/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:25:49,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:25:49,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:25:49,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:25:49,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:25:49,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:25:49,364 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:25:49,378 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:25:49,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:25:49,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:25:49,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:25:49,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:25:49,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:25:49,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:25:49,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:25:49,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:25:49,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:25:49,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:25:49,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:25:49,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:25:49,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:25:49,413 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:25:49,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:25:49,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:25:49,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 13:25:49,418 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 13:25:49,418 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 13:25:49,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 13:25:49,421 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 13:25:49,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 13:25:49,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 13:25:49,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 13:25:49,426 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 13:25:49,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 13:25:49,428 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 13:25:49,428 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 13:25:49,430 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 13:25:49,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 13:25:49,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:25:49,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:25:49,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:25:49,434 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:25:49,447 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:25:49,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:25:49,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:25:49,450 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:25:49,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:25:49,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:25:49,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:25:49,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:25:49,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:25:49,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:25:49,452 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:25:49,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:25:49,453 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:25:49,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:25:49,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:25:49,453 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:25:49,454 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:25:49,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:25:49,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:25:49,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:25:49,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:25:49,455 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:25:49,455 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:25:49,726 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:25:49,740 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:25:49,743 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:25:49,745 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:25:49,745 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:25:49,746 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-07-07 13:25:49,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e63287357/755c55f699de4548901c2194781b4e89/FLAG42194cea7 [2020-07-07 13:25:50,370 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:25:50,371 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext3-properties/sll_length_check-1.i [2020-07-07 13:25:50,387 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e63287357/755c55f699de4548901c2194781b4e89/FLAG42194cea7 [2020-07-07 13:25:50,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e63287357/755c55f699de4548901c2194781b4e89 [2020-07-07 13:25:50,679 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:25:50,683 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:25:50,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:25:50,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:25:50,689 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:25:50,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:25:50" (1/1) ... [2020-07-07 13:25:50,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@630d686e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:25:50, skipping insertion in model container [2020-07-07 13:25:50,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:25:50" (1/1) ... [2020-07-07 13:25:50,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:25:50,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:25:51,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:25:51,231 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:25:51,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:25:51,340 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:25:51,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:25:51 WrapperNode [2020-07-07 13:25:51,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:25:51,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:25:51,342 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:25:51,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:25:51,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:25:51" (1/1) ... [2020-07-07 13:25:51,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:25:51" (1/1) ... [2020-07-07 13:25:51,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:25:51" (1/1) ... [2020-07-07 13:25:51,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:25:51" (1/1) ... [2020-07-07 13:25:51,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:25:51" (1/1) ... [2020-07-07 13:25:51,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:25:51" (1/1) ... [2020-07-07 13:25:51,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:25:51" (1/1) ... [2020-07-07 13:25:51,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:25:51,403 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:25:51,403 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:25:51,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:25:51,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:25:51" (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 [2020-07-07 13:25:51,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:25:51,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:25:51,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-07 13:25:51,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-07 13:25:51,466 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-07 13:25:51,466 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-07-07 13:25:51,466 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-07-07 13:25:51,466 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-07-07 13:25:51,467 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:25:51,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:25:51,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 13:25:51,467 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-07 13:25:51,467 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-07 13:25:51,467 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-07 13:25:51,468 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-07 13:25:51,468 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-07 13:25:51,468 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-07 13:25:51,468 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-07 13:25:51,468 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-07 13:25:51,468 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-07 13:25:51,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-07 13:25:51,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-07 13:25:51,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-07 13:25:51,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-07 13:25:51,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-07 13:25:51,469 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-07 13:25:51,470 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-07 13:25:51,470 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-07 13:25:51,470 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-07 