/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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-properties/alternating_list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:32:40,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:32:40,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:32:40,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:32:40,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:32:40,576 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:32:40,579 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:32:40,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:32:40,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:32:40,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:32:40,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:32:40,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:32:40,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:32:40,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:32:40,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:32:40,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:32:40,617 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:32:40,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:32:40,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:32:40,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:32:40,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:32:40,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:32:40,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:32:40,642 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:32:40,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-23 20:32:40,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-23 20:32:40,651 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-23 20:32:40,653 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-23 20:32:40,654 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-23 20:32:40,655 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-23 20:32:40,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-23 20:32:40,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-23 20:32:40,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-23 20:32:40,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-23 20:32:40,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-23 20:32:40,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-23 20:32:40,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-23 20:32:40,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-23 20:32:40,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:32:40,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:32:40,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:32:40,664 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:32:40,688 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:32:40,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:32:40,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:32:40,693 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:32:40,693 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:32:40,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:32:40,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:32:40,694 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:32:40,694 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:32:40,695 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:32:40,696 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:32:40,696 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:32:40,696 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:32:40,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:32:40,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:32:40,698 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:32:40,698 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:32:40,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:32:40,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:32:40,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:32:40,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:32:40,699 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:32:40,700 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:32:41,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:32:41,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:32:41,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:32:41,143 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:32:41,143 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:32:41,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-10-23 20:32:41,232 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeea56805/532e1e855db345eeafaa808eb2178870/FLAG9b5474339 [2020-10-23 20:32:42,024 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:32:42,025 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-10-23 20:32:42,045 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeea56805/532e1e855db345eeafaa808eb2178870/FLAG9b5474339 [2020-10-23 20:32:42,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eeea56805/532e1e855db345eeafaa808eb2178870 [2020-10-23 20:32:42,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:32:42,295 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:32:42,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:32:42,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:32:42,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:32:42,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:32:42" (1/1) ... [2020-10-23 20:32:42,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11e6dd4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:42, skipping insertion in model container [2020-10-23 20:32:42,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:32:42" (1/1) ... [2020-10-23 20:32:42,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:32:42,373 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:32:42,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:32:42,722 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:32:42,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:32:42,820 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:32:42,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:42 WrapperNode [2020-10-23 20:32:42,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:32:42,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:32:42,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:32:42,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:32:42,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:42" (1/1) ... [2020-10-23 20:32:42,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:42" (1/1) ... [2020-10-23 20:32:42,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:42" (1/1) ... [2020-10-23 20:32:42,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:42" (1/1) ... [2020-10-23 20:32:42,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:42" (1/1) ... [2020-10-23 20:32:42,879 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:42" (1/1) ... [2020-10-23 20:32:42,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:42" (1/1) ... [2020-10-23 20:32:42,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:32:42,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:32:42,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:32:42,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:32:42,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:42" (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 [2020-10-23 20:32:43,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:32:43,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:32:43,005 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:32:43,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-23 20:32:43,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-23 20:32:43,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-23 20:32:43,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-23 20:32:43,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-23 20:32:43,006 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-23 20:32:43,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:32:43,006 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:32:43,006 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:32:43,007 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 20:32:43,007 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 20:32:43,007 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:32:43,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:32:43,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:32:43,008 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-23 20:32:43,008 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-23 20:32:43,008 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-23 20:32:43,009 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-23 20:32:43,009 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-23 20:32:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-23 20:32:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-23 20:32:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-23 20:32:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-23 20:32:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-23 20:32:43,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-23 20:32:43,013 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-23 20:32:43,013 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-23 20:32:43,013 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-23 20:32:43,013 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-23 20:32:43,013 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-23 20:32:43,013 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-23 20:32:43,013 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-23 20:32:43,014 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-23 