/usr/bin/java -ea -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/alternating_list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-8fc6572 [2020-07-10 15:04:44,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-10 15:04:44,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-10 15:04:44,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-10 15:04:44,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-10 15:04:44,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-10 15:04:44,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-10 15:04:44,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-10 15:04:44,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-10 15:04:44,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-10 15:04:44,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-10 15:04:44,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-10 15:04:44,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-10 15:04:44,163 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-10 15:04:44,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-10 15:04:44,167 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-10 15:04:44,168 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-10 15:04:44,169 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-10 15:04:44,171 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-10 15:04:44,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-10 15:04:44,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-10 15:04:44,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-10 15:04:44,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-10 15:04:44,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-10 15:04:44,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-10 15:04:44,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-10 15:04:44,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-10 15:04:44,194 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-10 15:04:44,195 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-10 15:04:44,195 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-10 15:04:44,196 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-10 15:04:44,197 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-10 15:04:44,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-10 15:04:44,198 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-10 15:04:44,200 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-10 15:04:44,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-10 15:04:44,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-10 15:04:44,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-10 15:04:44,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-10 15:04:44,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-10 15:04:44,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-10 15:04:44,206 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 [2020-07-10 15:04:44,244 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-10 15:04:44,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-10 15:04:44,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-10 15:04:44,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-10 15:04:44,249 INFO L138 SettingsManager]: * Use SBE=true [2020-07-10 15:04:44,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-10 15:04:44,249 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-10 15:04:44,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-10 15:04:44,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-10 15:04:44,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-10 15:04:44,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-10 15:04:44,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-10 15:04:44,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-10 15:04:44,250 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-10 15:04:44,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-10 15:04:44,250 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-10 15:04:44,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-10 15:04:44,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-10 15:04:44,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-10 15:04:44,251 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-10 15:04:44,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-10 15:04:44,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-10 15:04:44,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-10 15:04:44,252 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-10 15:04:44,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-10 15:04:44,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-10 15:04:44,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-10 15:04:44,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-10 15:04:44,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-10 15:04:44,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-10 15:04:44,578 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-10 15:04:44,594 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-10 15:04:44,599 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-10 15:04:44,601 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-10 15:04:44,602 INFO L275 PluginConnector]: CDTParser initialized [2020-07-10 15:04:44,603 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-07-10 15:04:44,685 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aa397fce/8153318273454e6499d318c5c1cbb218/FLAG5aa19bca7 [2020-07-10 15:04:45,288 INFO L306 CDTParser]: Found 1 translation units. [2020-07-10 15:04:45,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/alternating_list-2.i [2020-07-10 15:04:45,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aa397fce/8153318273454e6499d318c5c1cbb218/FLAG5aa19bca7 [2020-07-10 15:04:45,556 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aa397fce/8153318273454e6499d318c5c1cbb218 [2020-07-10 15:04:45,565 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-10 15:04:45,567 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-10 15:04:45,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-10 15:04:45,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-10 15:04:45,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-10 15:04:45,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 03:04:45" (1/1) ... [2020-07-10 15:04:45,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@485a0299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:04:45, skipping insertion in model container [2020-07-10 15:04:45,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.07 03:04:45" (1/1) ... [2020-07-10 15:04:45,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-10 15:04:45,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-10 