/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/simple-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:16:33,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:16:33,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:16:33,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:16:33,260 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:16:33,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:16:33,264 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:16:33,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:16:33,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:16:33,279 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:16:33,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:16:33,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:16:33,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:16:33,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:16:33,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:16:33,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:16:33,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:16:33,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:16:33,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:16:33,294 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:16:33,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:16:33,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:16:33,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:16:33,298 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:16:33,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 11:16:33,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 11:16:33,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 11:16:33,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 11:16:33,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 11:16:33,302 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 11:16:33,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:16:33,303 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:16:33,304 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:16:33,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:16:33,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:16:33,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:16:33,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:16:33,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:16:33,307 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:16:33,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:16:33,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:16:33,309 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:16:33,322 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:16:33,322 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:16:33,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:16:33,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:16:33,324 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:16:33,324 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:16:33,324 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:16:33,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:16:33,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:16:33,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:16:33,325 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:16:33,325 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:16:33,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:16:33,326 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:16:33,326 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:16:33,326 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:16:33,326 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:16:33,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:16:33,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:16:33,327 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:16:33,327 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:16:33,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:16:33,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:16:33,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:16:33,328 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:16:33,328 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:16:33,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:16:33,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:16:33,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:16:33,329 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:16:33,587 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:16:33,597 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:16:33,601 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:16:33,602 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:16:33,602 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:16:33,603 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple-1.i [2020-07-07 11:16:33,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b7fa88d7/6de1dc2ea9f444f3b64456275f3d91f0/FLAG17b7d5d8e [2020-07-07 11:16:34,172 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:16:34,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/simple-1.i [2020-07-07 11:16:34,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b7fa88d7/6de1dc2ea9f444f3b64456275f3d91f0/FLAG17b7d5d8e [2020-07-07 11:16:34,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b7fa88d7/6de1dc2ea9f444f3b64456275f3d91f0 [2020-07-07 11:16:34,564 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:16:34,566 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:16:34,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:16:34,567 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:16:34,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:16:34,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:16:34" (1/1) ... [2020-07-07 11:16:34,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@652352a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:34, skipping insertion in model container [2020-07-07 11:16:34,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:16:34" (1/1) ... [2020-07-07 11:16:34,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:16:34,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:16:35,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:16:35,095 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:16:35,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:16:35,208 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:16:35,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:35 WrapperNode [2020-07-07 11:16:35,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:16:35,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:16:35,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:16:35,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:16:35,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:35" (1/1) ... [2020-07-07 11:16:35,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:35" (1/1) ... [2020-07-07 11:16:35,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:35" (1/1) ... [2020-07-07 11:16:35,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:35" (1/1) ... [2020-07-07 11:16:35,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:35" (1/1) ... [2020-07-07 11:16:35,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:35" (1/1) ... [2020-07-07 11:16:35,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:35" (1/1) ... [2020-07-07 11:16:35,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:16:35,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:16:35,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:16:35,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:16:35,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:16:35,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:16:35,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:16:35,353 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-07 11:16:35,353 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-07 11:16:35,353 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-07 11:16:35,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-07 11:16:35,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-07 11:16:35,354 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-07 11:16:35,354 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:16:35,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:16:35,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:16:35,355 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-07 11:16:35,355 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-07 11:16:35,355 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-07 11:16:35,355 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-07 11:16:35,355 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-07 11:16:35,355 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-07 11:16:35,356 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-07 11:16:35,356 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-07 11:16:35,356 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-07 11:16:35,356 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-07 11:16:35,356 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-07 11:16:35,356 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-07 11:16:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-07 11:16:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-07 11:16:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-07 11:16:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-07 11:16:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-07 11:16:35,357 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-07 11:16:35,358 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-07 11:16:35,358 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-07 11:16:35,358 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-07 11:16:35,358 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-07 11:16:35,358 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-07 11:16:35,358 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-07 11:16:35,358 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-07 11:16:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-07 11:16:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-07 11:16:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-07 11:16:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-07 