/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-properties/list_flag-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 22:04:50,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 22:04:50,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 22:04:50,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 22:04:50,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 22:04:50,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 22:04:50,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 22:04:50,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 22:04:50,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 22:04:50,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 22:04:50,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 22:04:50,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 22:04:50,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 22:04:50,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 22:04:50,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 22:04:50,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 22:04:50,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 22:04:50,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 22:04:50,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 22:04:50,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 22:04:50,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 22:04:50,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 22:04:50,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 22:04:50,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 22:04:50,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 22:04:50,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 22:04:50,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 22:04:50,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 22:04:50,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 22:04:50,858 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 22:04:50,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 22:04:50,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 22:04:50,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 22:04:50,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 22:04:50,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 22:04:50,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 22:04:50,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 22:04:50,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 22:04:50,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 22:04:50,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 22:04:50,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 22:04:50,869 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 22:04:50,890 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 22:04:50,891 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 22:04:50,893 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 22:04:50,893 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 22:04:50,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 22:04:50,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 22:04:50,894 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 22:04:50,894 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 22:04:50,895 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 22:04:50,895 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 22:04:50,896 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 22:04:50,896 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 22:04:50,896 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 22:04:50,896 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 22:04:50,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 22:04:50,897 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 22:04:50,897 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 22:04:50,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 22:04:50,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 22:04:50,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 22:04:50,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 22:04:50,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 22:04:50,899 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-09-04 22:04:51,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 22:04:51,371 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 22:04:51,377 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 22:04:51,379 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 22:04:51,380 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 22:04:51,381 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_flag-1.i [2020-09-04 22:04:51,472 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8847ce99/58f6928c9ca74f1cb04b2d8e13f2dba0/FLAG17e30cf21 [2020-09-04 22:04:52,068 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 22:04:52,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list_flag-1.i [2020-09-04 22:04:52,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8847ce99/58f6928c9ca74f1cb04b2d8e13f2dba0/FLAG17e30cf21 [2020-09-04 22:04:52,319 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e8847ce99/58f6928c9ca74f1cb04b2d8e13f2dba0 [2020-09-04 22:04:52,335 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 22:04:52,337 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 22:04:52,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 22:04:52,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 22:04:52,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 22:04:52,345 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:04:52" (1/1) ... [2020-09-04 22:04:52,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@157ca41e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:52, skipping insertion in model container [2020-09-04 22:04:52,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:04:52" (1/1) ... [2020-09-04 22:04:52,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 22:04:52,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 22:04:52,977 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:04:52,990 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 22:04:53,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:04:53,099 INFO L208 MainTranslator]: Completed translation [2020-09-04 22:04:53,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:53 WrapperNode [2020-09-04 22:04:53,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 22:04:53,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 22:04:53,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 22:04:53,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 22:04:53,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:53" (1/1) ... [2020-09-04 22:04:53,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:53" (1/1) ... [2020-09-04 22:04:53,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:53" (1/1) ... [2020-09-04 22:04:53,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:53" (1/1) ... [2020-09-04 22:04:53,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:53" (1/1) ... [2020-09-04 22:04:53,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:53" (1/1) ... [2020-09-04 22:04:53,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:53" (1/1) ... [2020-09-04 22:04:53,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 22:04:53,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 22:04:53,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 22:04:53,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 22:04:53,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:53" (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 22:04:53,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 22:04:53,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 22:04:53,263 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-04 22:04:53,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-04 22:04:53,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-09-04 22:04:53,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-09-04 22:04:53,264 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-09-04 22:04:53,264 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-04 22:04:53,264 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 22:04:53,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 22:04:53,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 22:04:53,265 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-04 22:04:53,265 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-04 22:04:53,265 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-04 22:04:53,265 