./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1915ee2ae984f6ece38fc0dcbac99e0ba37faddf ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 17:58:46,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 17:58:46,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 17:58:46,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 17:58:46,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 17:58:46,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 17:58:46,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 17:58:46,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 17:58:46,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 17:58:46,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 17:58:46,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 17:58:46,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 17:58:46,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 17:58:46,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 17:58:46,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 17:58:46,182 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 17:58:46,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 17:58:46,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 17:58:46,187 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 17:58:46,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 17:58:46,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 17:58:46,196 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 17:58:46,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 17:58:46,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 17:58:46,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 17:58:46,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 17:58:46,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 17:58:46,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 17:58:46,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 17:58:46,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 17:58:46,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 17:58:46,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 17:58:46,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 17:58:46,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 17:58:46,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 17:58:46,227 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 17:58:46,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 17:58:46,228 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 17:58:46,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 17:58:46,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 17:58:46,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 17:58:46,232 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 17:58:46,268 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 17:58:46,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 17:58:46,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 17:58:46,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 17:58:46,271 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 17:58:46,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 17:58:46,271 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 17:58:46,272 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 17:58:46,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 17:58:46,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 17:58:46,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 17:58:46,274 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 17:58:46,274 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 17:58:46,274 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 17:58:46,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 17:58:46,275 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 17:58:46,275 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 17:58:46,275 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 17:58:46,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 17:58:46,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 17:58:46,276 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 17:58:46,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 17:58:46,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 17:58:46,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 17:58:46,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 17:58:46,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 17:58:46,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 17:58:46,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 17:58:46,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1915ee2ae984f6ece38fc0dcbac99e0ba37faddf [2020-10-19 17:58:46,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 17:58:46,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 17:58:46,636 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 17:58:46,638 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 17:58:46,638 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 17:58:46,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i [2020-10-19 17:58:46,718 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc051c35a/2ff6e93f47894d19b6cfd56ea75e4586/FLAG1f6fb3218 [2020-10-19 17:58:47,218 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 17:58:47,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/rec_strlen-alloca-1.i [2020-10-19 17:58:47,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc051c35a/2ff6e93f47894d19b6cfd56ea75e4586/FLAG1f6fb3218 [2020-10-19 17:58:47,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc051c35a/2ff6e93f47894d19b6cfd56ea75e4586 [2020-10-19 17:58:47,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 17:58:47,587 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 17:58:47,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 17:58:47,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 17:58:47,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 17:58:47,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 05:58:47" (1/1) ... [2020-10-19 17:58:47,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f157ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:47, skipping insertion in model container [2020-10-19 17:58:47,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 05:58:47" (1/1) ... [2020-10-19 17:58:47,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 17:58:47,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 17:58:48,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 17:58:48,089 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 17:58:48,129 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 17:58:48,202 INFO L208 MainTranslator]: Completed translation [2020-10-19 17:58:48,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:48 WrapperNode [2020-10-19 17:58:48,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 17:58:48,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 17:58:48,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 17:58:48,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 17:58:48,221 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:48" (1/1) ... [2020-10-19 17:58:48,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:48" (1/1) ... [2020-10-19 17:58:48,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:48" (1/1) ... [2020-10-19 17:58:48,258 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:48" (1/1) ... [2020-10-19 17:58:48,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:48" (1/1) ... [2020-10-19 17:58:48,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:48" (1/1) ... [2020-10-19 17:58:48,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:48" (1/1) ... [2020-10-19 17:58:48,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 17:58:48,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 17:58:48,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 17:58:48,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 17:58:48,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 17:58:48,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 17:58:48,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 17:58:48,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-19 17:58:48,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-19 17:58:48,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-19 17:58:48,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-19 17:58:48,402 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-19 17:58:48,402 INFO L138 BoogieDeclarations]: Found implementation of procedure strlen_rec [2020-10-19 17:58:48,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 17:58:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-19 17:58:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-19 17:58:48,403 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-19 17:58:48,404 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-19 17:58:48,404 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-19 17:58:48,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-19 17:58:48,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-19 17:58:48,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-19 17:58:48,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-19 17:58:48,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-19 17:58:48,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-19 