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-ext3-properties/sll_length_check-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:11:01,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:11:01,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:11:01,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:11:01,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:11:01,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:11:01,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:11:01,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:11:01,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:11:01,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:11:01,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:11:01,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:11:01,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:11:01,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:11:01,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:11:01,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:11:01,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:11:01,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:11:01,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:11:01,295 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:11:01,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:11:01,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:11:01,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:11:01,301 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:11:01,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:11:01,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:11:01,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:11:01,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:11:01,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:11:01,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:11:01,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:11:01,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:11:01,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:11:01,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:11:01,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:11:01,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:11:01,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:11:01,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:11:01,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:11:01,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:11:01,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:11:01,316 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 23:11:01,329 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:11:01,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:11:01,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:11:01,331 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:11:01,331 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:11:01,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:11:01,331 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:11:01,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:11:01,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:11:01,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:11:01,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:11:01,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:11:01,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:11:01,333 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:11:01,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:11:01,333 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:11:01,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:11:01,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:11:01,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:11:01,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:11:01,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:11:01,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:11:01,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:11:01,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:11:01,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:11:01,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:11:01,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:11:01,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:11:01,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:11:01,633 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:11:01,646 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:11:01,650 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:11:01,651 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:11:01,651 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:11:01,652 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2019-10-14 23:11:01,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0136cb26d/7fc7c5879c6446bb9aa49a35732ef370/FLAGe51898120 [2019-10-14 23:11:02,205 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:11:02,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2019-10-14 23:11:02,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0136cb26d/7fc7c5879c6446bb9aa49a35732ef370/FLAGe51898120 [2019-10-14 23:11:02,530 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0136cb26d/7fc7c5879c6446bb9aa49a35732ef370 [2019-10-14 23:11:02,542 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:11:02,543 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:11:02,544 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:11:02,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:11:02,548 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:11:02,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:11:02" (1/1) ... [2019-10-14 23:11:02,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f2b4d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:02, skipping insertion in model container [2019-10-14 23:11:02,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:11:02" (1/1) ... [2019-10-14 23:11:02,560 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:11:02,611 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:11:03,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:11:03,078 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:11:03,124 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:11:03,181 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:11:03,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:03 WrapperNode [2019-10-14 23:11:03,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:11:03,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:11:03,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:11:03,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:11:03,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:03" (1/1) ... [2019-10-14 23:11:03,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:03" (1/1) ... [2019-10-14 23:11:03,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:03" (1/1) ... [2019-10-14 23:11:03,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:03" (1/1) ... [2019-10-14 23:11:03,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:03" (1/1) ... [2019-10-14 23:11:03,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:03" (1/1) ... [2019-10-14 23:11:03,235 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:03" (1/1) ... [2019-10-14 23:11:03,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:11:03,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:11:03,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:11:03,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:11:03,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:03" (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 23:11:03,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:11:03,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:11:03,301 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-14 23:11:03,301 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-14 23:11:03,302 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-14 23:11:03,302 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-10-14 23:11:03,302 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2019-10-14 23:11:03,302 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-10-14 23:11:03,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:11:03,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:11:03,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:11:03,303 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-14 23:11:03,303 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-14 23:11:03,303 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-14 23:11:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-14 23:11:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-14 23:11:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-14 23:11:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-14 23:11:03,304 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-14 23:11:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-14 23:11:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-14 23:11:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-14 23:11:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-14 23:11:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-14 23:11:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-14 23:11:03,305 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-14 23:11:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-14 23:11:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-14 23:11:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-14 23:11:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-14 23:11:03,306 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-14 23:11:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-14 23:11:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-14 23:11:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-14 23:11:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-14 23:11:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-14 