./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer --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 0.2.0-a4ecdab [2020-11-28 03:04:10,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:04:10,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:04:10,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:04:10,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:04:10,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:04:10,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:04:10,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:04:10,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:04:10,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:04:10,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:04:10,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:04:10,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:04:10,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:04:10,155 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:04:10,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:04:10,158 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:04:10,159 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:04:10,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:04:10,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:04:10,167 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:04:10,169 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:04:10,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:04:10,172 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:04:10,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:04:10,177 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:04:10,177 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:04:10,179 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:04:10,180 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:04:10,181 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:04:10,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:04:10,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:04:10,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:04:10,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:04:10,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:04:10,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:04:10,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:04:10,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:04:10,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:04:10,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:04:10,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:04:10,193 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-28 03:04:10,216 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:04:10,217 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:04:10,218 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:04:10,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:04:10,219 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:04:10,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:04:10,224 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:04:10,225 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:04:10,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:04:10,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:04:10,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:04:10,227 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 03:04:10,227 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 03:04:10,227 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 03:04:10,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:04:10,228 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 03:04:10,228 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:04:10,228 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:04:10,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:04:10,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:04:10,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:04:10,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:04:10,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:04:10,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:04:10,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:04:10,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:04:10,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:04:10,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:04:10,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efc45e5708d4a9b560055cd5abf7b168f9024833 [2020-11-28 03:04:10,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:04:10,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:04:10,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:04:10,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:04:10,562 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:04:10,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2020-11-28 03:04:10,663 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer/data/df90b2cf7/fbfbaa4dadb64861b51aa038dd4728a6/FLAG8e1b12a96 [2020-11-28 03:04:11,197 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:04:11,204 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2020-11-28 03:04:11,224 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer/data/df90b2cf7/fbfbaa4dadb64861b51aa038dd4728a6/FLAG8e1b12a96 [2020-11-28 03:04:11,509 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer/data/df90b2cf7/fbfbaa4dadb64861b51aa038dd4728a6 [2020-11-28 03:04:11,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:04:11,514 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-28 03:04:11,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:04:11,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:04:11,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:04:11,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:04:11" (1/1) ... [2020-11-28 03:04:11,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1810cda9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:11, skipping insertion in model container [2020-11-28 03:04:11,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:04:11" (1/1) ... [2020-11-28 03:04:11,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:04:11,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:04:11,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:04:11,940 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:04:11,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:04:12,028 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:04:12,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12 WrapperNode [2020-11-28 03:04:12,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:04:12,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:04:12,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:04:12,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:04:12,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... [2020-11-28 03:04:12,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:04:12,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:04:12,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:04:12,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:04:12,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer/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 [2020-11-28 03:04:12,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-28 03:04:12,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:04:12,162 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-28 03:04:12,164 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-28 03:04:12,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-28 03:04:12,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-28 03:04:12,166 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-28 03:04:12,166 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2020-11-28 03:04:12,166 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrchr [2020-11-28 03:04:12,167 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-28 03:04:12,168 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-28 03:04:12,169 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-28 03:04:12,169 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-28 03:04:12,169 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-28 03:04:12,170 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-28 03:04:12,170 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-28 03:04:12,173 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-28 03:04:12,173 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-28 03:04:12,173 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-28 03:04:12,173 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-28 03:04:12,173 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-28 03:04:12,174 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-28 03:04:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-28 03:04:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-28 03:04:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-28 03:04:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-28 03:04:12,175 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-28 03:04:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-28 03:04:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-28 03:04:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-28 03:04:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-28 03:04:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-28 03:04:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-28 03:04:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-28 03:04:12,176 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-28 