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/sll2c_remove_all_reverse.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 16:30:05,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 16:30:05,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 16:30:05,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 16:30:05,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 16:30:05,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 16:30:05,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 16:30:05,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 16:30:05,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 16:30:05,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 16:30:05,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 16:30:05,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 16:30:05,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 16:30:05,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 16:30:05,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 16:30:05,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 16:30:05,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 16:30:05,364 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 16:30:05,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 16:30:05,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 16:30:05,370 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 16:30:05,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 16:30:05,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 16:30:05,374 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 16:30:05,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-16 16:30:05,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-16 16:30:05,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-16 16:30:05,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-16 16:30:05,379 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-16 16:30:05,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-16 16:30:05,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-16 16:30:05,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-16 16:30:05,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-16 16:30:05,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-16 16:30:05,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-16 16:30:05,385 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-16 16:30:05,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-16 16:30:05,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-16 16:30:05,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 16:30:05,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 16:30:05,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 16:30:05,390 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 [2019-09-16 16:30:05,406 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 16:30:05,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 16:30:05,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-16 16:30:05,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-16 16:30:05,408 INFO L138 SettingsManager]: * Use SBE=true [2019-09-16 16:30:05,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 16:30:05,408 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 16:30:05,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-16 16:30:05,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 16:30:05,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 16:30:05,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 16:30:05,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 16:30:05,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 16:30:05,410 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 16:30:05,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 16:30:05,410 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-16 16:30:05,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 16:30:05,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 16:30:05,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 16:30:05,411 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-16 16:30:05,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-16 16:30:05,411 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 16:30:05,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 16:30:05,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 16:30:05,412 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-16 16:30:05,412 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-16 16:30:05,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 16:30:05,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-16 16:30:05,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 16:30:05,463 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 16:30:05,477 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 16:30:05,483 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 16:30:05,485 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 16:30:05,485 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 16:30:05,486 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i [2019-09-16 16:30:05,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a37c5e05b/02578983b66f4e3f81c94ec22df4b2dc/FLAGa3e0e9889 [2019-09-16 16:30:06,094 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 16:30:06,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all_reverse.i [2019-09-16 16:30:06,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a37c5e05b/02578983b66f4e3f81c94ec22df4b2dc/FLAGa3e0e9889 [2019-09-16 16:30:06,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a37c5e05b/02578983b66f4e3f81c94ec22df4b2dc [2019-09-16 16:30:06,385 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 16:30:06,387 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 16:30:06,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 16:30:06,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 16:30:06,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 16:30:06,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:30:06" (1/1) ... [2019-09-16 16:30:06,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@545a310a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:30:06, skipping insertion in model container [2019-09-16 16:30:06,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:30:06" (1/1) ... [2019-09-16 16:30:06,402 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 16:30:06,461 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 16:30:06,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:30:06,959 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 16:30:07,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:30:07,119 INFO L192 MainTranslator]: Completed translation [2019-09-16 16:30:07,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:30:07 WrapperNode [2019-09-16 16:30:07,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 16:30:07,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 16:30:07,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 16:30:07,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 16:30:07,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:30:07" (1/1) ... [2019-09-16 16:30:07,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:30:07" (1/1) ... [2019-09-16 16:30:07,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:30:07" (1/1) ... [2019-09-16 16:30:07,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:30:07" (1/1) ... [2019-09-16 16:30:07,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:30:07" (1/1) ... [2019-09-16 16:30:07,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:30:07" (1/1) ... [2019-09-16 16:30:07,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:30:07" (1/1) ... [2019-09-16 16:30:07,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 16:30:07,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 16:30:07,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 16:30:07,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 16:30:07,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:30:07" (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 [2019-09-16 16:30:07,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 16:30:07,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 16:30:07,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-09-16 16:30:07,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-09-16 16:30:07,289 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-09-16 16:30:07,289 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-09-16 16:30:07,289 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2019-09-16 16:30:07,289 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_remove_last [2019-09-16 16:30:07,289 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 16:30:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 16:30:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-09-16 16:30:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-09-16 