23:11:03,307 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-14 23:11:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-14 23:11:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-14 23:11:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-14 23:11:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-14 23:11:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-14 23:11:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-14 23:11:03,308 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-14 23:11:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-14 23:11:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-14 23:11:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-14 23:11:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-14 23:11:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-14 23:11:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-14 23:11:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-14 23:11:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-14 23:11:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-14 23:11:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-14 23:11:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-14 23:11:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-14 23:11:03,310 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-14 23:11:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-14 23:11:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-14 23:11:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-14 23:11:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-14 23:11:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-14 23:11:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-14 23:11:03,311 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:11:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-14 23:11:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-14 23:11:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-14 23:11:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-14 23:11:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-14 23:11:03,312 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-14 23:11:03,313 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-14 23:11:03,313 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-14 23:11:03,313 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-14 23:11:03,313 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-14 23:11:03,313 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-14 23:11:03,313 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-14 23:11:03,314 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:11:03,314 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-14 23:11:03,314 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-14 23:11:03,314 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-14 23:11:03,314 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-14 23:11:03,314 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-14 23:11:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-14 23:11:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-14 23:11:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-14 23:11:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-14 23:11:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-14 23:11:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-14 23:11:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-14 23:11:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-14 23:11:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-14 23:11:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-14 23:11:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-14 23:11:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-14 23:11:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-14 23:11:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-14 23:11:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-14 23:11:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-14 23:11:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-14 23:11:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-14 23:11:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-14 23:11:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-14 23:11:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-14 23:11:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-14 23:11:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-14 23:11:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-14 23:11:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-14 23:11:03,318 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-14 23:11:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-14 23:11:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-14 23:11:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-14 23:11:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-14 23:11:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-14 23:11:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-14 23:11:03,319 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-14 23:11:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-14 23:11:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-14 23:11:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-10-14 23:11:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 23:11:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 23:11:03,320 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2019-10-14 23:11:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 23:11:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-10-14 23:11:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:11:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:11:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:11:03,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:11:03,715 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-14 23:11:03,861 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:11:03,862 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 23:11:03,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:11:03 BoogieIcfgContainer [2019-10-14 23:11:03,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:11:03,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:11:03,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:11:03,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:11:03,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:11:02" (1/3) ... [2019-10-14 23:11:03,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fe56d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:11:03, skipping insertion in model container [2019-10-14 23:11:03,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:03" (2/3) ... [2019-10-14 23:11:03,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17fe56d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:11:03, skipping insertion in model container [2019-10-14 23:11:03,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:11:03" (3/3) ... [2019-10-14 23:11:03,872 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2019-10-14 23:11:03,882 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:11:03,890 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:11:03,902 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:11:03,922 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:11:03,922 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:11:03,923 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:11:03,923 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:11:03,923 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:11:03,923 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:11:03,924 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:11:03,924 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:11:03,941 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2019-10-14 23:11:03,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:11:03,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:03,948 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] [2019-10-14 23:11:03,950 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:03,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:03,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1666427650, now seen corresponding path program 1 times [2019-10-14 23:11:03,964 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:03,964 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470160963] [2019-10-14 23:11:03,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:03,965 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:03,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:04,179 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 23:11:04,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470160963] [2019-10-14 23:11:04,181 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:11:04,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:11:04,181 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957362515] [2019-10-14 23:11:04,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:11:04,187 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:04,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:11:04,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:11:04,207 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 4 states. [2019-10-14 23:11:04,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:04,460 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2019-10-14 23:11:04,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:11:04,462 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-14 23:11:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:04,470 INFO L225 Difference]: With dead ends: 90 [2019-10-14 23:11:04,471 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:11:04,474 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:11:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:11:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2019-10-14 