03:04:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-28 03:04:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-28 03:04:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-28 03:04:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-28 03:04:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-28 03:04:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-28 03:04:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-28 03:04:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-28 03:04:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-28 03:04:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-28 03:04:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-28 03:04:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-28 03:04:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-28 03:04:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-28 03:04:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-28 03:04:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-28 03:04:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-28 03:04:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-28 03:04:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-28 03:04:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-28 03:04:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-28 03:04:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-28 03:04:12,179 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-28 03:04:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-28 03:04:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-28 03:04:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-28 03:04:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-28 03:04:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-28 03:04:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-28 03:04:12,180 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-28 03:04:12,181 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-28 03:04:12,181 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-28 03:04:12,181 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-28 03:04:12,181 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-28 03:04:12,181 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-28 03:04:12,181 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-28 03:04:12,181 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-28 03:04:12,181 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-28 03:04:12,182 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-28 03:04:12,182 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-28 03:04:12,182 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-28 03:04:12,182 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-28 03:04:12,182 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-28 03:04:12,182 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-28 03:04:12,182 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-28 03:04:12,182 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-28 03:04:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-28 03:04:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-28 03:04:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-28 03:04:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-28 03:04:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-28 03:04:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-28 03:04:12,183 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-28 03:04:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-28 03:04:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-28 03:04:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-28 03:04:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-28 03:04:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-28 03:04:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-28 03:04:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-28 03:04:12,184 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-28 03:04:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-28 03:04:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-28 03:04:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-28 03:04:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-28 03:04:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-28 03:04:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-28 03:04:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-28 03:04:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-28 03:04:12,185 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-28 03:04:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-28 03:04:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-28 03:04:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-28 03:04:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-28 03:04:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-28 03:04:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-28 03:04:12,186 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-28 03:04:12,187 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-28 03:04:12,187 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-28 03:04:12,187 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-28 03:04:12,187 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-28 03:04:12,187 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-28 03:04:12,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-28 03:04:12,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-28 03:04:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2020-11-28 03:04:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 03:04:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:04:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure cstrchr [2020-11-28 03:04:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:04:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-28 03:04:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:04:12,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-28 03:04:12,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:04:13,007 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:04:13,008 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-11-28 03:04:13,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:04:13 BoogieIcfgContainer [2020-11-28 03:04:13,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:04:13,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:04:13,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:04:13,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:04:13,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:04:11" (1/3) ... [2020-11-28 03:04:13,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73547bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:04:13, skipping insertion in model container [2020-11-28 03:04:13,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:04:12" (2/3) ... [2020-11-28 03:04:13,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73547bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:04:13, skipping insertion in model container [2020-11-28 03:04:13,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:04:13" (3/3) ... [2020-11-28 03:04:13,020 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr_unsafe.i [2020-11-28 03:04:13,029 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:04:13,037 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-11-28 03:04:13,048 INFO L253 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-11-28 03:04:13,069 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:04:13,070 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 03:04:13,070 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:04:13,070 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:04:13,070 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:04:13,070 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:04:13,070 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:04:13,070 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:04:13,086 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-11-28 03:04:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:04:13,094 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:13,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:13,096 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]=== [2020-11-28 03:04:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:13,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183926, now seen corresponding path program 1 times [2020-11-28 03:04:13,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:13,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777310268] [2020-11-28 03:04:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:13,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:13,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777310268] [2020-11-28 03:04:13,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:13,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:04:13,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467265716] [2020-11-28 03:04:13,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:04:13,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:13,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:04:13,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:04:13,317 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-11-28 03:04:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:13,471 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-11-28 03:04:13,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:04:13,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-28 