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_nondet_insert-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:11:03,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:11:03,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:11:03,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:11:03,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:11:03,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:11:03,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:11:03,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:11:03,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:11:03,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:11:03,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:11:03,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:11:03,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:11:03,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:11:03,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:11:03,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:11:03,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:11:03,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:11:03,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:11:03,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:11:03,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:11:03,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:11:03,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:11:03,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:11:03,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:11:03,218 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:11:03,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:11:03,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:11:03,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:11:03,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:11:03,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:11:03,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:11:03,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:11:03,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:11:03,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:11:03,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:11:03,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:11:03,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:11:03,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:11:03,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:11:03,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:11:03,227 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 23:11:03,241 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:11:03,241 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:11:03,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:11:03,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:11:03,243 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:11:03,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:11:03,243 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:11:03,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:11:03,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:11:03,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:11:03,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:11:03,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:11:03,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:11:03,244 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:11:03,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:11:03,245 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:11:03,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:11:03,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:11:03,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:11:03,246 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:11:03,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:11:03,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:11:03,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:11:03,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:11:03,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:11:03,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:11:03,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:11:03,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:11:03,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:11:03,526 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:11:03,539 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:11:03,543 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:11:03,544 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:11:03,545 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:11:03,545 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-2.i [2019-10-14 23:11:03,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18052842/2467800408504476a9977415ebff60e9/FLAG9880bb679 [2019-10-14 23:11:04,211 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:11:04,214 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-2.i [2019-10-14 23:11:04,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18052842/2467800408504476a9977415ebff60e9/FLAG9880bb679 [2019-10-14 23:11:04,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c18052842/2467800408504476a9977415ebff60e9 [2019-10-14 23:11:04,485 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:11:04,487 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:11:04,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:11:04,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:11:04,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:11:04,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:11:04" (1/1) ... [2019-10-14 23:11:04,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@395d78e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:04, skipping insertion in model container [2019-10-14 23:11:04,495 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:11:04" (1/1) ... [2019-10-14 23:11:04,503 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:11:04,549 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:11:05,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:11:05,023 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:11:05,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:11:05,136 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:11:05,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:05 WrapperNode [2019-10-14 23:11:05,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:11:05,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:11:05,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:11:05,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:11:05,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:05" (1/1) ... [2019-10-14 23:11:05,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:05" (1/1) ... [2019-10-14 23:11:05,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:05" (1/1) ... [2019-10-14 23:11:05,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:05" (1/1) ... [2019-10-14 23:11:05,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:05" (1/1) ... [2019-10-14 23:11:05,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:05" (1/1) ... [2019-10-14 23:11:05,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:05" (1/1) ... [2019-10-14 23:11:05,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:11:05,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:11:05,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:11:05,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:11:05,212 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:11:05,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:11:05,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:11:05,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-10-14 23:11:05,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-10-14 23:11:05,266 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-14 23:11:05,266 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-10-14 23:11:05,266 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2019-10-14 23:11:05,266 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-10-14 23:11:05,267 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2019-10-14 23:11:05,267 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2019-10-14 23:11:05,267 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:11:05,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:11:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:11:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-10-14 23:11:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-10-14 23:11:05,269 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-10-14 23:11:05,269 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-10-14 23:11:05,269 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-10-14 23:11:05,269 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-10-14 23:11:05,269 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-10-14 