./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 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i -s /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/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 --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 10:50:20,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 10:50:20,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 10:50:20,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 10:50:20,183 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 10:50:20,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 10:50:20,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 10:50:20,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 10:50:20,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 10:50:20,190 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 10:50:20,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 10:50:20,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 10:50:20,192 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 10:50:20,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 10:50:20,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 10:50:20,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 10:50:20,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 10:50:20,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 10:50:20,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 10:50:20,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 10:50:20,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 10:50:20,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 10:50:20,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 10:50:20,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 10:50:20,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 10:50:20,210 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 10:50:20,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 10:50:20,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 10:50:20,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 10:50:20,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 10:50:20,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 10:50:20,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 10:50:20,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 10:50:20,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 10:50:20,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 10:50:20,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 10:50:20,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 10:50:20,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 10:50:20,217 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 10:50:20,218 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 10:50:20,218 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 10:50:20,219 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 10:50:20,232 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 10:50:20,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 10:50:20,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 10:50:20,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 10:50:20,234 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 10:50:20,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 10:50:20,234 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 10:50:20,234 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 10:50:20,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 10:50:20,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 10:50:20,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 10:50:20,235 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 10:50:20,235 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 10:50:20,236 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 10:50:20,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 10:50:20,236 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 10:50:20,236 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 10:50:20,237 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 10:50:20,237 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 10:50:20,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 10:50:20,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 10:50:20,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 10:50:20,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 10:50:20,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 10:50:20,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 10:50:20,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 10:50:20,239 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 10:50:20,239 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 10:50:20,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 10:50:20,239 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_5f5653c5-f643-4508-a4ef-845cd5e2b170/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 [2019-11-20 10:50:20,384 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 10:50:20,394 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 10:50:20,397 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 10:50:20,398 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 10:50:20,398 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 10:50:20,399 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2019-11-20 10:50:20,448 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/data/f18ebfd9a/2ce2b87e0f764464b9533f2e15145671/FLAGb387bf061 [2019-11-20 10:50:20,856 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 10:50:20,857 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/sv-benchmarks/c/array-memsafety/cstrchr_unsafe.i [2019-11-20 10:50:20,871 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/data/f18ebfd9a/2ce2b87e0f764464b9533f2e15145671/FLAGb387bf061 [2019-11-20 10:50:20,882 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/data/f18ebfd9a/2ce2b87e0f764464b9533f2e15145671 [2019-11-20 10:50:20,884 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 10:50:20,885 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 10:50:20,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 10:50:20,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 10:50:20,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 10:50:20,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:20" (1/1) ... [2019-11-20 10:50:20,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@114fe62c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:20, skipping insertion in model container [2019-11-20 10:50:20,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:50:20" (1/1) ... [2019-11-20 10:50:20,900 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 10:50:20,942 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 10:50:21,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:50:21,263 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 10:50:21,314 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:50:21,366 INFO L192 MainTranslator]: Completed translation [2019-11-20 10:50:21,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:21 WrapperNode [2019-11-20 10:50:21,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 10:50:21,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 10:50:21,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 10:50:21,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 10:50:21,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:21" (1/1) ... [2019-11-20 10:50:21,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:21" (1/1) ... [2019-11-20 10:50:21,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:21" (1/1) ... [2019-11-20 10:50:21,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:21" (1/1) ... [2019-11-20 10:50:21,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:21" (1/1) ... [2019-11-20 10:50:21,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:21" (1/1) ... [2019-11-20 10:50:21,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:21" (1/1) ... [2019-11-20 10:50:21,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 10:50:21,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 10:50:21,433 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 10:50:21,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 10:50:21,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/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 [2019-11-20 10:50:21,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 10:50:21,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 10:50:21,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 10:50:21,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 10:50:21,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 10:50:21,504 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 10:50:21,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 10:50:21,505 INFO