17:58:48,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-19 17:58:48,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-19 17:58:48,405 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-19 17:58:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-19 17:58:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-19 17:58:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-19 17:58:48,406 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-19 17:58:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-19 17:58:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-19 17:58:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-19 17:58:48,407 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-19 17:58:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-19 17:58:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-19 17:58:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-19 17:58:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-19 17:58:48,408 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-19 17:58:48,409 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-19 17:58:48,409 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-19 17:58:48,409 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-19 17:58:48,409 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-19 17:58:48,410 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-19 17:58:48,410 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-19 17:58:48,410 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-19 17:58:48,410 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-19 17:58:48,410 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-19 17:58:48,410 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-19 17:58:48,410 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-19 17:58:48,411 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-19 17:58:48,411 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-19 17:58:48,411 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-19 17:58:48,411 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-19 17:58:48,411 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-19 17:58:48,411 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-19 17:58:48,411 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-19 17:58:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-19 17:58:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-19 17:58:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-19 17:58:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-19 17:58:48,412 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-19 17:58:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-19 17:58:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-19 17:58:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-19 17:58:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-19 17:58:48,413 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-19 17:58:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-19 17:58:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-19 17:58:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-19 17:58:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 17:58:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-19 17:58:48,414 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-19 17:58:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-19 17:58:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-19 17:58:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 17:58:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-19 17:58:48,415 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-19 17:58:48,416 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-19 17:58:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-19 17:58:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-19 17:58:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-19 17:58:48,417 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-19 17:58:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-19 17:58:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-19 17:58:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-19 17:58:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-19 17:58:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-19 17:58:48,418 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-19 17:58:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-19 17:58:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-19 17:58:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-19 17:58:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-19 17:58:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-19 17:58:48,419 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-19 17:58:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-19 17:58:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-19 17:58:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-19 17:58:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-19 17:58:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-19 17:58:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-19 17:58:48,420 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-19 17:58:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-19 17:58:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-19 17:58:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-19 17:58:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-19 17:58:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-19 17:58:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-19 17:58:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-19 17:58:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-19 17:58:48,421 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-19 17:58:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-19 17:58:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-19 17:58:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-19 17:58:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-19 17:58:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-19 17:58:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-19 17:58:48,422 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-19 17:58:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-19 17:58:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 17:58:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-19 17:58:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure strlen_rec [2020-10-19 17:58:48,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 17:58:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 17:58:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 17:58:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 17:58:48,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 17:58:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 17:58:48,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 17:58:48,872 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 17:58:48,873 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-19 17:58:48,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:58:48 BoogieIcfgContainer [2020-10-19 17:58:48,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 17:58:48,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 17:58:48,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 17:58:48,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 17:58:48,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 05:58:47" (1/3) ... [2020-10-19 17:58:48,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695e9095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 05:58:48, skipping insertion in model container [2020-10-19 17:58:48,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 05:58:48" (2/3) ... [2020-10-19 17:58:48,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@695e9095 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 05:58:48, skipping insertion in model container [2020-10-19 17:58:48,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:58:48" (3/3) ... [2020-10-19 17:58:48,885 INFO L111 eAbstractionObserver]: Analyzing ICFG rec_strlen-alloca-1.i [2020-10-19 17:58:48,897 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 17:58:48,904 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-10-19 17:58:48,917 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-10-19 17:58:48,936 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 17:58:48,936 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 17:58:48,936 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 17:58:48,936 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 17:58:48,937 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 17:58:48,938 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 17:58:48,938 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 17:58:48,938 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 17:58:48,956 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-19 17:58:48,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 17:58:48,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:58:48,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:58:48,968 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:58:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:58:48,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2117754822, now