/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-properties/alternating_list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:38:26,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:38:26,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:38:26,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:38:26,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:38:26,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:38:26,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:38:26,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:38:26,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:38:26,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:38:26,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:38:26,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:38:26,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:38:26,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:38:26,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:38:26,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:38:26,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:38:26,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:38:26,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:38:26,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:38:26,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:38:26,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:38:27,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:38:27,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:38:27,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 16:38:27,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 16:38:27,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 16:38:27,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 16:38:27,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 16:38:27,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 16:38:27,016 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 16:38:27,017 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 16:38:27,018 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 16:38:27,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 16:38:27,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 16:38:27,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 16:38:27,022 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 16:38:27,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 16:38:27,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:38:27,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:38:27,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:38:27,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:38:27,051 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:38:27,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:38:27,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:38:27,055 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:38:27,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:38:27,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:38:27,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:38:27,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:38:27,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:38:27,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:38:27,058 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:38:27,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:38:27,059 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:38:27,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:38:27,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:38:27,060 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:38:27,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:38:27,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:38:27,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:38:27,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:38:27,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:38:27,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:38:27,061 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:38:27,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:38:27,531 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:38:27,536 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:38:27,539 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:38:27,539 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:38:27,541 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-09-04 16:38:27,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5563374b2/aecaf57f66b14e11b3077583a4cb5944/FLAGa8f137fa5 [2020-09-04 16:38:28,388 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:38:28,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-09-04 16:38:28,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5563374b2/aecaf57f66b14e11b3077583a4cb5944/FLAGa8f137fa5 [2020-09-04 16:38:28,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5563374b2/aecaf57f66b14e11b3077583a4cb5944 [2020-09-04 16:38:28,671 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:38:28,674 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:38:28,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:38:28,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:38:28,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:38:28,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:38:28" (1/1) ... [2020-09-04 16:38:28,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aca55f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:28, skipping insertion in model container [2020-09-04 16:38:28,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:38:28" (1/1) ... [2020-09-04 16:38:28,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:38:28,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:38:29,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:38:29,365 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:38:29,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:38:29,489 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:38:29,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:29 WrapperNode [2020-09-04 16:38:29,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:38:29,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:38:29,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:38:29,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:38:29,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:29" (1/1) ... [2020-09-04 16:38:29,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:29" (1/1) ... [2020-09-04 16:38:29,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:29" (1/1) ... [2020-09-04 16:38:29,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:29" (1/1) ... [2020-09-04 16:38:29,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:29" (1/1) ... [2020-09-04 16:38:29,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:29" (1/1) ... [2020-09-04 16:38:29,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:29" (1/1) ... [2020-09-04 16:38:29,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:38:29,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:38:29,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:38:29,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:38:29,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 16:38:29,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:38:29,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:38:29,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-04 16:38:29,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-04 16:38:29,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-04 16:38:29,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-04 16:38:29,659 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-04 16:38:29,659 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-04 16:38:29,660 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:38:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:38:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:38:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-04 16:38:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-04 16:38:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-04 16:38:29,661 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-04 16:38:29,661 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-04 16:38:29,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-04 16:38:29,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-04 16:38:29,661 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-04 16:38:29,662 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-04 16:38:29,662 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-04 16:38:29,662 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-04 16:38:29,662 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-04 16:38:29,662 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-04 16:38:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-04 16:38:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-04 16:38:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-04 16:38:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-04 16:38:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-04 16:38:29,664 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-04 16:38:29,664 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-04 16:38:29,664 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-04 16:38:29,664 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-04 16:38:29,664 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-04 16:38:29,664 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-04 16:38:29,665 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-04 16:38:29,665 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-04 16:38:29,665 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-04 16:38:29,665 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-04 16:38:29,665 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-04 16:38:29,665 