L138 BoogieDeclarations]: Found implementation of procedure build_nondet_String [2019-11-20 10:50:21,505 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrchr [2019-11-20 10:50:21,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 10:50:21,506 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 10:50:21,506 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 10:50:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 10:50:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 10:50:21,507 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 10:50:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 10:50:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 10:50:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 10:50:21,508 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 10:50:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 10:50:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 10:50:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 10:50:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 10:50:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 10:50:21,509 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 10:50:21,510 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 10:50:21,510 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 10:50:21,510 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 10:50:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 10:50:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 10:50:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 10:50:21,511 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 10:50:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 10:50:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 10:50:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 10:50:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 10:50:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 10:50:21,512 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 10:50:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 10:50:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 10:50:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 10:50:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 10:50:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 10:50:21,513 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 10:50:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 10:50:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 10:50:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 10:50:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 10:50:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 10:50:21,514 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 10:50:21,515 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 10:50:21,515 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 10:50:21,515 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 10:50:21,515 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 10:50:21,515 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 10:50:21,516 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 10:50:21,516 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 10:50:21,516 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 10:50:21,516 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 10:50:21,516 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 10:50:21,517 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 10:50:21,517 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 10:50:21,517 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 10:50:21,517 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 10:50:21,517 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 10:50:21,517 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 10:50:21,518 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 10:50:21,518 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 10:50:21,519 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 10:50:21,520 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 10:50:21,520 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 10:50:21,521 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 10:50:21,521 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 10:50:21,522 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 10:50:21,522 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 10:50:21,523 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 10:50:21,523 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 10:50:21,523 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 10:50:21,523 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 10:50:21,523 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 10:50:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 10:50:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 10:50:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 10:50:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 10:50:21,524 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 10:50:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 10:50:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 10:50:21,525 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 10:50:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 10:50:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 10:50:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 10:50:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 10:50:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 10:50:21,526 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 10:50:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 10:50:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 10:50:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 10:50:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 10:50:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 10:50:21,527 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 10:50:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 10:50:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 10:50:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 10:50:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 10:50:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 10:50:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 10:50:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 10:50:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 10:50:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 10:50:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 10:50:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 10:50:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 10:50:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 10:50:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 10:50:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 10:50:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 10:50:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 10:50:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 10:50:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-20 10:50:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure build_nondet_String [2019-11-20 10:50:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 10:50:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-20 10:50:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure cstrchr [2019-11-20 10:50:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-20 10:50:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 10:50:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 10:50:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 10:50:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 10:50:22,230 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 10:50:22,230 INFO L285 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-20 10:50:22,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:22 BoogieIcfgContainer [2019-11-20 10:50:22,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 10:50:22,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 10:50:22,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 10:50:22,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 10:50:22,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:50:20" (1/3) ... [2019-11-20 10:50:22,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9962edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:22, skipping insertion in model container [2019-11-20 10:50:22,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:50:21" (2/3) ... [2019-11-20 10:50:22,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9962edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:50:22, skipping insertion in model container [2019-11-20 10:50:22,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:22" (3/3) ... [2019-11-20 10:50:22,238 INFO L109 