23:11:05,269 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-10-14 23:11:05,270 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-10-14 23:11:05,270 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-10-14 23:11:05,270 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-10-14 23:11:05,270 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-10-14 23:11:05,270 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-10-14 23:11:05,270 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-10-14 23:11:05,271 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-10-14 23:11:05,271 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-10-14 23:11:05,271 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-10-14 23:11:05,271 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-10-14 23:11:05,272 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-10-14 23:11:05,272 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-10-14 23:11:05,272 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-10-14 23:11:05,272 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-10-14 23:11:05,272 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-10-14 23:11:05,273 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-10-14 23:11:05,273 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-10-14 23:11:05,273 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-10-14 23:11:05,273 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-10-14 23:11:05,273 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-10-14 23:11:05,273 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-10-14 23:11:05,274 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-10-14 23:11:05,274 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-10-14 23:11:05,274 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-10-14 23:11:05,274 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-10-14 23:11:05,274 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-10-14 23:11:05,274 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-10-14 23:11:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-10-14 23:11:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-10-14 23:11:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-10-14 23:11:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-10-14 23:11:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-10-14 23:11:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-10-14 23:11:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-10-14 23:11:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-10-14 23:11:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-10-14 23:11:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-10-14 23:11:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-10-14 23:11:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-10-14 23:11:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-10-14 23:11:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-10-14 23:11:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-10-14 23:11:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-10-14 23:11:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-10-14 23:11:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:11:05,277 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-14 23:11:05,277 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-10-14 23:11:05,277 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-14 23:11:05,277 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-10-14 23:11:05,277 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-10-14 23:11:05,277 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-10-14 23:11:05,277 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-10-14 23:11:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-10-14 23:11:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-10-14 23:11:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-10-14 23:11:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-10-14 23:11:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-10-14 23:11:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:11:05,279 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-10-14 23:11:05,279 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-10-14 23:11:05,279 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-10-14 23:11:05,279 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-10-14 23:11:05,279 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-10-14 23:11:05,279 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-10-14 23:11:05,280 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-10-14 23:11:05,280 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-10-14 23:11:05,280 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-10-14 23:11:05,280 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-10-14 23:11:05,280 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-10-14 23:11:05,280 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-10-14 23:11:05,281 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-10-14 23:11:05,281 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-10-14 23:11:05,281 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-10-14 23:11:05,281 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-10-14 23:11:05,281 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-10-14 23:11:05,281 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-10-14 23:11:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-10-14 23:11:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-10-14 23:11:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-10-14 23:11:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-10-14 23:11:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-10-14 23:11:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-10-14 23:11:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-10-14 23:11:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-10-14 23:11:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-10-14 23:11:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-10-14 23:11:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-10-14 23:11:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-10-14 23:11:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-10-14 23:11:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-10-14 23:11:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-10-14 23:11:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-10-14 23:11:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-10-14 23:11:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-10-14 23:11:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-10-14 23:11:05,284 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-10-14 23:11:05,284 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-10-14 23:11:05,284 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-14 23:11:05,284 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-10-14 23:11:05,284 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 23:11:05,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 23:11:05,285 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2019-10-14 23:11:05,285 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 23:11:05,285 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-10-14 23:11:05,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:11:05,285 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2019-10-14 23:11:05,285 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2019-10-14 23:11:05,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:11:05,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:11:05,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-14 23:11:05,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:11:05,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:11:05,679 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-14 23:11:05,912 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:11:05,912 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-14 23:11:05,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:11:05 BoogieIcfgContainer [2019-10-14 23:11:05,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:11:05,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:11:05,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:11:05,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:11:05,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:11:04" (1/3) ... [2019-10-14 23:11:05,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e7f678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:11:05, skipping insertion in model container [2019-10-14 23:11:05,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:11:05" (2/3) ... [2019-10-14 23:11:05,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68e7f678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:11:05, skipping insertion in model container [2019-10-14 