seen corresponding path program 1 times [2020-10-19 17:58:48,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:58:48,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945054326] [2020-10-19 17:58:48,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:58:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:49,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:58:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:49,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945054326] [2020-10-19 17:58:49,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:58:49,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 17:58:49,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367080647] [2020-10-19 17:58:49,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 17:58:49,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:58:49,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 17:58:49,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 17:58:49,229 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-10-19 17:58:49,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:58:49,354 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-10-19 17:58:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 17:58:49,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-19 17:58:49,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:58:49,367 INFO L225 Difference]: With dead ends: 31 [2020-10-19 17:58:49,367 INFO L226 Difference]: Without dead ends: 28 [2020-10-19 17:58:49,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 17:58:49,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-19 17:58:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-19 17:58:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-19 17:58:49,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-19 17:58:49,420 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 10 [2020-10-19 17:58:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:58:49,421 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-19 17:58:49,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 17:58:49,421 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-19 17:58:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 17:58:49,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:58:49,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:58:49,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 17:58:49,423 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:58:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:58:49,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2117754821, now seen corresponding path program 1 times [2020-10-19 17:58:49,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:58:49,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530188774] [2020-10-19 17:58:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:58:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:49,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:58:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:49,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530188774] [2020-10-19 17:58:49,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:58:49,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:58:49,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198217898] [2020-10-19 17:58:49,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:58:49,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:58:49,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:58:49,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:58:49,521 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-10-19 17:58:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:58:49,613 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-19 17:58:49,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 17:58:49,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-19 17:58:49,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:58:49,615 INFO L225 Difference]: With dead ends: 27 [2020-10-19 17:58:49,615 INFO L226 Difference]: Without dead ends: 27 [2020-10-19 17:58:49,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:58:49,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-19 17:58:49,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-19 17:58:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-19 17:58:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-19 17:58:49,622 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2020-10-19 17:58:49,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:58:49,622 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-19 17:58:49,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:58:49,622 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-19 17:58:49,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 17:58:49,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:58:49,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:58:49,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 17:58:49,624 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:58:49,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:58:49,624 INFO L82 PathProgramCache]: Analyzing trace with hash -2117754768, now seen corresponding path program 1 times [2020-10-19 17:58:49,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:58:49,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485548656] [2020-10-19 17:58:49,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:58:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:49,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:58:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:49,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485548656] [2020-10-19 17:58:49,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:58:49,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 17:58:49,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477050989] [2020-10-19 17:58:49,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:58:49,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:58:49,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:58:49,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:58:49,718 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-19 17:58:49,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:58:49,802 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-10-19 17:58:49,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 17:58:49,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-19 17:58:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:58:49,804 INFO L225 Difference]: With dead ends: 34 [2020-10-19 17:58:49,805 INFO L226 Difference]: Without dead ends: 34 [2020-10-19 17:58:49,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:58:49,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-19 17:58:49,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2020-10-19 17:58:49,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-19 17:58:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-19 17:58:49,814 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 10 [2020-10-19 17:58:49,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:58:49,815 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-19 17:58:49,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:58:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-19 17:58:49,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 17:58:49,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:58:49,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:58:49,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 17:58:49,817 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:58:49,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:58:49,818 INFO L82 PathProgramCache]: Analyzing trace with hash -2117695186, now seen corresponding path program 1 times [2020-10-19 17:58:49,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:58:49,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330511181] [2020-10-19 17:58:49,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:58:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:49,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:58:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:49,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330511181] [2020-10-19 17:58:49,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:58:49,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:58:49,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908394800] [2020-10-19 17:58:49,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:58:49,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:58:49,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:58:49,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:58:49,886 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-19 17:58:50,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:58:50,004 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-10-19 17:58:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:58:50,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-19 17:58:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:58:50,006 INFO L225 Difference]: With dead ends: 38 [2020-10-19 17:58:50,006 INFO L226 Difference]: Without dead ends: 38 [2020-10-19 