23:11:04,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:11:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-10-14 23:11:04,519 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2019-10-14 23:11:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:04,519 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-10-14 23:11:04,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:11:04,520 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-10-14 23:11:04,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 23:11:04,521 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:04,521 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] [2019-10-14 23:11:04,521 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:04,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash -29727073, now seen corresponding path program 1 times [2019-10-14 23:11:04,522 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:04,522 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954213670] [2019-10-14 23:11:04,523 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:04,523 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:04,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:04,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:04,721 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 23:11:04,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954213670] [2019-10-14 23:11:04,722 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:11:04,722 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:11:04,723 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114299393] [2019-10-14 23:11:04,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:11:04,725 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:04,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:11:04,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:11:04,727 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2019-10-14 23:11:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:04,928 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2019-10-14 23:11:04,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:11:04,928 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-10-14 23:11:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:04,929 INFO L225 Difference]: With dead ends: 45 [2019-10-14 23:11:04,930 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:11:04,931 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:11:04,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:11:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-10-14 23:11:04,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:11:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-14 23:11:04,938 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2019-10-14 23:11:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:04,939 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-14 23:11:04,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:11:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-14 23:11:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:11:04,940 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:04,940 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] [2019-10-14 23:11:04,941 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:04,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:04,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1680455870, now seen corresponding path program 1 times [2019-10-14 23:11:04,941 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:04,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232441034] [2019-10-14 23:11:04,942 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:04,942 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:04,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:05,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:05,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:05,237 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 23:11:05,237 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232441034] [2019-10-14 23:11:05,237 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:11:05,238 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-14 23:11:05,238 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155732257] [2019-10-14 23:11:05,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:11:05,239 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:05,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:11:05,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:11:05,240 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 12 states. [2019-10-14 23:11:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:05,603 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-10-14 23:11:05,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:11:05,604 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2019-10-14 23:11:05,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:05,605 INFO L225 Difference]: With dead ends: 39 [2019-10-14 23:11:05,606 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:11:05,606 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:11:05,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:11:05,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-10-14 23:11:05,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:11:05,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-10-14 23:11:05,614 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 28 [2019-10-14 23:11:05,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:05,614 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-10-14 23:11:05,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:11:05,614 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-10-14 23:11:05,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 23:11:05,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:05,616 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 23:11:05,616 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:05,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1808388506, now seen corresponding path program 1 times [2019-10-14 23:11:05,617 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:05,617 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802127046] [2019-10-14 23:11:05,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:05,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:05,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:11:05,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802127046] [2019-10-14 23:11:05,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558905976] [2019-10-14 23:11:05,758 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 23:11:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:05,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:11:05,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:11:05,927 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:05,927 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-10-14 23:11:05,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074159773] [2019-10-14 23:11:05,928 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:11:05,928 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:05,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:11:05,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:11:05,929 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 9 states. [2019-10-14 23:11:06,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:06,133 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2019-10-14 23:11:06,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:11:06,134 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2019-10-14 23:11:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:06,135 INFO L225 Difference]: With dead ends: 50 [2019-10-14 23:11:06,135 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:11:06,135 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:11:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:11:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-14 23:11:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:11:06,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-10-14 23:11:06,142 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2019-10-14 23:11:06,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:06,142 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-10-14 23:11:06,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:11:06,142 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-10-14 23:11:06,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:11:06,143 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:06,144 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:11:06,347 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:06,348 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:06,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:06,349 INFO L82 PathProgramCache]: Analyzing trace with hash 560900285, now seen corresponding path program 2 times [2019-10-14 23:11:06,349 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:06,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823480522] [2019-10-14 23:11:06,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:06,350 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:06,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:11:06,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823480522] [2019-10-14 23:11:06,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561978980] [2019-10-14 23:11:06,574 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 23:11:06,669 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:11:06,670 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:11:06,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-14 23:11:06,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:06,736 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 23:11:06,737 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:06,750 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:06,752 