/usr/bin/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-fb55353 [2019-11-06 21:17:11,321 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:17:11,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:17:11,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:17:11,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:17:11,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:17:11,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:17:11,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:17:11,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:17:11,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:17:11,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:17:11,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:17:11,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:17:11,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:17:11,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:17:11,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:17:11,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:17:11,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:17:11,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:17:11,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:17:11,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:17:11,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:17:11,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:17:11,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:17:11,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 21:17:11,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 21:17:11,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 21:17:11,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 21:17:11,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 21:17:11,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 21:17:11,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 21:17:11,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 21:17:11,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 21:17:11,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 21:17:11,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 21:17:11,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 21:17:11,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 21:17:11,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 21:17:11,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:17:11,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:17:11,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:17:11,375 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 [2019-11-06 21:17:11,389 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:17:11,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:17:11,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:17:11,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:17:11,391 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:17:11,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:17:11,391 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:17:11,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:17:11,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:17:11,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:17:11,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:17:11,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:17:11,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:17:11,393 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:17:11,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:17:11,393 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:17:11,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:17:11,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:17:11,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:17:11,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:17:11,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:17:11,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:17:11,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:17:11,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:17:11,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:17:11,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:17:11,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:17:11,395 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:17:11,396 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:17:11,658 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:17:11,674 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:17:11,679 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:17:11,680 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:17:11,681 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:17:11,681 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2019-11-06 21:17:11,752 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f60ce7ec/e748fdbeb73d4c16be0a4fcc982df019/FLAG769b99cbf [2019-11-06 21:17:12,304 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:17:12,305 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/dll2n_prepend_equal.i [2019-11-06 21:17:12,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f60ce7ec/e748fdbeb73d4c16be0a4fcc982df019/FLAG769b99cbf [2019-11-06 21:17:12,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f60ce7ec/e748fdbeb73d4c16be0a4fcc982df019 [2019-11-06 21:17:12,608 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:17:12,609 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:17:12,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:17:12,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:17:12,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:17:12,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:17:12" (1/1) ... [2019-11-06 21:17:12,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76c75e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:17:12, skipping insertion in model container [2019-11-06 21:17:12,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:17:12" (1/1) ... [2019-11-06 21:17:12,629 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:17:12,688 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:17:13,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:17:13,162 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:17:13,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:17:13,313 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:17:13,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:17:13 WrapperNode [2019-11-06 21:17:13,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:17:13,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:17:13,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:17:13,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:17:13,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:17:13" (1/1) ... [2019-11-06 21:17:13,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:17:13" (1/1) ... [2019-11-06 21:17:13,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:17:13" (1/1) ... [2019-11-06 21:17:13,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:17:13" (1/1) ... [2019-11-06 21:17:13,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:17:13" (1/1) ... [2019-11-06 21:17:13,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:17:13" (1/1) ... [2019-11-06 21:17:13,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:17:13" (1/1) ... [2019-11-06 21:17:13,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:17:13,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:17:13,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:17:13,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:17:13,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:17:13" (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 [2019-11-06 21:17:13,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:17:13,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:17:13,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-06 21:17:13,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-06 21:17:13,450 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-06 21:17:13,450 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-06 21:17:13,451 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2019-11-06 21:17:13,451 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2019-11-06 21:17:13,451 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_prepend [2019-11-06 21:17:13,451 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:17:13,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:17:13,452 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-06 21:17:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-06 21:17:13,453 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-06 21:17:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-06 21:17:13,454 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-06 21:17:13,456 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-06 21:17:13,457 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-06 21:17:13,457 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-06 21:17:13,457 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-06 21:17:13,457 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-06 21:17:13,457 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-06 21:17:13,457 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-06 21:17:13,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-06 21:17:13,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-06 21:17:13,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-06 21:17:13,458 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-06 21:17:13,458 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-06 21:17:13,458 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-06 21:17:13,458 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-06 21:17:13,459 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-06 21:17:13,459 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-06 21:17:13,459 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-06 21:17:13,459 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-06 21:17:13,459 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-06 21:17:13,460 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-06 21:17:13,460 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-06 21:17:13,460 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-06 21:17:13,460 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-06 21:17:13,460 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-06 21:17:13,460 