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-04 16:38:29,665 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-04 16:38:29,666 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-04 16:38:29,666 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-04 16:38:29,666 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-04 16:38:29,666 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-04 16:38:29,666 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-04 16:38:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-04 16:38:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-04 16:38:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-04 16:38:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-04 16:38:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-04 16:38:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-04 16:38:29,668 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-04 16:38:29,668 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-04 16:38:29,668 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-04 16:38:29,668 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-04 16:38:29,668 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-04 16:38:29,668 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-04 16:38:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-04 16:38:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-04 16:38:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-04 16:38:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-04 16:38:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-04 16:38:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-04 16:38:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-04 16:38:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 16:38:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 16:38:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-04 16:38:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 16:38:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-04 16:38:29,671 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-04 16:38:29,671 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-04 16:38:29,671 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-04 16:38:29,671 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 16:38:29,671 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-04 16:38:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-04 16:38:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-04 16:38:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-04 16:38:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-04 16:38:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-04 16:38:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-04 16:38:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-04 16:38:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-04 16:38:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-04 16:38:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-04 16:38:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-04 16:38:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-04 16:38:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-04 16:38:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-04 16:38:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-04 16:38:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-04 16:38:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-04 16:38:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-04 16:38:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-04 16:38:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-04 16:38:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-04 16:38:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-04 16:38:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-04 16:38:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-04 16:38:29,675 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-04 16:38:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-04 16:38:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-04 16:38:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-04 16:38:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-04 16:38:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-04 16:38:29,676 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-04 16:38:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-04 16:38:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-04 16:38:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-04 16:38:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-04 16:38:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-04 16:38:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-04 16:38:29,677 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-04 16:38:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-04 16:38:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-04 16:38:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-04 16:38:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-04 16:38:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-04 16:38:29,678 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:38:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 16:38:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 16:38:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 16:38:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 16:38:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 16:38:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:38:29,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:38:29,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:38:30,118 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-04 16:38:30,387 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:38:30,387 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 16:38:30,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:38:30 BoogieIcfgContainer [2020-09-04 16:38:30,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:38:30,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:38:30,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:38:30,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:38:30,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:38:28" (1/3) ... [2020-09-04 16:38:30,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56dc4815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:38:30, skipping insertion in model container [2020-09-04 16:38:30,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:38:29" (2/3) ... [2020-09-04 16:38:30,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56dc4815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:38:30, skipping insertion in model container [2020-09-04 16:38:30,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:38:30" (3/3) ... [2020-09-04 16:38:30,407 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-09-04 16:38:30,421 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:38:30,435 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:38:30,461 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:38:30,498 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:38:30,503 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:38:30,504 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:38:30,504 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:38:30,505 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:38:30,513 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:38:30,513 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:38:30,514 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:38:30,537 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states. [2020-09-04 16:38:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 16:38:30,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:30,554 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] [2020-09-04 16:38:30,555 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:30,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1267394549, now seen corresponding path program 1 times [2020-09-04 16:38:30,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:30,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469295370] [2020-09-04 16:38:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:30,695 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:30,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:38:30,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469295370] [2020-09-04 16:38:30,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:30,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:38:30,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262693633] [2020-09-04 16:38:30,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:38:30,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:30,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:38:30,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:38:30,923 INFO L87 Difference]: Start difference. First operand 73 states. Second operand 3 states. [2020-09-04 16:38:31,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:31,209 INFO L93 Difference]: Finished difference Result 112 states and 129 transitions. [2020-09-04 16:38:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:38:31,211 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-04 16:38:31,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:31,225 INFO L225 Difference]: With dead ends: 112 [2020-09-04 16:38:31,225 INFO L226 Difference]: Without dead ends: 51 [2020-09-04 16:38:31,230 INFO L675 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 [2020-09-04 16:38:31,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-04 16:38:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-09-04 16:38:31,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 16:38:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-09-04 16:38:31,284 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 26 [2020-09-04 