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:06,752 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:8 [2019-10-14 23:11:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:11:06,929 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:06,930 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2019-10-14 23:11:06,930 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867049807] [2019-10-14 23:11:06,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:11:06,935 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:06,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:11:06,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:11:06,936 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 18 states. [2019-10-14 23:11:13,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:13,493 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2019-10-14 23:11:13,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:11:13,493 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2019-10-14 23:11:13,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:13,494 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:11:13,494 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:11:13,495 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:11:13,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:11:13,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-10-14 23:11:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:11:13,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-10-14 23:11:13,502 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 32 [2019-10-14 23:11:13,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:13,503 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-10-14 23:11:13,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:11:13,503 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-10-14 23:11:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 23:11:13,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:13,504 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] [2019-10-14 23:11:13,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:13,709 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:13,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:13,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1724014721, now seen corresponding path program 3 times [2019-10-14 23:11:13,710 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:13,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564193422] [2019-10-14 23:11:13,710 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:13,710 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:13,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:13,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:11:13,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564193422] [2019-10-14 23:11:13,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557220312] [2019-10-14 23:11:13,941 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:14,050 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:11:14,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:11:14,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:11:14,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:11:14,121 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:14,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-10-14 23:11:14,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305129899] [2019-10-14 23:11:14,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:11:14,123 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:14,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:11:14,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:11:14,124 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 11 states. [2019-10-14 23:11:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:14,433 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2019-10-14 23:11:14,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:11:14,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2019-10-14 23:11:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:14,438 INFO L225 Difference]: With dead ends: 52 [2019-10-14 23:11:14,439 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 23:11:14,439 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:11:14,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 23:11:14,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2019-10-14 23:11:14,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:11:14,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2019-10-14 23:11:14,449 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 33 [2019-10-14 23:11:14,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:14,450 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2019-10-14 23:11:14,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:11:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2019-10-14 23:11:14,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:11:14,451 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:14,452 INFO L380 BasicCegarLoop]: trace histogram [3, 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] [2019-10-14 23:11:14,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:14,655 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:14,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:14,656 INFO L82 PathProgramCache]: Analyzing trace with hash 458064125, now seen corresponding path program 4 times [2019-10-14 23:11:14,656 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:14,656 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387361445] [2019-10-14 23:11:14,657 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:14,657 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:14,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:11:15,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387361445] [2019-10-14 23:11:15,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923166139] [2019-10-14 23:11:15,002 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:15,101 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:11:15,101 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:11:15,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 52 conjunts are in the unsatisfiable core [2019-10-14 23:11:15,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:15,121 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 23:11:15,122 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:15,129 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:15,130 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:15,130 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-14 23:11:15,143 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 23:11:15,144 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:15,153 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:15,159 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 23:11:15,159 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:15,168 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:15,168 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:15,169 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2019-10-14 23:11:15,185 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:15,186 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-10-14 23:11:15,187 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:15,197 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:15,197 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:15,198 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:19 [2019-10-14 23:11:15,238 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 19 treesize of output 18 [2019-10-14 23:11:15,239 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:15,252 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:15,258 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 19 treesize of output 18 [2019-10-14 23:11:15,259 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:15,276 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:15,277 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:15,278 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:39 [2019-10-14 23:11:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:11:16,190 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:16,190 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2019-10-14 23:11:16,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886535291] [2019-10-14 23:11:16,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 23:11:16,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:16,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 23:11:16,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:11:16,191 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 26 states. [2019-10-14 23:11:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:17,385 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2019-10-14 23:11:17,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:11:17,386 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2019-10-14 23:11:17,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:17,388 INFO L225 Difference]: With dead ends: 75 [2019-10-14 23:11:17,388 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 23:11:17,392 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:11:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 23:11:17,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2019-10-14 23:11:17,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-14 23:11:17,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2019-10-14 23:11:17,420 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 34 [2019-10-14 23:11:17,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:17,421 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2019-10-14 23:11:17,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 23:11:17,421 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2019-10-14 23:11:17,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 23:11:17,426 