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-06 21:17:13,460 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-06 21:17:13,461 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-06 21:17:13,461 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-06 21:17:13,461 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-06 21:17:13,461 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-06 21:17:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-06 21:17:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-06 21:17:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-06 21:17:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-06 21:17:13,462 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-06 21:17:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-06 21:17:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-06 21:17:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-06 21:17:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-06 21:17:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-06 21:17:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-06 21:17:13,463 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-06 21:17:13,464 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-06 21:17:13,464 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-06 21:17:13,464 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-06 21:17:13,464 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-06 21:17:13,464 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-06 21:17:13,464 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 21:17:13,464 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-06 21:17:13,465 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-06 21:17:13,465 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-06 21:17:13,465 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-06 21:17:13,466 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-06 21:17:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-06 21:17:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-06 21:17:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-06 21:17:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-06 21:17:13,467 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-06 21:17:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-06 21:17:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-06 21:17:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 21:17:13,468 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-06 21:17:13,469 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-06 21:17:13,469 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-06 21:17:13,469 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-06 21:17:13,469 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-06 21:17:13,470 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-06 21:17:13,470 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-06 21:17:13,470 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-06 21:17:13,470 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-06 21:17:13,471 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-06 21:17:13,471 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-06 21:17:13,471 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-06 21:17:13,471 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-06 21:17:13,472 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-06 21:17:13,472 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-06 21:17:13,472 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-06 21:17:13,473 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-06 21:17:13,473 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-06 21:17:13,473 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-06 21:17:13,473 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-06 21:17:13,473 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-06 21:17:13,473 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-06 21:17:13,473 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-06 21:17:13,474 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-06 21:17:13,474 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-06 21:17:13,474 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-06 21:17:13,474 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-06 21:17:13,474 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-06 21:17:13,474 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-06 21:17:13,474 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-06 21:17:13,475 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-06 21:17:13,475 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-06 21:17:13,475 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-06 21:17:13,475 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-06 21:17:13,475 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-06 21:17:13,475 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-06 21:17:13,475 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-06 21:17:13,475 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-06 21:17:13,476 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-06 21:17:13,476 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-06 21:17:13,476 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-06 21:17:13,476 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 21:17:13,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-06 21:17:13,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 21:17:13,477 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2019-11-06 21:17:13,477 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2019-11-06 21:17:13,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-06 21:17:13,478 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 21:17:13,478 INFO L130 BoogieDeclarations]: Found specification of procedure dll_prepend [2019-11-06 21:17:13,478 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:17:13,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 21:17:13,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-06 21:17:13,478 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 21:17:13,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:17:13,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:17:13,873 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-06 21:17:14,065 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:17:14,065 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 21:17:14,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:17:14 BoogieIcfgContainer [2019-11-06 21:17:14,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:17:14,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:17:14,068 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:17:14,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:17:14,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:17:12" (1/3) ... [2019-11-06 21:17:14,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b05924b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:17:14, skipping insertion in model container [2019-11-06 21:17:14,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:17:13" (2/3) ... [2019-11-06 21:17:14,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b05924b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:17:14, skipping insertion in model container [2019-11-06 21:17:14,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:17:14" (3/3) ... [2019-11-06 21:17:14,075 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2019-11-06 21:17:14,086 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:17:14,094 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:17:14,107 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:17:14,132 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:17:14,132 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:17:14,133 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:17:14,133 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:17:14,133 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:17:14,133 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:17:14,134 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:17:14,134 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:17:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2019-11-06 21:17:14,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 21:17:14,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:17:14,162 INFO L410 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] [2019-11-06 21:17:14,164 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:17:14,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:17:14,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1196981672, now seen corresponding path program 1 times [2019-11-06 21:17:14,180 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:17:14,180 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187375080] [2019-11-06 21:17:14,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:17:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:14,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:14,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:17:14,579 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187375080] [2019-11-06 21:17:14,580 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:17:14,580 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 21:17:14,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630541071] [2019-11-06 21:17:14,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:17:14,588 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:17:14,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:17:14,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:17:14,607 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2019-11-06 21:17:14,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:17:14,902 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2019-11-06 21:17:14,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:17:14,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-11-06 21:17:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:17:14,921 INFO L225 Difference]: With dead ends: 93 [2019-11-06 21:17:14,922 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 21:17:14,928 INFO L630 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 [2019-11-06 21:17:14,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 21:17:14,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2019-11-06 