15:04:46,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 15:04:46,112 INFO L203 MainTranslator]: Completed pre-run [2020-07-10 15:04:46,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-10 15:04:46,281 INFO L208 MainTranslator]: Completed translation [2020-07-10 15:04:46,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:04:46 WrapperNode [2020-07-10 15:04:46,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-10 15:04:46,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-10 15:04:46,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-10 15:04:46,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-10 15:04:46,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:04:46" (1/1) ... [2020-07-10 15:04:46,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:04:46" (1/1) ... [2020-07-10 15:04:46,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:04:46" (1/1) ... [2020-07-10 15:04:46,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:04:46" (1/1) ... [2020-07-10 15:04:46,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:04:46" (1/1) ... [2020-07-10 15:04:46,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:04:46" (1/1) ... [2020-07-10 15:04:46,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:04:46" (1/1) ... [2020-07-10 15:04:46,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-10 15:04:46,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-10 15:04:46,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-10 15:04:46,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-10 15:04:46,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:04:46" (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 [2020-07-10 15:04:46,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-10 15:04:46,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-10 15:04:46,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-10 15:04:46,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-10 15:04:46,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-07-10 15:04:46,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-07-10 15:04:46,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-07-10 15:04:46,430 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-07-10 15:04:46,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-10 15:04:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-10 15:04:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-10 15:04:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-10 15:04:46,431 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-10 15:04:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-10 15:04:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-10 15:04:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-10 15:04:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-10 15:04:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-10 15:04:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-10 15:04:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-10 15:04:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-10 15:04:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-10 15:04:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-10 15:04:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-10 15:04:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-10 15:04:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-10 15:04:46,435 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-10 15:04:46,436 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-10 15:04:46,436 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-10 15:04:46,436 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-07-10 15:04:46,436 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-07-10 15:04:46,436 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-07-10 15:04:46,437 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-10 15:04:46,437 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-10 15:04:46,437 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-10 15:04:46,437 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-10 15:04:46,437 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-10 15:04:46,437 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-10 15:04:46,437 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-10 15:04:46,438 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-10 15:04:46,438 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-10 15:04:46,438 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-10 15:04:46,438 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-10 15:04:46,438 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-10 15:04:46,438 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-10 15:04:46,439 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-10 15:04:46,439 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-10 15:04:46,439 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-10 15:04:46,439 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-10 15:04:46,439 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-10 15:04:46,439 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-10 15:04:46,439 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-10 15:04:46,439 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-10 15:04:46,439 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-10 15:04:46,439 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-10 15:04:46,440 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-10 15:04:46,440 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-10 15:04:46,440 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-10 15:04:46,440 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-10 15:04:46,440 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-10 15:04:46,440 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-10 15:04:46,440 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-10 15:04:46,440 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-10 15:04:46,441 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-10 15:04:46,441 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-10 15:04:46,441 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-10 15:04:46,441 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-10 15:04:46,441 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-10 15:04:46,441 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-10 15:04:46,441 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-10 15:04:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-10 15:04:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-10 15:04:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-10 15:04:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-10 15:04:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-10 15:04:46,442 