-14 23:12:13,886 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 23:12:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:14,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:12:14,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:12:14,130 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 23:12:14,131 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:12:14,131 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-10-14 23:12:14,131 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759792892] [2019-10-14 23:12:14,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:12:14,132 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:12:14,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:12:14,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:12:14,133 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 9 states. [2019-10-14 23:12:14,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:12:14,359 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2019-10-14 23:12:14,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:12:14,360 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-10-14 23:12:14,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:12:14,361 INFO L225 Difference]: With dead ends: 71 [2019-10-14 23:12:14,362 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:12:14,364 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 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 23:12:14,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:12:14,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2019-10-14 23:12:14,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:12:14,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2019-10-14 23:12:14,375 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 34 [2019-10-14 23:12:14,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:12:14,375 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2019-10-14 23:12:14,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:12:14,376 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2019-10-14 23:12:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:12:14,379 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:14,379 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] [2019-10-14 23:12:14,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:12:14,583 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:12:14,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:12:14,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1918409701, now seen corresponding path program 1 times [2019-10-14 23:12:14,584 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:12:14,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4620975] [2019-10-14 23:12:14,585 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:14,585 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:14,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:12:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:15,334 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2019-10-14 23:12:15,478 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2019-10-14 23:12:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:15,648 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 23:12:15,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4620975] [2019-10-14 23:12:15,649 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:12:15,649 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2019-10-14 23:12:15,649 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234626678] [2019-10-14 23:12:15,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:12:15,650 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:12:15,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:12:15,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:12:15,651 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 19 states. [2019-10-14 23:12:16,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:12:16,671 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2019-10-14 23:12:16,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:12:16,672 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2019-10-14 23:12:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:12:16,673 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:12:16,673 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:12:16,674 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:12:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:12:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-10-14 23:12:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:12:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-10-14 23:12:16,681 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39 [2019-10-14 23:12:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:12:16,681 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-10-14 23:12:16,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:12:16,681 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-10-14 23:12:16,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 23:12:16,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:16,683 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] [2019-10-14 23:12:16,683 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:12:16,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:12:16,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1050708404, now seen corresponding path program 1 times [2019-10-14 23:12:16,684 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:12:16,684 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438080801] [2019-10-14 23:12:16,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:16,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:16,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:12:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:17,361 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2019-10-14 23:12:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:17,732 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 23:12:17,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438080801] [2019-10-14 23:12:17,736 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:12:17,737 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2019-10-14 23:12:17,737 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731165118] [2019-10-14 23:12:17,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:12:17,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:12:17,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:12:17,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:12:17,740 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 20 states. [2019-10-14 23:12:18,608 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2019-10-14 23:12:18,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:12:18,902 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2019-10-14 23:12:18,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:12:18,903 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2019-10-14 23:12:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:12:18,905 INFO L225 Difference]: With dead ends: 76 [2019-10-14 23:12:18,905 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:12:18,908 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:12:18,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:12:18,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-10-14 23:12:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:12:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2019-10-14 23:12:18,914 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 41 [2019-10-14 23:12:18,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:12:18,915 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2019-10-14 23:12:18,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:12:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2019-10-14 23:12:18,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 23:12:18,916 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:12:18,916 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] [2019-10-14 23:12:18,917 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:12:18,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:12:18,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1050706730, now seen corresponding path program 1 times [2019-10-14 23:12:18,917 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:12:18,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459983140] [2019-10-14 23:12:18,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:18,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:12:18,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:12:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:19,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:20,184 