20:32:43,014 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-23 20:32:43,014 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-23 20:32:43,014 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-23 20:32:43,014 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-23 20:32:43,014 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-23 20:32:43,014 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-23 20:32:43,014 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-23 20:32:43,015 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-23 20:32:43,015 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-23 20:32:43,015 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-23 20:32:43,015 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-23 20:32:43,015 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-23 20:32:43,015 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-23 20:32:43,015 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-23 20:32:43,016 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-23 20:32:43,016 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-23 20:32:43,016 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-23 20:32:43,016 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-23 20:32:43,016 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-23 20:32:43,016 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-23 20:32:43,016 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-23 20:32:43,016 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-23 20:32:43,017 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-23 20:32:43,017 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-23 20:32:43,017 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-23 20:32:43,018 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-23 20:32:43,018 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-23 20:32:43,019 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-23 20:32:43,019 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-23 20:32:43,019 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-23 20:32:43,019 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-23 20:32:43,019 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-23 20:32:43,019 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-23 20:32:43,019 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-23 20:32:43,020 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-23 20:32:43,020 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-23 20:32:43,020 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-23 20:32:43,020 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-23 20:32:43,020 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-23 20:32:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-23 20:32:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-23 20:32:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-23 20:32:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-23 20:32:43,021 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-23 20:32:43,022 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-23 20:32:43,022 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-23 20:32:43,022 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-23 20:32:43,022 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-23 20:32:43,022 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-23 20:32:43,023 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-23 20:32:43,023 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-23 20:32:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-23 20:32:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-23 20:32:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-23 20:32:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-23 20:32:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-23 20:32:43,025 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-23 20:32:43,025 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-23 20:32:43,026 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-23 20:32:43,026 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-23 20:32:43,026 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-23 20:32:43,026 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-23 20:32:43,026 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-23 20:32:43,027 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-23 20:32:43,027 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-23 20:32:43,027 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-23 20:32:43,027 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-23 20:32:43,027 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-23 20:32:43,027 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-23 20:32:43,027 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-23 20:32:43,028 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-23 20:32:43,028 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-23 20:32:43,028 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-23 20:32:43,028 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-23 20:32:43,028 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-23 20:32:43,028 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-23 20:32:43,029 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-23 20:32:43,029 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-23 20:32:43,029 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-23 20:32:43,029 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-23 20:32:43,029 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-23 20:32:43,029 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-23 20:32:43,029 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-23 20:32:43,029 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-23 20:32:43,030 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-23 20:32:43,030 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-23 20:32:43,030 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-23 20:32:43,030 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-23 20:32:43,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:32:43,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-23 20:32:43,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:32:43,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-23 20:32:43,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-23 20:32:43,031 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:32:43,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:32:43,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:32:43,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:32:43,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:32:43,452 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-23 20:32:43,619 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:32:43,619 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 20:32:43,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:32:43 BoogieIcfgContainer [2020-10-23 20:32:43,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:32:43,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:32:43,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:32:43,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:32:43,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:32:42" (1/3) ... [2020-10-23 20:32:43,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252193a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:32:43, skipping insertion in model container [2020-10-23 20:32:43,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:32:42" (2/3) ... [2020-10-23 20:32:43,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252193a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:32:43, skipping insertion in model container [2020-10-23 20:32:43,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:32:43" (3/3) ... [2020-10-23 20:32:43,633 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-10-23 20:32:43,645 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:32:43,653 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:32:43,675 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:32:43,715 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:32:43,715 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:32:43,715 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:32:43,715 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:32:43,715 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:32:43,716 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:32:43,716 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:32:43,716 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:32:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2020-10-23 20:32:43,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 20:32:43,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:32:43,757 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] [2020-10-23 20:32:43,757 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:32:43,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:32:43,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1333801285, now seen corresponding path program 1 times [2020-10-23 20:32:43,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:32:43,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655875453] [2020-10-23 20:32:43,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:32:43,878 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:32:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:44,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:32:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:32:44,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655875453] [2020-10-23 20:32:44,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:32:44,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 