eAbstractionObserver]: Analyzing ICFG cstrchr_unsafe.i [2019-11-20 10:50:22,247 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 10:50:22,254 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2019-11-20 10:50:22,264 INFO L249 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2019-11-20 10:50:22,281 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 10:50:22,281 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 10:50:22,281 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 10:50:22,281 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 10:50:22,282 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 10:50:22,282 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 10:50:22,282 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 10:50:22,282 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 10:50:22,299 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2019-11-20 10:50:22,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 10:50:22,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:22,313 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:50:22,314 INFO L410 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]=== [2019-11-20 10:50:22,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:22,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183926, now seen corresponding path program 1 times [2019-11-20 10:50:22,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:22,328 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [942092943] [2019-11-20 10:50:22,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:22,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-20 10:50:22,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:22,553 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:22,574 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [942092943] [2019-11-20 10:50:22,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:22,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 10:50:22,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2724999] [2019-11-20 10:50:22,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 10:50:22,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:22,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 10:50:22,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 10:50:22,595 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 2 states. [2019-11-20 10:50:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:22,622 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2019-11-20 10:50:22,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 10:50:22,623 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-20 10:50:22,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:22,635 INFO L225 Difference]: With dead ends: 56 [2019-11-20 10:50:22,636 INFO L226 Difference]: Without dead ends: 53 [2019-11-20 10:50:22,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 10:50:22,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-20 10:50:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-20 10:50:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-20 10:50:22,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-11-20 10:50:22,678 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 11 [2019-11-20 10:50:22,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:22,678 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-11-20 10:50:22,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 10:50:22,679 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-11-20 10:50:22,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 10:50:22,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:22,679 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:50:22,887 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:22,888 INFO L410 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]=== [2019-11-20 10:50:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:22,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183616, now seen corresponding path program 1 times [2019-11-20 10:50:22,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:22,889 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1062598429] [2019-11-20 10:50:22,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:23,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 10:50:23,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:23,140 INFO L377 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 [2019-11-20 10:50:23,140 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:23,177 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:23,177 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:23,177 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:50:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:23,190 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:23,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1062598429] [2019-11-20 10:50:23,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:23,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 10:50:23,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976576086] [2019-11-20 10:50:23,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 10:50:23,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:23,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 10:50:23,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:50:23,203 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 3 states. [2019-11-20 10:50:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:23,302 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2019-11-20 10:50:23,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 10:50:23,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-20 10:50:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:23,304 INFO L225 Difference]: With dead ends: 51 [2019-11-20 10:50:23,304 INFO L226 Difference]: Without dead ends: 51 [2019-11-20 10:50:23,305 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:50:23,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-20 10:50:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-20 10:50:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-20 10:50:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-20 10:50:23,311 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 11 [2019-11-20 10:50:23,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:23,314 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-20 10:50:23,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 10:50:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-20 10:50:23,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 10:50:23,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:23,315 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:50:23,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:23,524 INFO L410 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]=== [2019-11-20 10:50:23,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:23,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183617, now seen corresponding path program 1 times [2019-11-20 10:50:23,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:23,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [636856373] [2019-11-20 10:50:23,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:23,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 10:50:23,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:23,739 INFO L377 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 [2019-11-20 10:50:23,740 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:23,749 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:23,749 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:23,750 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2019-11-20 10:50:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:23,773 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:23,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [636856373] [2019-11-20 10:50:23,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:23,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 10:50:23,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499591706] [2019-11-20 10:50:23,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 10:50:23,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:23,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 10:50:23,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 10:50:23,901 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 6 states. [2019-11-20 10:50:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:24,214 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2019-11-20 10:50:24,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 10:50:24,215 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-20 10:50:24,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:24,218 INFO L225 Difference]: With dead ends: 60 [2019-11-20 