/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-simple/sll2n_update_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:19:27,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:19:27,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:19:27,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:19:27,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:19:27,324 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:19:27,326 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:19:27,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:19:27,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:19:27,340 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:19:27,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:19:27,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:19:27,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:19:27,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:19:27,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:19:27,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:19:27,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:19:27,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:19:27,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:19:27,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:19:27,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:19:27,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:19:27,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:19:27,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:19:27,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 21:19:27,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 21:19:27,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 21:19:27,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 21:19:27,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 21:19:27,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 21:19:27,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 21:19:27,363 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 21:19:27,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 21:19:27,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 21:19:27,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 21:19:27,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 21:19:27,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 21:19:27,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 21:19:27,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:19:27,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:19:27,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:19:27,373 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 21:19:27,396 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:19:27,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:19:27,402 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:19:27,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:19:27,403 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:19:27,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:19:27,403 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:19:27,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:19:27,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:19:27,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:19:27,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:19:27,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:19:27,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:19:27,407 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:19:27,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:19:27,408 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:19:27,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:19:27,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:19:27,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:19:27,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:19:27,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:19:27,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:19:27,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:19:27,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:19:27,410 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:19:27,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:19:27,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:19:27,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:19:27,411 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:19:27,671 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:19:27,683 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:19:27,688 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:19:27,689 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:19:27,690 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:19:27,691 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2n_update_all_reverse.i [2019-11-06 21:19:27,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6438c9065/2480e8d44e914dc5aa783a2a22db55f5/FLAG862c5f54c [2019-11-06 21:19:28,318 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:19:28,319 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2n_update_all_reverse.i [2019-11-06 21:19:28,332 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6438c9065/2480e8d44e914dc5aa783a2a22db55f5/FLAG862c5f54c [2019-11-06 21:19:28,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6438c9065/2480e8d44e914dc5aa783a2a22db55f5 [2019-11-06 21:19:28,618 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:19:28,619 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:19:28,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:19:28,620 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:19:28,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:19:28,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:19:28" (1/1) ... [2019-11-06 21:19:28,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fc6e6d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:19:28, skipping insertion in model container [2019-11-06 21:19:28,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:19:28" (1/1) ... [2019-11-06 21:19:28,633 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:19:28,678 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:19:29,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:19:29,112 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:19:29,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:19:29,212 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:19:29,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:19:29 WrapperNode [2019-11-06 21:19:29,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:19:29,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:19:29,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:19:29,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:19:29,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:19:29" (1/1) ... [2019-11-06 21:19:29,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:19:29" (1/1) ... [2019-11-06 21:19:29,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:19:29" (1/1) ... [2019-11-06 21:19:29,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:19:29" (1/1) ... [2019-11-06 21:19:29,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:19:29" (1/1) ... [2019-11-06 21:19:29,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:19:29" (1/1) ... [2019-11-06 21:19:29,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:19:29" (1/1) ... [2019-11-06 21:19:29,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:19:29,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:19:29,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:19:29,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:19:29,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:19:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:19:29,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:19:29,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:19:29,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-06 21:19:29,348 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-06 21:19:29,348 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-06 21:19:29,348 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-06 21:19:29,349 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-11-06 21:19:29,349 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-11-06 21:19:29,349 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_get_data_at [2019-11-06 21:19:29,349 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_update_at [2019-11-06 21:19:29,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:19:29,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:19:29,350 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-06 21:19:29,350 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-06 21:19:29,350 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-06 21:19:29,350 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-06 21:19:29,350 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-06 21:19:29,350 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-06 21:19:29,351 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-06 21:19:29,351 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-06 21:19:29,351 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-06 21:19:29,351 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-06 21:19:29,351 