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-04 22:04:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-04 22:04:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-04 22:04:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-04 22:04:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-04 22:04:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-04 22:04:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-04 22:04:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-04 22:04:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-04 22:04:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-04 22:04:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-04 22:04:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-04 22:04:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-04 22:04:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-04 22:04:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-04 22:04:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-09-04 22:04:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-09-04 22:04:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-09-04 22:04:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-04 22:04:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-04 22:04:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-04 22:04:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-04 22:04:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-04 22:04:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-04 22:04:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-04 22:04:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-04 22:04:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-04 22:04:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-04 22:04:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-04 22:04:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-04 22:04:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-04 22:04:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-04 22:04:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-04 22:04:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-04 22:04:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-04 22:04:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-04 22:04:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-04 22:04:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-04 22:04:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-04 22:04:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-04 22:04:53,279 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-04 22:04:53,280 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-04 22:04:53,280 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-04 22:04:53,280 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-04 22:04:53,280 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-04 22:04:53,280 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-04 22:04:53,280 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-04 22:04:53,280 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-04 22:04:53,281 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-04 22:04:53,281 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-04 22:04:53,281 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-04 22:04:53,281 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-04 22:04:53,281 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 22:04:53,281 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 22:04:53,281 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-04 22:04:53,282 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 22:04:53,282 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-04 22:04:53,282 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-04 22:04:53,282 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-04 22:04:53,282 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-04 22:04:53,283 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 22:04:53,284 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-04 22:04:53,284 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-04 22:04:53,284 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-04 22:04:53,284 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-04 22:04:53,284 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-04 22:04:53,285 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-04 22:04:53,285 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-04 22:04:53,285 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-04 22:04:53,285 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-04 22:04:53,286 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-04 22:04:53,286 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-04 22:04:53,287 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-04 22:04:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-04 22:04:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-04 22:04:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-04 22:04:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-04 22:04:53,288 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-04 22:04:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-04 22:04:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-04 22:04:53,289 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-04 22:04:53,290 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-04 22:04:53,290 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-04 22:04:53,290 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-04 22:04:53,290 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-04 22:04:53,291 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-04 22:04:53,291 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-04 22:04:53,291 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-04 22:04:53,291 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-04 22:04:53,291 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-04 22:04:53,291 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-04 22:04:53,291 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-04 22:04:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-04 22:04:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-04 22:04:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-04 22:04:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-04 22:04:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-04 22:04:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-04 22:04:53,292 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-04 22:04:53,293 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-04 22:04:53,293 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-04 22:04:53,293 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-04 22:04:53,293 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-04 22:04:53,293 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-04 22:04:53,293 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-04 22:04:53,293 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 22:04:53,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 22:04:53,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 22:04:53,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 22:04:53,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 22:04:53,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 22:04:53,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 22:04:53,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 22:04:53,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 22:04:53,627 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-04 22:04:53,849 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 22:04:53,849 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 22:04:53,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:04:53 BoogieIcfgContainer [2020-09-04 22:04:53,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 22:04:53,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 22:04:53,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 22:04:53,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 22:04:53,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 10:04:52" (1/3) ... [2020-09-04 22:04:53,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17760783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:04:53, skipping insertion in model container [2020-09-04 22:04:53,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:04:53" (2/3) ... [2020-09-04 22:04:53,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17760783 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:04:53, skipping insertion