10:50:24,218 INFO L226 Difference]: Without dead ends: 60 [2019-11-20 10:50:24,219 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 10:50:24,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-20 10:50:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2019-11-20 10:50:24,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-20 10:50:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-11-20 10:50:24,226 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 11 [2019-11-20 10:50:24,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:24,226 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-11-20 10:50:24,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 10:50:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-11-20 10:50:24,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 10:50:24,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:24,228 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:50:24,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:24,431 INFO L410 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]=== [2019-11-20 10:50:24,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:24,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1524183670, now seen corresponding path program 1 times [2019-11-20 10:50:24,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:24,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1509931172] [2019-11-20 10:50:24,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:24,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 10:50:24,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:24,651 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:24,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1509931172] [2019-11-20 10:50:24,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:24,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 10:50:24,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746440928] [2019-11-20 10:50:24,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 10:50:24,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:24,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 10:50:24,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 10:50:24,695 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 6 states. [2019-11-20 10:50:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:24,771 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2019-11-20 10:50:24,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 10:50:24,774 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-20 10:50:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:24,775 INFO L225 Difference]: With dead ends: 56 [2019-11-20 10:50:24,775 INFO L226 Difference]: Without dead ends: 56 [2019-11-20 10:50:24,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 10:50:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-20 10:50:24,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2019-11-20 10:50:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-20 10:50:24,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2019-11-20 10:50:24,786 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 11 [2019-11-20 10:50:24,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:24,786 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2019-11-20 10:50:24,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 10:50:24,786 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2019-11-20 10:50:24,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 10:50:24,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:24,787 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:50:24,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:24,992 INFO L410 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]=== [2019-11-20 10:50:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:24,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1524243252, now seen corresponding path program 1 times [2019-11-20 10:50:24,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:24,994 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [186707949] [2019-11-20 10:50:24,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:25,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 10:50:25,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:25,168 INFO L377 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 [2019-11-20 10:50:25,168 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:25,194 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:25,195 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:25,195 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2019-11-20 10:50:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:25,224 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:25,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [186707949] [2019-11-20 10:50:25,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:25,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 10:50:25,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095000919] [2019-11-20 10:50:25,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 10:50:25,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:25,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 10:50:25,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 10:50:25,330 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 5 states. [2019-11-20 10:50:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:25,601 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2019-11-20 10:50:25,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 10:50:25,602 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-20 10:50:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:25,603 INFO L225 Difference]: With dead ends: 60 [2019-11-20 10:50:25,603 INFO L226 Difference]: Without dead ends: 60 [2019-11-20 10:50:25,604 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 10:50:25,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-20 10:50:25,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2019-11-20 10:50:25,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-20 10:50:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2019-11-20 10:50:25,609 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 11 [2019-11-20 10:50:25,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:25,610 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2019-11-20 10:50:25,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 10:50:25,610 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2019-11-20 10:50:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 10:50:25,610 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:25,611 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:50:25,813 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:25,813 INFO L410 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]=== [2019-11-20 10:50:25,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:25,814 INFO L82 PathProgramCache]: Analyzing trace with hash -583933833, now seen corresponding path program 1 times [2019-11-20 10:50:25,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:25,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1040889297] [2019-11-20 10:50:25,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:25,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 10:50:25,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:26,016 INFO L377 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 [2019-11-20 10:50:26,016 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:26,036 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:26,036 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:26,037 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:16 [2019-11-20 10:50:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:26,172 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:26,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1040889297] [2019-11-20 10:50:26,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:50:26,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-20 10:50:26,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663160099] [2019-11-20 10:50:26,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 10:50:26,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:26,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 10:50:26,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-20 10:50:26,642 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 10 states. [2019-11-20 10:50:27,490 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-11-20 10:50:27,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:27,911 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2019-11-20 10:50:27,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 10:50:27,913 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-20 10:50:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:27,914 