23:11:05,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:11:05" (3/3) ... [2019-10-14 23:11:05,921 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2019-10-14 23:11:05,930 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:11:05,938 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:11:05,949 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:11:05,969 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:11:05,970 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:11:05,970 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:11:05,970 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:11:05,970 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:11:05,970 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:11:05,971 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:11:05,971 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:11:05,987 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2019-10-14 23:11:05,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:11:05,994 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:05,995 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:11:05,997 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:06,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:06,003 INFO L82 PathProgramCache]: Analyzing trace with hash -87837704, now seen corresponding path program 1 times [2019-10-14 23:11:06,011 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:06,011 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404835953] [2019-10-14 23:11:06,011 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:06,012 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:06,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:11:06,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404835953] [2019-10-14 23:11:06,247 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:11:06,247 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:11:06,248 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857738112] [2019-10-14 23:11:06,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:11:06,253 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:06,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:11:06,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:11:06,271 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 4 states. [2019-10-14 23:11:06,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:06,522 INFO L93 Difference]: Finished difference Result 132 states and 178 transitions. [2019-10-14 23:11:06,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:11:06,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2019-10-14 23:11:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:06,535 INFO L225 Difference]: With dead ends: 132 [2019-10-14 23:11:06,535 INFO L226 Difference]: Without dead ends: 56 [2019-10-14 23:11:06,540 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 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 23:11:06,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-14 23:11:06,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2019-10-14 23:11:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 23:11:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2019-10-14 23:11:06,589 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 37 [2019-10-14 23:11:06,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:06,589 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2019-10-14 23:11:06,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:11:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2019-10-14 23:11:06,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:11:06,592 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:06,592 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, 1, 1, 1, 1, 1, 1] [2019-10-14 23:11:06,593 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:06,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1536900415, now seen corresponding path program 1 times [2019-10-14 23:11:06,594 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:06,594 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321574702] [2019-10-14 23:11:06,594 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:06,594 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:06,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:06,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:11:06,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321574702] [2019-10-14 23:11:06,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543945135] [2019-10-14 23:11:06,913 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 23:11:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:07,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:11:07,036 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:07,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:11:07,146 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:11:07,147 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 15 [2019-10-14 23:11:07,147 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988397186] [2019-10-14 23:11:07,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:11:07,149 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:07,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:11:07,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:11:07,150 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 9 states. [2019-10-14 23:11:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:07,288 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2019-10-14 23:11:07,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:11:07,289 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2019-10-14 23:11:07,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:07,292 INFO L225 Difference]: With dead ends: 91 [2019-10-14 23:11:07,293 INFO L226 Difference]: Without dead ends: 53 [2019-10-14 23:11:07,295 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:11:07,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-14 23:11:07,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-10-14 23:11:07,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 23:11:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-10-14 23:11:07,319 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 42 [2019-10-14 23:11:07,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:07,324 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-10-14 23:11:07,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:11:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-10-14 23:11:07,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:11:07,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:07,328 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:11:07,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:07,533 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:07,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1663200358, now seen corresponding path program 1 times [2019-10-14 23:11:07,534 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:07,535 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728391845] [2019-10-14 23:11:07,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:07,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:07,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:11:07,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728391845] [2019-10-14 23:11:07,847 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:11:07,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-10-14 23:11:07,848 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95613980] [2019-10-14 23:11:07,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:11:07,848 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:07,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:11:07,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:11:07,849 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 12 states. [2019-10-14 23:11:08,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:08,440 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2019-10-14 23:11:08,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:11:08,441 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2019-10-14 23:11:08,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:08,443 INFO L225 Difference]: With dead ends: 73 [2019-10-14 23:11:08,443 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 23:11:08,444 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:11:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 23:11:08,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-10-14 23:11:08,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 23:11:08,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2019-10-14 23:11:08,456 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 46 [2019-10-14 23:11:08,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:08,456 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2019-10-14 23:11:08,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:11:08,457 