WARN L191 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2019-10-14 23:12:20,530 WARN L191 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2019-10-14 23:12:20,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:21,167 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2019-10-14 23:12:21,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:12:21,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459983140] [2019-10-14 23:12:21,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665680445] [2019-10-14 23:12:21,184 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 23:12:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:12:21,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 105 conjunts are in the unsatisfiable core [2019-10-14 23:12:21,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:12:21,429 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 23:12:21,429 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:21,446 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:21,447 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:12:21,447 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-10-14 23:12:21,471 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:21,472 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2019-10-14 23:12:21,473 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:21,498 INFO L567 ElimStorePlain]: treesize reduction 14, result has 63.2 percent of original size [2019-10-14 23:12:21,499 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:12:21,499 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:24 [2019-10-14 23:12:21,562 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_int_33|], 2=[|v_#memory_int_30|]} [2019-10-14 23:12:21,566 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:21,571 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2019-10-14 23:12:21,571 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:21,587 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:21,592 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:21,593 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 27 treesize of output 11 [2019-10-14 23:12:21,594 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:21,605 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:21,606 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:12:21,606 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:62, output treesize:28 [2019-10-14 23:12:21,681 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 27 treesize of output 11 [2019-10-14 23:12:21,681 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:21,693 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:21,694 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:12:21,694 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:28 [2019-10-14 23:12:22,118 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 23:12:22,119 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:22,135 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:22,152 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 23:12:22,152 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:22,169 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:22,174 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 27 treesize of output 15 [2019-10-14 23:12:22,175 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 23:12:22,189 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:22,194 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2019-10-14 23:12:22,194 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:22,206 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:22,207 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:12:22,208 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:63, output treesize:13 [2019-10-14 23:12:22,387 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 23:12:22,419 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:22,423 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 23:12:22,445 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:22,446 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-10-14 23:12:22,447 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:108, output treesize:80 [2019-10-14 23:12:26,560 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 46 [2019-10-14 23:12:30,731 WARN L191 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 52 [2019-10-14 23:12:30,747 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 23:12:30,812 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:30,816 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 23:12:30,863 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:30,864 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: 6 dim-0 vars, and 1 xjuncts. [2019-10-14 23:12:30,865 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:131, output treesize:143 [2019-10-14 23:12:33,038 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 63 [2019-10-14 23:12:33,054 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 23:12:33,171 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2019-10-14 23:12:33,171 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:33,172 INFO L496 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: 7 dim-0 vars, and 1 xjuncts. [2019-10-14 23:12:33,173 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:811, output treesize:825 [2019-10-14 23:12:37,509 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 23:12:37,643 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2019-10-14 23:12:37,643 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:37,644 INFO L496 ElimStorePlain]: Start of recursive call 1: 9 dim-0 vars, 1 dim-2 vars, End of recursive call: 10 dim-0 vars, and 1 xjuncts. [2019-10-14 23:12:37,644 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 10 variables, input treesize:1344, output treesize:1440 [2019-10-14 23:12:54,618 WARN L191 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2019-10-14 23:12:54,770 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:54,771 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 30 [2019-10-14 23:12:54,772 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:55,052 WARN L191 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2019-10-14 23:12:55,053 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:55,059 INFO L392 ElimStorePlain]: Different costs {12=[|v_#memory_int_BEFORE_CALL_4|], 33=[|v_#memory_$Pointer$.offset_BEFORE_CALL_4|, |v_old(#memory_$Pointer$.base)_AFTER_CALL_6|]} [2019-10-14 23:12:55,104 INFO L172 IndexEqualityManager]: detected equality via solver [2019-10-14 23:12:55,110 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:55,135 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:55,152 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:55,162 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:55,186 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:55,193 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:55,222 INFO L235 Elim1Store]: Index analysis took 119 ms [2019-10-14 23:12:55,266 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:12:55,267 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 433 treesize of output 228 [2019-10-14 23:12:55,269 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:56,205 WARN L191 SmtUtils]: Spent 935.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 102 [2019-10-14 23:12:56,205 INFO L567 ElimStorePlain]: treesize reduction 50, result has 96.1 percent of original size [2019-10-14 23:12:56,212 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:56,220 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:56,221 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:56,222 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:56,224 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:56,487 WARN L191 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2019-10-14 23:12:56,488 INFO L341 Elim1Store]: treesize reduction 665, result has 34.1 percent of original size [2019-10-14 23:12:56,489 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 828 treesize of output 824 [2019-10-14 23:12:56,491 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 23:12:56,968 WARN L191 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 95 [2019-10-14 23:12:56,968 INFO L567 ElimStorePlain]: treesize reduction 247, result has 73.1 percent of original size [2019-10-14 23:12:56,971 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:56,982 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:56,984 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:56,985 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 23:12:56,987 INFO L189 IndexEqualityManager]: detected not equals via solver