13:25:51,470 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-07 13:25:51,470 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-07 13:25:51,470 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-07 13:25:51,471 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-07 13:25:51,471 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-07 13:25:51,471 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-07 13:25:51,471 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-07 13:25:51,471 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-07 13:25:51,471 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-07 13:25:51,472 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-07 13:25:51,472 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-07 13:25:51,472 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-07 13:25:51,472 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-07 13:25:51,472 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-07 13:25:51,472 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-07 13:25:51,472 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-07 13:25:51,473 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-07 13:25:51,473 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-07 13:25:51,473 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-07 13:25:51,473 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-07 13:25:51,473 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-07 13:25:51,473 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-07 13:25:51,474 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-07 13:25:51,474 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-07 13:25:51,474 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-07 13:25:51,474 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-07 13:25:51,474 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-07 13:25:51,474 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-07 13:25:51,474 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-07 13:25:51,475 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-07 13:25:51,475 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-07 13:25:51,475 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-07 13:25:51,475 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-07 13:25:51,475 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-07 13:25:51,475 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 13:25:51,476 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-07 13:25:51,476 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-07 13:25:51,476 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-07 13:25:51,476 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-07 13:25:51,476 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-07 13:25:51,476 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-07 13:25:51,476 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-07 13:25:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-07 13:25:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 13:25:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-07 13:25:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-07 13:25:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-07 13:25:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-07 13:25:51,477 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-07 13:25:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-07 13:25:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-07 13:25:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-07 13:25:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-07 13:25:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-07 13:25:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-07 13:25:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-07 13:25:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-07 13:25:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-07 13:25:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-07 13:25:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-07 13:25:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-07 13:25:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-07 13:25:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-07 13:25:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-07 13:25:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-07 13:25:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-07 13:25:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-07 13:25:51,480 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-07 13:25:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-07 13:25:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-07 13:25:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-07 13:25:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-07 13:25:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-07 13:25:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-07 13:25:51,481 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-07 13:25:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-07 13:25:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-07 13:25:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-07 13:25:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-07 13:25:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-07 13:25:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-07 13:25:51,482 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-07 13:25:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-07 13:25:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-07 13:25:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-07 13:25:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-07 13:25:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-07 13:25:51,483 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-07 13:25:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-07-07 13:25:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 13:25:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 13:25:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-07-07 13:25:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 13:25:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-07-07 13:25:51,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:25:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:25:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:25:51,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:25:51,819 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-07 13:25:52,062 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:25:52,062 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-07 13:25:52,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:25:52 BoogieIcfgContainer [2020-07-07 13:25:52,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:25:52,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:25:52,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:25:52,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:25:52,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:25:50" (1/3) ... [2020-07-07 13:25:52,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6286ca42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:25:52, skipping insertion in model container [2020-07-07 13:25:52,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:25:51" (2/3) ... [2020-07-07 13:25:52,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6286ca42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:25:52, skipping insertion in model container [2020-07-07 13:25:52,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:25:52" (3/3) ... [2020-07-07 13:25:52,077 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-07-07 13:25:52,088 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:25:52,096 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:25:52,110 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:25:52,133 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:25:52,133 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:25:52,133 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:25:52,136 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:25:52,137 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:25:52,137 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:25:52,137 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:25:52,137 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:25:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states. [2020-07-07 13:25:52,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-07 13:25:52,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:25:52,165 INFO L422 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] [2020-07-07 13:25:52,165 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:25:52,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:25:52,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1731717969, now seen corresponding path program 1 times [2020-07-07 13:25:52,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:25:52,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116809234] [2020-07-07 13:25:52,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:25:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:25:52,419 