in model container [2020-09-04 22:04:53,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:04:53" (3/3) ... [2020-09-04 22:04:53,864 INFO L109 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2020-09-04 22:04:53,875 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 22:04:53,886 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 22:04:53,909 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 22:04:53,944 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 22:04:53,944 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 22:04:53,945 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 22:04:53,945 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 22:04:53,945 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 22:04:53,945 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 22:04:53,945 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 22:04:53,945 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 22:04:53,966 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-09-04 22:04:53,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 22:04:53,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:53,985 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 22:04:53,985 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:53,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:53,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1409516089, now seen corresponding path program 1 times [2020-09-04 22:04:54,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:54,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318703549] [2020-09-04 22:04:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:54,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:54,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:54,262 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 22:04:54,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318703549] [2020-09-04 22:04:54,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:04:54,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 22:04:54,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956748608] [2020-09-04 22:04:54,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 22:04:54,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:54,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 22:04:54,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:04:54,305 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-09-04 22:04:54,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:54,577 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2020-09-04 22:04:54,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 22:04:54,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-09-04 22:04:54,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:54,597 INFO L225 Difference]: With dead ends: 89 [2020-09-04 22:04:54,598 INFO L226 Difference]: Without dead ends: 53 [2020-09-04 22:04:54,606 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 22:04:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-04 22:04:54,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-04 22:04:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-04 22:04:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-09-04 22:04:54,666 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 26 [2020-09-04 22:04:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:54,667 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-09-04 22:04:54,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 22:04:54,668 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-09-04 22:04:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 22:04:54,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:54,669 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] [2020-09-04 22:04:54,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 22:04:54,670 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:54,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:54,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1836407039, now seen corresponding path program 1 times [2020-09-04 22:04:54,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:54,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918777490] [2020-09-04 22:04:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:54,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:54,821 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 22:04:54,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918777490] [2020-09-04 22:04:54,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:04:54,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 22:04:54,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119863441] [2020-09-04 22:04:54,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:04:54,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:54,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:04:54,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:04:54,826 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 7 states. [2020-09-04 22:04:55,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:55,144 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2020-09-04 22:04:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 22:04:55,145 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-09-04 22:04:55,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:55,147 INFO L225 Difference]: With dead ends: 122 [2020-09-04 22:04:55,148 INFO L226 Difference]: Without dead ends: 115 [2020-09-04 22:04:55,149 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 22:04:55,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-04 22:04:55,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 63. [2020-09-04 22:04:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-04 22:04:55,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2020-09-04 22:04:55,165 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 30 [2020-09-04 22:04:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:55,166 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2020-09-04 22:04:55,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:04:55,166 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2020-09-04 22:04:55,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 22:04:55,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:55,168 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] [2020-09-04 22:04:55,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 22:04:55,169 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:55,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:55,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1477911671, now seen corresponding path program 1 times [2020-09-04 22:04:55,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:55,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721302897] [2020-09-04 22:04:55,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:55,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:55,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721302897] [2020-09-04 22:04:55,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:04:55,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 22:04:55,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23790976] [2020-09-04 22:04:55,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:04:55,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:55,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:04:55,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:04:55,292 INFO L87 Difference]: Start difference. First operand 63 states and 69 transitions. Second operand 7 states. [2020-09-04 22:04:55,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:55,559 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2020-09-04 22:04:55,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 22:04:55,559 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-04 22:04:55,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:55,561 INFO L225 Difference]: With dead ends: 117 [2020-09-04 22:04:55,562 INFO L226 Difference]: Without dead ends: 103 [2020-09-04 22:04:55,562 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 22:04:55,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-04 22:04:55,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2020-09-04 22:04:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-04 22:04:55,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2020-09-04 22:04:55,574 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 36 [2020-09-04 22:04:55,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:55,574 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2020-09-04 