./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/openbsd_cstrcmp-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 f68b319d77fa756392ca29e618a1e0accd9b6c9e ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 16:36:16,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 16:36:16,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 16:36:16,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 16:36:16,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 16:36:16,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 16:36:16,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 16:36:16,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 16:36:16,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 16:36:16,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 16:36:16,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 16:36:16,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 16:36:16,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 16:36:16,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 16:36:16,176 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 16:36:16,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 16:36:16,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 16:36:16,181 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 16:36:16,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 16:36:16,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 16:36:16,190 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 16:36:16,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 16:36:16,193 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 16:36:16,194 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 16:36:16,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 16:36:16,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 16:36:16,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 16:36:16,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 16:36:16,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 16:36:16,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 16:36:16,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 16:36:16,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 16:36:16,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 16:36:16,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 16:36:16,212 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 16:36:16,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 16:36:16,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 16:36:16,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 16:36:16,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 16:36:16,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 16:36:16,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 16:36:16,217 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 16:36:16,252 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 16:36:16,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 16:36:16,254 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 16:36:16,254 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 16:36:16,256 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 16:36:16,256 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 16:36:16,256 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 16:36:16,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 16:36:16,257 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 16:36:16,257 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 16:36:16,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 16:36:16,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 16:36:16,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 16:36:16,258 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 16:36:16,259 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 16:36:16,259 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 16:36:16,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 16:36:16,259 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 16:36:16,259 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 16:36:16,260 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 16:36:16,260 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 16:36:16,260 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 16:36:16,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 16:36:16,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:36:16,261 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 16:36:16,261 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 16:36:16,261 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 16:36:16,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 16:36:16,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 16:36:16,261 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f68b319d77fa756392ca29e618a1e0accd9b6c9e [2021-08-30 16:36:16,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 16:36:16,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 16:36:16,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 16:36:16,602 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 16:36:16,602 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 16:36:16,603 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2021-08-30 16:36:16,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8890fd845/85b65dba71a0464dab07c97ec53f7973/FLAG9e5fb754a [2021-08-30 16:36:17,111 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 16:36:17,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2021-08-30 16:36:17,126 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8890fd845/85b65dba71a0464dab07c97ec53f7973/FLAG9e5fb754a [2021-08-30 16:36:17,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8890fd845/85b65dba71a0464dab07c97ec53f7973 [2021-08-30 16:36:17,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 16:36:17,150 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 16:36:17,153 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 16:36:17,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 16:36:17,158 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 16:36:17,159 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:36:17" (1/1) ... [2021-08-30 16:36:17,161 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44bd52b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:17, skipping insertion in model container [2021-08-30 16:36:17,161 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:36:17" (1/1) ... [2021-08-30 16:36:17,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 16:36:17,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 16:36:17,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:36:17,525 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 16:36:17,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:36:17,599 INFO L208 MainTranslator]: Completed translation [2021-08-30 16:36:17,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:17 WrapperNode [2021-08-30 16:36:17,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 16:36:17,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 16:36:17,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 16:36:17,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 16:36:17,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:17" (1/1) ... [2021-08-30 16:36:17,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:17" (1/1) ... [2021-08-30 16:36:17,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:17" (1/1) ... [2021-08-30 16:36:17,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:17" (1/1) ... [2021-08-30 16:36:17,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:17" (1/1) ... [2021-08-30 16:36:17,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:17" (1/1) ... [2021-08-30 16:36:17,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:17" (1/1) ... [2021-08-30 16:36:17,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 16:36:17,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 16:36:17,663 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 16:36:17,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 16:36:17,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:17" (1/1) ... [2021-08-30 16:36:17,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:36:17,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:17,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-30 16:36:17,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-30 16:36:17,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 16:36:17,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 16:36:17,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 16:36:17,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 16:36:17,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 16:36:17,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 16:36:17,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 16:36:17,725 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcmp [2021-08-30 16:36:17,726 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 16:36:17,726 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 16:36:17,726 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 16:36:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 16:36:17,728 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 16:36:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 16:36:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 16:36:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 16:36:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 16:36:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 16:36:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 16:36:17,729 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 16:36:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 16:36:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 16:36:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 16:36:17,730 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 16:36:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 16:36:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 16:36:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 16:36:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 16:36:17,732 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 16:36:17,732 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 16:36:17,732 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 16:36:17,732 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 16:36:17,732 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 16:36:17,733 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 16:36:17,733 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 16:36:17,733 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 16:36:17,733 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 16:36:17,733 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 16:36:17,733 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 16:36:17,733 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 16:36:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 16:36:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 16:36:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 16:36:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 16:36:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 16:36:17,734 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 16:36:17,735 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 16:36:17,735 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 16:36:17,735 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 16:36:17,735 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 16:36:17,736 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 16:36:17,736 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 16:36:17,737 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 16:36:17,737 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 16:36:17,737 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 16:36:17,737 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 16:36:17,737 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 16:36:17,737 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 16:36:17,738 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 16:36:17,738 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 