16:38:31,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:31,285 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-09-04 16:38:31,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:38:31,285 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-09-04 16:38:31,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 16:38:31,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:31,287 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] [2020-09-04 16:38:31,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:38:31,288 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:31,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:31,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1487998036, now seen corresponding path program 1 times [2020-09-04 16:38:31,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:31,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987395804] [2020-09-04 16:38:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:31,294 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:31,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:38:31,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987395804] [2020-09-04 16:38:31,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:31,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:38:31,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605555226] [2020-09-04 16:38:31,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:38:31,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:31,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:38:31,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:38:31,424 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 4 states. [2020-09-04 16:38:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:31,600 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-09-04 16:38:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 16:38:31,601 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-09-04 16:38:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:31,603 INFO L225 Difference]: With dead ends: 116 [2020-09-04 16:38:31,603 INFO L226 Difference]: Without dead ends: 78 [2020-09-04 16:38:31,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:38:31,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-04 16:38:31,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2020-09-04 16:38:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-04 16:38:31,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2020-09-04 16:38:31,633 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 28 [2020-09-04 16:38:31,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:31,634 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2020-09-04 16:38:31,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:38:31,634 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2020-09-04 16:38:31,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 16:38:31,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:31,636 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] [2020-09-04 16:38:31,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:38:31,638 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:31,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:31,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1813416041, now seen corresponding path program 1 times [2020-09-04 16:38:31,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:31,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722472202] [2020-09-04 16:38:31,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:31,650 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:31,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:31,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:38:31,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722472202] [2020-09-04 16:38:31,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:31,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 16:38:31,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490053201] [2020-09-04 16:38:31,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 16:38:31,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:31,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 16:38:31,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 16:38:31,802 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 7 states. [2020-09-04 16:38:32,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:32,045 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2020-09-04 16:38:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 16:38:32,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-09-04 16:38:32,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:32,047 INFO L225 Difference]: With dead ends: 126 [2020-09-04 16:38:32,047 INFO L226 Difference]: Without dead ends: 94 [2020-09-04 16:38:32,048 INFO L675 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 [2020-09-04 16:38:32,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-04 16:38:32,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2020-09-04 16:38:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-04 16:38:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2020-09-04 16:38:32,063 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 28 [2020-09-04 16:38:32,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:32,063 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2020-09-04 16:38:32,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 16:38:32,064 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2020-09-04 16:38:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 16:38:32,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:32,065 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] [2020-09-04 16:38:32,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:38:32,066 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:32,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:32,066 INFO L82 PathProgramCache]: Analyzing trace with hash -223654578, now seen corresponding path program 1 times [2020-09-04 16:38:32,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:32,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245422492] [2020-09-04 16:38:32,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:32,116 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:38:32,179 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:38:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:38:32,260 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:38:32,309 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:38:32,310 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:38:32,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:38:32,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:38:32 BoogieIcfgContainer [2020-09-04 16:38:32,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:38:32,342 INFO L168 Benchmark]: Toolchain (without parser) took 3667.10 ms. Allocated memory was 139.5 MB in the beginning and 237.5 MB in the end (delta: 98.0 MB). Free memory was 102.7 MB in the beginning and 122.5 MB in the end (delta: -19.8 MB). Peak memory consumption was 78.2 MB. Max. memory is 7.1 GB. [2020-09-04 16:38:32,343 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:38:32,344 INFO L168 Benchmark]: CACSL2BoogieTranslator took 815.40 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 102.5 MB in the beginning and 170.5 MB in the end (delta: -67.9 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2020-09-04 16:38:32,345 INFO L168 Benchmark]: Boogie Preprocessor took 80.56 ms. Allocated memory is still 203.9 MB. Free memory was 170.5 MB in the beginning and 167.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-09-04 16:38:32,346 INFO L168 Benchmark]: RCFGBuilder took 822.66 ms. Allocated memory is still 203.9 MB. Free memory was 167.8 MB in the beginning and 120.0 MB in the end (delta: 47.8 MB). Peak memory consumption was 47.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:38:32,347 INFO L168 Benchmark]: TraceAbstraction took 1941.90 ms. Allocated memory was 203.9 MB in the beginning and 237.5 MB in the end (delta: 33.6 MB). Free memory was 119.3 MB in the beginning and 122.5 MB in the end (delta: -3.2 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:38:32,351 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 139.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 815.40 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 102.5 MB in the beginning and 170.5 MB in the end (delta: -67.9 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 80.56 ms. Allocated memory is still 203.9 MB. Free memory was 170.5 MB in the beginning and 167.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 822.66 ms. Allocated memory is still 203.9 MB. Free memory was 167.8 MB in the beginning and 120.0 MB in the end (delta: 47.8 MB). Peak memory consumption was 47.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1941.90 ms. Allocated memory was 203.9 MB in the beginning and 237.5 MB in the end (delta: 33.6 MB). Free memory was 119.3 MB in the beginning and 122.5 MB in the end (delta: -3.2 MB). Peak memory consumption was 30.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 562]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = 1; [L522] List a = (List) malloc(sizeof(struct node)); [L523] COND FALSE !(a == 0) [L524] List t; [L525] List p = a; [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 2 [L529] flag = 0 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] flag = 1 [L542] EXPR p->h [L542] COND TRUE p->h != 3 [L543] COND TRUE \read(flag) [L544] flag = 0 [L545] EXPR p->h [L545] COND TRUE p->h != 1 [L562] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 187 SDtfs, 64 SDslu, 206 SDs, 0 SdLazy, 251 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred 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, 3 MinimizatonAttempts, 32 StatesRemovedByMinimization, 2 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...