11:16:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-07 11:16:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-07 11:16:35,359 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-07 11:16:35,360 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-07 11:16:35,360 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-07 11:16:35,360 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-07 11:16:35,360 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-07 11:16:35,360 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-07 11:16:35,360 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-07 11:16:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-07 11:16:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-07 11:16:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-07 11:16:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-07 11:16:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-07 11:16:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-07 11:16:35,361 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-07 11:16:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-07 11:16:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-07 11:16:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-07 11:16:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-07 11:16:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-07 11:16:35,362 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-07 11:16:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-07 11:16:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-07 11:16:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-07 11:16:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-07 11:16:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 11:16:35,363 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-07 11:16:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-07 11:16:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-07 11:16:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-07 11:16:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-07 11:16:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-07 11:16:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-07 11:16:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 11:16:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-07 11:16:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-07 11:16:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-07 11:16:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-07 11:16:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-07 11:16:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-07 11:16:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-07 11:16:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-07 11:16:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-07 11:16:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-07 11:16:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-07 11:16:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-07 11:16:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-07 11:16:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-07 11:16:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-07 11:16:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-07 11:16:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-07 11:16:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-07 11:16:35,367 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-07 11:16:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-07 11:16:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-07 11:16:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-07 11:16:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-07 11:16:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-07 11:16:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-07 11:16:35,368 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-07 11:16:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-07 11:16:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-07 11:16:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-07 11:16:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-07 11:16:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-07 11:16:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-07 11:16:35,369 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-07 11:16:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-07 11:16:35,370 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-07 11:16:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-07 11:16:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-07 11:16:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-07 11:16:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-07 11:16:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-07 11:16:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-07 11:16:35,371 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-07 11:16:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-07 11:16:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-07 11:16:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:16:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 11:16:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 11:16:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 11:16:35,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 11:16:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 11:16:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:16:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:16:35,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 11:16:35,737 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-07 11:16:35,927 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:16:35,927 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 11:16:35,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:16:35 BoogieIcfgContainer [2020-07-07 11:16:35,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:16:35,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:16:35,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:16:35,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:16:35,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:16:34" (1/3) ... [2020-07-07 11:16:35,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252c2053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:16:35, skipping insertion in model container [2020-07-07 11:16:35,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:16:35" (2/3) ... [2020-07-07 11:16:35,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252c2053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:16:35, skipping insertion in model container [2020-07-07 11:16:35,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:16:35" (3/3) ... [2020-07-07 11:16:35,949 INFO L109 eAbstractionObserver]: Analyzing ICFG simple-1.i [2020-07-07 11:16:35,961 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:16:35,979 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:16:35,994 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:16:36,013 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:16:36,014 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:16:36,014 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:16:36,014 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:16:36,014 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:16:36,014 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:16:36,014 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:16:36,014 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:16:36,032 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-07 11:16:36,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:16:36,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:36,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:16:36,040 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:36,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1710443637, now seen corresponding path program 1 times [2020-07-07 11:16:36,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:36,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043279903] [2020-07-07 11:16:36,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:36,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043279903] [2020-07-07 11:16:36,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:16:36,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 11:16:36,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598015693] [2020-07-07 11:16:36,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 11:16:36,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:36,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 11:16:36,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 11:16:36,262 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-07-07 11:16:36,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:36,347 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2020-07-07 11:16:36,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 11:16:36,349 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-07-07 11:16:36,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:36,357 INFO L225 Difference]: With dead ends: 38 [2020-07-07 11:16:36,357 INFO L226 Difference]: Without dead ends: 18 [2020-07-07 11:16:36,360 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 [2020-07-07 11:16:36,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-07 11:16:36,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-07 11:16:36,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-07 11:16:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-07 11:16:36,392 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-07 11:16:36,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:36,392 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-07 11:16:36,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 11:16:36,392 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-07 11:16:36,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-07 11:16:36,393 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:36,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:16:36,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:16:36,394 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:36,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:36,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1041507629, now seen corresponding path