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-06 21:19:29,351 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-06 21:19:29,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-06 21:19:29,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-06 21:19:29,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-06 21:19:29,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-06 21:19:29,352 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-06 21:19:29,352 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-06 21:19:29,353 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-06 21:19:29,353 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-06 21:19:29,353 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-06 21:19:29,353 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-06 21:19:29,353 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-06 21:19:29,353 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-06 21:19:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-06 21:19:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-06 21:19:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-06 21:19:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-06 21:19:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-06 21:19:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-06 21:19:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-06 21:19:29,355 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-06 21:19:29,355 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-06 21:19:29,355 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-06 21:19:29,355 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-06 21:19:29,355 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-06 21:19:29,355 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-06 21:19:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-06 21:19:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-06 21:19:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-06 21:19:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-06 21:19:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-06 21:19:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-06 21:19:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-06 21:19:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-06 21:19:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-06 21:19:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-06 21:19:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-06 21:19:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-06 21:19:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-06 21:19:29,358 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-06 21:19:29,358 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-06 21:19:29,358 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 21:19:29,358 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-06 21:19:29,358 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-06 21:19:29,358 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-06 21:19:29,359 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-06 21:19:29,359 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-06 21:19:29,359 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-06 21:19:29,359 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-06 21:19:29,359 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-06 21:19:29,359 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-06 21:19:29,360 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-06 21:19:29,360 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-06 21:19:29,360 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-06 21:19:29,360 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 21:19:29,360 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-06 21:19:29,360 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-06 21:19:29,361 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-06 21:19:29,361 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-06 21:19:29,361 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-06 21:19:29,361 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-06 21:19:29,361 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-06 21:19:29,361 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-06 21:19:29,361 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-06 21:19:29,362 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-06 21:19:29,362 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-06 21:19:29,362 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-06 21:19:29,362 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-06 21:19:29,362 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-06 21:19:29,362 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-06 21:19:29,362 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-06 21:19:29,363 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-06 21:19:29,363 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-06 21:19:29,363 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-06 21:19:29,363 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-06 21:19:29,363 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-06 21:19:29,363 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-06 21:19:29,364 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-06 21:19:29,364 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-06 21:19:29,364 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-06 21:19:29,364 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-06 21:19:29,364 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-06 21:19:29,364 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-06 21:19:29,364 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-06 21:19:29,365 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-06 21:19:29,365 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-06 21:19:29,365 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-06 21:19:29,365 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-06 21:19:29,365 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-06 21:19:29,365 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-06 21:19:29,366 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-06 21:19:29,366 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-06 21:19:29,366 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-06 21:19:29,366 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-06 21:19:29,366 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-06 21:19:29,366 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-06 21:19:29,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 21:19:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-06 21:19:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 21:19:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-11-06 21:19:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-11-06 21:19:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-06 21:19:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 21:19:29,367 INFO L130 BoogieDeclarations]: Found specification of procedure sll_get_data_at [2019-11-06 21:19:29,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 21:19:29,368 INFO L130 BoogieDeclarations]: Found specification of procedure sll_update_at [2019-11-06 21:19:29,368 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:19:29,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:19:29,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:19:29,823 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-06 21:19:29,955 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:19:29,955 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-06 21:19:29,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:19:29 BoogieIcfgContainer [2019-11-06 21:19:29,957 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:19:29,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:19:29,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:19:29,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:19:29,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:19:28" (1/3) ... [2019-11-06 21:19:29,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10eca025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:19:29, skipping insertion in model container [2019-11-06 21:19:29,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:19:29" (2/3) ... [2019-11-06 21:19:29,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10eca025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:19:29, skipping insertion in model container [2019-11-06 21:19:29,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:19:29" (3/3) ... [2019-11-06 21:19:29,965 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_update_all_reverse.i [2019-11-06 21:19:29,975 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:19:29,984 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:19:29,992 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:19:30,016 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:19:30,016 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:19:30,016 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:19:30,017 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:19:30,017 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:19:30,017 