INFO L225 Difference]: With dead ends: 74 [2019-11-20 10:50:27,914 INFO L226 Difference]: Without dead ends: 74 [2019-11-20 10:50:27,914 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-11-20 10:50:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-20 10:50:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2019-11-20 10:50:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 10:50:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2019-11-20 10:50:27,920 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 15 [2019-11-20 10:50:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:27,920 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2019-11-20 10:50:27,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 10:50:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2019-11-20 10:50:27,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 10:50:27,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:27,921 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:50:28,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:28,124 INFO L410 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]=== [2019-11-20 10:50:28,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:28,124 INFO L82 PathProgramCache]: Analyzing trace with hash -269979680, now seen corresponding path program 1 times [2019-11-20 10:50:28,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:28,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [8721580] [2019-11-20 10:50:28,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:28,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 10:50:28,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:28,257 INFO L377 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 [2019-11-20 10:50:28,258 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:28,259 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:28,259 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:28,259 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:50:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:28,307 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:28,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [8721580] [2019-11-20 10:50:28,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:28,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2019-11-20 10:50:28,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596408884] [2019-11-20 10:50:28,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 10:50:28,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:28,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 10:50:28,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-20 10:50:28,378 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand 8 states. [2019-11-20 10:50:28,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:28,553 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2019-11-20 10:50:28,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 10:50:28,553 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-20 10:50:28,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:28,555 INFO L225 Difference]: With dead ends: 58 [2019-11-20 10:50:28,555 INFO L226 Difference]: Without dead ends: 58 [2019-11-20 10:50:28,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 10:50:28,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-20 10:50:28,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2019-11-20 10:50:28,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-20 10:50:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2019-11-20 10:50:28,562 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 18 [2019-11-20 10:50:28,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:28,562 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2019-11-20 10:50:28,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 10:50:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2019-11-20 10:50:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 10:50:28,563 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:28,563 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:50:28,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:28,764 INFO L410 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]=== [2019-11-20 10:50:28,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:28,764 INFO L82 PathProgramCache]: Analyzing trace with hash -269979679, now seen corresponding path program 1 times [2019-11-20 10:50:28,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:28,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2024366856] [2019-11-20 10:50:28,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:28,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 10:50:28,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:28,908 INFO L377 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 [2019-11-20 10:50:28,908 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:28,913 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:28,913 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:28,914 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 10:50:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:28,994 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:29,518 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2024366856] [2019-11-20 10:50:29,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:29,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2019-11-20 10:50:29,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453628072] [2019-11-20 10:50:29,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 10:50:29,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:29,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 10:50:29,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2019-11-20 10:50:29,520 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 16 states. [2019-11-20 10:50:30,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:30,834 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2019-11-20 10:50:30,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 10:50:30,835 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2019-11-20 10:50:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:30,836 INFO L225 Difference]: With dead ends: 97 [2019-11-20 10:50:30,836 INFO L226 Difference]: Without dead ends: 97 [2019-11-20 10:50:30,837 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2019-11-20 10:50:30,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-20 10:50:30,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2019-11-20 10:50:30,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-20 10:50:30,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2019-11-20 10:50:30,843 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 18 [2019-11-20 10:50:30,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:30,846 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2019-11-20 10:50:30,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 10:50:30,847 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2019-11-20 10:50:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 10:50:30,848 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:30,848 INFO L410 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] [2019-11-20 10:50:31,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:31,050 INFO L410 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]=== [2019-11-20 10:50:31,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:31,050 INFO L82 PathProgramCache]: Analyzing trace with hash -463192456, now seen corresponding path program 1 times [2019-11-20 10:50:31,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:31,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [99788171] [2019-11-20 10:50:31,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:31,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 10:50:31,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:31,188 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:31,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [99788171] [2019-11-20 10:50:31,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:31,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 10:50:31,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789056599] [2019-11-20 10:50:31,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 10:50:31,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:31,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 10:50:31,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:50:31,212 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand 3 states. [2019-11-20 10:50:31,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:31,223 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2019-11-20 10:50:31,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 10:50:31,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-11-20 