./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash efc45e5708d4a9b560055cd5abf7b168f9024833 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 05:48:31,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 05:48:31,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 05:48:31,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 05:48:31,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 05:48:31,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 05:48:31,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 05:48:31,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 05:48:31,209 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 05:48:31,210 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 05:48:31,211 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 05:48:31,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 05:48:31,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 05:48:31,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 05:48:31,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 05:48:31,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 05:48:31,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 05:48:31,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 05:48:31,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 05:48:31,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 05:48:31,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 05:48:31,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 05:48:31,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 05:48:31,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 05:48:31,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 05:48:31,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 05:48:31,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 05:48:31,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 05:48:31,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 05:48:31,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 05:48:31,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 05:48:31,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 05:48:31,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 05:48:31,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 05:48:31,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 05:48:31,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 05:48:31,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 05:48:31,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 05:48:31,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 05:48:31,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 05:48:31,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 05:48:31,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 05:48:31,271 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 05:48:31,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 05:48:31,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 05:48:31,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 05:48:31,274 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 05:48:31,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 05:48:31,274 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 05:48:31,274 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 05:48:31,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 05:48:31,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 05:48:31,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 05:48:31,275 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 05:48:31,276 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 05:48:31,276 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 05:48:31,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 05:48:31,276 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 05:48:31,277 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 05:48:31,277 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 05:48:31,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 05:48:31,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 05:48:31,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 05:48:31,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 05:48:31,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 05:48:31,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 05:48:31,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 05:48:31,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 05:48:31,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 05:48:31,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 05:48:31,280 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efc45e5708d4a9b560055cd5abf7b168f9024833 [2020-10-20 05:48:31,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 05:48:31,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 05:48:31,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 05:48:31,534 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 05:48:31,535 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 05:48:31,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2020-10-20 05:48:31,615 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/262d0d30e/128c34c6040547dcb68d543e1de08ce0/FLAG22d87f712 [2020-10-20 05:48:32,220 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 05:48:32,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2020-10-20 05:48:32,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/262d0d30e/128c34c6040547dcb68d543e1de08ce0/FLAG22d87f712 [2020-10-20 05:48:32,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/262d0d30e/128c34c6040547dcb68d543e1de08ce0 [2020-10-20 05:48:32,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 05:48:32,488 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 05:48:32,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 05:48:32,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 05:48:32,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 05:48:32,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:48:32" (1/1) ... [2020-10-20 05:48:32,502 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35ec381c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:32, skipping insertion in model container [2020-10-20 05:48:32,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:48:32" (1/1) ... [2020-10-20 05:48:32,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 05:48:32,575 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 05:48:32,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 05:48:32,952 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 05:48:33,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 05:48:33,105 INFO L208 MainTranslator]: Completed translation [2020-10-20 05:48:33,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33 WrapperNode [2020-10-20 05:48:33,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 05:48:33,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 05:48:33,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 05:48:33,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 05:48:33,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (1/1) ... [2020-10-20 05:48:33,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (1/1) ... [2020-10-20 05:48:33,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (1/1) ... [2020-10-20 05:48:33,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (1/1) ... [2020-10-20 05:48:33,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (1/1) ... [2020-10-20 05:48:33,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (1/1) ... [2020-10-20 05:48:33,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (1/1) ... [2020-10-20 05:48:33,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 05:48:33,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 05:48:33,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 05:48:33,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 05:48:33,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (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 [2020-10-20 05:48:33,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 05:48:33,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 05:48:33,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-20 05:48:33,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-20 05:48:33,245 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-20 05:48:33,245 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-20 05:48:33,246 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-20 05:48:33,246 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2020-10-20 05:48:33,246 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrchr [2020-10-20 05:48:33,246 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 05:48:33,247 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-20 05:48:33,247 