16:36:17,738 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 16:36:17,738 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 16:36:17,738 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 16:36:17,738 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 16:36:17,738 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 16:36:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 16:36:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 16:36:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 16:36:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 16:36:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 16:36:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 16:36:17,739 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 16:36:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 16:36:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 16:36:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 16:36:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 16:36:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 16:36:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 16:36:17,740 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 16:36:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 16:36:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 16:36:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 16:36:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 16:36:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 16:36:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 16:36:17,741 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 16:36:17,742 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 16:36:17,742 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 16:36:17,742 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 16:36:17,742 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 16:36:17,742 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 16:36:17,742 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 16:36:17,742 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 16:36:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 16:36:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 16:36:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 16:36:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 16:36:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 16:36:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 16:36:17,743 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 16:36:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 16:36:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 16:36:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 16:36:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 16:36:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 16:36:17,744 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 16:36:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 16:36:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 16:36:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 16:36:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 16:36:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 16:36:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 16:36:17,745 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 16:36:17,746 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 16:36:17,746 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 16:36:17,746 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 16:36:17,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 16:36:17,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-30 16:36:17,746 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcmp [2021-08-30 16:36:17,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 16:36:17,747 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 16:36:17,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 16:36:17,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 16:36:17,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 16:36:17,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 16:36:17,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 16:36:18,102 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 16:36:18,102 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-30 16:36:18,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:36:18 BoogieIcfgContainer [2021-08-30 16:36:18,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 16:36:18,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 16:36:18,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 16:36:18,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 16:36:18,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:36:17" (1/3) ... [2021-08-30 16:36:18,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f84d14a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:36:18, skipping insertion in model container [2021-08-30 16:36:18,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:36:17" (2/3) ... [2021-08-30 16:36:18,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f84d14a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:36:18, skipping insertion in model container [2021-08-30 16:36:18,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:36:18" (3/3) ... [2021-08-30 16:36:18,118 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2021-08-30 16:36:18,130 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 16:36:18,130 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-08-30 16:36:18,177 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 16:36:18,186 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-30 16:36:18,186 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-08-30 16:36:18,202 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 32 states have (on average 1.875) internal successors, (60), 51 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 16:36:18,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:36:18,221 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:18,222 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:18,222 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:18,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:18,227 INFO L82 PathProgramCache]: Analyzing trace with hash -568922052, now seen corresponding path program 1 times [2021-08-30 16:36:18,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:18,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82026918] [2021-08-30 16:36:18,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:18,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:18,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:18,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:18,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82026918] [2021-08-30 16:36:18,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82026918] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:18,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:18,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:36:18,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618173444] [2021-08-30 16:36:18,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:36:18,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:18,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:36:18,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:36:18,541 INFO L87 Difference]: Start difference. First operand has 58 states, 32 states have (on average 1.875) internal successors, (60), 51 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:18,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:18,738 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-08-30 16:36:18,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:36:18,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-30 16:36:18,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:18,746 INFO L225 Difference]: With dead ends: 56 [2021-08-30 16:36:18,754 INFO L226 Difference]: Without dead ends: 53 [2021-08-30 16:36:18,757 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.10ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:36:18,760 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.14ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.21ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:18,761 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 9 Invalid, 124 Unknown, 0 Unchecked, 5.14ms Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 160.21ms Time] [2021-08-30 16:36:18,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-30 16:36:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-08-30 16:36:18,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 47 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2021-08-30 16:36:18,797 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 11 [2021-08-30 16:36:18,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:18,797 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2021-08-30 16:36:18,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:18,798 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2021-08-30 16:36:18,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:36:18,799 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:18,799 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:18,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 16:36:18,800 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:18,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:18,802 INFO L82 PathProgramCache]: Analyzing trace with hash -568922051, now seen corresponding path program 1 times [2021-08-30 16:36:18,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:18,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061934189] [2021-08-30 16:36:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:18,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:18,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:18,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:18,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061934189] [2021-08-30 16:36:18,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061934189] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:18,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:18,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:36:18,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468854655] [2021-08-30 16:36:18,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:36:18,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:18,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:36:18,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:36:18,943 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:19,131 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-08-30 16:36:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:36:19,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-30 16:36:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:19,136 INFO L225 Difference]: With dead ends: 73 [2021-08-30 16:36:19,136 INFO L226 Difference]: Without dead ends: 73 [2021-08-30 16:36:19,137 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.55ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:36:19,141 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.81ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.93ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:19,142 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 15 Invalid, 190 Unknown, 0 Unchecked, 4.81ms Time], IncrementalHoareTripleChecker [3 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 148.93ms Time] [2021-08-30 16:36:19,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-30 16:36:19,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2021-08-30 16:36:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.696969696969697) internal successors, (56), 49 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:19,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-08-30 16:36:19,160 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 11 [2021-08-30 16:36:19,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:19,160 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-08-30 16:36:19,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:19,161 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-08-30 