/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 0.2.1-dev-b7b32d2 [2021-02-21 20:36:39,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:36:39,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:36:39,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:36:39,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:36:39,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:36:39,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:36:39,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:36:39,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:36:39,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:36:39,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:36:39,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:36:39,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:36:39,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:36:39,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:36:39,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:36:39,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:36:39,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:36:39,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:36:39,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:36:39,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:36:39,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:36:39,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:36:39,325 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:36:39,330 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 20:36:39,330 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 20:36:39,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 20:36:39,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 20:36:39,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 20:36:39,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 20:36:39,333 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 20:36:39,334 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 20:36:39,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 20:36:39,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 20:36:39,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 20:36:39,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 20:36:39,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 20:36:39,339 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 20:36:39,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:36:39,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:36:39,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:36:39,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:36:39,355 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:36:39,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:36:39,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:36:39,358 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:36:39,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:36:39,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:36:39,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:36:39,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:36:39,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:36:39,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:36:39,359 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:36:39,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:36:39,360 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:36:39,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:36:39,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:36:39,360 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:36:39,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:36:39,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:36:39,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:36:39,361 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:36:39,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:36:39,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:36:39,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:36:39,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:36:39,814 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:36:39,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:36:39,818 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:36:39,819 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:36:39,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-2.i [2021-02-21 20:36:39,915 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c24c53c50/ab6a5a4cbb17434b8fc829a09ac7d6dc/FLAG6de16441f [2021-02-21 20:36:40,729 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:36:40,730 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/alternating_list-2.i [2021-02-21 20:36:40,751 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c24c53c50/ab6a5a4cbb17434b8fc829a09ac7d6dc/FLAG6de16441f [2021-02-21 20:36:40,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c24c53c50/ab6a5a4cbb17434b8fc829a09ac7d6dc [2021-02-21 20:36:40,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:36:40,976 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:36:40,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:36:40,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:36:40,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:36:40,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:36:40" (1/1) ... [2021-02-21 20:36:40,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d6a095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:40, skipping insertion in model container [2021-02-21 20:36:40,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:36:40" (1/1) ... [2021-02-21 20:36:40,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:36:41,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:36:41,403 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/alternating_list-2.i[23574,23587] [2021-02-21 20:36:41,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:36:41,422 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:36:41,497 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/alternating_list-2.i[23574,23587] [2021-02-21 20:36:41,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:36:41,559 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:36:41,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:41 WrapperNode [2021-02-21 20:36:41,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:36:41,561 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:36:41,561 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:36:41,561 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:36:41,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:41" (1/1) ... [2021-02-21 20:36:41,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:41" (1/1) ... [2021-02-21 20:36:41,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:41" (1/1) ... [2021-02-21 20:36:41,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:41" (1/1) ... [2021-02-21 20:36:41,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:41" (1/1) ... [2021-02-21 20:36:41,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:41" (1/1) ... [2021-02-21 20:36:41,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:41" (1/1) ... [2021-02-21 20:36:41,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:36:41,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:36:41,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:36:41,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:36:41,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:41" (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 [2021-02-21 20:36:41,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:36:41,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:36:41,749 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:36:41,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-21 20:36:41,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-21 20:36:41,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-02-21 20:36:41,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-02-21 20:36:41,749 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-02-21 20:36:41,749 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-02-21 20:36:41,750 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:36:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:36:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:36:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 20:36:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 20:36:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:36:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:36:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:36:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-21 20:36:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-21 20:36:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-21 20:36:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-21 20:36:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-21 20:36:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-21 20:36:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-21 20:36:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-21 20:36:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-21 20:36:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-21 20:36:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-21 20:36:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-21 20:36:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-21 20:36:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-21 20:36:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-21 