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-10 15:04:46,443 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-10 15:04:46,443 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-10 15:04:46,443 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-10 15:04:46,443 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-10 15:04:46,443 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-10 15:04:46,443 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-10 15:04:46,443 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-10 15:04:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-10 15:04:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-10 15:04:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-10 15:04:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-10 15:04:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-10 15:04:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-10 15:04:46,444 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-10 15:04:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-10 15:04:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-10 15:04:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-10 15:04:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-10 15:04:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-10 15:04:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-10 15:04:46,445 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-10 15:04:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-10 15:04:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-10 15:04:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-10 15:04:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-10 15:04:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-10 15:04:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-10 15:04:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-10 15:04:46,446 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-10 15:04:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-10 15:04:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-10 15:04:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-10 15:04:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-10 15:04:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-10 15:04:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-10 15:04:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-10 15:04:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-10 15:04:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-10 15:04:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-10 15:04:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-10 15:04:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-10 15:04:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-10 15:04:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-07-10 15:04:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-10 15:04:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-10 15:04:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-10 15:04:46,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-10 15:04:46,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-10 15:04:46,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-10 15:04:46,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-10 15:04:46,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-10 15:04:46,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-10 15:04:46,859 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-07-10 15:04:47,145 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-10 15:04:47,146 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-10 15:04:47,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 03:04:47 BoogieIcfgContainer [2020-07-10 15:04:47,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-10 15:04:47,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-10 15:04:47,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-10 15:04:47,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-10 15:04:47,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.07 03:04:45" (1/3) ... [2020-07-10 15:04:47,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df9d564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 03:04:47, skipping insertion in model container [2020-07-10 15:04:47,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.07 03:04:46" (2/3) ... [2020-07-10 15:04:47,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df9d564 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.07 03:04:47, skipping insertion in model container [2020-07-10 15:04:47,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.07 03:04:47" (3/3) ... [2020-07-10 15:04:47,169 INFO L109 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-07-10 15:04:47,181 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-10 15:04:47,189 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-10 15:04:47,202 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-10 15:04:47,225 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-10 15:04:47,225 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-10 15:04:47,225 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-10 15:04:47,225 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-10 15:04:47,225 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-10 15:04:47,226 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-10 15:04:47,226 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-10 15:04:47,226 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-10 15:04:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-10 15:04:47,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-10 15:04:47,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 15:04:47,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 15:04:47,252 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 15:04:47,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 15:04:47,258 INFO L82 PathProgramCache]: Analyzing trace with hash 209903222, now seen corresponding path program 1 times [2020-07-10 15:04:47,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-10 15:04:47,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163409489] [2020-07-10 15:04:47,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 15:04:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 15:04:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 15:04:47,505 INFO L280 TraceCheckUtils]: 0: Hoare triple {43#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))} #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; {38#true} is VALID [2020-07-10 15:04:47,505 INFO L280 TraceCheckUtils]: 1: Hoare triple {38#true} assume true; {38#true} is VALID [2020-07-10 15:04:47,506 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {38#true} {38#true} #111#return; {38#true} is VALID [2020-07-10 15:04:47,510 INFO L263 TraceCheckUtils]: 0: Hoare triple {38#true} call ULTIMATE.init(); {43#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))} is VALID [2020-07-10 15:04:47,511 INFO L280 TraceCheckUtils]: 1: Hoare triple {43#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))} #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; {38#true} is VALID [2020-07-10 15:04:47,511 INFO L280 TraceCheckUtils]: 2: Hoare triple {38#true} assume true; {38#true} is VALID [2020-07-10 15:04:47,511 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {38#true} {38#true} #111#return; {38#true} is VALID [2020-07-10 15:04:47,512 INFO L263 TraceCheckUtils]: 4: Hoare triple {38#true} call #t~ret12 := main(); {38#true} is VALID [2020-07-10 15:04:47,512 INFO L280 TraceCheckUtils]: 5: Hoare triple {38#true} ~flag~0 := 1;call #t~malloc2.base, #t~malloc2.offset := #Ultimate.allocOnHeap(8);~a~0.base, ~a~0.offset := #t~malloc2.base, #t~malloc2.offset; {38#true} is VALID [2020-07-10 15:04:47,512 INFO L280 TraceCheckUtils]: 6: Hoare triple {38#true} assume !(~a~0.base == 0 && ~a~0.offset == 0); {38#true} is VALID [2020-07-10 15:04:47,513 INFO L280 TraceCheckUtils]: 7: Hoare triple {38#true} havoc ~t~0.base, ~t~0.offset;~p~0.base, ~p~0.offset := ~a~0.base, ~a~0.offset; {38#true} is VALID [2020-07-10 15:04:47,518 INFO L280 TraceCheckUtils]: 8: Hoare triple {38#true} assume !true; {39#false} is VALID [2020-07-10 15:04:47,518 INFO L280 TraceCheckUtils]: 9: Hoare triple {39#false} call write~int(3, ~p~0.base, ~p~0.offset, 4);~p~0.base, ~p~0.offset := ~a~0.base, ~a~0.offset;~flag~0 := 1; {39#false} is VALID [2020-07-10 15:04:47,519 INFO L280 TraceCheckUtils]: 10: Hoare triple {39#false} call #t~mem6 := read~int(~p~0.base, ~p~0.offset, 4); {39#false} is VALID [2020-07-10 15:04:47,519 INFO L280 TraceCheckUtils]: 11: Hoare triple {39#false} assume !!(3 != #t~mem6);havoc #t~mem6; {39#false} is VALID [2020-07-10 15:04:47,519 INFO L280 TraceCheckUtils]: 12: Hoare triple {39#false} assume !(0 != ~flag~0);~flag~0 := 1;call #t~mem8 := read~int(~p~0.base, ~p~0.offset, 4); {39#false} is VALID [2020-07-10 15:04:47,520 INFO L280 TraceCheckUtils]: 13: Hoare triple {39#false} assume 2 != #t~mem8;havoc #t~mem8; {39#false} is VALID [2020-07-10 15:04:47,520 INFO L280 TraceCheckUtils]: 14: Hoare triple {39#false} assume !false; {39#false} is VALID [2020-07-10 15:04:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-10 15:04:47,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163409489] [2020-07-10 15:04:47,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 15:04:47,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-10 15:04:47,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103156426] [2020-07-10 15:04:47,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-10 15:04:47,536 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 15:04:47,540 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states. [2020-07-10 15:04:47,577 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 15 edges. 15 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 15:04:47,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-10 15:04:47,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-10 15:04:47,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-10 15:04:47,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-10 15:04:47,591 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-07-10 15:04:47,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:04:47,788 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-07-10 15:04:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-10 15:04:47,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-07-10 15:04:47,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 15:04:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-10 15:04:47,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2020-07-10 15:04:47,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-07-10 15:04:47,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2020-07-10 15:04:47,810 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 3 states and 69 transitions. [2020-07-10 15:04:47,900 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 69 edges. 69 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 15:04:47,912 INFO L225 Difference]: With dead ends: 52 [2020-07-10 15:04:47,913 INFO L226 Difference]: Without dead ends: 23 [2020-07-10 15:04:47,917 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 [2020-07-10 15:04:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-10 15:04:47,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-10 15:04:47,964 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 15:04:47,965 INFO L82 GeneralOperation]: Start isEquivalent. First operand 23 states. Second operand 23 states. [2020-07-10 15:04:47,966 INFO L74 IsIncluded]: Start isIncluded. First operand 23 states. Second operand 23 states. [2020-07-10 15:04:47,966 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 23 states. [2020-07-10 15:04:47,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:04:47,970 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-07-10 15:04:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-10 15:04:47,971 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 15:04:47,971 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 15:04:47,972 INFO L74 IsIncluded]: Start isIncluded. First operand 23 states. Second operand 23 states. [2020-07-10 15:04:47,972 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 23 states. [2020-07-10 15:04:47,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:04:47,976 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-07-10 15:04:47,976 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-10 15:04:47,977 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 15:04:47,977 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 15:04:47,977 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 15:04:47,978 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 15:04:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-10 15:04:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-07-10 15:04:47,982 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2020-07-10 15:04:47,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 15:04:47,983 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-07-10 15:04:47,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-10 15:04:47,983 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-07-10 15:04:47,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-10 15:04:47,984 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 15:04:47,984 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 15:04:47,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-10 15:04:47,985 