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:19:30,017 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:19:30,018 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:19:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2019-11-06 21:19:30,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 21:19:30,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:19:30,042 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:19:30,044 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:19:30,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:19:30,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1559034541, now seen corresponding path program 1 times [2019-11-06 21:19:30,060 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:19:30,060 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164258882] [2019-11-06 21:19:30,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:19:30,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:30,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:19:30,339 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164258882] [2019-11-06 21:19:30,340 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:19:30,340 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 21:19:30,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716259900] [2019-11-06 21:19:30,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 21:19:30,347 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:19:30,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 21:19:30,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 21:19:30,361 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 4 states. [2019-11-06 21:19:30,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:19:30,722 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2019-11-06 21:19:30,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 21:19:30,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-06 21:19:30,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:19:30,736 INFO L225 Difference]: With dead ends: 128 [2019-11-06 21:19:30,737 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 21:19:30,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 21:19:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 21:19:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 42. [2019-11-06 21:19:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 21:19:30,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2019-11-06 21:19:30,789 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2019-11-06 21:19:30,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:19:30,789 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2019-11-06 21:19:30,789 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 21:19:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2019-11-06 21:19:30,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 21:19:30,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:19:30,791 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:19:30,792 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:19:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:19:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash -404189262, now seen corresponding path program 1 times [2019-11-06 21:19:30,792 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:19:30,793 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52690775] [2019-11-06 21:19:30,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:19:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:19:30,907 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52690775] [2019-11-06 21:19:30,907 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:19:30,907 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 21:19:30,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536803561] [2019-11-06 21:19:30,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:19:30,909 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:19:30,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:19:30,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-06 21:19:30,910 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 6 states. [2019-11-06 21:19:31,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:19:31,286 INFO L93 Difference]: Finished difference Result 92 states and 108 transitions. [2019-11-06 21:19:31,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 21:19:31,287 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-06 21:19:31,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:19:31,289 INFO L225 Difference]: With dead ends: 92 [2019-11-06 21:19:31,289 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 21:19:31,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:19:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 21:19:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 43. [2019-11-06 21:19:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-06 21:19:31,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-11-06 21:19:31,303 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 25 [2019-11-06 21:19:31,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:19:31,303 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-11-06 21:19:31,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:19:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-11-06 21:19:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 21:19:31,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:19:31,305 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:19:31,305 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:19:31,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:19:31,306 INFO L82 PathProgramCache]: Analyzing trace with hash 856367100, now seen corresponding path program 1 times [2019-11-06 21:19:31,306 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:19:31,306 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19914756] [2019-11-06 21:19:31,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:19:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:19:31,698 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19914756] [2019-11-06 21:19:31,698 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326045226] [2019-11-06 21:19:31,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:19:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:31,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 21:19:31,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:19:31,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:19:31,886 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:19:31,886 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16] total 17 [2019-11-06 21:19:31,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345106778] [2019-11-06 21:19:31,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 21:19:31,887 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:19:31,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 21:19:31,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2019-11-06 21:19:31,888 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 5 states. [2019-11-06 21:19:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:19:31,977 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2019-11-06 21:19:31,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 21:19:31,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2019-11-06 21:19:31,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:19:31,979 INFO L225 Difference]: With dead ends: 73 [2019-11-06 21:19:31,979 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 21:19:31,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:19:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 21:19:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-11-06 21:19:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-06 21:19:31,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-11-06 21:19:31,988 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 33 [2019-11-06 21:19:31,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:19:31,988 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-11-06 21:19:31,988 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 21:19:31,988 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-11-06 21:19:31,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 21:19:31,990 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:19:31,990 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:19:32,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:19:32,194 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:19:32,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:19:32,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1586404999, now seen corresponding path program 1 times [2019-11-06 21:19:32,195 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:19:32,195 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970539175] [2019-11-06 21:19:32,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:19:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:19:32,515 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970539175] [2019-11-06 21:19:32,515 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592210698] [2019-11-06 21:19:32,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:19:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:32,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 