17:58:50,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:58:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-19 17:58:50,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-10-19 17:58:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-19 17:58:50,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-19 17:58:50,013 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 10 [2020-10-19 17:58:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:58:50,014 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-19 17:58:50,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:58:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-19 17:58:50,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-19 17:58:50,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:58:50,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:58:50,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 17:58:50,016 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:58:50,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:58:50,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1259263901, now seen corresponding path program 1 times [2020-10-19 17:58:50,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:58:50,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957698463] [2020-10-19 17:58:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:58:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:50,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:58:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:50,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957698463] [2020-10-19 17:58:50,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:58:50,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 17:58:50,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692436407] [2020-10-19 17:58:50,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 17:58:50,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:58:50,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 17:58:50,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 17:58:50,112 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2020-10-19 17:58:50,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:58:50,241 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-10-19 17:58:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:58:50,241 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-19 17:58:50,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:58:50,242 INFO L225 Difference]: With dead ends: 30 [2020-10-19 17:58:50,243 INFO L226 Difference]: Without dead ends: 30 [2020-10-19 17:58:50,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-19 17:58:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-19 17:58:50,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-19 17:58:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 17:58:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-19 17:58:50,249 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 13 [2020-10-19 17:58:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:58:50,249 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-19 17:58:50,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 17:58:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-19 17:58:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-19 17:58:50,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:58:50,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:58:50,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 17:58:50,252 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:58:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:58:50,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1259263900, now seen corresponding path program 1 times [2020-10-19 17:58:50,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:58:50,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433229704] [2020-10-19 17:58:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:58:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:50,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:58:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:50,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433229704] [2020-10-19 17:58:50,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:58:50,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 17:58:50,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145960843] [2020-10-19 17:58:50,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:58:50,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:58:50,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:58:50,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:58:50,345 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2020-10-19 17:58:50,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:58:50,513 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-10-19 17:58:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 17:58:50,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-10-19 17:58:50,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:58:50,515 INFO L225 Difference]: With dead ends: 37 [2020-10-19 17:58:50,515 INFO L226 Difference]: Without dead ends: 37 [2020-10-19 17:58:50,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-19 17:58:50,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-19 17:58:50,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-19 17:58:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-19 17:58:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-19 17:58:50,522 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 13 [2020-10-19 17:58:50,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:58:50,523 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-19 17:58:50,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:58:50,523 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-19 17:58:50,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 17:58:50,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:58:50,524 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:58:50,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 17:58:50,525 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:58:50,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:58:50,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1143813903, now seen corresponding path program 1 times [2020-10-19 17:58:50,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:58:50,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438731078] [2020-10-19 17:58:50,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:58:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:50,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:58:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:50,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438731078] [2020-10-19 17:58:50,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145443515] [2020-10-19 17:58:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:58:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:50,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 17:58:50,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:58:50,798 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 17:58:50,798 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:58:50,807 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:58:50,807 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:58:50,808 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-19 17:58:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:50,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:58:50,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-10-19 17:58:50,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446247289] [2020-10-19 17:58:50,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 17:58:50,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:58:50,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 17:58:50,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-19 17:58:50,851 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-10-19 17:58:50,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:58:50,966 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-19 17:58:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 17:58:50,966 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-19 17:58:50,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:58:50,967 INFO L225 Difference]: With dead ends: 43 [2020-10-19 17:58:50,968 INFO L226 Difference]: Without dead ends: 43 [2020-10-19 17:58:50,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-19 17:58:50,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-19 17:58:50,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-19 17:58:50,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-19 17:58:50,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-19 17:58:50,974 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 14 [2020-10-19 17:58:50,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:58:50,974 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-19 17:58:50,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 17:58:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-19 17:58:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 17:58:50,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:58:50,976 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:58:51,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-19 