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 15:04:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 15:04:47,986 INFO L82 PathProgramCache]: Analyzing trace with hash 919137993, now seen corresponding path program 1 times [2020-07-10 15:04:47,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-10 15:04:47,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986437786] [2020-07-10 15:04:47,986 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 15:04:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 15:04:48,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 15:04:48,118 INFO L280 TraceCheckUtils]: 0: Hoare triple {195#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))} #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; {189#true} is VALID [2020-07-10 15:04:48,119 INFO L280 TraceCheckUtils]: 1: Hoare triple {189#true} assume true; {189#true} is VALID [2020-07-10 15:04:48,119 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {189#true} {189#true} #111#return; {189#true} is VALID [2020-07-10 15:04:48,120 INFO L263 TraceCheckUtils]: 0: Hoare triple {189#true} call ULTIMATE.init(); {195#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))} is VALID [2020-07-10 15:04:48,121 INFO L280 TraceCheckUtils]: 1: Hoare triple {195#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))} #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; {189#true} is VALID [2020-07-10 15:04:48,121 INFO L280 TraceCheckUtils]: 2: Hoare triple {189#true} assume true; {189#true} is VALID [2020-07-10 15:04:48,121 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {189#true} {189#true} #111#return; {189#true} is VALID [2020-07-10 15:04:48,122 INFO L263 TraceCheckUtils]: 4: Hoare triple {189#true} call #t~ret12 := main(); {189#true} is VALID [2020-07-10 15:04:48,122 INFO L280 TraceCheckUtils]: 5: Hoare triple {189#true} ~flag~0 := 1;call #t~malloc2.base, #t~malloc2.offset := #Ultimate.allocOnHeap(8);~a~0.base, ~a~0.offset := #t~malloc2.base, #t~malloc2.offset; {189#true} is VALID [2020-07-10 15:04:48,122 INFO L280 TraceCheckUtils]: 6: Hoare triple {189#true} assume !(~a~0.base == 0 && ~a~0.offset == 0); {189#true} is VALID [2020-07-10 15:04:48,123 INFO L280 TraceCheckUtils]: 7: Hoare triple {189#true} havoc ~t~0.base, ~t~0.offset;~p~0.base, ~p~0.offset := ~a~0.base, ~a~0.offset; {189#true} is VALID [2020-07-10 15:04:48,123 INFO L280 TraceCheckUtils]: 8: Hoare triple {189#true} assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; {189#true} is VALID [2020-07-10 15:04:48,123 INFO L280 TraceCheckUtils]: 9: Hoare triple {189#true} assume !(0 != #t~nondet3);havoc #t~nondet3; {189#true} is VALID [2020-07-10 15:04:48,125 INFO L280 TraceCheckUtils]: 10: Hoare triple {189#true} call write~int(3, ~p~0.base, ~p~0.offset, 4);~p~0.base, ~p~0.offset := ~a~0.base, ~a~0.offset;~flag~0 := 1; {194#(= 1 main_~flag~0)} is VALID [2020-07-10 15:04:48,127 INFO L280 TraceCheckUtils]: 11: Hoare triple {194#(= 1 main_~flag~0)} call #t~mem6 := read~int(~p~0.base, ~p~0.offset, 4); {194#(= 1 main_~flag~0)} is VALID [2020-07-10 15:04:48,130 INFO L280 TraceCheckUtils]: 12: Hoare triple {194#(= 1 main_~flag~0)} assume !!(3 != #t~mem6);havoc #t~mem6; {194#(= 1 main_~flag~0)} is VALID [2020-07-10 15:04:48,131 INFO L280 TraceCheckUtils]: 13: Hoare triple {194#(= 1 main_~flag~0)} assume !(0 != ~flag~0);~flag~0 := 1;call #t~mem8 := read~int(~p~0.base, ~p~0.offset, 4); {190#false} is VALID [2020-07-10 15:04:48,131 INFO L280 TraceCheckUtils]: 14: Hoare triple {190#false} assume 2 != #t~mem8;havoc #t~mem8; {190#false} is VALID [2020-07-10 15:04:48,132 INFO L280 TraceCheckUtils]: 15: Hoare triple {190#false} assume !false; {190#false} is VALID [2020-07-10 15:04:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-10 15:04:48,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986437786] [2020-07-10 15:04:48,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 15:04:48,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-10 15:04:48,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121400304] [2020-07-10 15:04:48,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-10 15:04:48,136 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 15:04:48,137 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states. [2020-07-10 15:04:48,159 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 16 edges. 16 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 15:04:48,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-10 15:04:48,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-10 15:04:48,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-10 15:04:48,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-10 15:04:48,160 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2020-07-10 15:04:48,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:04:48,321 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-07-10 15:04:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-10 15:04:48,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-07-10 15:04:48,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 15:04:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-07-10 15:04:48,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2020-07-10 15:04:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-07-10 15:04:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2020-07-10 15:04:48,336 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 4 states and 61 transitions. [2020-07-10 15:04:48,420 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 61 edges. 61 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 15:04:48,422 INFO L225 Difference]: With dead ends: 51 [2020-07-10 15:04:48,423 INFO L226 Difference]: Without dead ends: 36 [2020-07-10 15:04:48,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-10 15:04:48,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-10 15:04:48,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-07-10 15:04:48,442 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 15:04:48,443 INFO L82 GeneralOperation]: Start isEquivalent. First operand 36 states. Second operand 33 states. [2020-07-10 15:04:48,443 INFO L74 IsIncluded]: Start isIncluded. First operand 36 states. Second operand 33 states. [2020-07-10 15:04:48,443 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 33 states. [2020-07-10 15:04:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:04:48,451 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-07-10 15:04:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-07-10 15:04:48,453 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 15:04:48,454 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 15:04:48,454 INFO L74 IsIncluded]: Start isIncluded. First operand 33 states. Second operand 36 states. [2020-07-10 