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-20 05:48:33,247 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-20 05:48:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-20 05:48:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-20 05:48:33,248 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-20 05:48:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-20 05:48:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-20 05:48:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-20 05:48:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-20 05:48:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-20 05:48:33,251 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-20 05:48:33,251 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-20 05:48:33,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-20 05:48:33,252 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-20 05:48:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-20 05:48:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-20 05:48:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-20 05:48:33,255 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-20 05:48:33,256 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-20 05:48:33,256 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-20 05:48:33,256 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-20 05:48:33,256 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-20 05:48:33,256 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-20 05:48:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-20 05:48:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-20 05:48:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-20 05:48:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-20 05:48:33,257 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-20 05:48:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-20 05:48:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-20 05:48:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-20 05:48:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-20 05:48:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-20 05:48:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-20 05:48:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-20 05:48:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-20 05:48:33,258 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-20 05:48:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-20 05:48:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-20 05:48:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-20 05:48:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-20 05:48:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-20 05:48:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-20 05:48:33,259 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-20 05:48:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-20 05:48:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-20 05:48:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-20 05:48:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-20 05:48:33,260 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-20 05:48:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-20 05:48:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-20 05:48:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-20 05:48:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-20 05:48:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-20 05:48:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-20 05:48:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-20 05:48:33,261 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-20 05:48:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-20 05:48:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-20 05:48:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-20 05:48:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-20 05:48:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-20 05:48:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 05:48:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-20 05:48:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-20 05:48:33,262 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-20 05:48:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-20 05:48:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-20 05:48:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-20 05:48:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-20 05:48:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-20 05:48:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-20 05:48:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-20 05:48:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-20 05:48:33,263 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-20 05:48:33,264 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-20 05:48:33,264 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-20 05:48:33,264 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-20 05:48:33,265 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-20 05:48:33,266 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-20 05:48:33,266 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-20 05:48:33,266 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-20 05:48:33,266 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-20 05:48:33,266 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-20 05:48:33,266 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-20 05:48:33,266 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-20 05:48:33,266 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-20 05:48:33,267 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-20 05:48:33,267 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-20 05:48:33,267 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-20 05:48:33,267 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-20 05:48:33,267 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-20 05:48:33,267 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-20 05:48:33,267 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-20 05:48:33,267 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-20 05:48:33,267 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-20 05:48:33,268 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-20 05:48:33,268 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-20 05:48:33,268 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-20 05:48:33,268 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-20 05:48:33,268 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-20 05:48:33,268 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-20 05:48:33,268 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-20 05:48:33,268 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-20 05:48:33,268 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-20 05:48:33,269 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-20 05:48:33,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 05:48:33,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-20 05:48:33,269 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2020-10-20 05:48:33,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 05:48:33,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 05:48:33,270 INFO L130 BoogieDeclarations]: Found specification of procedure cstrchr [2020-10-20 05:48:33,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 05:48:33,271 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 05:48:33,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 05:48:33,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 05:48:33,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 05:48:33,822 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 05:48:33,823 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-20 05:48:33,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:48:33 BoogieIcfgContainer [2020-10-20 05:48:33,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 05:48:33,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 05:48:33,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 05:48:33,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 05:48:33,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:48:32" (1/3) ... [2020-10-20 05:48:33,833 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7024be95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:48:33, skipping insertion in model container [2020-10-20 05:48:33,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:48:33" (2/3) ... [2020-10-20 05:48:33,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7024be95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:48:33, skipping insertion in