21:17:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-06 21:17:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-06 21:17:14,981 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 30 [2019-11-06 21:17:14,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:17:14,982 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-06 21:17:14,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:17:14,982 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-06 21:17:14,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 21:17:14,986 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:17:14,986 INFO L410 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] [2019-11-06 21:17:14,987 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:17:14,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:17:14,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1196990321, now seen corresponding path program 1 times [2019-11-06 21:17:14,987 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:17:14,988 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501071417] [2019-11-06 21:17:14,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:17:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:17:15,370 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501071417] [2019-11-06 21:17:15,370 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:17:15,370 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-06 21:17:15,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782600880] [2019-11-06 21:17:15,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:17:15,372 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:17:15,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:17:15,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:17:15,375 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 12 states. [2019-11-06 21:17:15,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:17:15,755 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-11-06 21:17:15,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:17:15,755 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2019-11-06 21:17:15,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:17:15,757 INFO L225 Difference]: With dead ends: 47 [2019-11-06 21:17:15,758 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 21:17:15,759 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2019-11-06 21:17:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 21:17:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2019-11-06 21:17:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 21:17:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-11-06 21:17:15,782 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 30 [2019-11-06 21:17:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:17:15,782 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-11-06 21:17:15,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 21:17:15,783 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-11-06 21:17:15,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 21:17:15,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:17:15,786 INFO L410 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] [2019-11-06 21:17:15,786 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:17:15,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:17:15,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1196988647, now seen corresponding path program 1 times [2019-11-06 21:17:15,787 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:17:15,787 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127603670] [2019-11-06 21:17:15,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:17:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:17:15,951 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127603670] [2019-11-06 21:17:15,952 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:17:15,952 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 21:17:15,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512608738] [2019-11-06 21:17:15,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:17:15,954 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:17:15,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:17:15,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:17:15,955 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2019-11-06 21:17:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:17:16,171 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-11-06 21:17:16,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:17:16,171 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2019-11-06 21:17:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:17:16,173 INFO L225 Difference]: With dead ends: 66 [2019-11-06 21:17:16,173 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 21:17:16,174 INFO L630 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 [2019-11-06 21:17:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 21:17:16,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2019-11-06 21:17:16,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-06 21:17:16,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-11-06 21:17:16,181 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2019-11-06 21:17:16,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:17:16,181 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-11-06 21:17:16,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:17:16,181 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-11-06 21:17:16,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 21:17:16,183 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:17:16,183 INFO L410 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] [2019-11-06 21:17:16,183 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:17:16,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:17:16,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1608181309, now seen corresponding path program 1 times [2019-11-06 21:17:16,184 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:17:16,184 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340707217] [2019-11-06 21:17:16,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:17:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:17:16,297 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340707217] [2019-11-06 21:17:16,297 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:17:16,297 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 21:17:16,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145666470] [2019-11-06 21:17:16,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:17:16,298 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:17:16,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:17:16,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:17:16,299 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 5 states. [2019-11-06 21:17:16,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:17:16,459 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2019-11-06 21:17:16,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:17:16,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2019-11-06 21:17:16,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:17:16,460 INFO L225 Difference]: With dead ends: 71 [2019-11-06 21:17:16,460 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 21:17:16,461 INFO L630 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 [2019-11-06 21:17:16,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 21:17:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 21:17:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 21:17:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 21:17:16,473 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2019-11-06 21:17:16,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:17:16,474 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 21:17:16,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:17:16,474 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 21:17:16,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 21:17:16,477 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:17:16,477 INFO L410 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] [2019-11-06 21:17:16,477 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:17:16,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:17:16,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1474167803, now seen corresponding path program 1 times [2019-11-06 21:17:16,478 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:17:16,478 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546237932] [2019-11-06 21:17:16,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:17:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:17:16,652 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546237932] [2019-11-06 21:17:16,652 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999491790] [2019-11-06 21:17:16,652 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 [2019-11-06 21:17:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:16,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 21:17:16,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:17:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:17:16,852 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:17:16,852 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-11-06 21:17:16,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370608777] [2019-11-06 21:17:16,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:17:16,854 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:17:16,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:17:16,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:17:16,854 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 9 states. [2019-11-06 21:17:17,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:17:17,053 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2019-11-06 21:17:17,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:17:17,053 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2019-11-06 21:17:17,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:17:17,054 INFO L225 Difference]: With dead ends: 71 [2019-11-06 21:17:17,054 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 21:17:17,055 INFO L630 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 [2019-11-06 21:17:17,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 21:17:17,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2019-11-06 