03:04:13,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:13,495 INFO L225 Difference]: With dead ends: 56 [2020-11-28 03:04:13,495 INFO L226 Difference]: Without dead ends: 53 [2020-11-28 03:04:13,496 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 [2020-11-28 03:04:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-28 03:04:13,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-28 03:04:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-28 03:04:13,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-11-28 03:04:13,548 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 11 [2020-11-28 03:04:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:13,549 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-11-28 03:04:13,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:04:13,549 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-11-28 03:04:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:04:13,550 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:13,551 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:13,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:04:13,552 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]=== [2020-11-28 03:04:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:13,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183616, now seen corresponding path program 1 times [2020-11-28 03:04:13,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:13,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829233499] [2020-11-28 03:04:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:13,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:13,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:13,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829233499] [2020-11-28 03:04:13,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:13,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:04:13,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471044170] [2020-11-28 03:04:13,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:04:13,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:13,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:04:13,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:04:13,675 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 4 states. [2020-11-28 03:04:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:13,906 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-11-28 03:04:13,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:13,907 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 03:04:13,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:13,908 INFO L225 Difference]: With dead ends: 51 [2020-11-28 03:04:13,909 INFO L226 Difference]: Without dead ends: 51 [2020-11-28 03:04:13,909 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 [2020-11-28 03:04:13,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-28 03:04:13,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-11-28 03:04:13,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-28 03:04:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-11-28 03:04:13,918 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 11 [2020-11-28 03:04:13,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:13,918 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-11-28 03:04:13,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:04:13,918 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-11-28 03:04:13,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:04:13,919 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:13,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:13,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:04:13,919 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]=== [2020-11-28 03:04:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:13,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183617, now seen corresponding path program 1 times [2020-11-28 03:04:13,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:13,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049583607] [2020-11-28 03:04:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:14,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:14,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:14,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049583607] [2020-11-28 03:04:14,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:14,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:14,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011865383] [2020-11-28 03:04:14,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:04:14,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:14,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:04:14,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:14,017 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 5 states. [2020-11-28 03:04:14,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:14,190 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-11-28 03:04:14,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:04:14,191 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 03:04:14,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:14,192 INFO L225 Difference]: With dead ends: 50 [2020-11-28 03:04:14,192 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 03:04:14,193 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 [2020-11-28 03:04:14,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 03:04:14,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-11-28 03:04:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-28 03:04:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-11-28 03:04:14,199 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 11 [2020-11-28 03:04:14,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:14,205 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-11-28 03:04:14,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:04:14,205 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-11-28 03:04:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:04:14,213 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:14,214 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:14,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:04:14,214 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]=== [2020-11-28 03:04:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:14,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183670, now seen corresponding path program 1 times [2020-11-28 03:04:14,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:14,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417459959] [2020-11-28 03:04:14,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:14,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:14,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417459959] [2020-11-28 03:04:14,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:14,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:04:14,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740337015] [2020-11-28 03:04:14,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:04:14,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:14,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:04:14,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:14,299 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 5 states. [2020-11-28 03:04:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:14,439 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-11-28 03:04:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:04:14,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 03:04:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:14,442 INFO L225 Difference]: With dead ends: 56 [2020-11-28 03:04:14,443 INFO L226 Difference]: Without dead ends: 56 [2020-11-28 03:04:14,443 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 [2020-11-28 03:04:14,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-11-28 03:04:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2020-11-28 03:04:14,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-11-28 03:04:14,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2020-11-28 03:04:14,458 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 11 [2020-11-28 03:04:14,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:14,459 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2020-11-28 03:04:14,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:04:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2020-11-28 03:04:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:04:14,460 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:14,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:14,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:04:14,461 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]=== [2020-11-28 03:04:14,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:14,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1524243252, now seen corresponding path program 1 times [2020-11-28 03:04:14,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:14,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108524385] [2020-11-28 03:04:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:14,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:14,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108524385] [2020-11-28 03:04:14,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:14,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:04:14,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018547651] [2020-11-28 