model container [2020-10-20 05:48:33,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:48:33" (3/3) ... [2020-10-20 05:48:33,836 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr_unsafe.i [2020-10-20 05:48:33,850 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 05:48:33,858 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-10-20 05:48:33,874 INFO L253 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-10-20 05:48:33,898 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 05:48:33,898 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 05:48:33,899 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 05:48:33,899 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 05:48:33,899 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 05:48:33,900 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 05:48:33,900 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 05:48:33,900 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 05:48:33,919 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-20 05:48:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 05:48:33,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:33,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:33,932 INFO L429 AbstractCegarLoop]: === Iteration 1 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:48:33,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:33,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183926, now seen corresponding path program 1 times [2020-10-20 05:48:33,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:33,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878221959] [2020-10-20 05:48:33,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:34,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:34,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878221959] [2020-10-20 05:48:34,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:48:34,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 05:48:34,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761000846] [2020-10-20 05:48:34,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 05:48:34,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:34,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 05:48:34,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 05:48:34,201 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-10-20 05:48:34,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:34,357 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-10-20 05:48:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 05:48:34,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-20 05:48:34,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:34,371 INFO L225 Difference]: With dead ends: 56 [2020-10-20 05:48:34,371 INFO L226 Difference]: Without dead ends: 53 [2020-10-20 05:48:34,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 05:48:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-20 05:48:34,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-20 05:48:34,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-20 05:48:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-10-20 05:48:34,418 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 11 [2020-10-20 05:48:34,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:34,419 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-10-20 05:48:34,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 05:48:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-10-20 05:48:34,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 05:48:34,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:34,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:34,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 05:48:34,421 INFO L429 AbstractCegarLoop]: === Iteration 2 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:48:34,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:34,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183616, now seen corresponding path program 1 times [2020-10-20 05:48:34,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:34,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667899490] [2020-10-20 05:48:34,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:34,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:34,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:34,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667899490] [2020-10-20 05:48:34,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:48:34,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 05:48:34,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876608457] [2020-10-20 05:48:34,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 05:48:34,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:34,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 05:48:34,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 05:48:34,533 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 4 states. [2020-10-20 05:48:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:34,709 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-20 05:48:34,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 05:48:34,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-20 05:48:34,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:34,712 INFO L225 Difference]: With dead ends: 51 [2020-10-20 05:48:34,712 INFO L226 Difference]: Without dead ends: 51 [2020-10-20 05:48:34,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 05:48:34,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-20 05:48:34,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-20 05:48:34,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-20 05:48:34,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-20 05:48:34,730 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 11 [2020-10-20 05:48:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:34,731 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-20 05:48:34,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 05:48:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-20 05:48:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 05:48:34,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:34,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:34,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 05:48:34,733 INFO L429 AbstractCegarLoop]: === Iteration 3 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:48:34,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:34,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183617, now seen corresponding path program 1 times [2020-10-20 05:48:34,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:34,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856118162] [2020-10-20 05:48:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:34,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:34,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856118162] [2020-10-20 05:48:34,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:48:34,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 05:48:34,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581828996] [2020-10-20 05:48:34,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:48:34,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:34,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:48:34,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:48:34,859 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 5 states. [2020-10-20 05:48:35,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:35,000 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-20 05:48:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:48:35,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 05:48:35,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:35,005 INFO L225 Difference]: With dead ends: 50 [2020-10-20 05:48:35,006 INFO L226 Difference]: Without dead ends: 50 [2020-10-20 05:48:35,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-20 05:48:35,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-20 05:48:35,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-20 05:48:35,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-20 05:48:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-10-20 05:48:35,014 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 11 [2020-10-20 05:48:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:35,015 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-10-20 05:48:35,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:48:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-10-20 05:48:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 05:48:35,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:35,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:35,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 