16:30:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-09-16 16:30:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-09-16 16:30:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-09-16 16:30:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-09-16 16:30:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-09-16 16:30:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-09-16 16:30:07,292 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-09-16 16:30:07,292 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-09-16 16:30:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-09-16 16:30:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-09-16 16:30:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-09-16 16:30:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-09-16 16:30:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-09-16 16:30:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-09-16 16:30:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-09-16 16:30:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-09-16 16:30:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-09-16 16:30:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-09-16 16:30:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-09-16 16:30:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-09-16 16:30:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-09-16 16:30:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-09-16 16:30:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-09-16 16:30:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-09-16 16:30:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-09-16 16:30:07,297 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-09-16 16:30:07,297 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-09-16 16:30:07,297 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-09-16 16:30:07,298 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-09-16 16:30:07,298 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-09-16 16:30:07,298 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-09-16 16:30:07,298 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-09-16 16:30:07,298 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-09-16 16:30:07,298 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-09-16 16:30:07,299 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-09-16 16:30:07,299 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-09-16 16:30:07,299 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-09-16 16:30:07,299 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-09-16 16:30:07,300 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-09-16 16:30:07,300 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-09-16 16:30:07,301 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-09-16 16:30:07,301 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-09-16 16:30:07,302 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-09-16 16:30:07,302 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-09-16 16:30:07,302 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-09-16 16:30:07,302 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-09-16 16:30:07,302 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-09-16 16:30:07,303 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-09-16 16:30:07,303 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-09-16 16:30:07,303 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-09-16 16:30:07,303 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-09-16 16:30:07,303 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-09-16 16:30:07,304 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-09-16 16:30:07,304 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-09-16 16:30:07,305 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-09-16 16:30:07,305 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-09-16 16:30:07,306 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-09-16 16:30:07,306 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-09-16 16:30:07,306 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-09-16 16:30:07,307 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-09-16 16:30:07,307 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-09-16 16:30:07,307 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-09-16 16:30:07,308 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-09-16 16:30:07,308 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-16 16:30:07,308 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-09-16 16:30:07,308 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-09-16 16:30:07,308 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-09-16 16:30:07,309 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-09-16 16:30:07,309 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-09-16 16:30:07,309 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-09-16 16:30:07,310 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-09-16 16:30:07,310 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-09-16 16:30:07,310 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-09-16 16:30:07,311 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-09-16 16:30:07,311 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-09-16 16:30:07,312 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-09-16 16:30:07,312 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-09-16 16:30:07,312 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-09-16 16:30:07,312 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-09-16 16:30:07,313 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-09-16 16:30:07,313 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-09-16 16:30:07,314 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-09-16 16:30:07,314 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-09-16 16:30:07,314 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-09-16 16:30:07,314 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-09-16 16:30:07,314 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-09-16 16:30:07,314 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-09-16 16:30:07,314 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-09-16 16:30:07,315 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-09-16 16:30:07,315 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-09-16 16:30:07,315 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-09-16 16:30:07,315 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-09-16 16:30:07,315 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-09-16 16:30:07,315 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-09-16 16:30:07,315 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-09-16 16:30:07,316 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-09-16 16:30:07,316 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-09-16 16:30:07,316 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-09-16 16:30:07,316 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-09-16 16:30:07,316 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-09-16 16:30:07,316 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-09-16 16:30:07,316 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-09-16 16:30:07,317 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-09-16 16:30:07,317 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-09-16 16:30:07,317 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-09-16 16:30:07,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-09-16 16:30:07,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-16 16:30:07,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-16 16:30:07,318 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2019-09-16 16:30:07,318 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_remove_last [2019-09-16 16:30:07,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-16 16:30:07,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-16 16:30:07,318 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 16:30:07,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-16 16:30:07,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-09-16 16:30:07,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 16:30:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 16:30:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-16 16:30:07,645 INFO L683 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-09-16 16:30:07,874 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 16:30:07,875 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-09-16 16:30:07,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:30:07 BoogieIcfgContainer [2019-09-16 16:30:07,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 16:30:07,877 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 16:30:07,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 16:30:07,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 