20:32:44,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255913284] [2020-10-23 20:32:44,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 20:32:44,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:32:44,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 20:32:44,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 20:32:44,204 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 3 states. [2020-10-23 20:32:44,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:32:44,460 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2020-10-23 20:32:44,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 20:32:44,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-10-23 20:32:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:32:44,471 INFO L225 Difference]: With dead ends: 124 [2020-10-23 20:32:44,471 INFO L226 Difference]: Without dead ends: 57 [2020-10-23 20:32:44,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 20:32:44,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-23 20:32:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-23 20:32:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-23 20:32:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-23 20:32:44,522 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 32 [2020-10-23 20:32:44,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:32:44,523 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-23 20:32:44,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 20:32:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-23 20:32:44,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 20:32:44,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:32:44,525 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] [2020-10-23 20:32:44,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:32:44,526 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:32:44,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:32:44,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1756005530, now seen corresponding path program 1 times [2020-10-23 20:32:44,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:32:44,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793426408] [2020-10-23 20:32:44,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:32:44,533 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:32:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:44,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:32:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:32:44,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793426408] [2020-10-23 20:32:44,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:32:44,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 20:32:44,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455489419] [2020-10-23 20:32:44,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 20:32:44,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:32:44,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 20:32:44,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 20:32:44,696 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-10-23 20:32:44,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:32:44,927 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2020-10-23 20:32:44,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:32:44,928 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-10-23 20:32:44,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:32:44,931 INFO L225 Difference]: With dead ends: 115 [2020-10-23 20:32:44,931 INFO L226 Difference]: Without dead ends: 88 [2020-10-23 20:32:44,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 20:32:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-23 20:32:44,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 59. [2020-10-23 20:32:44,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 20:32:44,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-10-23 20:32:44,945 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 34 [2020-10-23 20:32:44,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:32:44,945 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-10-23 20:32:44,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 20:32:44,946 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-10-23 20:32:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 20:32:44,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:32:44,947 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, 1, 1, 1, 1] [2020-10-23 20:32:44,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:32:44,948 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:32:44,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:32:44,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1144250381, now seen corresponding path program 1 times [2020-10-23 20:32:44,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:32:44,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152138140] [2020-10-23 20:32:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:32:45,236 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2020-10-23 20:32:45,299 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:45,378 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:45,393 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:45,458 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:45,460 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:45,460 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:125 [2020-10-23 20:32:45,783 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 92 [2020-10-23 20:32:45,798 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:45,879 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:45,885 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:45,957 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-23 20:32:45,959 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-10-23 20:32:45,959 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:149, output treesize:125 [2020-10-23 20:32:46,044 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 20:32:46,049 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:32:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:32:46,077 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:32:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:32:46,104 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:32:46,159 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:32:46,160 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:32:46,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:32:46,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:32:46 BoogieIcfgContainer [2020-10-23 20:32:46,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:32:46,189 INFO L168 Benchmark]: Toolchain (without parser) took 3898.20 ms. Allocated memory was 160.4 MB in the beginning and 195.0 MB in the end (delta: 34.6 MB). Free memory was 135.1 MB in the beginning and 73.9 MB in the end (delta: 61.2 MB). Peak memory consumption was 96.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:32:46,191 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 160.4 MB. Free memory is still 133.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:32:46,192 INFO L168 Benchmark]: CACSL2BoogieTranslator took 521.72 ms. Allocated memory is still 160.4 MB. Free memory was 134.5 MB in the beginning and 112.8 MB in the end (delta: 21.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:32:46,193 INFO L168 Benchmark]: Boogie Preprocessor took 77.72 ms. Allocated memory is still 160.4 MB. Free memory was 112.8 MB in the beginning and 110.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-23 20:32:46,194 INFO L168 Benchmark]: RCFGBuilder took 721.40 ms. Allocated memory is still 160.4 MB. Free memory was 110.0 MB in the beginning and 98.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.2 MB. Max. memory is 8.0 GB. [2020-10-23 20:32:46,196 INFO L168 Benchmark]: TraceAbstraction took 2561.16 ms. Allocated memory was 160.4 MB in the beginning and 195.0 MB in the end (delta: 34.6 MB). Free memory was 97.5 MB in the beginning and 73.9 MB in the end (delta: 23.6 MB). Peak memory consumption was 58.2 MB. Max. memory is 8.0 GB. [2020-10-23 20:32:46,206 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 160.4 MB. Free memory is still 133.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 521.72 ms. Allocated memory is still 160.4 MB. Free memory was 134.5 MB in the beginning and 112.8 MB in the end (delta: 21.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 77.72 ms. Allocated memory is still 160.4 MB. Free memory was 112.8 MB in the beginning and 110.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 721.40 ms. Allocated memory is still 160.4 MB. Free memory was 110.0 MB in the beginning and 98.0 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2561.16 ms. Allocated memory was 160.4 MB in the beginning and 195.0 MB in the end (delta: 34.6 MB). Free memory was 97.5 MB in the beginning and 73.9 MB in the end (delta: 23.6 MB). Peak memory consumption was 58.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); [L534] COND FALSE !(a == 0) [L535] List t; [L536] List p = a; [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 2 [L540] flag = 0 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] flag = 1 [L553] EXPR p->h [L553] COND TRUE p->h != 3 [L554] COND TRUE \read(flag) [L555] flag = 0 [L556] EXPR p->h [L556] COND TRUE p->h != 1 [L573] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "alternating_list-2.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 106 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 46 SDslu, 178 SDs, 0 SdLazy, 204 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 29 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...