03:04:14,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:04:14,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:14,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:04:14,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:14,589 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 5 states. [2020-11-28 03:04:14,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:14,811 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2020-11-28 03:04:14,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:04:14,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 03:04:14,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:14,813 INFO L225 Difference]: With dead ends: 60 [2020-11-28 03:04:14,813 INFO L226 Difference]: Without dead ends: 60 [2020-11-28 03:04:14,814 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 [2020-11-28 03:04:14,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-28 03:04:14,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-11-28 03:04:14,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 03:04:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-11-28 03:04:14,826 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 11 [2020-11-28 03:04:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:14,826 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-11-28 03:04:14,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:04:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-11-28 03:04:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:04:14,828 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:14,828 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:14,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:04:14,829 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]=== [2020-11-28 03:04:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash -583933833, now seen corresponding path program 1 times [2020-11-28 03:04:14,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:14,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820765046] [2020-11-28 03:04:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:14,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:14,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820765046] [2020-11-28 03:04:14,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358297039] [2020-11-28 03:04:14,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer/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 [2020-11-28 03:04:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:15,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:04:15,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:04:15,237 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 [2020-11-28 03:04:15,238 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:04:15,294 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:04:15,295 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:04:15,295 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-28 03:04:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:15,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:04:15,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-28 03:04:15,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009725328] [2020-11-28 03:04:15,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:04:15,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:15,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:04:15,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:04:15,434 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 7 states. [2020-11-28 03:04:15,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:15,669 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-11-28 03:04:15,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:04:15,671 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-28 03:04:15,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:15,672 INFO L225 Difference]: With dead ends: 59 [2020-11-28 03:04:15,672 INFO L226 Difference]: Without dead ends: 59 [2020-11-28 03:04:15,672 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 [2020-11-28 03:04:15,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-28 03:04:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-11-28 03:04:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-28 03:04:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-11-28 03:04:15,678 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 15 [2020-11-28 03:04:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:15,679 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-11-28 03:04:15,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:04:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-11-28 03:04:15,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:04:15,685 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:15,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:15,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-28 03:04:15,900 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]=== [2020-11-28 03:04:15,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:15,901 INFO L82 PathProgramCache]: Analyzing trace with hash -269979680, now seen corresponding path program 1 times [2020-11-28 03:04:15,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:15,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799614868] [2020-11-28 03:04:15,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:15,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:16,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:04:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:16,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799614868] [2020-11-28 03:04:16,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:16,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-28 03:04:16,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187233700] [2020-11-28 03:04:16,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 03:04:16,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:16,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:04:16,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:04:16,067 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 10 states. [2020-11-28 03:04:16,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:16,400 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-11-28 03:04:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:04:16,401 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-11-28 03:04:16,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:16,402 INFO L225 Difference]: With dead ends: 47 [2020-11-28 03:04:16,402 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 03:04:16,402 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 [2020-11-28 03:04:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 03:04:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-28 03:04:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-28 03:04:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-11-28 03:04:16,411 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 18 [2020-11-28 03:04:16,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:16,412 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-11-28 03:04:16,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 03:04:16,412 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-11-28 03:04:16,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 03:04:16,412 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:16,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:04:16,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 03:04:16,413 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]=== [2020-11-28 03:04:16,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:16,413 INFO L82 PathProgramCache]: Analyzing trace with hash -269979679, now seen corresponding path program 1 times [2020-11-28 03:04:16,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:16,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883681650] [2020-11-28 03:04:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:16,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:16,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:16,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:04:16,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:16,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883681650] [2020-11-28 03:04:16,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:16,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-28 03:04:16,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338092385] [2020-11-28 03:04:16,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:04:16,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:16,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:04:16,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:04:16,746 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 12 states. [2020-11-28 03:04:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:17,142 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-11-28 03:04:17,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:04:17,143 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-11-28 03:04:17,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:17,144 INFO L225 Difference]: With dead ends: 57 [2020-11-28 03:04:17,144 INFO L226 Difference]: Without dead ends: 57 [2020-11-28 03:04:17,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:04:17,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-28 03:04:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2020-11-28 03:04:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-28 03:04:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-11-28 