20:36:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-21 20:36:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-21 20:36:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-21 20:36:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-02-21 20:36:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-02-21 20:36:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-02-21 20:36:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-21 20:36:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-21 20:36:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-21 20:36:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-21 20:36:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-21 20:36:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-21 20:36:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-21 20:36:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-21 20:36:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-21 20:36:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-21 20:36:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-21 20:36:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-21 20:36:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-21 20:36:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-21 20:36:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-21 20:36:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-21 20:36:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-21 20:36:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-21 20:36:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-21 20:36:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-21 20:36:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-21 20:36:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-21 20:36:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-21 20:36:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-21 20:36:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-21 20:36:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-21 20:36:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-21 20:36:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-21 20:36:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-21 20:36:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-21 20:36:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-21 20:36:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-21 20:36:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-21 20:36:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-21 20:36:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 20:36:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-21 20:36:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-21 20:36:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-21 20:36:41,759 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-21 20:36:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-21 20:36:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-21 20:36:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-21 20:36:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-21 20:36:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-21 20:36:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-21 20:36:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-21 20:36:41,760 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-21 20:36:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-21 20:36:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-21 20:36:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-21 20:36:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-21 20:36:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-21 20:36:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-21 20:36:41,761 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-21 20:36:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-21 20:36:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-21 20:36:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-21 20:36:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-21 20:36:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-21 20:36:41,762 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-21 20:36:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-21 20:36:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-21 20:36:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-21 20:36:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-21 20:36:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-21 20:36:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-21 20:36:41,763 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-21 20:36:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-21 20:36:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-21 20:36:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-21 20:36:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-21 20:36:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-21 20:36:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-21 20:36:41,764 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-21 20:36:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-21 20:36:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-21 20:36:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-21 20:36:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-21 20:36:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-21 20:36:41,765 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-21 20:36:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-21 20:36:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-21 20:36:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-21 20:36:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-21 20:36:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-21 20:36:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-02-21 20:36:41,766 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:36:41,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 20:36:41,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:36:41,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 20:36:41,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 20:36:41,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:36:41,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:36:41,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:36:41,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:36:41,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:36:42,301 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-02-21 20:36:42,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:36:42,550 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-02-21 20:36:42,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:36:42 BoogieIcfgContainer [2021-02-21 20:36:42,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:36:42,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:36:42,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:36:42,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:36:42,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:36:40" (1/3) ... [2021-02-21 20:36:42,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb1eb65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:36:42, skipping insertion in model container [2021-02-21 20:36:42,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:36:41" (2/3) ... [2021-02-21 20:36:42,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb1eb65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:36:42, skipping insertion in model container [2021-02-21 20:36:42,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:36:42" (3/3) ... [2021-02-21 20:36:42,576 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2021-02-21 20:36:42,592 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:36:42,599 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:36:42,627 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:36:42,668 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:36:42,668 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:36:42,668 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:36:42,669 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:36:42,669 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:36:42,669 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:36:42,669 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:36:42,669 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:36:42,690 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states. [2021-02-21 20:36:42,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-21 20:36:42,703 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:36:42,704 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] [2021-02-21 20:36:42,704 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:36:42,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:36:42,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1103699885, now seen corresponding path program 1 times [2021-02-21 20:36:42,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:36:42,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933061862] [2021-02-21 20:36:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:36:42,827 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:36:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:42,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:42,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:42,961 