16:36:19,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:36:19,162 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:19,162 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:19,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 16:36:19,163 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:19,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:19,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1273294668, now seen corresponding path program 1 times [2021-08-30 16:36:19,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:19,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523053060] [2021-08-30 16:36:19,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:19,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:19,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:19,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:19,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523053060] [2021-08-30 16:36:19,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523053060] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:19,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:19,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:36:19,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172844177] [2021-08-30 16:36:19,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:36:19,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:19,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:36:19,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:36:19,267 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:19,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:19,372 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-08-30 16:36:19,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:36:19,373 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-30 16:36:19,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:19,375 INFO L225 Difference]: With dead ends: 54 [2021-08-30 16:36:19,377 INFO L226 Difference]: Without dead ends: 54 [2021-08-30 16:36:19,377 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.18ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:36:19,382 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.76ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.83ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:19,384 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 10 Invalid, 112 Unknown, 0 Unchecked, 1.76ms Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 83.83ms Time] [2021-08-30 16:36:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-30 16:36:19,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-30 16:36:19,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 48 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-08-30 16:36:19,392 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 13 [2021-08-30 16:36:19,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:19,393 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-08-30 16:36:19,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:19,393 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-08-30 16:36:19,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:36:19,394 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:19,394 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:19,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 16:36:19,394 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr2REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:19,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:19,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1273294616, now seen corresponding path program 1 times [2021-08-30 16:36:19,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:19,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980836838] [2021-08-30 16:36:19,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:19,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:19,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:19,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:19,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980836838] [2021-08-30 16:36:19,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980836838] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:19,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:19,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:36:19,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859212726] [2021-08-30 16:36:19,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:36:19,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:19,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:36:19,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:36:19,454 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:19,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:19,569 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-08-30 16:36:19,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:36:19,569 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-30 16:36:19,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:19,570 INFO L225 Difference]: With dead ends: 72 [2021-08-30 16:36:19,570 INFO L226 Difference]: Without dead ends: 72 [2021-08-30 16:36:19,571 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.15ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:36:19,571 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.69ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.95ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:19,572 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 12 Invalid, 144 Unknown, 0 Unchecked, 1.69ms Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 96.95ms Time] [2021-08-30 16:36:19,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-30 16:36:19,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2021-08-30 16:36:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 57 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:19,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-08-30 16:36:19,577 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 13 [2021-08-30 16:36:19,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:19,577 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-08-30 16:36:19,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:19,578 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-08-30 16:36:19,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:36:19,578 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:19,578 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:19,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 16:36:19,579 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:19,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1216036314, now seen corresponding path program 1 times [2021-08-30 16:36:19,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:19,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871585201] [2021-08-30 16:36:19,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:19,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:19,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:19,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:19,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871585201] [2021-08-30 16:36:19,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871585201] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:19,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:19,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:36:19,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167152867] [2021-08-30 16:36:19,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:36:19,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:19,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:36:19,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:36:19,611 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:19,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:19,680 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-08-30 16:36:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:36:19,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-30 16:36:19,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:19,682 INFO L225 Difference]: With dead ends: 61 [2021-08-30 16:36:19,682 INFO L226 Difference]: Without dead ends: 61 [2021-08-30 16:36:19,682 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.86ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:36:19,683 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.08ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.12ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:19,683 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 8 Invalid, 110 Unknown, 0 Unchecked, 1.08ms Time], IncrementalHoareTripleChecker [3 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 65.12ms Time] [2021-08-30 16:36:19,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-30 16:36:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-08-30 16:36:19,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 55 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:19,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-08-30 16:36:19,687 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2021-08-30 16:36:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:19,687 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-08-30 16:36:19,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-08-30 16:36:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-30 16:36:19,688 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:19,688 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:19,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-30 16:36:19,689 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:19,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:19,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1216036313, now seen corresponding path program 1 times [2021-08-30 16:36:19,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:19,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961896111] [2021-08-30 16:36:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:19,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:19,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:19,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:19,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:19,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961896111] [2021-08-30 16:36:19,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961896111] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:19,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:19,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:36:19,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081410842] [2021-08-30 16:36:19,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 16:36:19,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:19,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 16:36:19,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:36:19,758 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:19,918 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-08-30 16:36:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:36:19,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-30 16:36:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:19,920 INFO L225 Difference]: With dead ends: 72 [2021-08-30 16:36:19,921 INFO L226 Difference]: Without dead ends: 72 [2021-08-30 16:36:19,921 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.00ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:36:19,923 INFO L928 BasicCegarLoop]: 6 mSDtfsCounter, 66 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 110.