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2019-10-14 23:11:08,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:11:08,458 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:08,458 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:11:08,458 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:08,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:08,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1968577046, now seen corresponding path program 1 times [2019-10-14 23:11:08,459 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:08,459 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845987824] [2019-10-14 23:11:08,459 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:08,460 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:08,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-14 23:11:08,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845987824] [2019-10-14 23:11:08,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729536332] [2019-10-14 23:11:08,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:09,027 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:11:09,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:11:09,125 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:09,125 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 21 [2019-10-14 23:11:09,126 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062858851] [2019-10-14 23:11:09,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:11:09,127 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:09,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:11:09,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:11:09,128 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 21 states. [2019-10-14 23:11:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:10,582 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2019-10-14 23:11:10,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 23:11:10,583 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2019-10-14 23:11:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:10,585 INFO L225 Difference]: With dead ends: 131 [2019-10-14 23:11:10,585 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 23:11:10,587 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 23:11:10,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 23:11:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2019-10-14 23:11:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 23:11:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2019-10-14 23:11:10,599 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 47 [2019-10-14 23:11:10,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:10,599 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2019-10-14 23:11:10,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:11:10,600 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2019-10-14 23:11:10,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 23:11:10,601 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:10,601 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:11:10,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:10,815 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:10,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:10,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1781197021, now seen corresponding path program 2 times [2019-10-14 23:11:10,816 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:10,817 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449542062] [2019-10-14 23:11:10,817 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:10,817 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:10,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:11:11,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449542062] [2019-10-14 23:11:11,053 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003490624] [2019-10-14 23:11:11,053 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 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 23:11:11,191 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:11:11,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:11:11,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 38 conjunts are in the unsatisfiable core [2019-10-14 23:11:11,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:11,257 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 23:11:11,258 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:11,267 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:11,268 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 23:11:11,269 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:8 [2019-10-14 23:11:11,552 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2019-10-14 23:11:11,553 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:11,557 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:11,558 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-10-14 23:11:11,559 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:20 [2019-10-14 23:11:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:11:11,906 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:11,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2019-10-14 23:11:11,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12945423] [2019-10-14 23:11:11,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:11:11,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:11,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:11:11,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:11:11,908 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 20 states. [2019-10-14 23:11:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:36,332 INFO L93 Difference]: Finished difference Result 129 states and 149 transitions. [2019-10-14 23:11:36,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:11:36,333 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2019-10-14 23:11:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:36,335 INFO L225 Difference]: With dead ends: 129 [2019-10-14 23:11:36,335 INFO L226 Difference]: Without dead ends: 119 [2019-10-14 23:11:36,337 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:11:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-10-14 23:11:36,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 89. [2019-10-14 23:11:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-14 23:11:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2019-10-14 23:11:36,355 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 51 [2019-10-14 23:11:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:36,356 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2019-10-14 23:11:36,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:11:36,356 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2019-10-14 23:11:36,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 23:11:36,357 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:36,358 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:11:36,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:36,565 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:36,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1370713395, now seen corresponding path program 3 times [2019-10-14 23:11:36,566 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:36,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303814208] [2019-10-14 23:11:36,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:36,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:36,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:11:36,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303814208] [2019-10-14 23:11:36,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876375648] [2019-10-14 23:11:36,952 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 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 23:11:37,059 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 23:11:37,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:11:37,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 23:11:37,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:11:37,185 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:37,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 20 [2019-10-14 23:11:37,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095968740] [2019-10-14 23:11:37,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:11:37,186 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:37,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:11:37,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:11:37,187 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 20 states. [2019-10-14 23:11:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:38,271 INFO L93 Difference]: Finished difference Result 163 states and 222 transitions. [2019-10-14 23:11:38,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:11:38,272 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2019-10-14 23:11:38,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:38,275 