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:42,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:42,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:36:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:43,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:43,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:36:43,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933061862] [2021-02-21 20:36:43,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:36:43,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 20:36:43,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324918500] [2021-02-21 20:36:43,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 20:36:43,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:36:43,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 20:36:43,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 20:36:43,059 INFO L87 Difference]: Start difference. First operand 78 states. Second operand 3 states. [2021-02-21 20:36:43,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:36:43,263 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2021-02-21 20:36:43,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 20:36:43,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2021-02-21 20:36:43,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:36:43,275 INFO L225 Difference]: With dead ends: 117 [2021-02-21 20:36:43,276 INFO L226 Difference]: Without dead ends: 55 [2021-02-21 20:36:43,280 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 [2021-02-21 20:36:43,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-02-21 20:36:43,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-02-21 20:36:43,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-21 20:36:43,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2021-02-21 20:36:43,366 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 30 [2021-02-21 20:36:43,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:36:43,367 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2021-02-21 20:36:43,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 20:36:43,367 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2021-02-21 20:36:43,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-21 20:36:43,368 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:36:43,369 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] [2021-02-21 20:36:43,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:36:43,369 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:36:43,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:36:43,370 INFO L82 PathProgramCache]: Analyzing trace with hash 72424020, now seen corresponding path program 1 times [2021-02-21 20:36:43,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:36:43,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129693391] [2021-02-21 20:36:43,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:36:43,377 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:36:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:43,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:43,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:43,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:43,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:36:43,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:43,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:36:43,504 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:43,505 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:36:43,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:43,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:36:43,526 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:43,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:43,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:36:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:36:43,599 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:36:43,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:36:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:36:43,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129693391] [2021-02-21 20:36:43,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:36:43,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 20:36:43,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134616339] [2021-02-21 20:36:43,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 20:36:43,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:36:43,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 20:36:43,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:36:43,616 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 7 states. [2021-02-21 20:36:43,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:36:43,928 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2021-02-21 20:36:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 20:36:43,928 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2021-02-21 20:36:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:36:43,930 INFO L225 Difference]: With dead ends: 112 [2021-02-21 20:36:43,931 INFO L226 Difference]: Without dead ends: 87 [2021-02-21 20:36:43,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-21 20:36:43,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-02-21 20:36:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 57. [2021-02-21 20:36:43,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-02-21 20:36:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2021-02-21 20:36:43,945 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 32 [2021-02-21 20:36:43,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:36:43,945 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2021-02-21 20:36:43,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 20:36:43,946 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2021-02-21 20:36:43,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-21 20:36:43,947 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:36:43,947 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] [2021-02-21 20:36:43,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:36:43,948 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:36:43,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:36:43,949 INFO L82 PathProgramCache]: Analyzing trace with hash -930903042, now seen corresponding path program 1 times [2021-02-21 20:36:43,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:36:43,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017528981] [2021-02-21 20:36:43,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:36:44,020 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:36:44,024 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:36:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:36:44,058 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:36:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:36:44,096 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:36:44,150 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:36:44,150 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:36:44,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:36:44,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:36:44 BoogieIcfgContainer [2021-02-21 20:36:44,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:36:44,171 INFO L168 Benchmark]: Toolchain (without parser) took 3207.12 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 73.0 MB in the end (delta: 52.7 MB). Peak memory consumption was 53.8 MB. Max. memory is 8.0 GB. [2021-02-21 20:36:44,172 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:36:44,173 INFO L168 Benchmark]: CACSL2BoogieTranslator took 581.99 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 102.6 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:36:44,173 INFO L168 Benchmark]: Boogie Preprocessor took 77.17 ms. Allocated memory is still 151.0 MB. Free memory was 102.6 MB in the beginning and 100.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:36:44,174 INFO L168 Benchmark]: RCFGBuilder took 914.56 ms. Allocated memory is still 151.0 MB. Free memory was 100.0 MB in the beginning and 106.6 MB in the end (delta: -6.6 MB). Peak memory consumption was 25.4 MB. Max. memory is 8.0 GB. [2021-02-21 20:36:44,175 INFO L168 Benchmark]: TraceAbstraction took 1610.48 ms. Allocated memory is still 151.0 MB. Free memory was 106.1 MB in the beginning and 73.0 MB in the end (delta: 33.1 MB). Peak memory consumption was 34.7 MB. Max. memory is 8.0 GB. [2021-02-21 20:36:44,178 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 581.99 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 102.6 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 77.17 ms. Allocated memory is still 151.0 MB. Free memory was 102.6 MB in the beginning and 100.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 914.56 ms. Allocated memory is still 151.0 MB. Free memory was 100.0 MB in the beginning and 106.6 MB in the end (delta: -6.6 MB). Peak memory consumption was 25.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1610.48 ms. Allocated memory is still 151.0 MB. Free memory was 106.1 MB in the beginning and 73.0 MB in the end (delta: 33.1 MB). Peak memory consumption was 34.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 573]: a call to reach_error is reachable a call to reach_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] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 106 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 130 SDtfs, 43 SDslu, 178 SDs, 0 SdLazy, 198 SolverSat, 9 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=78occurred 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, 30 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...