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:17,426 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:11:17,626 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:17,627 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:17,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:17,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2005342475, now seen corresponding path program 1 times [2019-10-14 23:11:17,627 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:17,627 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295854866] [2019-10-14 23:11:17,628 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:17,628 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:17,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:11:17,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295854866] [2019-10-14 23:11:17,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163875672] [2019-10-14 23:11:17,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:17,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:11:17,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:11:17,886 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:17,886 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-10-14 23:11:17,886 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323591481] [2019-10-14 23:11:17,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:11:17,887 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:17,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:11:17,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:11:17,888 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 11 states. [2019-10-14 23:11:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:18,153 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2019-10-14 23:11:18,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:11:18,153 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2019-10-14 23:11:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:18,154 INFO L225 Difference]: With dead ends: 69 [2019-10-14 23:11:18,155 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 23:11:18,156 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:11:18,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 23:11:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2019-10-14 23:11:18,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:11:18,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2019-10-14 23:11:18,174 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 36 [2019-10-14 23:11:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:18,175 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2019-10-14 23:11:18,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:11:18,175 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2019-10-14 23:11:18,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:11:18,178 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:18,178 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 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 23:11:18,390 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:18,390 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:18,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1775282106, now seen corresponding path program 5 times [2019-10-14 23:11:18,391 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:18,391 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88254635] [2019-10-14 23:11:18,391 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:18,391 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:18,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:11:18,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88254635] [2019-10-14 23:11:18,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047510510] [2019-10-14 23:11:18,495 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:18,600 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 23:11:18,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:11:18,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:11:18,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:11:18,624 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:18,624 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-10-14 23:11:18,624 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640821254] [2019-10-14 23:11:18,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:11:18,625 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:18,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:11:18,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:11:18,626 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 10 states. [2019-10-14 23:11:18,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:18,888 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2019-10-14 23:11:18,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:11:18,889 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-10-14 23:11:18,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:18,890 INFO L225 Difference]: With dead ends: 62 [2019-10-14 23:11:18,890 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:11:18,891 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:11:18,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:11:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2019-10-14 23:11:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:11:18,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-10-14 23:11:18,897 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 37 [2019-10-14 23:11:18,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:18,897 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-10-14 23:11:18,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:11:18,898 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-10-14 23:11:18,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:11:18,898 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:18,899 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2019-10-14 23:11:19,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:19,103 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:19,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:19,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1475160556, now seen corresponding path program 2 times [2019-10-14 23:11:19,104 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:19,104 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049940578] [2019-10-14 23:11:19,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:19,104 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:19,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:19,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:11:19,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049940578] [2019-10-14 23:11:19,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140711484] [2019-10-14 23:11:19,413 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:19,514 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:11:19,514 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:11:19,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-14 23:11:19,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:19,529 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 23:11:19,530 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:19,534 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:19,534 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:19,534 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:10 [2019-10-14 23:11:19,539 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 23:11:19,539 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:19,543 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:19,544 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:19,544 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:14 [2019-10-14 23:11:19,553 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:19,554 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2019-10-14 23:11:19,554 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:19,557 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:19,557 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:19,557 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:13 [2019-10-14 23:11:19,594 INFO L392 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_11|], 2=[|v_#memory_$Pointer$.base_13|]} [2019-10-14 23:11:19,597 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 23:11:19,598 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:19,605 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:19,611 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 20 treesize of output 19 [2019-10-14 23:11:19,612 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:19,620 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:19,621 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:19,621 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:35, output treesize:25 [2019-10-14 23:11:26,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:11:26,367 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:26,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 27 [2019-10-14 23:11:26,367 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482413969] [2019-10-14 23:11:26,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:11:26,368 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:26,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:11:26,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=631, Unknown=2, NotChecked=0, Total=702 [2019-10-14 23:11:26,369 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 27 states. [2019-10-14 23:11:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:43,476 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2019-10-14 23:11:43,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:11:43,477 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 39 [2019-10-14 23:11:43,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:43,478 INFO L225 Difference]: With dead ends: 50 [2019-10-14 23:11:43,478 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 