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.42ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.98ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:19,925 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 13 Invalid, 182 Unknown, 0 Unchecked, 2.42ms Time], IncrementalHoareTripleChecker [5 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 136.98ms Time] [2021-08-30 16:36:19,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-30 16:36:19,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2021-08-30 16:36:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 57 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-08-30 16:36:19,939 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 13 [2021-08-30 16:36:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:19,940 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-08-30 16:36:19,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-08-30 16:36:19,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-30 16:36:19,941 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:19,941 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:19,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-30 16:36:19,941 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr7REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:19,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:19,945 INFO L82 PathProgramCache]: Analyzing trace with hash -817429008, now seen corresponding path program 1 times [2021-08-30 16:36:19,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:19,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937175362] [2021-08-30 16:36:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:19,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:20,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:20,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:20,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937175362] [2021-08-30 16:36:20,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937175362] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:20,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:20,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:36:20,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021216412] [2021-08-30 16:36:20,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:36:20,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:20,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:36:20,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:36:20,019 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:20,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:20,112 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-08-30 16:36:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:36:20,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-30 16:36:20,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:20,113 INFO L225 Difference]: With dead ends: 62 [2021-08-30 16:36:20,113 INFO L226 Difference]: Without dead ends: 62 [2021-08-30 16:36:20,114 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.11ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:36:20,114 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.83ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.05ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:20,115 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 13 Invalid, 135 Unknown, 0 Unchecked, 0.83ms Time], IncrementalHoareTripleChecker [4 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 82.05ms Time] [2021-08-30 16:36:20,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-30 16:36:20,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-30 16:36:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 56 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-08-30 16:36:20,118 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 14 [2021-08-30 16:36:20,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:20,118 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-08-30 16:36:20,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:20,118 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-08-30 16:36:20,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 16:36:20,119 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:20,119 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:20,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-30 16:36:20,119 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:20,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:20,120 INFO L82 PathProgramCache]: Analyzing trace with hash 478071552, now seen corresponding path program 1 times [2021-08-30 16:36:20,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:20,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097315380] [2021-08-30 16:36:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:20,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:20,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:20,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:20,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097315380] [2021-08-30 16:36:20,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097315380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:20,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025232228] [2021-08-30 16:36:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:20,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:20,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:20,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:20,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 16:36:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:20,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-30 16:36:20,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:20,371 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 16:36:20,372 INFO L388 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-30 16:36:20,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:36:20,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:20,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:20,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025232228] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:20,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:20,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-08-30 16:36:20,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131970106] [2021-08-30 16:36:20,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-30 16:36:20,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:20,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-30 16:36:20,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:36:20,740 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:21,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:21,031 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2021-08-30 16:36:21,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:36:21,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-30 16:36:21,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:21,033 INFO L225 Difference]: With dead ends: 99 [2021-08-30 16:36:21,033 INFO L226 Difference]: Without dead ends: 99 [2021-08-30 16:36:21,033 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 125.24ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-30 16:36:21,034 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 92 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 183.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.02ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 221.40ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:21,034 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 25 Invalid, 420 Unknown, 0 Unchecked, 3.02ms Time], IncrementalHoareTripleChecker [13 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 221.40ms Time] [2021-08-30 16:36:21,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-30 16:36:21,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 57. [2021-08-30 16:36:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.475) internal successors, (59), 51 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:21,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-08-30 16:36:21,042 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 15 [2021-08-30 16:36:21,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:21,043 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-08-30 16:36:21,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:21,043 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-08-30 16:36:21,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 16:36:21,045 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:21,046 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:21,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-30 16:36:21,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:21,264 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrcmpErr0REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:21,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:21,264 INFO L82 PathProgramCache]: Analyzing trace with hash 437037254, now seen corresponding path program 1 times [2021-08-30 16:36:21,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:21,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471714512] [2021-08-30 16:36:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:21,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:21,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:21,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:21,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471714512] [2021-08-30 16:36:21,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471714512] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:21,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:21,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:36:21,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023124992] [2021-08-30 16:36:21,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 16:36:21,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:21,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 16:36:21,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:36:21,302 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:21,392 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-08-30 16:36:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:36:21,392 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-30 16:36:21,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:21,393 INFO L225 Difference]: With dead ends: 55 [2021-08-30 16:36:21,393 INFO L226 Difference]: Without dead ends: 55 [2021-08-30 16:36:21,393 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.34ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:36:21,395 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 79 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.81ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.57ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:21,396 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 14 Invalid, 157 Unknown, 0 Unchecked, 0.81ms Time], IncrementalHoareTripleChecker [7 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 71.57ms Time] [2021-08-30 16:36:21,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-30 16:36:21,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-08-30 16:36:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.425) internal successors, (57), 49 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-08-30 16:36:21,406 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 17 [2021-08-30 16:36:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:21,406 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-08-30 16:36:21,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-08-30 16:36:21,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 16:36:21,408 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:21,409 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:21,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-30 16:36:21,409 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:21,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:21,409 INFO L82 PathProgramCache]: Analyzing trace with hash 437037255, now seen corresponding path program 1 times [2021-08-30 16:36:21,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:21,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178169077] [2021-08-30 16:36:21,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:21,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:21,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:21,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:21,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:21,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178169077] [2021-08-30 