INFO L225 Difference]: With dead ends: 163 [2019-10-14 23:11:38,275 INFO L226 Difference]: Without dead ends: 159 [2019-10-14 23:11:38,276 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:11:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-10-14 23:11:38,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 127. [2019-10-14 23:11:38,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-10-14 23:11:38,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 167 transitions. [2019-10-14 23:11:38,314 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 167 transitions. Word has length 52 [2019-10-14 23:11:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:38,317 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 167 transitions. [2019-10-14 23:11:38,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:11:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 167 transitions. [2019-10-14 23:11:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 23:11:38,319 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:38,319 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:11:38,522 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:38,523 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:38,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:38,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1530622877, now seen corresponding path program 4 times [2019-10-14 23:11:38,524 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:38,524 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428987045] [2019-10-14 23:11:38,525 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:38,525 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:38,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:11:38,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428987045] [2019-10-14 23:11:38,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449859111] [2019-10-14 23:11:38,953 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 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 23:11:39,089 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:11:39,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:11:39,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 56 conjunts are in the unsatisfiable core [2019-10-14 23:11:39,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:39,114 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 23:11:39,114 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:39,126 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:39,127 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:39,127 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-10-14 23:11:39,136 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 23:11:39,137 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:39,146 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:39,150 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 23:11:39,151 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:39,158 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:39,159 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:39,159 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2019-10-14 23:11:39,174 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:39,175 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 23:11:39,176 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:39,184 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:39,184 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-10-14 23:11:39,185 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:19 [2019-10-14 23:11:39,265 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 23:11:39,266 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:39,279 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:39,285 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 23:11:39,286 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-10-14 23:11:39,297 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 23:11:39,298 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 23:11:39,298 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:39 [2019-10-14 23:11:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:11:41,116 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:41,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2019-10-14 23:11:41,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261820880] [2019-10-14 23:11:41,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:11:41,117 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:41,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:11:41,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:11:41,118 INFO L87 Difference]: Start difference. First operand 127 states and 167 transitions. Second operand 28 states. [2019-10-14 23:11:44,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:44,387 INFO L93 Difference]: Finished difference Result 205 states and 268 transitions. [2019-10-14 23:11:44,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 23:11:44,390 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 53 [2019-10-14 23:11:44,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:44,392 INFO L225 Difference]: With dead ends: 205 [2019-10-14 23:11:44,392 INFO L226 Difference]: Without dead ends: 195 [2019-10-14 23:11:44,394 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:11:44,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-10-14 23:11:44,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2019-10-14 23:11:44,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-10-14 23:11:44,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 229 transitions. [2019-10-14 23:11:44,426 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 229 transitions. Word has length 53 [2019-10-14 23:11:44,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:44,426 INFO L462 AbstractCegarLoop]: Abstraction has 173 states and 229 transitions. [2019-10-14 23:11:44,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:11:44,427 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 229 transitions. [2019-10-14 23:11:44,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 23:11:44,428 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:44,429 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:11:44,632 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:44,633 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:44,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:44,634 INFO L82 PathProgramCache]: Analyzing trace with hash -407513290, now seen corresponding path program 1 times [2019-10-14 23:11:44,634 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:44,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991586156] [2019-10-14 23:11:44,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:44,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:44,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:44,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:11:44,893 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991586156] [2019-10-14 23:11:44,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848841085] [2019-10-14 23:11:44,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:11:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:45,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:11:45,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:45,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:11:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:11:45,143 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:45,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2019-10-14 23:11:45,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153787103] [2019-10-14 23:11:45,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:11:45,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:45,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:11:45,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:11:45,145 INFO L87 Difference]: Start difference. First operand 173 states and 229 transitions. Second operand 18 states. [2019-10-14 23:11:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:46,681 INFO L93 Difference]: Finished difference Result 332 states and 450 transitions. [2019-10-14 23:11:46,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:11:46,683 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 55 [2019-10-14 23:11:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:46,686 INFO L225 Difference]: With dead ends: 332 [2019-10-14 23:11:46,686 INFO L226 Difference]: Without dead ends: 222 [2019-10-14 23:11:46,688 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:11:46,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-10-14 23:11:46,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 190. [2019-10-14 23:11:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-10-14 23:11:46,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 256 transitions. [2019-10-14 23:11:46,725 