10:50:31,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:31,225 INFO L225 Difference]: With dead ends: 81 [2019-11-20 10:50:31,225 INFO L226 Difference]: Without dead ends: 81 [2019-11-20 10:50:31,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:50:31,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-20 10:50:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-20 10:50:31,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-20 10:50:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2019-11-20 10:50:31,231 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 22 [2019-11-20 10:50:31,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:31,234 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2019-11-20 10:50:31,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 10:50:31,234 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2019-11-20 10:50:31,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 10:50:31,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:31,237 INFO L410 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] [2019-11-20 10:50:31,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:31,439 INFO L410 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]=== [2019-11-20 10:50:31,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:31,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1542788213, now seen corresponding path program 1 times [2019-11-20 10:50:31,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:31,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [476195530] [2019-11-20 10:50:31,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:31,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 10:50:31,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:31,595 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2019-11-20 10:50:31,595 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:31,599 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:31,600 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:31,600 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2019-11-20 10:50:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:31,783 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:31,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:32,096 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2019-11-20 10:50:32,105 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2019-11-20 10:50:32,107 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-11-20 10:50:32,115 INFO L567 ElimStorePlain]: treesize reduction 7, result has 46.2 percent of original size [2019-11-20 10:50:32,116 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:32,118 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:32,118 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:32,118 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2019-11-20 10:50:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:32,130 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [476195530] [2019-11-20 10:50:32,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:32,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [] total 20 [2019-11-20 10:50:32,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431301222] [2019-11-20 10:50:32,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 10:50:32,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:32,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 10:50:32,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2019-11-20 10:50:32,131 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 20 states. [2019-11-20 10:50:32,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:32,550 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2019-11-20 10:50:32,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 10:50:32,563 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2019-11-20 10:50:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:32,564 INFO L225 Difference]: With dead ends: 84 [2019-11-20 10:50:32,565 INFO L226 Difference]: Without dead ends: 84 [2019-11-20 10:50:32,565 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2019-11-20 10:50:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-20 10:50:32,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2019-11-20 10:50:32,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-20 10:50:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2019-11-20 10:50:32,571 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 24 [2019-11-20 10:50:32,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:32,571 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2019-11-20 10:50:32,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 10:50:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2019-11-20 10:50:32,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 10:50:32,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:32,572 INFO L410 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] [2019-11-20 10:50:32,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:32,773 INFO L410 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]=== [2019-11-20 10:50:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:32,773 INFO L82 PathProgramCache]: Analyzing trace with hash -45559689, now seen corresponding path program 1 times [2019-11-20 10:50:32,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:32,774 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1488877386] [2019-11-20 10:50:32,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:32,917 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 10:50:32,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:32,930 INFO L377 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 [2019-11-20 10:50:32,930 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:32,937 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:32,938 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:32,938 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:13 [2019-11-20 10:50:32,964 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2019-11-20 10:50:32,965 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:33,002 INFO L567 ElimStorePlain]: treesize reduction 20, result has 53.5 percent of original size [2019-11-20 10:50:33,002 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:33,002 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:23 [2019-11-20 10:50:33,450 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:33,451 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2019-11-20 10:50:33,451 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:33,456 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-20 10:50:33,474 INFO L567 ElimStorePlain]: treesize reduction 8, result has 69.2 percent of original size [2019-11-20 10:50:33,475 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:33,475 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:18 [2019-11-20 10:50:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:33,574 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:33,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 10:50:35,030 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2019-11-20 10:50:35,038 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 10:50:35,045 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 10:50:35,056 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2019-11-20 10:50:35,058 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:35,081 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:35,082 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:35,092 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2019-11-20 10:50:35,116 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2019-11-20 10:50:35,117 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2019-11-20 10:50:35,178 INFO L567 ElimStorePlain]: treesize reduction 7, result has 81.1 percent of original size [2019-11-20 10:50:35,179 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:35,191 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2019-11-20 10:50:35,212 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2019-11-20 10:50:35,213 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2019-11-20 10:50:35,284 INFO L567 ElimStorePlain]: treesize reduction 7, result has 81.1 percent of original size [2019-11-20 10:50:35,284 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:35,366 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:35,367 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-20 10:50:35,367 INFO L221 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:119, output treesize:83 [2019-11-20 10:50:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:35,648 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1488877386] [2019-11-20 10:50:35,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:50:35,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2019-11-20 