17:58:51,187 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:58:51,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:58:51,187 INFO L82 PathProgramCache]: Analyzing trace with hash 228211982, now seen corresponding path program 1 times [2020-10-19 17:58:51,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:58:51,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514988804] [2020-10-19 17:58:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:58:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:51,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:58:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:51,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514988804] [2020-10-19 17:58:51,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:58:51,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-19 17:58:51,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652803132] [2020-10-19 17:58:51,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-19 17:58:51,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:58:51,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-19 17:58:51,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-19 17:58:51,395 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 9 states. [2020-10-19 17:58:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:58:51,603 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-10-19 17:58:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 17:58:51,604 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-19 17:58:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:58:51,605 INFO L225 Difference]: With dead ends: 44 [2020-10-19 17:58:51,605 INFO L226 Difference]: Without dead ends: 44 [2020-10-19 17:58:51,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-19 17:58:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-19 17:58:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-10-19 17:58:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-19 17:58:51,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-19 17:58:51,611 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 17 [2020-10-19 17:58:51,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:58:51,611 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-19 17:58:51,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-19 17:58:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-19 17:58:51,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 17:58:51,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:58:51,613 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:58:51,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 17:58:51,613 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:58:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:58:51,613 INFO L82 PathProgramCache]: Analyzing trace with hash 929276560, now seen corresponding path program 1 times [2020-10-19 17:58:51,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:58:51,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942904656] [2020-10-19 17:58:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:58:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:51,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:58:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:51,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942904656] [2020-10-19 17:58:51,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:58:51,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-19 17:58:51,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476490299] [2020-10-19 17:58:51,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-19 17:58:51,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:58:51,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 17:58:51,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-19 17:58:51,788 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 10 states. [2020-10-19 17:58:52,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:58:52,000 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-10-19 17:58:52,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 17:58:52,001 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-10-19 17:58:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:58:52,004 INFO L225 Difference]: With dead ends: 55 [2020-10-19 17:58:52,004 INFO L226 Difference]: Without dead ends: 55 [2020-10-19 17:58:52,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-10-19 17:58:52,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-19 17:58:52,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-19 17:58:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-19 17:58:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-19 17:58:52,009 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 17 [2020-10-19 17:58:52,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:58:52,010 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-19 17:58:52,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-19 17:58:52,010 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-19 17:58:52,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 17:58:52,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:58:52,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:58:52,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 17:58:52,011 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:58:52,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:58:52,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1516451273, now seen corresponding path program 1 times [2020-10-19 17:58:52,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:58:52,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847438814] [2020-10-19 17:58:52,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:58:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:52,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:58:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:52,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-19 17:58:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:52,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847438814] [2020-10-19 17:58:52,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 17:58:52,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 17:58:52,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481561444] [2020-10-19 17:58:52,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 17:58:52,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:58:52,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 17:58:52,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:58:52,074 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 5 states. [2020-10-19 17:58:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:58:52,147 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-10-19 17:58:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 17:58:52,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-19 17:58:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:58:52,149 INFO L225 Difference]: With dead ends: 41 [2020-10-19 17:58:52,149 INFO L226 Difference]: Without dead ends: 24 [2020-10-19 17:58:52,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 17:58:52,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-19 17:58:52,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-19 17:58:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-19 17:58:52,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-19 17:58:52,156 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-10-19 17:58:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:58:52,158 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-19 17:58:52,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 17:58:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-19 17:58:52,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 17:58:52,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:58:52,160 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:58:52,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 17:58:52,161 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:58:52,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:58:52,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1650962797, now seen corresponding path program 1 times [2020-10-19 17:58:52,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:58:52,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987023877] [2020-10-19 17:58:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:58:52,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:52,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:58:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:52,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987023877] [2020-10-19 17:58:52,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636445426] [2020-10-19 17:58:52,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:58:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:52,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-19 17:58:52,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:58:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:52,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:58:52,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-10-19 17:58:52,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548420669] [2020-10-19 