21:19:32,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:19:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 21:19:32,663 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:19:32,663 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6] total 18 [2019-11-06 21:19:32,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361446135] [2019-11-06 21:19:32,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 21:19:32,666 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:19:32,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 21:19:32,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2019-11-06 21:19:32,667 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 18 states. [2019-11-06 21:19:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:19:33,288 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2019-11-06 21:19:33,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 21:19:33,289 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2019-11-06 21:19:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:19:33,293 INFO L225 Difference]: With dead ends: 85 [2019-11-06 21:19:33,293 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 21:19:33,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2019-11-06 21:19:33,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 21:19:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2019-11-06 21:19:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 21:19:33,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2019-11-06 21:19:33,317 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 42 [2019-11-06 21:19:33,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:19:33,318 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2019-11-06 21:19:33,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 21:19:33,318 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2019-11-06 21:19:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 21:19:33,323 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:19:33,325 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1] [2019-11-06 21:19:33,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:19:33,526 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:19:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:19:33,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1073302620, now seen corresponding path program 2 times [2019-11-06 21:19:33,527 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:19:33,527 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070525313] [2019-11-06 21:19:33,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:19:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:33,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-06 21:19:33,742 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070525313] [2019-11-06 21:19:33,742 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675974487] [2019-11-06 21:19:33,742 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 [2019-11-06 21:19:33,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 21:19:33,876 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:19:33,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 21:19:33,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:19:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:19:33,943 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 21:19:33,943 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 15 [2019-11-06 21:19:33,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520883137] [2019-11-06 21:19:33,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 21:19:33,944 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:19:33,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 21:19:33,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:19:33,945 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 6 states. [2019-11-06 21:19:34,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:19:34,020 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2019-11-06 21:19:34,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 21:19:34,021 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2019-11-06 21:19:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:19:34,022 INFO L225 Difference]: With dead ends: 73 [2019-11-06 21:19:34,023 INFO L226 Difference]: Without dead ends: 61 [2019-11-06 21:19:34,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-11-06 21:19:34,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-06 21:19:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2019-11-06 21:19:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-06 21:19:34,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2019-11-06 21:19:34,034 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 51 [2019-11-06 21:19:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:19:34,034 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2019-11-06 21:19:34,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 21:19:34,034 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2019-11-06 21:19:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 21:19:34,036 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:19:34,036 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-11-06 21:19:34,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:19:34,240 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:19:34,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:19:34,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1257353349, now seen corresponding path program 1 times [2019-11-06 21:19:34,241 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:19:34,241 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275385649] [2019-11-06 21:19:34,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:19:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 21:19:34,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275385649] [2019-11-06 21:19:34,438 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:19:34,438 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-06 21:19:34,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088540866] [2019-11-06 21:19:34,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 21:19:34,441 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:19:34,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 21:19:34,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-06 21:19:34,442 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 9 states. [2019-11-06 21:19:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:19:34,783 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2019-11-06 21:19:34,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 21:19:34,784 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 21:19:34,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:19:34,785 INFO L225 Difference]: With dead ends: 92 [2019-11-06 21:19:34,785 INFO L226 Difference]: Without dead ends: 65 [2019-11-06 21:19:34,786 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2019-11-06 21:19:34,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-06 21:19:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2019-11-06 21:19:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-06 21:19:34,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2019-11-06 21:19:34,797 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 52 [2019-11-06 21:19:34,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:19:34,798 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2019-11-06 21:19:34,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 21:19:34,798 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2019-11-06 21:19:34,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 21:19:34,799 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:19:34,799 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-11-06 21:19:34,800 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:19:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:19:34,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1633721938, now seen corresponding path program 1 times [2019-11-06 21:19:34,800 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:19:34,800 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422866260] [2019-11-06 21:19:34,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:19:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 21:19:34,961 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422866260] [2019-11-06 21:19:34,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356543373] [2019-11-06 21:19:34,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 21:19:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:35,103 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 21:19:35,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:19:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 21:19:35,120 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:19:35,121 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-11-06 21:19:35,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683713157] [2019-11-06 21:19:35,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 21:19:35,122 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:19:35,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 21:19:35,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-06 21:19:35,122 