16:36:21,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178169077] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:21,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:21,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 16:36:21,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570113595] [2021-08-30 16:36:21,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 16:36:21,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:21,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 16:36:21,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:36:21,501 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:21,685 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-08-30 16:36:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 16:36:21,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-30 16:36:21,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:21,687 INFO L225 Difference]: With dead ends: 69 [2021-08-30 16:36:21,687 INFO L226 Difference]: Without dead ends: 69 [2021-08-30 16:36:21,688 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 73.27ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-30 16:36:21,688 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 117 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.03ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.50ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:21,688 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 22 Invalid, 241 Unknown, 0 Unchecked, 2.03ms Time], IncrementalHoareTripleChecker [10 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 137.50ms Time] [2021-08-30 16:36:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-30 16:36:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-08-30 16:36:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 54 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-08-30 16:36:21,691 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 17 [2021-08-30 16:36:21,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:21,691 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-08-30 16:36:21,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-08-30 16:36:21,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 16:36:21,692 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:21,692 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:21,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 16:36:21,692 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:21,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:21,692 INFO L82 PathProgramCache]: Analyzing trace with hash 92671082, now seen corresponding path program 1 times [2021-08-30 16:36:21,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:21,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629520640] [2021-08-30 16:36:21,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:21,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:21,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:21,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:21,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629520640] [2021-08-30 16:36:21,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629520640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:21,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963383445] [2021-08-30 16:36:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:21,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:21,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:21,762 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:21,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 16:36:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:21,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-30 16:36:21,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:21,908 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:36:21,908 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 16:36:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:22,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:22,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:22,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963383445] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:22,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:22,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-08-30 16:36:22,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950992554] [2021-08-30 16:36:22,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 16:36:22,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:22,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 16:36:22,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-30 16:36:22,254 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:22,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:22,471 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-08-30 16:36:22,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 16:36:22,472 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-30 16:36:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:22,473 INFO L225 Difference]: With dead ends: 74 [2021-08-30 16:36:22,473 INFO L226 Difference]: Without dead ends: 74 [2021-08-30 16:36:22,473 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 160.21ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-08-30 16:36:22,474 INFO L928 BasicCegarLoop]: 9 mSDtfsCounter, 104 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 156.39ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:22,474 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 19 Invalid, 273 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [23 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 156.39ms Time] [2021-08-30 16:36:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-30 16:36:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 57. [2021-08-30 16:36:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 51 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:22,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-08-30 16:36:22,477 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 17 [2021-08-30 16:36:22,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:22,477 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-08-30 16:36:22,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:22,477 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-08-30 16:36:22,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-30 16:36:22,478 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:22,478 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:22,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-30 16:36:22,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-30 16:36:22,689 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrcmpErr2REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:22,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:22,689 INFO L82 PathProgramCache]: Analyzing trace with hash -913994489, now seen corresponding path program 1 times [2021-08-30 16:36:22,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:22,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888180570] [2021-08-30 16:36:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:22,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:22,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:22,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:22,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888180570] [2021-08-30 16:36:22,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888180570] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:22,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:22,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 16:36:22,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358852595] [2021-08-30 16:36:22,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 16:36:22,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:22,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 16:36:22,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:36:22,746 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:22,874 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-08-30 16:36:22,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 16:36:22,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-30 16:36:22,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:22,875 INFO L225 Difference]: With dead ends: 56 [2021-08-30 16:36:22,875 INFO L226 Difference]: Without dead ends: 56 [2021-08-30 16:36:22,875 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.78ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:36:22,876 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 74 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.71ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:22,876 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 17 Invalid, 196 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [9 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 94.71ms Time] [2021-08-30 16:36:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-30 16:36:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-08-30 16:36:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.372093023255814) internal successors, (59), 50 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-08-30 16:36:22,879 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 19 [2021-08-30 16:36:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:22,879 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-08-30 16:36:22,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-08-30 16:36:22,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-30 16:36:22,880 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:22,880 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:22,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-30 16:36:22,880 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:22,881 INFO L82 PathProgramCache]: Analyzing trace with hash -913994488, now seen corresponding path program 1 times [2021-08-30 16:36:22,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:22,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138665735] [2021-08-30 16:36:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:22,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:22,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:22,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:22,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138665735] [2021-08-30 16:36:22,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138665735] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:22,956 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:22,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 16:36:22,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553887190] [2021-08-30 16:36:22,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 16:36:22,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:22,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 16:36:22,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-08-30 16:36:22,957 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:23,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:23,130 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-08-30 16:36:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:36:23,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-30 16:36:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:23,131 INFO L225 Difference]: With dead ends: 56 [2021-08-30 16:36:23,131 INFO L226 Difference]: Without dead ends: 56 [2021-08-30 16:36:23,131 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 85.94ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-30 16:36:23,132 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 96 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 117.15ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:23,132 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 21 Invalid, 246 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [10 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 117.15ms Time] [2021-08-30 16:36:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-30 16:36:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-08-30 16:36:23,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 50 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-08-30 16:36:23,134 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 19 [2021-08-30 16:36:23,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:23,134 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-08-30 16:36:23,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-08-30 16:36:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 16:36:23,135 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:23,135 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:23,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-30 16:36:23,135 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrcmpErr4REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:23,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:23,135 INFO L82 PathProgramCache]: Analyzing trace with hash 2119591432, now seen corresponding path program 1 times [2021-08-30 16:36:23,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:23,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507455597] [2021-08-30 16:36:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:23,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:23,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:23,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:23,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:23,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507455597] [2021-08-30 16:36:23,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507455597] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:23,198 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:23,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 16:36:23,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893537605] [2021-08-30 16:36:23,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 16:36:23,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:23,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 16:36:23,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:36:23,200 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:23,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:23,322 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-08-30 16:36:23,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 16:36:23,322 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-30 16:36:23,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:23,323 INFO L225 Difference]: With dead ends: 55 [2021-08-30 16:36:23,324 INFO L226 Difference]: Without dead ends: 55 [2021-08-30 16:36:23,324 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.46ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:36:23,324 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 71 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.50ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:23,324 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 17 Invalid, 190 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [6 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 90.50ms Time] [2021-08-30 16:36:23,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-30 16:36:23,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-08-30 16:36:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 49 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-08-30 16:36:23,326 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 21 [2021-08-30 16:36:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:23,328 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-08-30 16:36:23,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:23,328 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-08-30 16:36:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 16:36:23,329 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:23,329 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:23,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-30 16:36:23,330 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:23,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2119591433, now seen corresponding path program 1 times [2021-08-30 16:36:23,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:23,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696131405] [2021-08-30 16:36:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:23,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:23,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:23,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:23,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696131405] [2021-08-30 16:36:23,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696131405] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:23,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:23,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-30 16:36:23,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084139380] [2021-08-30 16:36:23,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-30 16:36:23,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:23,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-30 16:36:23,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:36:23,410 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:23,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:23,572 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-08-30 16:36:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:36:23,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-08-30 16:36:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:23,573 INFO L225 Difference]: With dead ends: 64 [2021-08-30 16:36:23,573 INFO L226 Difference]: Without dead ends: 64 [2021-08-30 16:36:23,574 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 64.80ms TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-08-30 16:36:23,574 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 101 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.91ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.34ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:23,574 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 20 Invalid, 214 Unknown, 0 Unchecked, 1.91ms Time], IncrementalHoareTripleChecker [4 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 118.34ms Time] [2021-08-30 16:36:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-30 16:36:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-08-30 16:36:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 50 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-08-30 16:36:23,576 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 21 [2021-08-30 16:36:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:23,577 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-08-30 16:36:23,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:23,577 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-08-30 16:36:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 16:36:23,577 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:23,577 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:23,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-30 16:36:23,577 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrcmpErr8REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:23,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:23,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1112818005, now seen corresponding path program 1 times [2021-08-30 16:36:23,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:23,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050420208] [2021-08-30 16:36:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:23,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:23,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:23,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:23,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050420208] [2021-08-30 16:36:23,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050420208] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:23,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:23,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 16:36:23,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710564949] [2021-08-30 16:36:23,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 16:36:23,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:23,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 16:36:23,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:36:23,624 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:23,738 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-08-30 16:36:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 16:36:23,739 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-08-30 16:36:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:23,739 INFO L225 Difference]: With dead ends: 55 [2021-08-30 16:36:23,744 INFO L226 Difference]: Without dead ends: 55 [2021-08-30 16:36:23,744 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.35ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-30 16:36:23,745 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 65 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.00ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.27ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:23,745 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 17 Invalid, 189 Unknown, 0 Unchecked, 1.00ms Time], IncrementalHoareTripleChecker [8 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 84.27ms Time] [2021-08-30 16:36:23,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-30 16:36:23,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-08-30 16:36:23,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 49 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:23,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-08-30 16:36:23,747 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 23 [2021-08-30 16:36:23,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:23,747 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-08-30 16:36:23,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:23,747 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-08-30 16:36:23,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 16:36:23,748 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:23,748 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:23,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-30 16:36:23,748 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrcmpErr9REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:23,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:23,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1112818006, now seen corresponding path program 1 times [2021-08-30 16:36:23,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:23,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844785324] [2021-08-30 16:36:23,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:23,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:23,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:23,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:23,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844785324] [2021-08-30 16:36:23,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844785324] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:23,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:23,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-30 16:36:23,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900503326] [2021-08-30 16:36:23,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-30 16:36:23,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:23,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-30 16:36:23,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-08-30 16:36:23,836 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:24,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:24,084 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-08-30 16:36:24,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-30 16:36:24,084 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-08-30 16:36:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:24,085 INFO L225 Difference]: With dead ends: 63 [2021-08-30 16:36:24,085 INFO L226 Difference]: Without dead ends: 63 [2021-08-30 16:36:24,085 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 117.71ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-30 16:36:24,085 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 86 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 129.