17:58:52,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-19 17:58:52,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:58:52,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-19 17:58:52,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-19 17:58:52,491 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 15 states. [2020-10-19 17:58:52,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:58:52,713 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-10-19 17:58:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-19 17:58:52,714 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2020-10-19 17:58:52,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:58:52,715 INFO L225 Difference]: With dead ends: 31 [2020-10-19 17:58:52,715 INFO L226 Difference]: Without dead ends: 31 [2020-10-19 17:58:52,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-19 17:58:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-19 17:58:52,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2020-10-19 17:58:52,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-19 17:58:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-19 17:58:52,718 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 21 [2020-10-19 17:58:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:58:52,719 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-19 17:58:52,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-19 17:58:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-19 17:58:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-19 17:58:52,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:58:52,720 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:58:52,922 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:58:52,923 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:58:52,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:58:52,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1692198505, now seen corresponding path program 2 times [2020-10-19 17:58:52,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:58:52,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92211920] [2020-10-19 17:58:52,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:58:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:53,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:58:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:53,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92211920] [2020-10-19 17:58:53,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88900487] [2020-10-19 17:58:53,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:58:53,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 17:58:53,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:58:53,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 33 conjunts are in the unsatisfiable core [2020-10-19 17:58:53,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:58:53,331 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-10-19 17:58:53,331 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:58:53,343 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:58:53,345 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 17:58:53,346 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-10-19 17:58:53,701 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:58:53,701 INFO L384 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 18 treesize of output 18 [2020-10-19 17:58:53,702 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-19 17:58:53,715 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:58:53,718 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 17:58:53,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 17:58:53,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 17:58:53,729 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:58:53,730 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:31 [2020-10-19 17:58:53,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 17:58:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:53,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:58:53,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2020-10-19 17:58:53,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39574246] [2020-10-19 17:58:53,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-19 17:58:53,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:58:53,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-19 17:58:53,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-19 17:58:53,891 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 25 states. [2020-10-19 17:58:59,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:58:59,375 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2020-10-19 17:58:59,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-19 17:58:59,376 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2020-10-19 17:58:59,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:58:59,376 INFO L225 Difference]: With dead ends: 48 [2020-10-19 17:58:59,376 INFO L226 Difference]: Without dead ends: 39 [2020-10-19 17:58:59,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2020-10-19 17:58:59,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-19 17:58:59,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-10-19 17:58:59,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-19 17:58:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-19 17:58:59,381 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 25 [2020-10-19 17:58:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:58:59,381 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-19 17:58:59,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-19 17:58:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-19 17:58:59,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-19 17:58:59,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:58:59,382 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:58:59,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-19 17:58:59,584 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:58:59,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:58:59,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1867118562, now seen corresponding path program 3 times [2020-10-19 17:58:59,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:58:59,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511537795] [2020-10-19 17:58:59,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:58:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:59,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:58:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:58:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:58:59,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511537795] [2020-10-19 17:58:59,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527476643] [2020-10-19 17:58:59,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:58:59,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-19 17:58:59,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:58:59,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 37 conjunts are in the unsatisfiable core [2020-10-19 17:58:59,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:00,048 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-10-19 17:59:00,048 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:00,055 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:00,056 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 17:59:00,056 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-10-19 17:59:00,214 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-10-19 17:59:00,215 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:00,217 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:00,217 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:00,217 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-10-19 17:59:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:00,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:00,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 24 [2020-10-19 17:59:00,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875069631] [2020-10-19 17:59:00,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-19 17:59:00,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:00,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-19 17:59:00,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2020-10-19 17:59:00,223 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 24 states. [2020-10-19 17:59:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:00,871 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-10-19 17:59:00,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-19 17:59:00,872 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-10-19 17:59:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:00,873 INFO L225 Difference]: With dead ends: 54 [2020-10-19 17:59:00,873 INFO L226 Difference]: Without dead ends: 41 [2020-10-19 17:59:00,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2020-10-19 17:59:00,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-19 17:59:00,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-19 17:59:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-19 17:59:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-19 17:59:00,878 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2020-10-19 