05:48:35,017 INFO L429 AbstractCegarLoop]: === Iteration 4 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:48:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183670, now seen corresponding path program 1 times [2020-10-20 05:48:35,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:35,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649415111] [2020-10-20 05:48:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:35,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:35,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649415111] [2020-10-20 05:48:35,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:48:35,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 05:48:35,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346993569] [2020-10-20 05:48:35,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:48:35,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:35,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:48:35,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:48:35,093 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 5 states. [2020-10-20 05:48:35,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:35,194 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-10-20 05:48:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:48:35,194 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 05:48:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:35,198 INFO L225 Difference]: With dead ends: 56 [2020-10-20 05:48:35,198 INFO L226 Difference]: Without dead ends: 56 [2020-10-20 05:48:35,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-20 05:48:35,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-20 05:48:35,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-10-20 05:48:35,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-20 05:48:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-10-20 05:48:35,206 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 11 [2020-10-20 05:48:35,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:35,206 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-10-20 05:48:35,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:48:35,207 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-10-20 05:48:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 05:48:35,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:35,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:35,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 05:48:35,208 INFO L429 AbstractCegarLoop]: === Iteration 5 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:48:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:35,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1524243252, now seen corresponding path program 1 times [2020-10-20 05:48:35,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:35,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79113969] [2020-10-20 05:48:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:35,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:35,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79113969] [2020-10-20 05:48:35,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:48:35,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 05:48:35,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338128651] [2020-10-20 05:48:35,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:48:35,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:35,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:48:35,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:48:35,282 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 5 states. [2020-10-20 05:48:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:35,441 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-10-20 05:48:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 05:48:35,442 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 05:48:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:35,443 INFO L225 Difference]: With dead ends: 60 [2020-10-20 05:48:35,443 INFO L226 Difference]: Without dead ends: 60 [2020-10-20 05:48:35,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 05:48:35,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-20 05:48:35,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-10-20 05:48:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-20 05:48:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-20 05:48:35,450 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 11 [2020-10-20 05:48:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:35,450 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-20 05:48:35,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:48:35,451 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-20 05:48:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-20 05:48:35,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:35,452 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:35,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 05:48:35,452 INFO L429 AbstractCegarLoop]: === Iteration 6 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:48:35,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:35,453 INFO L82 PathProgramCache]: Analyzing trace with hash -583933833, now seen corresponding path program 1 times [2020-10-20 05:48:35,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:35,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055153037] [2020-10-20 05:48:35,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:35,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:35,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055153037] [2020-10-20 05:48:35,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733174292] [2020-10-20 05:48:35,577 INFO L95 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 [2020-10-20 05:48:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:35,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 05:48:35,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 05:48:35,778 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2020-10-20 05:48:35,779 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 05:48:35,791 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 05:48:35,791 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 05:48:35,792 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-20 05:48:35,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:35,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 05:48:35,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-20 05:48:35,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658831877] [2020-10-20 05:48:35,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-20 05:48:35,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:35,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-20 05:48:35,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-20 05:48:35,852 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 7 states. [2020-10-20 05:48:36,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:36,056 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-10-20 05:48:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 05:48:36,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-20 05:48:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:36,058 INFO L225 Difference]: With dead ends: 59 [2020-10-20 05:48:36,058 INFO L226 Difference]: Without dead ends: 59 [2020-10-20 05:48:36,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-20 05:48:36,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-20 05:48:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-10-20 05:48:36,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-20 05:48:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-20 05:48:36,065 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 15 [2020-10-20 05:48:36,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:36,065 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-20 05:48:36,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-20 05:48:36,066 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-20 05:48:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 05:48:36,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:36,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:36,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-20 05:48:36,292 INFO L429 AbstractCegarLoop]: === Iteration 7 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:48:36,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:36,292 INFO L82 PathProgramCache]: Analyzing trace with hash -269979680, now seen corresponding path program 1 times [2020-10-20 05:48:36,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:36,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105673521] [2020-10-20 