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 256 transitions. Word has length 55 [2019-10-14 23:11:46,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:46,725 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 256 transitions. [2019-10-14 23:11:46,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:11:46,726 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 256 transitions. [2019-10-14 23:11:46,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 23:11:46,727 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:46,727 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:11:46,935 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:46,936 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:46,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2096457032, now seen corresponding path program 1 times [2019-10-14 23:11:46,937 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:46,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253606453] [2019-10-14 23:11:46,938 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:46,938 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:46,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:11:47,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253606453] [2019-10-14 23:11:47,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981913806] [2019-10-14 23:11:47,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 23:11:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:47,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:11:47,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:11:47,365 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:11:47,365 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [13] total 17 [2019-10-14 23:11:47,365 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215446070] [2019-10-14 23:11:47,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:11:47,366 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:47,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:11:47,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:11:47,367 INFO L87 Difference]: Start difference. First operand 190 states and 256 transitions. Second operand 7 states. [2019-10-14 23:11:47,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:47,478 INFO L93 Difference]: Finished difference Result 229 states and 309 transitions. [2019-10-14 23:11:47,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:11:47,478 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2019-10-14 23:11:47,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:47,480 INFO L225 Difference]: With dead ends: 229 [2019-10-14 23:11:47,481 INFO L226 Difference]: Without dead ends: 203 [2019-10-14 23:11:47,481 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:11:47,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-10-14 23:11:47,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2019-10-14 23:11:47,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-10-14 23:11:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 260 transitions. [2019-10-14 23:11:47,506 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 260 transitions. Word has length 55 [2019-10-14 23:11:47,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:47,507 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 260 transitions. [2019-10-14 23:11:47,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:11:47,507 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 260 transitions. [2019-10-14 23:11:47,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 23:11:47,508 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:47,509 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:11:47,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:47,713 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:47,714 INFO L82 PathProgramCache]: Analyzing trace with hash -936081888, now seen corresponding path program 2 times [2019-10-14 23:11:47,714 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:47,714 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274516647] [2019-10-14 23:11:47,714 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:47,715 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:47,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:11:47,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274516647] [2019-10-14 23:11:47,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642099533] [2019-10-14 23:11:47,895 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 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 23:11:48,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:11:48,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:11:48,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:11:48,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:48,112 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:11:48,112 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:48,112 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 19 [2019-10-14 23:11:48,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193056051] [2019-10-14 23:11:48,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:11:48,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:48,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:11:48,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:11:48,114 INFO L87 Difference]: Start difference. First operand 194 states and 260 transitions. Second operand 19 states. [2019-10-14 23:11:49,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:11:49,065 INFO L93 Difference]: Finished difference Result 293 states and 394 transitions. [2019-10-14 23:11:49,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:11:49,066 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2019-10-14 23:11:49,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:11:49,069 INFO L225 Difference]: With dead ends: 293 [2019-10-14 23:11:49,069 INFO L226 Difference]: Without dead ends: 203 [2019-10-14 23:11:49,070 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:11:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-10-14 23:11:49,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 177. [2019-10-14 23:11:49,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-10-14 23:11:49,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 236 transitions. [2019-10-14 23:11:49,103 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 236 transitions. Word has length 55 [2019-10-14 23:11:49,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:11:49,104 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 236 transitions. [2019-10-14 23:11:49,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:11:49,104 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 236 transitions. [2019-10-14 23:11:49,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 23:11:49,105 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:11:49,106 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:11:49,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:11:49,310 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:11:49,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:11:49,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1011494620, now seen corresponding path program 5 times [2019-10-14 23:11:49,311 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:11:49,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296421981] [2019-10-14 23:11:49,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:49,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:11:49,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:11:49,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:49,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:11:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 23:11:49,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296421981] [2019-10-14 23:11:49,517 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299194424] [2019-10-14 23:11:49,518 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 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 23:11:49,659 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 23:11:49,659 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:11:49,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:11:49,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:11:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:11:49,731 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:11:49,732 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 17 [2019-10-14 23:11:49,732 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223767580] [2019-10-14 23:11:49,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:11:49,733 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:11:49,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:11:49,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:11:49,734 INFO L87 Difference]: Start difference. First operand 177 states and 236 transitions. Second operand 17 states.