03:04:17,150 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 18 [2020-11-28 03:04:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:17,151 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-11-28 03:04:17,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:04:17,152 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-11-28 03:04:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-28 03:04:17,152 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:17,153 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] [2020-11-28 03:04:17,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 03:04:17,153 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]=== [2020-11-28 03:04:17,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:17,153 INFO L82 PathProgramCache]: Analyzing trace with hash -463192456, now seen corresponding path program 1 times [2020-11-28 03:04:17,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:17,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308969789] [2020-11-28 03:04:17,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:17,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:17,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:04:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:17,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308969789] [2020-11-28 03:04:17,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:17,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:04:17,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789297552] [2020-11-28 03:04:17,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:04:17,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:17,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:04:17,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:04:17,223 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 5 states. [2020-11-28 03:04:17,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:17,335 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-11-28 03:04:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:04:17,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-11-28 03:04:17,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:17,336 INFO L225 Difference]: With dead ends: 55 [2020-11-28 03:04:17,336 INFO L226 Difference]: Without dead ends: 55 [2020-11-28 03:04:17,337 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 [2020-11-28 03:04:17,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-28 03:04:17,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-11-28 03:04:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-28 03:04:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2020-11-28 03:04:17,341 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 22 [2020-11-28 03:04:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:17,341 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2020-11-28 03:04:17,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:04:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2020-11-28 03:04:17,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:04:17,342 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:17,343 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] [2020-11-28 03:04:17,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 03:04:17,343 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]=== [2020-11-28 03:04:17,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:17,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1542788213, now seen corresponding path program 1 times [2020-11-28 03:04:17,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:17,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619400179] [2020-11-28 03:04:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:17,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:17,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:04:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:17,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619400179] [2020-11-28 03:04:17,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:17,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-28 03:04:17,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181255223] [2020-11-28 03:04:17,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 03:04:17,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:17,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 03:04:17,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:04:17,624 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand 14 states. [2020-11-28 03:04:18,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:18,227 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2020-11-28 03:04:18,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 03:04:18,229 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-11-28 03:04:18,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:18,230 INFO L225 Difference]: With dead ends: 81 [2020-11-28 03:04:18,230 INFO L226 Difference]: Without dead ends: 81 [2020-11-28 03:04:18,231 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 [2020-11-28 03:04:18,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-28 03:04:18,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2020-11-28 03:04:18,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-28 03:04:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2020-11-28 03:04:18,237 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 24 [2020-11-28 03:04:18,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:18,237 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2020-11-28 03:04:18,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 03:04:18,238 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2020-11-28 03:04:18,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-28 03:04:18,239 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:18,239 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] [2020-11-28 03:04:18,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 03:04:18,239 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]=== [2020-11-28 03:04:18,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:18,240 INFO L82 PathProgramCache]: Analyzing trace with hash -45559689, now seen corresponding path program 1 times [2020-11-28 03:04:18,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:18,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082872842] [2020-11-28 03:04:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:18,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:18,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:04:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:18,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082872842] [2020-11-28 03:04:18,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:18,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-28 03:04:18,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353442037] [2020-11-28 03:04:18,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-28 03:04:18,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:18,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:04:18,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:04:18,769 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand 15 states. [2020-11-28 03:04:19,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:19,351 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2020-11-28 03:04:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 03:04:19,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-11-28 03:04:19,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:19,353 INFO L225 Difference]: With dead ends: 101 [2020-11-28 03:04:19,353 INFO L226 Difference]: Without dead ends: 101 [2020-11-28 03:04:19,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-11-28 03:04:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-28 03:04:19,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 72. [2020-11-28 03:04:19,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-28 03:04:19,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-11-28 03:04:19,359 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 24 [2020-11-28 03:04:19,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:19,359 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-11-28 03:04:19,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-28 03:04:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-11-28 03:04:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:04:19,367 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:19,367 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] [2020-11-28 03:04:19,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 03:04:19,368 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]=== [2020-11-28 03:04:19,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:19,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1919056224, now seen corresponding path program 1 times [2020-11-28 03:04:19,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:19,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830308990] [2020-11-28 03:04:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:19,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:19,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:04:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:19,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-28 03:04:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:19,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830308990] [2020-11-28 03:04:19,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:19,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-28 