05:48:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:36,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:36,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 05:48:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:36,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105673521] [2020-10-20 05:48:36,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:48:36,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-20 05:48:36,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488951427] [2020-10-20 05:48:36,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 05:48:36,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:36,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 05:48:36,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-20 05:48:36,429 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 10 states. [2020-10-20 05:48:36,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:36,682 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-10-20 05:48:36,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 05:48:36,682 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-20 05:48:36,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:36,683 INFO L225 Difference]: With dead ends: 47 [2020-10-20 05:48:36,683 INFO L226 Difference]: Without dead ends: 47 [2020-10-20 05:48:36,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-10-20 05:48:36,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-20 05:48:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-20 05:48:36,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-20 05:48:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-20 05:48:36,689 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 18 [2020-10-20 05:48:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:36,689 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-20 05:48:36,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 05:48:36,690 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-20 05:48:36,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 05:48:36,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:36,691 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:36,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 05:48:36,691 INFO L429 AbstractCegarLoop]: === Iteration 8 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:48:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:36,692 INFO L82 PathProgramCache]: Analyzing trace with hash -269979679, now seen corresponding path program 1 times [2020-10-20 05:48:36,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:36,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881638448] [2020-10-20 05:48:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:36,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:36,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 05:48:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:36,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881638448] [2020-10-20 05:48:36,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:48:36,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-20 05:48:36,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306681551] [2020-10-20 05:48:36,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 05:48:36,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:36,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 05:48:36,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-20 05:48:36,877 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 12 states. [2020-10-20 05:48:37,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:37,261 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-20 05:48:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 05:48:37,261 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-10-20 05:48:37,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:37,262 INFO L225 Difference]: With dead ends: 57 [2020-10-20 05:48:37,262 INFO L226 Difference]: Without dead ends: 57 [2020-10-20 05:48:37,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-20 05:48:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-20 05:48:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-10-20 05:48:37,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-20 05:48:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-20 05:48:37,268 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 18 [2020-10-20 05:48:37,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:37,268 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-20 05:48:37,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 05:48:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-20 05:48:37,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 05:48:37,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:37,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:37,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 05:48:37,269 INFO L429 AbstractCegarLoop]: === Iteration 9 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:48:37,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:37,270 INFO L82 PathProgramCache]: Analyzing trace with hash -463192456, now seen corresponding path program 1 times [2020-10-20 05:48:37,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:37,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377258832] [2020-10-20 05:48:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:37,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:37,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 05:48:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:37,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377258832] [2020-10-20 05:48:37,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:48:37,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 05:48:37,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285709388] [2020-10-20 05:48:37,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 05:48:37,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:37,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 05:48:37,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 05:48:37,321 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 5 states. [2020-10-20 05:48:37,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:37,451 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-10-20 05:48:37,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 05:48:37,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-20 05:48:37,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:37,453 INFO L225 Difference]: With dead ends: 55 [2020-10-20 05:48:37,453 INFO L226 Difference]: Without dead ends: 55 [2020-10-20 05:48:37,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-20 05:48:37,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-20 05:48:37,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-20 05:48:37,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-20 05:48:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-10-20 05:48:37,459 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2020-10-20 05:48:37,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:37,459 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-10-20 05:48:37,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 05:48:37,460 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-10-20 05:48:37,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 05:48:37,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:37,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:37,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-20 05:48:37,461 INFO L429 AbstractCegarLoop]: === Iteration 10 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:48:37,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:37,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1542788213, now seen corresponding path program 1 times [2020-10-20 05:48:37,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:37,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508242928] [2020-10-20 05:48:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:37,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:37,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:37,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 05:48:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:37,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508242928] [2020-10-20 05:48:37,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:48:37,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-20 05:48:37,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157468274] [2020-10-20 05:48:37,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 05:48:37,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:37,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 