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:25:52,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116809234] [2020-07-07 13:25:52,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:25:52,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 13:25:52,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348709848] [2020-07-07 13:25:52,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 13:25:52,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:25:52,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 13:25:52,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 13:25:52,449 INFO L87 Difference]: Start difference. First operand 75 states. Second operand 4 states. [2020-07-07 13:25:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:25:52,724 INFO L93 Difference]: Finished difference Result 154 states and 184 transitions. [2020-07-07 13:25:52,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-07 13:25:52,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-07-07 13:25:52,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:25:52,737 INFO L225 Difference]: With dead ends: 154 [2020-07-07 13:25:52,737 INFO L226 Difference]: Without dead ends: 68 [2020-07-07 13:25:52,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 13:25:52,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-07 13:25:52,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2020-07-07 13:25:52,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-07 13:25:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-07-07 13:25:52,800 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 29 [2020-07-07 13:25:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:25:52,801 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-07-07 13:25:52,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 13:25:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-07-07 13:25:52,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 13:25:52,802 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:25:52,803 INFO L422 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] [2020-07-07 13:25:52,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:25:52,803 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:25:52,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:25:52,804 INFO L82 PathProgramCache]: Analyzing trace with hash 632987872, now seen corresponding path program 1 times [2020-07-07 13:25:52,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:25:52,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691424381] [2020-07-07 13:25:52,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:25:52,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:25:52,936 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:25:52,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691424381] [2020-07-07 13:25:52,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:25:52,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 13:25:52,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231495887] [2020-07-07 13:25:52,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 13:25:52,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:25:52,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 13:25:52,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 13:25:52,939 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 6 states. [2020-07-07 13:25:53,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:25:53,279 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2020-07-07 13:25:53,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 13:25:53,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-07-07 13:25:53,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:25:53,283 INFO L225 Difference]: With dead ends: 143 [2020-07-07 13:25:53,283 INFO L226 Difference]: Without dead ends: 96 [2020-07-07 13:25:53,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-07-07 13:25:53,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-07 13:25:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 57. [2020-07-07 13:25:53,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 13:25:53,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-07-07 13:25:53,301 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 33 [2020-07-07 13:25:53,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:25:53,301 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-07-07 13:25:53,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 13:25:53,302 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-07-07 13:25:53,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-07 13:25:53,303 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:25:53,303 INFO L422 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] [2020-07-07 13:25:53,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 13:25:53,304 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:25:53,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:25:53,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1134974621, now seen corresponding path program 1 times [2020-07-07 13:25:53,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:25:53,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22354232] [2020-07-07 13:25:53,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:25:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:53,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:25:53,434 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:25:53,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22354232] [2020-07-07 13:25:53,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:25:53,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 13:25:53,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474783669] [2020-07-07 13:25:53,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 13:25:53,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:25:53,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 13:25:53,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 13:25:53,436 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 7 states. [2020-07-07 13:25:53,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:25:53,807 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-07-07 13:25:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 13:25:53,809 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-07-07 13:25:53,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:25:53,811 INFO L225 Difference]: With dead ends: 114 [2020-07-07 13:25:53,811 INFO L226 Difference]: Without dead ends: 94 [2020-07-07 13:25:53,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-07 13:25:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-07-07 13:25:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 67. [2020-07-07 13:25:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-07 13:25:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-07-07 13:25:53,838 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 35 [2020-07-07 13:25:53,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:25:53,838 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-07-07 13:25:53,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 13:25:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-07-07 13:25:53,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-07 13:25:53,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:25:53,841 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2020-07-07 13:25:53,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 13:25:53,842 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:25:53,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:25:53,842 INFO L82 PathProgramCache]: Analyzing trace with hash 226602169, now seen corresponding path program 1 times [2020-07-07 13:25:53,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:25:53,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519141249] [2020-07-07 13:25:53,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:25:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:25:53,963 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:25:53,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519141249] [2020-07-07 13:25:53,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:25:53,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 13:25:53,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308862292] [2020-07-07 13:25:53,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 13:25:53,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:25:53,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 13:25:53,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-07 13:25:53,966 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 8 states. [2020-07-07 13:25:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:25:54,407 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2020-07-07 13:25:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 13:25:54,407 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-07-07 13:25:54,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:25:54,409 INFO L225 Difference]: With dead ends: 168 [2020-07-07 13:25:54,409 INFO L226 Difference]: Without dead ends: 117 [2020-07-07 13:25:54,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-07-07 13:25:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-07 13:25:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2020-07-07 