16:30:07,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 04:30:06" (1/3) ... [2019-09-16 16:30:07,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5bec67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:30:07, skipping insertion in model container [2019-09-16 16:30:07,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:30:07" (2/3) ... [2019-09-16 16:30:07,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5bec67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:30:07, skipping insertion in model container [2019-09-16 16:30:07,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:30:07" (3/3) ... [2019-09-16 16:30:07,884 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all_reverse.i [2019-09-16 16:30:07,894 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 16:30:07,903 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 16:30:07,919 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 16:30:07,943 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-16 16:30:07,943 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 16:30:07,944 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-16 16:30:07,944 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 16:30:07,944 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 16:30:07,944 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 16:30:07,944 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 16:30:07,944 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 16:30:07,944 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 16:30:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2019-09-16 16:30:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-16 16:30:07,969 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:30:07,971 INFO L407 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] [2019-09-16 16:30:07,972 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:30:07,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:30:07,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1597421219, now seen corresponding path program 1 times [2019-09-16 16:30:07,979 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:30:07,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:30:08,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:08,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:30:08,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:30:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:30:08,176 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:30:08,176 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 16:30:08,181 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 16:30:08,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 16:30:08,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 16:30:08,199 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 2 states. [2019-09-16 16:30:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:30:08,223 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2019-09-16 16:30:08,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 16:30:08,225 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2019-09-16 16:30:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:30:08,232 INFO L225 Difference]: With dead ends: 71 [2019-09-16 16:30:08,233 INFO L226 Difference]: Without dead ends: 39 [2019-09-16 16:30:08,235 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 16:30:08,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-16 16:30:08,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-16 16:30:08,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-16 16:30:08,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2019-09-16 16:30:08,276 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 24 [2019-09-16 16:30:08,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:30:08,278 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2019-09-16 16:30:08,278 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 16:30:08,279 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2019-09-16 16:30:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-16 16:30:08,281 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:30:08,281 INFO L407 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] [2019-09-16 16:30:08,281 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:30:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:30:08,282 INFO L82 PathProgramCache]: Analyzing trace with hash 657162430, now seen corresponding path program 1 times [2019-09-16 16:30:08,282 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:30:08,282 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:30:08,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:08,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:30:08,288 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:30:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:30:08,446 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:30:08,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-16 16:30:08,449 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 16:30:08,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 16:30:08,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-16 16:30:08,451 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 5 states. [2019-09-16 16:30:08,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:30:08,567 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2019-09-16 16:30:08,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 16:30:08,569 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-09-16 16:30:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:30:08,571 INFO L225 Difference]: With dead ends: 63 [2019-09-16 16:30:08,571 INFO L226 Difference]: Without dead ends: 42 [2019-09-16 16:30:08,573 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-16 16:30:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-09-16 16:30:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-09-16 16:30:08,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-16 16:30:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2019-09-16 16:30:08,595 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 24 [2019-09-16 16:30:08,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:30:08,595 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2019-09-16 16:30:08,595 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 16:30:08,596 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2019-09-16 16:30:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-16 16:30:08,598 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:30:08,598 INFO L407 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] [2019-09-16 16:30:08,598 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:30:08,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:30:08,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1280322166, now seen corresponding path program 1 times [2019-09-16 16:30:08,599 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:30:08,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:30:08,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:08,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:30:08,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:30:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-16 16:30:08,755 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:30:08,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-16 16:30:08,756 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-16 16:30:08,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-16 16:30:08,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-16 16:30:08,756 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 4 states. [2019-09-16 16:30:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:30:08,799 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2019-09-16 16:30:08,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 16:30:08,800 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-09-16 16:30:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:30:08,802 INFO L225 Difference]: With dead ends: 47 [2019-09-16 16:30:08,802 INFO L226 Difference]: Without dead ends: 43 [2019-09-16 16:30:08,803 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-16 16:30:08,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-16 16:30:08,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2019-09-16 16:30:08,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-16 16:30:08,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2019-09-16 16:30:08,811 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 32 [2019-09-16 16:30:08,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:30:08,811 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2019-09-16 16:30:08,811 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-16 16:30:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2019-09-16 16:30:08,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-16 