program 1 times [2020-07-07 11:16:36,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:36,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640507894] [2020-07-07 11:16:36,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:36,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640507894] [2020-07-07 11:16:36,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:16:36,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 11:16:36,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419224735] [2020-07-07 11:16:36,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 11:16:36,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:36,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 11:16:36,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:16:36,560 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-07-07 11:16:36,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:36,707 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-07-07 11:16:36,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:16:36,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-07 11:16:36,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:36,709 INFO L225 Difference]: With dead ends: 33 [2020-07-07 11:16:36,709 INFO L226 Difference]: Without dead ends: 31 [2020-07-07 11:16:36,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:16:36,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-07 11:16:36,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-07-07 11:16:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 11:16:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-07 11:16:36,720 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2020-07-07 11:16:36,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:36,721 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-07 11:16:36,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 11:16:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-07 11:16:36,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-07 11:16:36,722 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:36,722 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:16:36,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:16:36,723 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:36,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:36,723 INFO L82 PathProgramCache]: Analyzing trace with hash 714847529, now seen corresponding path program 1 times [2020-07-07 11:16:36,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:36,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168243324] [2020-07-07 11:16:36,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:36,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168243324] [2020-07-07 11:16:36,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296922937] [2020-07-07 11:16:36,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:16:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:16:37,004 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-07 11:16:37,011 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:16:37,119 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-07 11:16:37,120 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:37,134 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:37,144 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-07 11:16:37,144 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:37,153 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:37,154 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:37,154 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-07-07 11:16:37,210 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-07 11:16:37,212 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:37,218 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:37,224 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-07 11:16:37,226 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-07 11:16:37,232 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-07 11:16:37,232 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-07 11:16:37,233 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-07-07 11:16:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:16:37,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:16:37,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2020-07-07 11:16:37,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961769362] [2020-07-07 11:16:37,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:16:37,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:16:37,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:16:37,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:16:37,238 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2020-07-07 11:16:37,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:16:37,363 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-07-07 11:16:37,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:16:37,364 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-07-07 11:16:37,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:16:37,365 INFO L225 Difference]: With dead ends: 37 [2020-07-07 11:16:37,365 INFO L226 Difference]: Without dead ends: 27 [2020-07-07 11:16:37,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:16:37,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-07 11:16:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-07-07 11:16:37,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-07 11:16:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-07 11:16:37,375 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-07-07 11:16:37,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:16:37,377 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-07 11:16:37,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:16:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-07 11:16:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-07 11:16:37,378 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:16:37,378 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:16:37,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:16:37,590 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:16:37,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:16:37,590 INFO L82 PathProgramCache]: Analyzing trace with hash -158216428, now seen corresponding path program 1 times [2020-07-07 11:16:37,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:16:37,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129049932] [2020-07-07 11:16:37,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:16:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:16:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:16:37,663 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:16:37,664 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:16:37,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 11:16:37,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:16:37 BoogieIcfgContainer [2020-07-07 11:16:37,692 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:16:37,694 INFO L168 Benchmark]: Toolchain (without parser) took 3127.83 ms. Allocated memory was 144.2 MB in the beginning and 232.3 MB in the end (delta: 88.1 MB). Free memory was 99.3 MB in the beginning and 111.1 MB in the end (delta: -11.8 MB). Peak memory consumption was 76.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:16:37,694 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 144.2 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:16:37,695 INFO L168 Benchmark]: CACSL2BoogieTranslator took 642.07 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 99.1 MB in the beginning and 167.4 MB in the end (delta: -68.3 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:16:37,696 INFO L168 Benchmark]: Boogie Preprocessor took 69.67 ms. Allocated memory is still 200.8 MB. Free memory was 167.4 MB in the beginning and 164.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:16:37,697 INFO L168 Benchmark]: RCFGBuilder took 654.91 ms. Allocated memory is still 200.8 MB. Free memory was 164.7 MB in the beginning and 121.8 MB in the end (delta: 42.9 MB). Peak memory consumption was 42.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:16:37,698 INFO L168 Benchmark]: TraceAbstraction took 1755.15 ms. Allocated memory was 200.8 MB in the beginning and 232.3 MB in the end (delta: 31.5 MB). Free memory was 121.8 MB in the beginning and 111.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 42.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:16:37,702 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 144.2 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 642.07 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 99.1 MB in the beginning and 167.4 MB in the end (delta: -68.3 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 69.67 ms. Allocated memory is still 200.8 MB. Free memory was 167.4 MB in the beginning and 164.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 654.91 ms. Allocated memory is still 200.8 MB. Free memory was 164.7 MB in the beginning and 121.8 MB in the end (delta: 42.9 MB). Peak memory consumption was 42.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1755.15 ms. Allocated memory was 200.8 MB in the beginning and 232.3 MB in the end (delta: 31.5 MB). Free memory was 121.8 MB in the beginning and 111.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 42.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 538]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L522] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L523] List t; [L524] List p = a; [L525] a->h = 2 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] p->h = 1 [L528] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L529] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L530] p->n = t [L531] EXPR p->n [L531] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L533] p->h = 2 [L534] p->n = 0 [L535] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L536] COND TRUE p!=0 [L537] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-2:0}] [L537] COND TRUE p->h != 2 [L538] __VERIFIER_error() VAL [a={-1:0}, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 51 SDtfs, 41 SDslu, 73 SDs, 0 SdLazy, 122 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 4732 SizeOfPredicates, 7 NumberOfNonLiveVariables, 79 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 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...