15:04:48,456 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 36 states. [2020-07-10 15:04:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:04:48,462 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-07-10 15:04:48,462 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-07-10 15:04:48,463 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 15:04:48,463 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 15:04:48,463 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 15:04:48,463 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 15:04:48,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-10 15:04:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-07-10 15:04:48,466 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2020-07-10 15:04:48,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 15:04:48,467 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-07-10 15:04:48,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-10 15:04:48,467 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-07-10 15:04:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-10 15:04:48,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 15:04:48,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-10 15:04:48,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-10 15:04:48,468 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 15:04:48,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 15:04:48,469 INFO L82 PathProgramCache]: Analyzing trace with hash 919131049, now seen corresponding path program 1 times [2020-07-10 15:04:48,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-10 15:04:48,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903414557] [2020-07-10 15:04:48,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 15:04:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 15:04:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-10 15:04:48,580 INFO L280 TraceCheckUtils]: 0: Hoare triple {384#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))} #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; {376#true} is VALID [2020-07-10 15:04:48,581 INFO L280 TraceCheckUtils]: 1: Hoare triple {376#true} assume true; {376#true} is VALID [2020-07-10 15:04:48,581 INFO L275 TraceCheckUtils]: 2: Hoare quadruple {376#true} {376#true} #111#return; {376#true} is VALID [2020-07-10 15:04:48,598 INFO L263 TraceCheckUtils]: 0: Hoare triple {376#true} call ULTIMATE.init(); {384#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))} is VALID [2020-07-10 15:04:48,599 INFO L280 TraceCheckUtils]: 1: Hoare triple {384#(and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|))} #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier; {376#true} is VALID [2020-07-10 15:04:48,599 INFO L280 TraceCheckUtils]: 2: Hoare triple {376#true} assume true; {376#true} is VALID [2020-07-10 15:04:48,599 INFO L275 TraceCheckUtils]: 3: Hoare quadruple {376#true} {376#true} #111#return; {376#true} is VALID [2020-07-10 15:04:48,600 INFO L263 TraceCheckUtils]: 4: Hoare triple {376#true} call #t~ret12 := main(); {376#true} is VALID [2020-07-10 15:04:48,600 INFO L280 TraceCheckUtils]: 5: Hoare triple {376#true} ~flag~0 := 1;call #t~malloc2.base, #t~malloc2.offset := #Ultimate.allocOnHeap(8);~a~0.base, ~a~0.offset := #t~malloc2.base, #t~malloc2.offset; {376#true} is VALID [2020-07-10 15:04:48,602 INFO L280 TraceCheckUtils]: 6: Hoare triple {376#true} assume !(~a~0.base == 0 && ~a~0.offset == 0); {376#true} is VALID [2020-07-10 15:04:48,603 INFO L280 TraceCheckUtils]: 7: Hoare triple {376#true} havoc ~t~0.base, ~t~0.offset;~p~0.base, ~p~0.offset := ~a~0.base, ~a~0.offset; {381#(and (= main_~a~0.base main_~p~0.base) (= main_~a~0.offset main_~p~0.offset))} is VALID [2020-07-10 15:04:48,605 INFO L280 TraceCheckUtils]: 8: Hoare triple {381#(and (= main_~a~0.base main_~p~0.base) (= main_~a~0.offset main_~p~0.offset))} assume -2147483648 <= #t~nondet3 && #t~nondet3 <= 2147483647; {381#(and (= main_~a~0.base main_~p~0.base) (= main_~a~0.offset main_~p~0.offset))} is VALID [2020-07-10 15:04:48,606 INFO L280 TraceCheckUtils]: 9: Hoare triple {381#(and (= main_~a~0.base main_~p~0.base) (= main_~a~0.offset main_~p~0.offset))} assume !(0 != #t~nondet3);havoc #t~nondet3; {381#(and (= main_~a~0.base main_~p~0.base) (= main_~a~0.offset main_~p~0.offset))} is VALID [2020-07-10 15:04:48,608 INFO L280 TraceCheckUtils]: 10: Hoare triple {381#(and (= main_~a~0.base main_~p~0.base) (= main_~a~0.offset main_~p~0.offset))} call write~int(3, ~p~0.base, ~p~0.offset, 4);~p~0.base, ~p~0.offset := ~a~0.base, ~a~0.offset;~flag~0 := 1; {382#(= 3 (select (select |#memory_int| main_~p~0.base) main_~p~0.offset))} is VALID [2020-07-10 15:04:48,609 INFO L280 TraceCheckUtils]: 11: Hoare triple {382#(= 3 (select (select |#memory_int| main_~p~0.base) main_~p~0.offset))} call #t~mem6 := read~int(~p~0.base, ~p~0.offset, 4); {383#(= 3 |main_#t~mem6|)} is VALID [2020-07-10 15:04:48,610 INFO L280 TraceCheckUtils]: 12: Hoare triple {383#(= 3 |main_#t~mem6|)} assume !!(3 != #t~mem6);havoc #t~mem6; {377#false} is VALID [2020-07-10 15:04:48,610 INFO L280 TraceCheckUtils]: 13: Hoare triple {377#false} assume 0 != ~flag~0;~flag~0 := 0;call #t~mem7 := read~int(~p~0.base, ~p~0.offset, 4); {377#false} is VALID [2020-07-10 15:04:48,610 INFO L280 TraceCheckUtils]: 14: Hoare triple {377#false} assume 1 != #t~mem7;havoc #t~mem7; {377#false} is VALID [2020-07-10 15:04:48,611 INFO L280 TraceCheckUtils]: 15: Hoare triple {377#false} assume !false; {377#false} is VALID [2020-07-10 15:04:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-10 15:04:48,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903414557] [2020-07-10 15:04:48,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-10 15:04:48,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-10 15:04:48,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362191876] [2020-07-10 15:04:48,613 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-10 15:04:48,613 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-10 15:04:48,613 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states. [2020-07-10 15:04:48,632 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 16 edges. 