10:50:35,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315191025] [2019-11-20 10:50:35,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-20 10:50:35,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:35,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-20 10:50:35,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2019-11-20 10:50:35,649 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 26 states. [2019-11-20 10:50:35,970 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-11-20 10:50:36,975 WARN L191 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2019-11-20 10:50:40,228 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2019-11-20 10:50:40,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:40,355 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2019-11-20 10:50:40,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-20 10:50:40,356 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 24 [2019-11-20 10:50:40,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:40,357 INFO L225 Difference]: With dead ends: 110 [2019-11-20 10:50:40,357 INFO L226 Difference]: Without dead ends: 110 [2019-11-20 10:50:40,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 10:50:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-20 10:50:40,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 85. [2019-11-20 10:50:40,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-20 10:50:40,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2019-11-20 10:50:40,364 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 24 [2019-11-20 10:50:40,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:40,364 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2019-11-20 10:50:40,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-20 10:50:40,365 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2019-11-20 10:50:40,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 10:50:40,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:40,365 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:50:40,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:40,569 INFO L410 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]=== [2019-11-20 10:50:40,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:40,569 INFO L82 PathProgramCache]: Analyzing trace with hash -361030019, now seen corresponding path program 2 times [2019-11-20 10:50:40,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:40,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1815909203] [2019-11-20 10:50:40,570 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:40,734 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 10:50:40,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:50:40,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 10:50:40,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:40,750 INFO L377 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 [2019-11-20 10:50:40,750 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:40,759 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:40,760 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:40,760 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:16 [2019-11-20 10:50:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:40,872 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:41,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1815909203] [2019-11-20 10:50:41,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:50:41,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2019-11-20 10:50:41,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641860259] [2019-11-20 10:50:41,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 10:50:41,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:41,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 10:50:41,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-11-20 10:50:41,682 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 15 states. [2019-11-20 10:50:43,371 WARN L191 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2019-11-20 10:50:45,494 WARN L191 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2019-11-20 10:50:46,130 WARN L191 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-11-20 10:50:48,547 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-11-20 10:50:48,850 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2019-11-20 10:50:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:49,430 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2019-11-20 10:50:49,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 10:50:49,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2019-11-20 10:50:49,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:49,432 INFO L225 Difference]: With dead ends: 133 [2019-11-20 10:50:49,433 INFO L226 Difference]: Without dead ends: 133 [2019-11-20 10:50:49,433 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2019-11-20 10:50:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-20 10:50:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 105. [2019-11-20 10:50:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-20 10:50:49,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2019-11-20 10:50:49,444 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 23 [2019-11-20 10:50:49,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:49,444 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2019-11-20 10:50:49,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 10:50:49,445 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2019-11-20 10:50:49,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 10:50:49,446 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:49,446 INFO L410 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] [2019-11-20 10:50:49,648 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:49,648 INFO L410 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]=== [2019-11-20 10:50:49,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:49,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1919056224, now seen corresponding path program 1 times [2019-11-20 10:50:49,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:49,649 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1433478529] [2019-11-20 10:50:49,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:49,785 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 10:50:49,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:49,804 INFO L377 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 [2019-11-20 10:50:49,804 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:49,807 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:49,807 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:49,807 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:50:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:49,918 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:50,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1433478529] [2019-11-20 10:50:50,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:50,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 9] imperfect sequences [] total 13 [2019-11-20 10:50:50,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058420371] [2019-11-20 10:50:50,070 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 10:50:50,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:50,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 10:50:50,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-20 10:50:50,071 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand 14 states. [2019-11-20 10:50:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:50,612 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2019-11-20 10:50:50,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 10:50:50,613 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-11-20 10:50:50,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:50,614 INFO L225 Difference]: With dead ends: 113 [2019-11-20 10:50:50,614 INFO L226 Difference]: Without dead ends: 113 [2019-11-20 10:50:50,614 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2019-11-20 10:50:50,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-20 10:50:50,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2019-11-20 10:50:50,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-20 10:50:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 130 transitions. [2019-11-20 10:50:50,621 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 130 transitions. Word has length 27 [2019-11-20 10:50:50,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:50,621 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 130 transitions. [2019-11-20 10:50:50,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 10:50:50,621 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 130 transitions. [2019-11-20 10:50:50,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 