22:04:55,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:04:55,574 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2020-09-04 22:04:55,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 22:04:55,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:55,576 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] [2020-09-04 22:04:55,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 22:04:55,577 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:55,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:55,577 INFO L82 PathProgramCache]: Analyzing trace with hash -380981001, now seen corresponding path program 1 times [2020-09-04 22:04:55,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:55,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5756425] [2020-09-04 22:04:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:55,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:04:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:04:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:04:55,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5756425] [2020-09-04 22:04:55,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:04:55,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 22:04:55,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723106605] [2020-09-04 22:04:55,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 22:04:55,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:04:55,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 22:04:55,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 22:04:55,704 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand 7 states. [2020-09-04 22:04:56,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:04:56,007 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2020-09-04 22:04:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 22:04:56,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-04 22:04:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:04:56,011 INFO L225 Difference]: With dead ends: 100 [2020-09-04 22:04:56,012 INFO L226 Difference]: Without dead ends: 82 [2020-09-04 22:04:56,012 INFO L675 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 [2020-09-04 22:04:56,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-04 22:04:56,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-09-04 22:04:56,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-04 22:04:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-09-04 22:04:56,027 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 36 [2020-09-04 22:04:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:04:56,027 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-09-04 22:04:56,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 22:04:56,027 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-09-04 22:04:56,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-04 22:04:56,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:04:56,030 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] [2020-09-04 22:04:56,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 22:04:56,031 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:04:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:04:56,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1659276919, now seen corresponding path program 1 times [2020-09-04 22:04:56,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:04:56,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102480486] [2020-09-04 22:04:56,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:04:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:04:56,109 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:04:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:04:56,134 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:04:56,185 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 22:04:56,186 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 22:04:56,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 22:04:56,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 10:04:56 BoogieIcfgContainer [2020-09-04 22:04:56,241 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 22:04:56,245 INFO L168 Benchmark]: Toolchain (without parser) took 3907.02 ms. Allocated memory was 138.9 MB in the beginning and 248.0 MB in the end (delta: 109.1 MB). Free memory was 101.1 MB in the beginning and 201.0 MB in the end (delta: -99.9 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-04 22:04:56,246 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 22:04:56,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 762.53 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 100.9 MB in the beginning and 170.0 MB in the end (delta: -69.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2020-09-04 22:04:56,248 INFO L168 Benchmark]: Boogie Preprocessor took 79.74 ms. Allocated memory is still 203.4 MB. Free memory was 170.0 MB in the beginning and 167.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-09-04 22:04:56,249 INFO L168 Benchmark]: RCFGBuilder took 672.57 ms. Allocated memory is still 203.4 MB. Free memory was 167.3 MB in the beginning and 120.4 MB in the end (delta: 46.8 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB. [2020-09-04 22:04:56,250 INFO L168 Benchmark]: TraceAbstraction took 2385.76 ms. Allocated memory was 203.4 MB in the beginning and 248.0 MB in the end (delta: 44.6 MB). Free memory was 119.8 MB in the beginning and 201.0 MB in the end (delta: -81.2 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 22:04:56,254 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 762.53 ms. Allocated memory was 138.9 MB in the beginning and 203.4 MB in the end (delta: 64.5 MB). Free memory was 100.9 MB in the beginning and 170.0 MB in the end (delta: -69.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 79.74 ms. Allocated memory is still 203.4 MB. Free memory was 170.0 MB in the beginning and 167.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 672.57 ms. Allocated memory is still 203.4 MB. Free memory was 167.3 MB in the beginning and 120.4 MB in the end (delta: 46.8 MB). Peak memory consumption was 46.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2385.76 ms. Allocated memory was 203.4 MB in the beginning and 248.0 MB in the end (delta: 44.6 MB). Free memory was 119.8 MB in the beginning and 201.0 MB in the end (delta: -81.2 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = __VERIFIER_nondet_int(); VAL [__VERIFIER_nondet_int()=1, flag=1] [L522] List p, a, t; VAL [flag=1] [L523] a = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L524] COND FALSE !(a == 0) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L525] p = a VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L526] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L527] COND TRUE \read(flag) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L528] p->h = 1 VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L532] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L533] COND FALSE !(t == 0) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L534] p->n = t VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L535] EXPR p->n VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->n={-2:0}, t={-2:0}] [L535] p = p->n VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, p->n={-2:0}, t={-2:0}] [L526] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, t={-2:0}] [L537] p->h = 3 VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, t={-2:0}] [L538] p = a VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L539] COND TRUE \read(flag) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L540] EXPR p->h VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=1, t={-2:0}] [L540] COND FALSE !(p->h == 2) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=1, t={-2:0}] [L545] EXPR p->h VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=1, t={-2:0}] [L545] COND TRUE p->h != 3 VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=1, t={-2:0}] [L546] __VERIFIER_error() VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 85 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 210 SDtfs, 217 SDslu, 451 SDs, 0 SdLazy, 504 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=2, 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, 4 MinimizatonAttempts, 121 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 170 NumberOfCodeBlocks, 170 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 9910 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, 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...