21:17:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 21:17:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-11-06 21:17:17,069 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 35 [2019-11-06 21:17:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:17:17,069 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-11-06 21:17:17,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:17:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-11-06 21:17:17,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 21:17:17,072 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:17:17,072 INFO L410 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] [2019-11-06 21:17:17,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:17:17,279 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:17:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:17:17,279 INFO L82 PathProgramCache]: Analyzing trace with hash -2012412261, now seen corresponding path program 1 times [2019-11-06 21:17:17,279 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:17:17,279 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920079592] [2019-11-06 21:17:17,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:17:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:17,999 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2019-11-06 21:17:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:17:18,365 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920079592] [2019-11-06 21:17:18,365 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:17:18,366 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2019-11-06 21:17:18,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102073107] [2019-11-06 21:17:18,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 21:17:18,366 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:17:18,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 21:17:18,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2019-11-06 21:17:18,369 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 20 states. [2019-11-06 21:17:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:17:19,454 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2019-11-06 21:17:19,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 21:17:19,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2019-11-06 21:17:19,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:17:19,455 INFO L225 Difference]: With dead ends: 47 [2019-11-06 21:17:19,456 INFO L226 Difference]: Without dead ends: 45 [2019-11-06 21:17:19,457 INFO L630 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 [2019-11-06 21:17:19,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-06 21:17:19,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-06 21:17:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 21:17:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-11-06 21:17:19,463 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 40 [2019-11-06 21:17:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:17:19,463 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-11-06 21:17:19,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 21:17:19,464 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-11-06 21:17:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 21:17:19,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:17:19,465 INFO L410 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] [2019-11-06 21:17:19,465 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:17:19,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:17:19,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1192855508, now seen corresponding path program 1 times [2019-11-06 21:17:19,466 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:17:19,466 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299578887] [2019-11-06 21:17:19,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:17:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:19,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:20,062 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2019-11-06 21:17:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:17:20,362 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299578887] [2019-11-06 21:17:20,362 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204505845] [2019-11-06 21:17:20,362 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 [2019-11-06 21:17:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:17:20,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 89 conjunts are in the unsatisfiable core [2019-11-06 21:17:20,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:17:20,589 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 [2019-11-06 21:17:20,589 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:17:20,609 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:17:20,609 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:17:20,609 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-06 21:17:20,808 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 [2019-11-06 21:17:20,809 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:17:20,817 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:17:20,822 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 [2019-11-06 21:17:20,822 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:17:20,829 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:17:20,829 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_$Pointer$.base_BEFORE_CALL_1| vanished before elimination [2019-11-06 21:17:20,830 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. [2019-11-06 21:17:20,830 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:10 [2019-11-06 21:17:21,180 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:17:21,221 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:17:21,228 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:17:21,261 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:17:21,262 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-06 21:17:21,263 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:108, output treesize:112 [2019-11-06 21:17:24,024 WARN L191 SmtUtils]: Spent 2.66 s on a formula simplification that was a NOOP. DAG size: 55 [2019-11-06 21:17:24,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:17:34,796 WARN L191 SmtUtils]: Spent 10.50 s on a formula simplification that was a NOOP. DAG size: 61 [2019-11-06 21:17:34,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:17:34,893 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 [2019-11-06 21:17:34,894 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:17:34,938 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 [2019-11-06 21:17:34,939 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:17:35,120 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2019-11-06 21:17:35,121 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:17:35,122 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. [2019-11-06 21:17:35,123 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:937, output treesize:929 [2019-11-06 21:17:35,520 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:17:35,544 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-11-06 21:17:35,544 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:17:35,565 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:17:35,566 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 [2019-11-06 21:17:35,567 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:17:35,599 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:17:35,604 INFO L392 ElimStorePlain]: Different costs {16=[|v_#memory_$Pointer$.offset_BEFORE_CALL_4|], 52=[|v_old(#memory_$Pointer$.base)_AFTER_CALL_6|]} [2019-11-06 21:17:35,614 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 21:17:35,619 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 [2019-11-06 21:17:35,619 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-06 21:17:35,644 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:17:35,646 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 21:17:35,652 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 21:17:35,668 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:17:35,668 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 [2019-11-06 21:17:35,669 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-06 21:17:35,730 INFO L567 ElimStorePlain]: treesize reduction 32, result has 63.6 percent of original size [2019-11-06 21:17:35,731 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. [2019-11-06 21:17:35,731 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 9 variables, input treesize:971, output treesize:62 [2019-11-06 21:17:35,833 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 [2019-11-06 21:17:35,833 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:17:35,845 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:17:35,846 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. [2019-11-06 21:17:35,846 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:73, output treesize:62 [2019-11-06 21:17:35,955 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:17:35,955 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 [2019-11-06 21:17:35,956 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:17:35,957 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:17:35,958 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:17:35,958 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:17:35,958 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:63, output treesize:4 [2019-11-06 21:17:35,972 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:17:35,972 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:17:35,972 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 37 [2019-11-06 21:17:35,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077548651] [2019-11-06 21:17:35,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-06 21:17:35,975 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:17:35,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-06 21:17:35,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1246, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 21:17:35,976 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 37 states. [2019-11-06 21:17:45,359 WARN L191 SmtUtils]: Spent 7.29 s on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2019-11-06 21:17:54,077 WARN L191 SmtUtils]: Spent 8.42 s on a formula simplification. DAG size of input: 97 DAG size of output: 80