10:50:50,622 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:50,622 INFO L410 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] [2019-11-20 10:50:50,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:50,823 INFO L410 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]=== [2019-11-20 10:50:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:50,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1919056223, now seen corresponding path program 1 times [2019-11-20 10:50:50,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:50,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1287101817] [2019-11-20 10:50:50,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:50:50,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 10:50:50,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:50:50,986 INFO L377 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 [2019-11-20 10:50:50,987 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:50:50,992 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:50:50,993 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:50:50,993 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 10:50:51,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:51,183 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:50:52,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:50:52,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1287101817] [2019-11-20 10:50:52,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:50:52,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 10] imperfect sequences [] total 20 [2019-11-20 10:50:52,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424085474] [2019-11-20 10:50:52,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 10:50:52,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:50:52,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 10:50:52,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2019-11-20 10:50:52,249 INFO L87 Difference]: Start difference. First operand 112 states and 130 transitions. Second operand 21 states. [2019-11-20 10:50:53,427 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2019-11-20 10:50:54,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:50:54,465 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2019-11-20 10:50:54,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-20 10:50:54,466 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 27 [2019-11-20 10:50:54,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:50:54,467 INFO L225 Difference]: With dead ends: 124 [2019-11-20 10:50:54,468 INFO L226 Difference]: Without dead ends: 124 [2019-11-20 10:50:54,468 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2019-11-20 10:50:54,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2019-11-20 10:50:54,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 112. [2019-11-20 10:50:54,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-20 10:50:54,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2019-11-20 10:50:54,473 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 27 [2019-11-20 10:50:54,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:50:54,473 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2019-11-20 10:50:54,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 10:50:54,473 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2019-11-20 10:50:54,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 10:50:54,474 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:50:54,474 INFO L410 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] [2019-11-20 10:50:54,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:54,675 INFO L410 AbstractCegarLoop]: === Iteration 15 === [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]=== [2019-11-20 10:50:54,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:50:54,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1917209182, now seen corresponding path program 1 times [2019-11-20 10:50:54,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:50:54,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [570642750] [2019-11-20 10:50:54,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 10:50:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 10:50:54,907 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-20 10:50:54,907 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 10:50:55,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:50:55,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:50:55 BoogieIcfgContainer [2019-11-20 10:50:55,131 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 10:50:55,132 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 10:50:55,132 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 10:50:55,132 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 10:50:55,132 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:50:22" (3/4) ... [2019-11-20 10:50:55,134 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 10:50:55,183 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5f5653c5-f643-4508-a4ef-845cd5e2b170/bin/uautomizer/witness.graphml [2019-11-20 10:50:55,183 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 10:50:55,184 INFO L168 Benchmark]: Toolchain (without parser) took 34299.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.6 MB). Free memory was 940.6 MB in the beginning and 1.0 GB in the end (delta: -85.7 MB). Peak memory consumption was 109.9 MB. Max. memory is 11.5 GB. [2019-11-20 10:50:55,185 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:50:55,185 INFO L168 Benchmark]: CACSL2BoogieTranslator took 480.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -187.5 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. [2019-11-20 10:50:55,185 INFO L168 Benchmark]: Boogie Preprocessor took 65.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-11-20 10:50:55,185 INFO L168 Benchmark]: RCFGBuilder took 797.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 11.5 GB. [2019-11-20 10:50:55,185 INFO L168 Benchmark]: TraceAbstraction took 32899.35 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 51.4 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 42.2 MB). Peak memory consumption was 93.5 MB. Max. memory is 11.5 GB. [2019-11-20 10:50:55,186 INFO L168 Benchmark]: Witness Printer took 51.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 11.5 GB. [2019-11-20 10:50:55,187 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 480.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 940.6 MB in the beginning and 1.1 GB in the end (delta: -187.5 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 65.62 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 797.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 32899.35 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 51.4 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 42.2 MB). Peak memory consumption was 93.5 MB. Max. memory is 11.5 GB. * Witness Printer took 51.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 11.5 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)=4294967295, s={-1:0}] [L531] EXPR \read(*s) VAL [\old(c)=4294967295, \read(*s)=0, c=4294967295, s={-1:0}, s={-1:0}] [L531] *s != '\0' && *s != (char)c VAL [*s != '\0' && *s != (char)c=0, \old(c)=4294967295, \read(*s)=0, c=4294967295, s={-1:0}, s={-1:0}] [L531] COND FALSE !(*s != '\0' && *s != (char)c) [L533] EXPR \read(*s) VAL [\old(c)=4294967295, \read(*s)=0, c=4294967295, s={-1:0}, s={-1:0}] [L533] EXPR (*s == c) ? (char *) s : 0 VAL [(*s == c) ? (char *) s : 0={0:0}, \old(c)=4294967295, \read(*s)=0, c=4294967295, s={-1:0}, s={-1:0}] [L533] return ( (*s == c) ? (char *) s : 0 ); [L537] RET cstrchr(s,__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=-1, cstrchr(s,__VERIFIER_nondet_int())={0:0}, s={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 71 locations, 16 error locations. Result: UNSAFE, OverallTime: 32.8s, OverallIterations: 15, TraceHistogramMax: 4, AutomataDifference: 19.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 574 SDtfs, 873 SDslu, 2557 SDs, 0 SdLazy, 2433 SolverSat, 105 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 9.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 353 SyntacticMatches, 12 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 15.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred 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, 14 MinimizatonAttempts, 123 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 280 NumberOfCodeBlocks, 280 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 478 ConstructedInterpolants, 20 QuantifiedInterpolants, 84038 SizeOfPredicates, 67 NumberOfNonLiveVariables, 854 ConjunctsInSsa, 147 ConjunctsInUnsatCore, 28 InterpolantComputations, 22 PerfectInterpolantSequences, 4/46 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...