16:30:08,813 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:30:08,813 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:30:08,813 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:30:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:30:08,814 INFO L82 PathProgramCache]: Analyzing trace with hash 410004661, now seen corresponding path program 1 times [2019-09-16 16:30:08,814 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:30:08,814 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:30:08,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:08,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:30:08,818 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:30:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-16 16:30:08,945 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:30:08,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-16 16:30:08,945 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-16 16:30:08,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-16 16:30:08,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-16 16:30:08,946 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 6 states. [2019-09-16 16:30:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:30:09,103 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2019-09-16 16:30:09,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 16:30:09,104 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2019-09-16 16:30:09,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:30:09,105 INFO L225 Difference]: With dead ends: 58 [2019-09-16 16:30:09,105 INFO L226 Difference]: Without dead ends: 41 [2019-09-16 16:30:09,106 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-09-16 16:30:09,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-09-16 16:30:09,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-09-16 16:30:09,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-16 16:30:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-09-16 16:30:09,113 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 42 [2019-09-16 16:30:09,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:30:09,113 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-09-16 16:30:09,114 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-16 16:30:09,114 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-09-16 16:30:09,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-16 16:30:09,115 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:30:09,115 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:30:09,116 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:30:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:30:09,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1436962146, now seen corresponding path program 1 times [2019-09-16 16:30:09,116 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:30:09,116 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:30:09,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:09,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:30:09,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:30:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-16 16:30:09,200 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:30:09,200 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-16 16:30:09,201 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-16 16:30:09,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-16 16:30:09,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-16 16:30:09,201 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 4 states. [2019-09-16 16:30:09,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:30:09,255 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-09-16 16:30:09,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 16:30:09,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2019-09-16 16:30:09,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:30:09,257 INFO L225 Difference]: With dead ends: 62 [2019-09-16 16:30:09,257 INFO L226 Difference]: Without dead ends: 43 [2019-09-16 16:30:09,257 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-16 16:30:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-16 16:30:09,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-09-16 16:30:09,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-16 16:30:09,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-09-16 16:30:09,264 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 45 [2019-09-16 16:30:09,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:30:09,265 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-09-16 16:30:09,265 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-16 16:30:09,265 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-09-16 16:30:09,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-16 16:30:09,267 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:30:09,267 INFO L407 BasicCegarLoop]: trace histogram [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, 1, 1] [2019-09-16 16:30:09,267 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:30:09,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:30:09,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1302090595, now seen corresponding path program 1 times [2019-09-16 16:30:09,268 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:30:09,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:30:09,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:09,271 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:30:09,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:09,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:30:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-16 16:30:09,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:30:09,417 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:30:09,511 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:30:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:30:09,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-16 16:30:09,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:30:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-16 16:30:09,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:30:09,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-09-16 16:30:09,677 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-16 16:30:09,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-16 16:30:09,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-09-16 16:30:09,678 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 7 states. [2019-09-16 16:30:09,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:30:09,752 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2019-09-16 16:30:09,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-16 16:30:09,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2019-09-16 16:30:09,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:30:09,756 INFO L225 Difference]: With dead ends: 52 [2019-09-16 16:30:09,756 INFO L226 Difference]: Without dead ends: 48 [2019-09-16 16:30:09,757 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-09-16 16:30:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-16 16:30:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2019-09-16 16:30:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-16 16:30:09,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2019-09-16 16:30:09,769 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 47 [2019-09-16 16:30:09,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:30:09,771 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2019-09-16 16:30:09,771 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-16 16:30:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2019-09-16 16:30:09,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-09-16 16:30:09,773 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:30:09,774 INFO L407 BasicCegarLoop]: trace histogram [4, 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] [2019-09-16 16:30:09,774 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:30:09,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:30:09,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1450863914, now seen corresponding path program 2 times [2019-09-16 16:30:09,776 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:30:09,776 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:30:09,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:09,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:30:09,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:30:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-16 16:30:11,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:30:11,051 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:30:11,118 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:30:11,202 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:30:11,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:30:11,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 