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 8 states. [2019-11-06 21:19:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:19:35,368 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2019-11-06 21:19:35,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:19:35,369 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2019-11-06 21:19:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:19:35,370 INFO L225 Difference]: With dead ends: 86 [2019-11-06 21:19:35,370 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 21:19:35,371 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:19:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 21:19:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2019-11-06 21:19:35,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 21:19:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2019-11-06 21:19:35,381 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 53 [2019-11-06 21:19:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:19:35,381 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2019-11-06 21:19:35,381 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 21:19:35,382 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2019-11-06 21:19:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 21:19:35,383 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:19:35,383 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 21:19:35,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:19:35,587 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:19:35,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:19:35,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2044789832, now seen corresponding path program 2 times [2019-11-06 21:19:35,588 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:19:35,589 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910519335] [2019-11-06 21:19:35,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:19:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:35,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:35,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:19:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 21:19:36,848 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910519335] [2019-11-06 21:19:36,848 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700465759] [2019-11-06 21:19:36,848 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 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 [2019-11-06 21:19:36,975 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 21:19:36,976 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:19:36,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 116 conjunts are in the unsatisfiable core [2019-11-06 21:19:36,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:19:37,034 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-06 21:19:37,034 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:19:37,039 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:37,039 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:19:37,040 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-06 21:19:37,190 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:37,191 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 [2019-11-06 21:19:37,191 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:19:37,201 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:37,201 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:19:37,201 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:8 [2019-11-06 21:19:37,250 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 [2019-11-06 21:19:37,250 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:19:37,259 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:37,263 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 [2019-11-06 21:19:37,263 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:19:37,270 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:37,271 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:19:37,271 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:30, output treesize:12 [2019-11-06 21:19:37,703 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 29 treesize of output 19 [2019-11-06 21:19:37,703 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:19:37,712 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:37,713 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:19:37,713 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:120, output treesize:110 [2019-11-06 21:19:37,806 INFO L392 ElimStorePlain]: Different costs {2=[|v_old(#memory_$Pointer$.offset)_AFTER_CALL_17|], 6=[|v_#memory_$Pointer$.base_BEFORE_CALL_2|]} [2019-11-06 21:19:37,813 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 21:19:37,815 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 86 [2019-11-06 21:19:37,816 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:19:37,826 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:37,833 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-06 21:19:37,872 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:37,873 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 165 [2019-11-06 21:19:37,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 21:19:37,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:19:37,879 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:19:37,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:19:37,882 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 3 xjuncts. [2019-11-06 21:19:37,924 INFO L567 ElimStorePlain]: treesize reduction 315, result has 9.7 percent of original size [2019-11-06 21:19:37,924 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:19:37,925 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:125, output treesize:33 [2019-11-06 21:19:42,694 WARN L191 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 27 [2019-11-06 21:19:42,714 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 45 treesize of output 29 [2019-11-06 21:19:42,715 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:19:42,728 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:42,732 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 21:19:42,733 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 37 treesize of output 25 [2019-11-06 21:19:42,733 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:19:42,744 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:42,749 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 33 treesize of output 32 [2019-11-06 21:19:42,750 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-06 21:19:42,757 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:42,758 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:19:42,758 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:74, output treesize:33 [2019-11-06 21:19:43,308 INFO L392 ElimStorePlain]: Different costs {1=[|#memory_$Pointer$.base|, |#memory_$Pointer$.offset|], 2=[|#memory_int|]} [2019-11-06 21:19:43,315 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:43,316 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 78 treesize of output 66 [2019-11-06 21:19:43,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:19:43,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:19:43,323 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-06 21:19:43,345 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:43,353 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:43,353 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 46 [2019-11-06 21:19:43,354 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:19:43,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:19:43,358 INFO L496 ElimStorePlain]: Start of recursive call 3: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-06 21:19:43,382 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:43,394 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:43,395 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2019-11-06 21:19:43,395 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-06 21:19:43,423 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 21:19:43,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:19:43,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:19:43,426 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:19:43,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:19:43,433 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:19:43,440 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 21:19:43,440 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:92, output treesize:19 [2019-11-06 21:19:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 21:19:43,557 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:19:43,557 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 52 [2019-11-06 21:19:43,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907065135] [2019-11-06 21:19:43,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-06 21:19:43,558 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:19:43,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-06 21:19:43,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2501, Unknown=6, NotChecked=0, Total=2652 [2019-11-06 21:19:43,560 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 52 states. [2019-11-06 21:19:57,197 WARN L191 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 36