16 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 15:04:48,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-10 15:04:48,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-10 15:04:48,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-10 15:04:48,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-10 15:04:48,634 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 6 states. [2020-07-10 15:04:48,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:04:48,950 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-07-10 15:04:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-10 15:04:48,956 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-10 15:04:48,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-10 15:04:48,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-07-10 15:04:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 54 transitions. [2020-07-10 15:04:48,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-07-10 15:04:48,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 54 transitions. [2020-07-10 15:04:48,963 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 6 states and 54 transitions. [2020-07-10 15:04:49,024 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 54 edges. 54 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-10 15:04:49,027 INFO L225 Difference]: With dead ends: 61 [2020-07-10 15:04:49,027 INFO L226 Difference]: Without dead ends: 46 [2020-07-10 15:04:49,028 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 [2020-07-10 15:04:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-10 15:04:49,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2020-07-10 15:04:49,043 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-10 15:04:49,043 INFO L82 GeneralOperation]: Start isEquivalent. First operand 46 states. Second operand 35 states. [2020-07-10 15:04:49,043 INFO L74 IsIncluded]: Start isIncluded. First operand 46 states. Second operand 35 states. [2020-07-10 15:04:49,044 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 35 states. [2020-07-10 15:04:49,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:04:49,047 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-07-10 15:04:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-07-10 15:04:49,048 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 15:04:49,048 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 15:04:49,049 INFO L74 IsIncluded]: Start isIncluded. First operand 35 states. Second operand 46 states. [2020-07-10 15:04:49,049 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 46 states. [2020-07-10 15:04:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-10 15:04:49,052 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-07-10 15:04:49,052 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-07-10 15:04:49,053 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-10 15:04:49,053 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-10 15:04:49,054 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-10 15:04:49,054 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-10 15:04:49,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-10 15:04:49,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-07-10 15:04:49,056 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 16 [2020-07-10 15:04:49,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-10 15:04:49,056 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-07-10 15:04:49,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-10 15:04:49,057 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-07-10 15:04:49,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-10 15:04:49,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-10 15:04:49,058 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] [2020-07-10 15:04:49,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-10 15:04:49,058 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-10 15:04:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-10 15:04:49,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1446652468, now seen corresponding path program 1 times [2020-07-10 15:04:49,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-10 15:04:49,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494001007] [2020-07-10 15:04:49,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-10 15:04:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-10 15:04:49,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-10 15:04:49,141 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-10 15:04:49,141 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-10 15:04:49,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-10 15:04:49,179 WARN L170 areAnnotationChecker]: ULTIMATE.initENTRY has no Hoare annotation [2020-07-10 15:04:49,180 WARN L170 areAnnotationChecker]: myexitENTRY has no Hoare annotation [2020-07-10 15:04:49,180 WARN L170 areAnnotationChecker]: __bswap_32ENTRY has no Hoare annotation [2020-07-10 15:04:49,180 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-10 15:04:49,180 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-10 15:04:49,180 WARN L170 areAnnotationChecker]: __bswap_64ENTRY has no Hoare annotation [2020-07-10 15:04:49,180 WARN L170 areAnnotationChecker]: __uint16_identityENTRY has no Hoare annotation [2020-07-10 15:04:49,180 WARN L170 areAnnotationChecker]: __uint64_identityENTRY has no Hoare annotation [2020-07-10 15:04:49,181 WARN L170 areAnnotationChecker]: mainENTRY has no Hoare annotation [2020-07-10 15:04:49,181 WARN L170 areAnnotationChecker]: __uint32_identityENTRY has no Hoare annotation [2020-07-10 15:04:49,181 WARN L170 areAnnotationChecker]: ULTIMATE.initFINAL has no Hoare annotation [2020-07-10 15:04:49,181 WARN L170 areAnnotationChecker]: L518 has no Hoare annotation [2020-07-10 15:04:49,181 WARN L170 areAnnotationChecker]: __bswap_32FINAL has no Hoare annotation [2020-07-10 15:04:49,181 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-10 15:04:49,181 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-10 15:04:49,181 WARN L170 areAnnotationChecker]: __bswap_64FINAL has no Hoare annotation [2020-07-10 15:04:49,181 WARN L170 areAnnotationChecker]: __uint16_identityFINAL has no Hoare annotation [2020-07-10 15:04:49,182 WARN L170 areAnnotationChecker]: __uint64_identityFINAL has no Hoare annotation [2020-07-10 15:04:49,182 WARN L170 areAnnotationChecker]: L523 has no Hoare annotation [2020-07-10 15:04:49,182 WARN L170 areAnnotationChecker]: L523 has no Hoare annotation [2020-07-10 15:04:49,182 WARN L170 areAnnotationChecker]: __uint32_identityFINAL has no Hoare annotation [2020-07-10 15:04:49,182 WARN L170 areAnnotationChecker]: ULTIMATE.initEXIT has no Hoare annotation [2020-07-10 15:04:49,184 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-10 15:04:49,184 WARN L170 areAnnotationChecker]: L523-1 has no Hoare annotation [2020-07-10 15:04:49,184 WARN L170 areAnnotationChecker]: L523-1 has no Hoare annotation [2020-07-10 15:04:49,184 WARN L170 areAnnotationChecker]: L523-3 has no Hoare annotation [2020-07-10 15:04:49,184 WARN L170 areAnnotationChecker]: L526-3 has no Hoare annotation [2020-07-10 15:04:49,184 WARN L170 areAnnotationChecker]: L526-3 has no Hoare annotation [2020-07-10 15:04:49,184 WARN L170 areAnnotationChecker]: L526-4 has no Hoare annotation [2020-07-10 15:04:49,185 WARN L170 areAnnotationChecker]: L526-1 has no Hoare annotation [2020-07-10 15:04:49,185 WARN L170 areAnnotationChecker]: L526-1 has no Hoare annotation [2020-07-10 15:04:49,185 WARN L170 areAnnotationChecker]: L542-3 has no Hoare annotation [2020-07-10 15:04:49,185 WARN L170 areAnnotationChecker]: L542-3 has no Hoare annotation [2020-07-10 15:04:49,185 WARN L170 areAnnotationChecker]: L527 has no Hoare annotation [2020-07-10 15:04:49,185 WARN L170 areAnnotationChecker]: L527 has no Hoare annotation [2020-07-10 15:04:49,185 WARN L170 areAnnotationChecker]: L542-4 has no Hoare annotation [2020-07-10 15:04:49,185 WARN L170 areAnnotationChecker]: L542-1 has no Hoare annotation [2020-07-10 15:04:49,185 WARN L170 areAnnotationChecker]: L542-1 has no Hoare annotation [2020-07-10 15:04:49,186 WARN L170 areAnnotationChecker]: L527-2 has no Hoare annotation [2020-07-10 15:04:49,186 WARN L170 areAnnotationChecker]: L555-3 has no Hoare annotation [2020-07-10 15:04:49,186 WARN L170 areAnnotationChecker]: L555-3 has no Hoare annotation [2020-07-10 15:04:49,186 WARN L170 areAnnotationChecker]: L543 has no Hoare annotation [2020-07-10 15:04:49,186 WARN L170 areAnnotationChecker]: L543 has no Hoare annotation [2020-07-10 15:04:49,186 WARN L170 areAnnotationChecker]: L535 has no Hoare annotation [2020-07-10 15:04:49,186 WARN L170 areAnnotationChecker]: L535 has no Hoare annotation [2020-07-10 15:04:49,186 WARN L170 areAnnotationChecker]: L555-4 has no Hoare annotation [2020-07-10 15:04:49,187 WARN L170 areAnnotationChecker]: L555-1 has no Hoare annotation [2020-07-10 15:04:49,187 WARN L170 areAnnotationChecker]: L555-1 has no Hoare annotation [2020-07-10 15:04:49,187 WARN L170 areAnnotationChecker]: L545 has no Hoare annotation [2020-07-10 15:04:49,187 WARN L170 areAnnotationChecker]: L545 has no Hoare annotation [2020-07-10 15:04:49,187 WARN L170 areAnnotationChecker]: L549 has no Hoare annotation [2020-07-10 15:04:49,187 WARN L170 areAnnotationChecker]: L549 has no Hoare annotation [2020-07-10 15:04:49,187 WARN L170 areAnnotationChecker]: L535-1 has no Hoare annotation [2020-07-10 15:04:49,187 WARN L170 areAnnotationChecker]: L535-1 has no Hoare annotation [2020-07-10 15:04:49,187 WARN L170 areAnnotationChecker]: L535-3 has no Hoare annotation [2020-07-10 15:04:49,188 WARN L170 areAnnotationChecker]: mainFINAL has no Hoare annotation [2020-07-10 15:04:49,188 WARN L170 areAnnotationChecker]: L550 has no Hoare annotation [2020-07-10 15:04:49,188 WARN L170 areAnnotationChecker]: L550 has no Hoare annotation [2020-07-10 15:04:49,188 WARN L170 areAnnotationChecker]: L543-2 has no Hoare annotation [2020-07-10 15:04:49,188 WARN L170 areAnnotationChecker]: mainEXIT has no Hoare annotation [2020-07-10 15:04:49,188 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-10 15:04:49,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.07 03:04:49 BoogieIcfgContainer [2020-07-10 15:04:49,192 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-10 15:04:49,195 INFO L168 Benchmark]: Toolchain (without parser) took 3627.29 ms. Allocated memory was 147.3 MB in the beginning and 243.8 MB in the end (delta: 96.5 MB). Free memory was 104.1 MB in the beginning and 138.6 MB in the end (delta: -34.6 MB). Peak memory consumption was 61.9 MB. Max. memory is 7.1 GB. [2020-07-10 15:04:49,197 INFO L168 Benchmark]: CDTParser took 1.61 ms. Allocated memory is still 147.3 MB. Free memory was 123.6 MB in the beginning and 123.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-10 15:04:49,198 INFO L168 Benchmark]: CACSL2BoogieTranslator took 713.89 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 103.9 MB in the beginning and 170.0 MB in the end (delta: -66.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. [2020-07-10 15:04:49,199 INFO L168 Benchmark]: Boogie Preprocessor took 75.70 ms. Allocated memory is still 205.0 MB. Free memory was 170.0 MB in the beginning and 166.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-07-10 15:04:49,201 INFO L168 Benchmark]: RCFGBuilder took 793.92 ms. Allocated memory is still 205.0 MB. Free memory was 166.9 MB in the beginning and 112.8 MB in the end (delta: 54.1 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. [2020-07-10 15:04:49,207 INFO L168 Benchmark]: TraceAbstraction took 2036.29 ms. Allocated memory was 205.0 MB in the beginning and 243.8 MB in the end (delta: 38.8 MB). Free memory was 112.2 MB in the beginning and 138.6 MB in the end (delta: -26.5 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-07-10 15:04:49,217 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.61 ms. Allocated memory is still 147.3 MB. Free memory was 123.6 MB in the beginning and 123.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 713.89 ms. Allocated memory was 147.3 MB in the beginning and 205.0 MB in the end (delta: 57.7 MB). Free memory was 103.9 MB in the beginning and 170.0 MB in the end (delta: -66.2 MB). Peak memory consumption was 22.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 75.70 ms. Allocated memory is still 205.0 MB. Free memory was 170.0 MB in the beginning and 166.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 793.92 ms. Allocated memory is still 205.0 MB. Free memory was 166.9 MB in the beginning and 112.8 MB in the end (delta: 54.1 MB). Peak memory consumption was 54.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2036.29 ms. Allocated memory was 205.0 MB in the beginning and 243.8 MB in the end (delta: 38.8 MB). Free memory was 112.2 MB in the beginning and 138.6 MB in the end (delta: -26.5 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 562]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = 1; [L522] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L523] COND FALSE !(a == 0) VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}] [L524] List t; [L525] List p = a; VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 2 [L529] flag = 0 VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L534] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L535] COND FALSE !(t == 0) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] flag = 1 VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-2:0}] [L542] EXPR p->h VAL [a={-1:0}, flag=1, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=2, t={-2:0}] [L542] COND TRUE p->h != 3 [L543] COND TRUE \read(flag) [L544] flag = 0 [L545] EXPR p->h VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-2:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=2, t={-2:0}] [L545] COND TRUE p->h != 1 [L562] __VERIFIER_error() VAL [a={-1:0}, flag=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, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 26 SDslu, 73 SDs, 0 SdLazy, 130 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 1522 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...