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.12ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 156.56ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:24,086 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 28 Invalid, 300 Unknown, 0 Unchecked, 2.12ms Time], IncrementalHoareTripleChecker [9 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 156.56ms Time] [2021-08-30 16:36:24,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-30 16:36:24,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-08-30 16:36:24,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 51 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:24,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-08-30 16:36:24,088 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 23 [2021-08-30 16:36:24,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:24,088 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-08-30 16:36:24,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-08-30 16:36:24,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-30 16:36:24,088 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:24,089 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:24,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-30 16:36:24,089 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:24,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1112867735, now seen corresponding path program 1 times [2021-08-30 16:36:24,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:24,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020961395] [2021-08-30 16:36:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:24,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:24,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:24,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:24,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:24,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020961395] [2021-08-30 16:36:24,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020961395] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:24,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:24,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-30 16:36:24,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646786735] [2021-08-30 16:36:24,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-30 16:36:24,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:24,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-30 16:36:24,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-30 16:36:24,237 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:24,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:24,520 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2021-08-30 16:36:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-30 16:36:24,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-08-30 16:36:24,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:24,521 INFO L225 Difference]: With dead ends: 93 [2021-08-30 16:36:24,521 INFO L226 Difference]: Without dead ends: 93 [2021-08-30 16:36:24,521 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 118.55ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-30 16:36:24,521 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 90 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 171.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.31ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 214.01ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:24,522 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 35 Invalid, 391 Unknown, 0 Unchecked, 2.31ms Time], IncrementalHoareTripleChecker [13 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 214.01ms Time] [2021-08-30 16:36:24,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-30 16:36:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2021-08-30 16:36:24,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 75 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-30 16:36:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2021-08-30 16:36:24,524 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 23 [2021-08-30 16:36:24,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:24,524 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2021-08-30 16:36:24,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2021-08-30 16:36:24,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-30 16:36:24,525 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:24,525 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:24,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-30 16:36:24,525 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:24,525 INFO L82 PathProgramCache]: Analyzing trace with hash 590156061, now seen corresponding path program 1 times [2021-08-30 16:36:24,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:24,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889498884] [2021-08-30 16:36:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:24,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:24,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:24,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-30 16:36:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:24,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:24,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889498884] [2021-08-30 16:36:24,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889498884] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:24,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:24,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:36:24,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304689229] [2021-08-30 16:36:24,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:36:24,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:24,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:36:24,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:36:24,570 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:24,621 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-08-30 16:36:24,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:36:24,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-08-30 16:36:24,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:24,622 INFO L225 Difference]: With dead ends: 81 [2021-08-30 16:36:24,622 INFO L226 Difference]: Without dead ends: 50 [2021-08-30 16:36:24,622 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.81ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:36:24,622 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 53 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.51ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.43ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:24,622 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 6 Invalid, 94 Unknown, 0 Unchecked, 0.51ms Time], IncrementalHoareTripleChecker [5 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 48.43ms Time] [2021-08-30 16:36:24,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-30 16:36:24,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-08-30 16:36:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:24,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-08-30 16:36:24,624 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 26 [2021-08-30 16:36:24,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:24,625 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-08-30 16:36:24,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:36:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-08-30 16:36:24,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-30 16:36:24,625 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:24,626 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:24,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-30 16:36:24,626 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:24,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:24,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1603523034, now seen corresponding path program 1 times [2021-08-30 16:36:24,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:24,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115333259] [2021-08-30 16:36:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:24,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:24,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:24,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:24,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115333259] [2021-08-30 16:36:24,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115333259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:24,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47007270] [2021-08-30 16:36:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:24,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:24,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:24,738 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:24,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 16:36:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:24,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-30 16:36:24,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:24,873 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 16:36:24,873 INFO L388 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-30 16:36:24,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:36:25,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:25,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:25,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47007270] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:25,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:25,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2021-08-30 16:36:25,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953202290] [2021-08-30 16:36:25,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-30 16:36:25,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:25,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-30 16:36:25,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-30 16:36:25,332 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 19 states have internal predecessors, (60), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:25,722 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-08-30 16:36:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 16:36:25,722 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 19 states have internal predecessors, (60), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-08-30 16:36:25,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:25,722 INFO L225 Difference]: With dead ends: 65 [2021-08-30 16:36:25,723 INFO L226 Difference]: Without dead ends: 65 [2021-08-30 16:36:25,723 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 389.29ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-08-30 16:36:25,723 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 205 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 175.