87 conjunts are in the unsatisfiable core [2019-09-16 16:30:11,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:30:11,460 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 [2019-09-16 16:30:11,460 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-16 16:30:11,469 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-16 16:30:11,470 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. [2019-09-16 16:30:11,470 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:16 [2019-09-16 16:30:11,932 INFO L341 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2019-09-16 16:30:11,933 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2019-09-16 16:30:11,934 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-09-16 16:30:11,945 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-16 16:30:11,950 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-09-16 16:30:11,952 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 54 treesize of output 40 [2019-09-16 16:30:11,953 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-09-16 16:30:11,962 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-16 16:30:11,963 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-09-16 16:30:11,963 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:74, output treesize:46 [2019-09-16 16:30:12,123 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-16 16:30:12,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:30:12,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 39 [2019-09-16 16:30:12,136 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-16 16:30:12,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-16 16:30:12,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1386, Unknown=0, NotChecked=0, Total=1482 [2019-09-16 16:30:12,138 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 39 states. [2019-09-16 16:30:13,849 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2019-09-16 16:30:14,041 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2019-09-16 16:30:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:30:15,230 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2019-09-16 16:30:15,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-16 16:30:15,231 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 62 [2019-09-16 16:30:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:30:15,235 INFO L225 Difference]: With dead ends: 106 [2019-09-16 16:30:15,235 INFO L226 Difference]: Without dead ends: 80 [2019-09-16 16:30:15,238 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=342, Invalid=4214, Unknown=0, NotChecked=0, Total=4556 [2019-09-16 16:30:15,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-09-16 16:30:15,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 53. [2019-09-16 16:30:15,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-16 16:30:15,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2019-09-16 16:30:15,247 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 62 [2019-09-16 16:30:15,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:30:15,247 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2019-09-16 16:30:15,247 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-16 16:30:15,247 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2019-09-16 16:30:15,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-16 16:30:15,249 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:30:15,249 INFO L407 BasicCegarLoop]: trace histogram [4, 3, 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] [2019-09-16 16:30:15,249 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:30:15,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:30:15,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1060298193, now seen corresponding path program 1 times [2019-09-16 16:30:15,250 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:30:15,250 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:30:15,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:15,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:30:15,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:30:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:30:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-09-16 16:30:15,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:30:15,332 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:30:15,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:30:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:30:15,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-16 16:30:15,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:30:15,512 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-09-16 16:30:15,513 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 48 [2019-09-16 16:30:15,515 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:30:15,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:30:15,519 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-09-16 16:30:15,532 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-09-16 16:30:15,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:30:15,734 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: expected NNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive$TermWalker.walk(NonRecursive.java:139) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:195) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder.(ArrayOccurrenceAnalysis.java:181) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis.(ArrayOccurrenceAnalysis.java:74) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:275) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:245) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:200) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:292) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructForwardBackward(TraceCheckConstructor.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:188) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:461) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-09-16 16:30:15,740 INFO L168 Benchmark]: Toolchain (without parser) took 9353.26 ms. Allocated memory was 141.0 MB in the beginning and 353.9 MB in the end (delta: 212.9 MB). Free memory was 87.2 MB in the beginning and 231.1 MB in the end (delta: -143.9 MB). Peak memory consumption was 69.0 MB. Max. memory is 7.1 GB. [2019-09-16 16:30:15,740 INFO L168 Benchmark]: CDTParser took 0.52 ms. Allocated memory is still 141.0 MB. Free memory was 107.1 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 16:30:15,741 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.78 ms. Allocated memory was 141.0 MB in the beginning and 199.8 MB in the end (delta: 58.7 MB). Free memory was 87.0 MB in the beginning and 161.8 MB in the end (delta: -74.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2019-09-16 16:30:15,742 INFO L168 Benchmark]: Boogie Preprocessor took 94.14 ms. Allocated memory is still 199.8 MB. Free memory was 161.8 MB in the beginning and 158.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2019-09-16 16:30:15,750 INFO L168 Benchmark]: RCFGBuilder took 660.78 ms. Allocated memory is still 199.8 MB. Free memory was 158.2 MB in the beginning and 111.5 MB in the end (delta: 46.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 7.1 GB. [2019-09-16 16:30:15,751 INFO L168 Benchmark]: TraceAbstraction took 7860.56 ms. Allocated memory was 199.8 MB in the beginning and 353.9 MB in the end (delta: 154.1 MB). Free memory was 110.9 MB in the beginning and 231.1 MB in the end (delta: -120.1 MB). Peak memory consumption was 34.0 MB. Max. memory is 7.1 GB. [2019-09-16 16:30:15,755 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.52 ms. Allocated memory is still 141.0 MB. Free memory was 107.1 MB in the beginning and 106.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 732.78 ms. Allocated memory was 141.0 MB in the beginning and 199.8 MB in the end (delta: 58.7 MB). Free memory was 87.0 MB in the beginning and 161.8 MB in the end (delta: -74.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 94.14 ms. Allocated memory is still 199.8 MB. Free memory was 161.8 MB in the beginning and 158.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 660.78 ms. Allocated memory is still 199.8 MB. Free memory was 158.2 MB in the beginning and 111.5 MB in the end (delta: 46.7 MB). Peak memory consumption was 46.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7860.56 ms. Allocated memory was 199.8 MB in the beginning and 353.9 MB in the end (delta: 154.1 MB). Free memory was 110.9 MB in the beginning and 231.1 MB in the end (delta: -120.1 MB). Peak memory consumption was 34.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: expected NNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: expected NNF: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.arrays.ArrayOccurrenceAnalysis$ArrOccFinder$MyWalker.walk(ArrayOccurrenceAnalysis.java:236) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...