05:48:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-20 05:48:37,686 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 14 states. [2020-10-20 05:48:38,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:38,201 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2020-10-20 05:48:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 05:48:38,201 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-20 05:48:38,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:38,203 INFO L225 Difference]: With dead ends: 81 [2020-10-20 05:48:38,203 INFO L226 Difference]: Without dead ends: 81 [2020-10-20 05:48:38,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-20 05:48:38,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-20 05:48:38,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2020-10-20 05:48:38,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-20 05:48:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-10-20 05:48:38,211 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 24 [2020-10-20 05:48:38,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:38,211 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-10-20 05:48:38,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 05:48:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-10-20 05:48:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 05:48:38,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:38,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:38,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 05:48:38,214 INFO L429 AbstractCegarLoop]: === Iteration 11 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:48:38,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:38,214 INFO L82 PathProgramCache]: Analyzing trace with hash -45559689, now seen corresponding path program 1 times [2020-10-20 05:48:38,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:38,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749698617] [2020-10-20 05:48:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:38,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:38,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 05:48:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:38,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749698617] [2020-10-20 05:48:38,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:48:38,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-20 05:48:38,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481441282] [2020-10-20 05:48:38,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 05:48:38,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:38,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 05:48:38,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-20 05:48:38,475 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 15 states. [2020-10-20 05:48:38,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:38,949 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2020-10-20 05:48:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 05:48:38,950 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-20 05:48:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:38,951 INFO L225 Difference]: With dead ends: 101 [2020-10-20 05:48:38,951 INFO L226 Difference]: Without dead ends: 101 [2020-10-20 05:48:38,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-10-20 05:48:38,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-20 05:48:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 72. [2020-10-20 05:48:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-20 05:48:38,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-10-20 05:48:38,958 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 24 [2020-10-20 05:48:38,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:38,959 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-10-20 05:48:38,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 05:48:38,959 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-10-20 05:48:38,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 05:48:38,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:38,960 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:38,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-20 05:48:38,961 INFO L429 AbstractCegarLoop]: === Iteration 12 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:48:38,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:38,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1919056224, now seen corresponding path program 1 times [2020-10-20 05:48:38,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:38,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872292463] [2020-10-20 05:48:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:38,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:39,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:39,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 05:48:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:39,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-20 05:48:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:39,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872292463] [2020-10-20 05:48:39,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:48:39,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-20 05:48:39,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368583663] [2020-10-20 05:48:39,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 05:48:39,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:39,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 05:48:39,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-20 05:48:39,092 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 12 states. [2020-10-20 05:48:39,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:39,453 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-20 05:48:39,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 05:48:39,453 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-20 05:48:39,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:39,455 INFO L225 Difference]: With dead ends: 80 [2020-10-20 05:48:39,455 INFO L226 Difference]: Without dead ends: 80 [2020-10-20 05:48:39,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-10-20 05:48:39,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-20 05:48:39,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-20 05:48:39,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-20 05:48:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-10-20 05:48:39,463 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 27 [2020-10-20 05:48:39,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:39,463 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-10-20 05:48:39,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 05:48:39,463 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-10-20 05:48:39,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 05:48:39,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:39,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:39,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-20 05:48:39,465 INFO L429 AbstractCegarLoop]: === Iteration 13 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:48:39,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:39,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1919056223, now seen corresponding path program 1 times [2020-10-20 05:48:39,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:39,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570348371] [2020-10-20 05:48:39,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:39,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:39,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 05:48:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:39,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 05:48:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:39,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-20 05:48:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 05:48:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 05:48:39,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570348371] [2020-10-20 05:48:39,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 05:48:39,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-20 05:48:39,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200884713] [2020-10-20 05:48:39,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-20 05:48:39,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 05:48:39,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 05:48:39,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-20 05:48:39,742 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 15 states. [2020-10-20 05:48:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 