17:59:00,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:00,878 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-19 17:59:00,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-19 17:59:00,879 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-19 17:59:00,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-19 17:59:00,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:00,880 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:01,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:01,091 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:01,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:01,092 INFO L82 PathProgramCache]: Analyzing trace with hash 545438971, now seen corresponding path program 4 times [2020-10-19 17:59:01,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:01,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849640265] [2020-10-19 17:59:01,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:01,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:01,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849640265] [2020-10-19 17:59:01,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164114067] [2020-10-19 17:59:01,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:01,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 17:59:01,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:01,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 47 conjunts are in the unsatisfiable core [2020-10-19 17:59:01,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:01,455 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 17:59:01,456 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:01,461 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:01,462 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:01,462 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-19 17:59:01,526 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-10-19 17:59:01,527 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:01,534 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:01,534 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:01,534 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2020-10-19 17:59:01,856 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:01,857 INFO L384 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 19 treesize of output 19 [2020-10-19 17:59:01,857 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-19 17:59:01,868 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:01,868 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:01,869 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-10-19 17:59:01,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 17:59:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:02,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:02,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2020-10-19 17:59:02,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769079099] [2020-10-19 17:59:02,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-19 17:59:02,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:02,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-19 17:59:02,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=748, Unknown=0, NotChecked=0, Total=812 [2020-10-19 17:59:02,083 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 29 states. [2020-10-19 17:59:03,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:03,258 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-10-19 17:59:03,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-19 17:59:03,258 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 37 [2020-10-19 17:59:03,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:03,260 INFO L225 Difference]: With dead ends: 44 [2020-10-19 17:59:03,260 INFO L226 Difference]: Without dead ends: 44 [2020-10-19 17:59:03,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-10-19 17:59:03,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-19 17:59:03,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-19 17:59:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-19 17:59:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-19 17:59:03,269 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2020-10-19 17:59:03,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:03,270 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-19 17:59:03,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-19 17:59:03,270 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-19 17:59:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-19 17:59:03,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:03,271 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:03,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-19 17:59:03,472 INFO L429 AbstractCegarLoop]: === Iteration 15 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:03,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:03,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1989258789, now seen corresponding path program 5 times [2020-10-19 17:59:03,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:03,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917401892] [2020-10-19 17:59:03,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:03,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:03,820 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:03,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917401892] [2020-10-19 17:59:03,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875991365] [2020-10-19 17:59:03,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:03,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-19 17:59:03,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:03,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 56 conjunts are in the unsatisfiable core [2020-10-19 17:59:03,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:03,937 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 17:59:03,937 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:03,950 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:03,950 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:03,950 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-10-19 17:59:04,091 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-10-19 17:59:04,092 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:04,098 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:04,098 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:04,098 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-10-19 17:59:04,555 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:04,556 INFO L384 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 19 treesize of output 19 [2020-10-19 17:59:04,557 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-19 17:59:04,566 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:04,567 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:04,567 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:21 [2020-10-19 17:59:04,629 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 17:59:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:04,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:04,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2020-10-19 17:59:04,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036441566] [2020-10-19 17:59:04,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-19 17:59:04,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:04,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-19 17:59:04,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1186, Unknown=0, NotChecked=0, Total=1260 [2020-10-19 17:59:04,811 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 36 states. [2020-10-19 17:59:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:07,152 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2020-10-19 17:59:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-19 17:59:07,153 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 41 [2020-10-19 17:59:07,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:07,154 INFO L225 Difference]: With dead ends: 72 [2020-10-19 17:59:07,154 INFO L226 Difference]: Without dead ends: 55 [2020-10-19 17:59:07,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=293, Invalid=3997, Unknown=0, NotChecked=0, Total=4290 [2020-10-19 17:59:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-19 17:59:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2020-10-19 17:59:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-19 17:59:07,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-19 17:59:07,160 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 41 [2020-10-19 17:59:07,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:07,160 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-19 17:59:07,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-19 17:59:07,161 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-19 17:59:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-19 17:59:07,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 17:59:07,163 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 17:59:07,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:07,368 INFO L429 AbstractCegarLoop]: === Iteration 16 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, strlen_recErr1REQUIRES_VIOLATION, strlen_recErr0REQUIRES_VIOLATION]=== [2020-10-19 