23:11:43,480 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=193, Invalid=1363, Unknown=4, NotChecked=0, Total=1560 [2019-10-14 23:11:43,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 23:11:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2019-10-14 23:11:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:11:43,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-14 23:11:43,487 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 39 [2019-10-14 23:11:43,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:43,487 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-14 23:11:43,487 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:11:43,487 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-14 23:11:43,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 23:11:43,488 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:43,488 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-14 23:11:43,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:43,692 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:43,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:43,692 INFO L82 PathProgramCache]: Analyzing trace with hash 848249904, now seen corresponding path program 3 times [2019-10-14 23:11:43,693 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:43,693 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419233134] [2019-10-14 23:11:43,693 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:43,693 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:43,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:11:43,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419233134] [2019-10-14 23:11:43,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480760031] [2019-10-14 23:11:43,887 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:44,025 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:11:44,026 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:11:44,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:11:44,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:11:44,119 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:44,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2019-10-14 23:11:44,120 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572350743] [2019-10-14 23:11:44,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:11:44,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:44,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:11:44,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:11:44,124 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2019-10-14 23:11:44,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:44,619 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2019-10-14 23:11:44,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:11:44,620 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2019-10-14 23:11:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:44,621 INFO L225 Difference]: With dead ends: 59 [2019-10-14 23:11:44,621 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:11:44,622 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:11:44,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:11:44,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2019-10-14 23:11:44,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 23:11:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2019-10-14 23:11:44,635 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 40 [2019-10-14 23:11:44,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:44,635 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2019-10-14 23:11:44,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:11:44,636 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2019-10-14 23:11:44,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 23:11:44,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:44,637 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2019-10-14 23:11:44,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:44,840 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:44,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:44,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1406111124, now seen corresponding path program 4 times [2019-10-14 23:11:44,841 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:44,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983318321] [2019-10-14 23:11:44,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:44,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:44,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:11:45,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983318321] [2019-10-14 23:11:45,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320201433] [2019-10-14 23:11:45,606 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:45,713 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:11:45,714 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:11:45,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 73 conjunts are in the unsatisfiable core [2019-10-14 23:11:45,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:45,769 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 23:11:45,769 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:45,776 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:45,781 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-10-14 23:11:45,782 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:45,788 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:45,788 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:45,788 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-10-14 23:11:45,902 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:45,903 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 34 [2019-10-14 23:11:45,903 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:45,931 INFO L567 ElimStorePlain]: treesize reduction 12, result has 76.9 percent of original size [2019-10-14 23:11:45,948 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:45,948 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 34 [2019-10-14 23:11:45,949 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:45,977 INFO L567 ElimStorePlain]: treesize reduction 16, result has 69.2 percent of original size [2019-10-14 23:11:45,978 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:45,978 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:40, output treesize:41 [2019-10-14 23:11:46,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:46,167 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:46,167 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 1 case distinctions, treesize of input 55 treesize of output 66 [2019-10-14 23:11:46,169 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:46,201 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:46,202 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 100 [2019-10-14 23:11:46,203 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:46,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:46,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:46,205 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:46,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:46,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:46,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:46,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:46,209 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:46,210 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:46,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:46,211 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:46,213 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 23:11:46,336 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2019-10-14 23:11:46,337 INFO L567 ElimStorePlain]: treesize reduction 52, result has 65.6 percent of original size [2019-10-14 23:11:46,363 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:46,364 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 1 case distinctions, treesize of input 40 treesize of output 55 [2019-10-14 23:11:46,364 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:46,404 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:46,405 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 100 [2019-10-14 23:11:46,406 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:46,515 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2019-10-14 23:11:46,516 INFO L567 ElimStorePlain]: treesize reduction 48, result has 65.5 percent of original size [2019-10-14 23:11:46,517 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-10-14 23:11:46,517 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:115, output treesize:110 [2019-10-14 23:11:46,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:47,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:47,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:47,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:47,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:47,582 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2019-10-14 23:11:47,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 23:11:47,861 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2019-10-14 23:11:47,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 23:11:48,319 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2019-10-14 23:11:48,773 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2019-10-14 23:11:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:11:48,831 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:48,831 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2019-10-14 23:11:48,831 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604737429] [2019-10-14 23:11:48,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 23:11:48,832 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:48,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 23:11:48,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 23:11:48,834 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand 37 states.