03:04:19,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982934041] [2020-11-28 03:04:19,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:04:19,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:19,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:04:19,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:04:19,586 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 12 states. [2020-11-28 03:04:20,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:20,020 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-11-28 03:04:20,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:04:20,021 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-11-28 03:04:20,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:20,022 INFO L225 Difference]: With dead ends: 80 [2020-11-28 03:04:20,022 INFO L226 Difference]: Without dead ends: 80 [2020-11-28 03:04:20,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:04:20,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-28 03:04:20,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-11-28 03:04:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-28 03:04:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-11-28 03:04:20,029 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 27 [2020-11-28 03:04:20,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:20,029 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-11-28 03:04:20,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:04:20,029 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-11-28 03:04:20,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:04:20,030 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:20,030 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] [2020-11-28 03:04:20,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 03:04:20,031 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]=== [2020-11-28 03:04:20,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:20,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1919056223, now seen corresponding path program 1 times [2020-11-28 03:04:20,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:20,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911572930] [2020-11-28 03:04:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:20,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-28 03:04:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:20,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-28 03:04:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:20,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-28 03:04:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:04:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:04:20,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911572930] [2020-11-28 03:04:20,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:04:20,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-11-28 03:04:20,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941011842] [2020-11-28 03:04:20,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-28 03:04:20,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:04:20,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:04:20,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:04:20,475 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 15 states. [2020-11-28 03:04:21,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:04:21,093 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-11-28 03:04:21,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-28 03:04:21,094 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-11-28 03:04:21,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:04:21,095 INFO L225 Difference]: With dead ends: 88 [2020-11-28 03:04:21,095 INFO L226 Difference]: Without dead ends: 88 [2020-11-28 03:04:21,095 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-11-28 03:04:21,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-28 03:04:21,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-11-28 03:04:21,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-28 03:04:21,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2020-11-28 03:04:21,102 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 27 [2020-11-28 03:04:21,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:04:21,102 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2020-11-28 03:04:21,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-28 03:04:21,103 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2020-11-28 03:04:21,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:04:21,104 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:04:21,104 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] [2020-11-28 03:04:21,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-28 03:04:21,104 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]=== [2020-11-28 03:04:21,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:04:21,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1917209182, now seen corresponding path program 1 times [2020-11-28 03:04:21,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:04:21,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894841829] [2020-11-28 03:04:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:04:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:04:21,133 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:04:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:04:21,152 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:04:21,182 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:04:21,183 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:04:21,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 03:04:21,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:04:21 BoogieIcfgContainer [2020-11-28 03:04:21,227 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:04:21,228 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:04:21,228 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:04:21,228 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:04:21,229 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:04:13" (3/4) ... [2020-11-28 03:04:21,231 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:04:21,312 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_33991688-d925-4877-ae44-7034c92b108d/bin/uautomizer/witness.graphml [2020-11-28 03:04:21,312 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:04:21,317 INFO L168 Benchmark]: Toolchain (without parser) took 9799.66 ms. Allocated memory was 100.7 MB in the beginning and 180.4 MB in the end (delta: 79.7 MB). Free memory was 71.6 MB in the beginning and 104.7 MB in the end (delta: -33.1 MB). Peak memory consumption was 47.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:21,318 INFO L168 Benchmark]: CDTParser took 1.29 ms. Allocated memory is still 100.7 MB. Free memory is still 60.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:04:21,319 INFO L168 Benchmark]: CACSL2BoogieTranslator took 513.91 ms. Allocated memory is still 100.7 MB. Free memory was 71.6 MB in the beginning and 66.8 MB in the end (delta: 4.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:21,319 INFO L168 Benchmark]: Boogie Preprocessor took 59.13 ms. Allocated memory is still 100.7 MB. Free memory was 66.8 MB in the beginning and 64.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:21,320 INFO L168 Benchmark]: RCFGBuilder took 920.12 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 64.4 MB in the beginning and 75.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:21,321 INFO L168 Benchmark]: TraceAbstraction took 8215.82 ms. Allocated memory was 121.6 MB in the beginning and 180.4 MB in the end (delta: 58.7 MB). Free memory was 74.6 MB in the beginning and 106.8 MB in the end (delta: -32.2 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:21,321 INFO L168 Benchmark]: Witness Printer took 84.60 ms. Allocated memory is still 180.4 MB. Free memory was 106.8 MB in the beginning and 104.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:04:21,324 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.29 ms. Allocated memory is still 100.7 MB. Free memory is still 60.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 513.91 ms. Allocated memory is still 100.7 MB. Free memory was 71.6 MB in the beginning and 66.8 MB in the end (delta: 4.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.13 ms. Allocated memory is still 100.7 MB. Free memory was 66.8 MB in the beginning and 64.4 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 920.12 ms. Allocated memory was 100.7 MB in the beginning and 121.6 MB in the end (delta: 21.0 MB). Free memory was 64.4 MB in the beginning and 75.0 MB in the end (delta: -10.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8215.82 ms. Allocated memory was 121.6 MB in the beginning and 180.4 MB in the end (delta: 58.7 MB). Free memory was 74.6 MB in the beginning and 106.8 MB in the end (delta: -32.2 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. * Witness Printer took 84.60 ms. Allocated memory is still 180.4 MB. Free memory was 106.8 MB in the beginning and 104.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 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: 8.1s, OverallIterations: 14, TraceHistogramMax: 2, AutomataDifference: 4.3s, 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, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 196 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.8s 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, 2.6s 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...