17:59:07,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 17:59:07,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1584706644, now seen corresponding path program 6 times [2020-10-19 17:59:07,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 17:59:07,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16204692] [2020-10-19 17:59:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 17:59:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:07,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 17:59:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 17:59:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 17:59:07,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16204692] [2020-10-19 17:59:07,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348175457] [2020-10-19 17:59:07,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 17:59:07,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-19 17:59:07,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 17:59:07,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 41 conjunts are in the unsatisfiable core [2020-10-19 17:59:07,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 17:59:07,973 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 17:59:07,974 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:07,978 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:07,979 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:07,979 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-19 17:59:08,017 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-10-19 17:59:08,018 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 17:59:08,025 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:08,027 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 17:59:08,027 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:19 [2020-10-19 17:59:08,272 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:08,272 INFO L384 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 20 treesize of output 20 [2020-10-19 17:59:08,273 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-10-19 17:59:08,285 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 17:59:08,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-19 17:59:08,289 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 17:59:08,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:27 [2020-10-19 17:59:08,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 17:59:08,518 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-19 17:59:08,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 17:59:08,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 30 [2020-10-19 17:59:08,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947329772] [2020-10-19 17:59:08,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-19 17:59:08,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 17:59:08,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-19 17:59:08,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2020-10-19 17:59:08,521 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 30 states. [2020-10-19 17:59:11,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 17:59:11,751 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-10-19 17:59:11,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-19 17:59:11,752 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 49 [2020-10-19 17:59:11,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 17:59:11,753 INFO L225 Difference]: With dead ends: 77 [2020-10-19 17:59:11,753 INFO L226 Difference]: Without dead ends: 0 [2020-10-19 17:59:11,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=452, Invalid=3838, Unknown=0, NotChecked=0, Total=4290 [2020-10-19 17:59:11,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-19 17:59:11,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-19 17:59:11,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-19 17:59:11,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-19 17:59:11,756 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2020-10-19 17:59:11,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 17:59:11,756 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 17:59:11,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-19 17:59:11,756 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-19 17:59:11,756 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-19 17:59:11,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-19 17:59:11,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 05:59:11 BoogieIcfgContainer [2020-10-19 17:59:11,963 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 17:59:11,963 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 17:59:11,964 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 17:59:11,964 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 17:59:11,964 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 05:58:48" (3/4) ... [2020-10-19 17:59:11,967 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-19 17:59:11,973 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2020-10-19 17:59:11,974 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2020-10-19 17:59:11,974 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2020-10-19 17:59:11,974 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2020-10-19 17:59:11,975 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2020-10-19 17:59:11,975 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2020-10-19 17:59:11,975 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure strlen_rec [2020-10-19 17:59:11,975 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2020-10-19 17:59:11,980 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-10-19 17:59:11,980 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-19 17:59:11,980 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-19 17:59:11,980 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-19 17:59:12,023 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 17:59:12,024 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 17:59:12,025 INFO L168 Benchmark]: Toolchain (without parser) took 24443.86 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 331.4 MB). Free memory was 960.0 MB in the beginning and 1.2 GB in the end (delta: -251.9 MB). Peak memory consumption was 79.4 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:12,026 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 17:59:12,027 INFO L168 Benchmark]: CACSL2BoogieTranslator took 616.34 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.1 MB). Free memory was 954.6 MB in the beginning and 1.1 GB in the end (delta: -135.9 MB). Peak memory consumption was 15.0 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:12,027 INFO L168 Benchmark]: Boogie Preprocessor took 117.31 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:12,028 INFO L168 Benchmark]: RCFGBuilder took 552.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 41.2 MB). Peak memory consumption was 41.2 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:12,028 INFO L168 Benchmark]: TraceAbstraction took 23086.86 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 220.2 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -180.4 MB). Peak memory consumption was 39.8 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:12,029 INFO L168 Benchmark]: Witness Printer took 60.41 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. [2020-10-19 17:59:12,031 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 616.34 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.1 MB). Free memory was 954.6 MB in the beginning and 1.1 GB in the end (delta: -135.9 MB). Peak memory consumption was 15.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 117.31 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. * RCFGBuilder took 552.88 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 41.2 MB). Peak memory consumption was 41.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 23086.86 ms. Allocated memory was 1.1 GB in the beginning and 1.4 GB in the end (delta: 220.2 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -180.4 MB). Peak memory consumption was 39.8 MB. Max. memory is 11.5 GB. * Witness Printer took 60.41 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 515]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 515]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23.0s, OverallIterations: 16, TraceHistogramMax: 6, AutomataDifference: 14.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 299 SDtfs, 652 SDslu, 1075 SDs, 0 SdLazy, 4383 SolverSat, 179 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 7.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 515 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 10.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=15, 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, 16 MinimizatonAttempts, 59 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 558 NumberOfCodeBlocks, 554 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 535 ConstructedInterpolants, 31 QuantifiedInterpolants, 147813 SizeOfPredicates, 72 NumberOfNonLiveVariables, 893 ConjunctsInSsa, 246 ConjunctsInUnsatCore, 23 InterpolantComputations, 9 PerfectInterpolantSequences, 126/396 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...