13:25:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-07 13:25:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-07-07 13:25:54,443 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 43 [2020-07-07 13:25:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:25:54,443 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-07-07 13:25:54,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 13:25:54,444 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-07-07 13:25:54,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-07 13:25:54,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:25:54,449 INFO L422 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, 1, 1] [2020-07-07 13:25:54,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 13:25:54,449 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:25:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:25:54,452 INFO L82 PathProgramCache]: Analyzing trace with hash 360366586, now seen corresponding path program 1 times [2020-07-07 13:25:54,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:25:54,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438750605] [2020-07-07 13:25:54,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:25:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:25:54,681 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:25:54,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438750605] [2020-07-07 13:25:54,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:25:54,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 13:25:54,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38082382] [2020-07-07 13:25:54,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 13:25:54,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:25:54,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 13:25:54,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-07-07 13:25:54,684 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 12 states. [2020-07-07 13:25:55,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:25:55,153 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-07-07 13:25:55,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 13:25:55,153 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-07-07 13:25:55,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:25:55,157 INFO L225 Difference]: With dead ends: 101 [2020-07-07 13:25:55,157 INFO L226 Difference]: Without dead ends: 96 [2020-07-07 13:25:55,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2020-07-07 13:25:55,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-07 13:25:55,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-07-07 13:25:55,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-07 13:25:55,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2020-07-07 13:25:55,177 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 44 [2020-07-07 13:25:55,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:25:55,178 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2020-07-07 13:25:55,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 13:25:55,178 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2020-07-07 13:25:55,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-07-07 13:25:55,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:25:55,180 INFO L422 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] [2020-07-07 13:25:55,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 13:25:55,180 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:25:55,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:25:55,181 INFO L82 PathProgramCache]: Analyzing trace with hash -829611268, now seen corresponding path program 1 times [2020-07-07 13:25:55,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:25:55,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317012717] [2020-07-07 13:25:55,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:25:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:55,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 13:25:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 13:25:55,311 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:25:55,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317012717] [2020-07-07 13:25:55,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 13:25:55,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 13:25:55,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18941666] [2020-07-07 13:25:55,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 13:25:55,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 13:25:55,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 13:25:55,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-07 13:25:55,314 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand 9 states. [2020-07-07 13:25:55,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 13:25:55,686 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2020-07-07 13:25:55,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 13:25:55,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-07-07 13:25:55,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 13:25:55,688 INFO L225 Difference]: With dead ends: 117 [2020-07-07 13:25:55,688 INFO L226 Difference]: Without dead ends: 87 [2020-07-07 13:25:55,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-07-07 13:25:55,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-07 13:25:55,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-07-07 13:25:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-07 13:25:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2020-07-07 13:25:55,715 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 45 [2020-07-07 13:25:55,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 13:25:55,716 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2020-07-07 13:25:55,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 13:25:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2020-07-07 13:25:55,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-07 13:25:55,722 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:25:55,723 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:25:55,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 13:25:55,723 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:25:55,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:25:55,726 INFO L82 PathProgramCache]: Analyzing trace with hash -642872939, now seen corresponding path program 1 times [2020-07-07 13:25:55,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:25:55,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228681030] [2020-07-07 13:25:55,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:25:55,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 13:25:55,738 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:277) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) 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:317) 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) [2020-07-07 13:25:55,746 INFO L168 Benchmark]: Toolchain (without parser) took 5062.89 ms. Allocated memory was 139.5 MB in the beginning and 282.6 MB in the end (delta: 143.1 MB). Free memory was 101.8 MB in the beginning and 209.8 MB in the end (delta: -108.1 MB). Peak memory consumption was 35.1 MB. Max. memory is 7.1 GB. [2020-07-07 13:25:55,746 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory is still 121.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 13:25:55,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 656.14 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 101.8 MB in the beginning and 171.8 MB in the end (delta: -70.0 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:25:55,755 INFO L168 Benchmark]: Boogie Preprocessor took 61.13 ms. Allocated memory is still 204.5 MB. Free memory was 171.8 MB in the beginning and 168.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:25:55,756 INFO L168 Benchmark]: RCFGBuilder took 664.78 ms. Allocated memory is still 204.5 MB. Free memory was 168.9 MB in the beginning and 122.7 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:25:55,757 INFO L168 Benchmark]: TraceAbstraction took 3673.10 ms. Allocated memory was 204.5 MB in the beginning and 282.6 MB in the end (delta: 78.1 MB). Free memory was 122.7 MB in the beginning and 209.8 MB in the end (delta: -87.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 13:25:55,769 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory is still 121.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 656.14 ms. Allocated memory was 139.5 MB in the beginning and 204.5 MB in the end (delta: 65.0 MB). Free memory was 101.8 MB in the beginning and 171.8 MB in the end (delta: -70.0 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.13 ms. Allocated memory is still 204.5 MB. Free memory was 171.8 MB in the beginning and 168.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 664.78 ms. Allocated memory is still 204.5 MB. Free memory was 168.9 MB in the beginning and 122.7 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3673.10 ms. Allocated memory was 204.5 MB in the beginning and 282.6 MB in the end (delta: 78.1 MB). Free memory was 122.7 MB in the beginning and 209.8 MB in the end (delta: -87.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:442) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...