05:48:40,294 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-20 05:48:40,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 05:48:40,296 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-20 05:48:40,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 05:48:40,298 INFO L225 Difference]: With dead ends: 88 [2020-10-20 05:48:40,298 INFO L226 Difference]: Without dead ends: 88 [2020-10-20 05:48:40,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-20 05:48:40,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-20 05:48:40,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-10-20 05:48:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-20 05:48:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-10-20 05:48:40,318 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 27 [2020-10-20 05:48:40,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 05:48:40,320 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-10-20 05:48:40,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-20 05:48:40,321 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-10-20 05:48:40,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 05:48:40,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 05:48:40,325 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 05:48:40,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-20 05:48:40,326 INFO L429 AbstractCegarLoop]: === Iteration 14 === [build_nondet_StringErr3REQUIRES_VIOLATION, build_nondet_StringErr2REQUIRES_VIOLATION, build_nondet_StringErr1REQUIRES_VIOLATION, build_nondet_StringErr0REQUIRES_VIOLATION, cstrchrErr0REQUIRES_VIOLATION, cstrchrErr5REQUIRES_VIOLATION, cstrchrErr1REQUIRES_VIOLATION, cstrchrErr3REQUIRES_VIOLATION, cstrchrErr2REQUIRES_VIOLATION, cstrchrErr4REQUIRES_VIOLATION, mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2020-10-20 05:48:40,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 05:48:40,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1917209182, now seen corresponding path program 1 times [2020-10-20 05:48:40,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 05:48:40,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018448424] [2020-10-20 05:48:40,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 05:48:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 05:48:40,346 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 05:48:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 05:48:40,356 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 05:48:40,379 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 05:48:40,380 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 05:48:40,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-20 05:48:40,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:48:40 BoogieIcfgContainer [2020-10-20 05:48:40,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 05:48:40,422 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 05:48:40,422 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 05:48:40,422 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 05:48:40,423 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:48:33" (3/4) ... [2020-10-20 05:48:40,425 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 05:48:40,483 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 05:48:40,483 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 05:48:40,485 INFO L168 Benchmark]: Toolchain (without parser) took 8004.42 ms. Allocated memory was 35.1 MB in the beginning and 92.8 MB in the end (delta: 57.7 MB). Free memory was 8.7 MB in the beginning and 23.7 MB in the end (delta: -15.0 MB). Peak memory consumption was 42.7 MB. Max. memory is 14.3 GB. [2020-10-20 05:48:40,486 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 34.6 MB. Free memory is still 14.6 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 05:48:40,487 INFO L168 Benchmark]: CACSL2BoogieTranslator took 615.92 ms. Allocated memory was 35.1 MB in the beginning and 45.1 MB in the end (delta: 10.0 MB). Free memory was 7.8 MB in the beginning and 16.2 MB in the end (delta: -8.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 14.3 GB. [2020-10-20 05:48:40,487 INFO L168 Benchmark]: Boogie Preprocessor took 68.74 ms. Allocated memory was 45.1 MB in the beginning and 46.1 MB in the end (delta: 1.0 MB). Free memory was 16.2 MB in the beginning and 27.6 MB in the end (delta: -11.5 MB). Peak memory consumption was 3.9 MB. Max. memory is 14.3 GB. [2020-10-20 05:48:40,488 INFO L168 Benchmark]: RCFGBuilder took 649.57 ms. Allocated memory was 46.1 MB in the beginning and 49.3 MB in the end (delta: 3.1 MB). Free memory was 27.6 MB in the beginning and 21.2 MB in the end (delta: 6.4 MB). Peak memory consumption was 18.6 MB. Max. memory is 14.3 GB. [2020-10-20 05:48:40,489 INFO L168 Benchmark]: TraceAbstraction took 6593.84 ms. Allocated memory was 49.3 MB in the beginning and 92.8 MB in the end (delta: 43.5 MB). Free memory was 20.5 MB in the beginning and 26.2 MB in the end (delta: -5.7 MB). Peak memory consumption was 37.8 MB. Max. memory is 14.3 GB. [2020-10-20 05:48:40,490 INFO L168 Benchmark]: Witness Printer took 61.96 ms. Allocated memory is still 92.8 MB. Free memory was 26.2 MB in the beginning and 23.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.3 GB. [2020-10-20 05:48:40,493 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 34.6 MB. Free memory is still 14.6 MB. There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 615.92 ms. Allocated memory was 35.1 MB in the beginning and 45.1 MB in the end (delta: 10.0 MB). Free memory was 7.8 MB in the beginning and 16.2 MB in the end (delta: -8.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 68.74 ms. Allocated memory was 45.1 MB in the beginning and 46.1 MB in the end (delta: 1.0 MB). Free memory was 16.2 MB in the beginning and 27.6 MB in the end (delta: -11.5 MB). Peak memory consumption was 3.9 MB. Max. memory is 14.3 GB. * RCFGBuilder took 649.57 ms. Allocated memory was 46.1 MB in the beginning and 49.3 MB in the end (delta: 3.1 MB). Free memory was 27.6 MB in the beginning and 21.2 MB in the end (delta: 6.4 MB). Peak memory consumption was 18.6 MB. Max. memory is 14.3 GB. * TraceAbstraction took 6593.84 ms. Allocated memory was 49.3 MB in the beginning and 92.8 MB in the end (delta: 43.5 MB). Free memory was 20.5 MB in the beginning and 26.2 MB in the end (delta: -5.7 MB). Peak memory consumption was 37.8 MB. Max. memory is 14.3 GB. * Witness Printer took 61.96 ms. Allocated memory is still 92.8 MB. Free memory was 26.2 MB in the beginning and 23.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 537]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L536] CALL, EXPR build_nondet_String() [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; VAL [i=0, length=1, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L521] COND FALSE !(i < length - 1) VAL [i=0, length=1, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L526] nondetString[length-1] = '\0' VAL [i=0, length=1, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L527] return nondetString; VAL [\result={-1:0}, i=0, length=1, malloc(length * sizeof(char))={-1:0}, nondetString={-1:0}] [L536] RET, EXPR build_nondet_String() VAL [build_nondet_String()={-1:0}] [L536] char* s = build_nondet_String(); [L537] CALL cstrchr(s,__VERIFIER_nondet_int()) VAL [\old(c)=2, s={-1:0}] [L531] EXPR \read(*s) VAL [\old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L531] *s != '\0' && *s != (char)c VAL [*s != '\0' && *s != (char)c=0, \old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L531] COND FALSE !(*s != '\0' && *s != (char)c) [L533] EXPR \read(*s) VAL [\old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L533] EXPR (*s == c) ? (char *) s : 0 VAL [(*s == c) ? (char *) s : 0={0:0}, \old(c)=2, \read(*s)=0, c=2, s={-1:0}, s={-1:0}] [L533] return ( (*s == c) ? (char *) s : 0 ); [L537] RET cstrchr(s,__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=2, cstrchr(s,__VERIFIER_nondet_int())={0:0}, s={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 71 locations, 16 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.4s, OverallIterations: 14, TraceHistogramMax: 2, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 450 SDtfs, 854 SDslu, 794 SDs, 0 SdLazy, 2615 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 196 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=84occurred in iteration=13, 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, 13 MinimizatonAttempts, 66 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 231 ConstructedInterpolants, 0 QuantifiedInterpolants, 22663 SizeOfPredicates, 3 NumberOfNonLiveVariables, 69 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 4/7 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...