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.23ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 214.31ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:25,724 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 40 Invalid, 441 Unknown, 0 Unchecked, 3.23ms Time], IncrementalHoareTripleChecker [31 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 214.31ms Time] [2021-08-30 16:36:25,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-30 16:36:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-08-30 16:36:25,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 46 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-08-30 16:36:25,726 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 27 [2021-08-30 16:36:25,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:25,726 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-08-30 16:36:25,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 19 states have internal predecessors, (60), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:25,726 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-08-30 16:36:25,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 16:36:25,727 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:25,727 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:25,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:25,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:25,929 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:25,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:25,929 INFO L82 PathProgramCache]: Analyzing trace with hash -907625125, now seen corresponding path program 1 times [2021-08-30 16:36:25,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:25,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744513048] [2021-08-30 16:36:25,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:25,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:26,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:36:26,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:26,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744513048] [2021-08-30 16:36:26,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744513048] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:26,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:26,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-08-30 16:36:26,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564303231] [2021-08-30 16:36:26,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-30 16:36:26,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:26,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-30 16:36:26,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-08-30 16:36:26,081 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:26,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:26,343 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2021-08-30 16:36:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 16:36:26,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-08-30 16:36:26,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:26,344 INFO L225 Difference]: With dead ends: 61 [2021-08-30 16:36:26,344 INFO L226 Difference]: Without dead ends: 43 [2021-08-30 16:36:26,344 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 171.42ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-08-30 16:36:26,345 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 40 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.05ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 154.13ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:26,345 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 31 Invalid, 346 Unknown, 0 Unchecked, 2.05ms Time], IncrementalHoareTripleChecker [8 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 154.13ms Time] [2021-08-30 16:36:26,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-30 16:36:26,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-08-30 16:36:26,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:26,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-08-30 16:36:26,347 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 29 [2021-08-30 16:36:26,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:26,347 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-08-30 16:36:26,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:26,348 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-08-30 16:36:26,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-30 16:36:26,348 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:26,348 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:26,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-30 16:36:26,348 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:26,349 INFO L82 PathProgramCache]: Analyzing trace with hash -688770407, now seen corresponding path program 1 times [2021-08-30 16:36:26,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:26,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466010111] [2021-08-30 16:36:26,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:26,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:26,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:26,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:36:26,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:26,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466010111] [2021-08-30 16:36:26,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466010111] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:26,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:36:26,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-08-30 16:36:26,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047687480] [2021-08-30 16:36:26,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-30 16:36:26,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:26,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-30 16:36:26,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-08-30 16:36:26,543 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:26,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:26,813 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-08-30 16:36:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-30 16:36:26,815 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-08-30 16:36:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:26,815 INFO L225 Difference]: With dead ends: 57 [2021-08-30 16:36:26,816 INFO L226 Difference]: Without dead ends: 47 [2021-08-30 16:36:26,816 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 189.10ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-30 16:36:26,817 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 68 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.06ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.89ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:26,817 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 34 Invalid, 386 Unknown, 0 Unchecked, 2.06ms Time], IncrementalHoareTripleChecker [10 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 166.89ms Time] [2021-08-30 16:36:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-30 16:36:26,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-08-30 16:36:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 39 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-08-30 16:36:26,818 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 29 [2021-08-30 16:36:26,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:26,819 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-08-30 16:36:26,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:26,819 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-08-30 16:36:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-30 16:36:26,819 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:26,819 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:26,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-30 16:36:26,819 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:26,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:26,820 INFO L82 PathProgramCache]: Analyzing trace with hash -196593956, now seen corresponding path program 1 times [2021-08-30 16:36:26,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:26,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336563750] [2021-08-30 16:36:26,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:26,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:26,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:36:26,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:26,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336563750] [2021-08-30 16:36:26,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336563750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:26,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114120616] [2021-08-30 16:36:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:26,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:26,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:26,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:26,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 16:36:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:27,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-30 16:36:27,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:36:27,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:27,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:36:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:36:27,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114120616] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:27,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:27,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2021-08-30 16:36:27,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576007041] [2021-08-30 16:36:27,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-30 16:36:27,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:27,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-30 16:36:27,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-08-30 16:36:27,471 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 25 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:27,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:27,835 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-08-30 16:36:27,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 16:36:27,835 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-08-30 16:36:27,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:27,836 INFO L225 Difference]: With dead ends: 50 [2021-08-30 16:36:27,836 INFO L226 Difference]: Without dead ends: 50 [2021-08-30 16:36:27,837 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 379.66ms TimeCoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-08-30 16:36:27,837 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 105 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.26ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 221.55ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:27,837 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 49 Invalid, 538 Unknown, 0 Unchecked, 3.26ms Time], IncrementalHoareTripleChecker [19 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 221.55ms Time] [2021-08-30 16:36:27,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-30 16:36:27,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-08-30 16:36:27,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:27,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-08-30 16:36:27,839 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 33 [2021-08-30 16:36:27,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:27,840 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-08-30 16:36:27,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 21 states have internal predecessors, (59), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:27,840 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-08-30 16:36:27,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-30 16:36:27,840 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:27,840 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:27,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:28,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:28,045 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:28,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:28,045 INFO L82 PathProgramCache]: Analyzing trace with hash 51768029, now seen corresponding path program 1 times [2021-08-30 16:36:28,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:28,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873620632] [2021-08-30 16:36:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:28,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:36:28,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:28,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873620632] [2021-08-30 16:36:28,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873620632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:28,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010106185] [2021-08-30 16:36:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:28,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:28,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:28,174 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:28,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-30 16:36:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:28,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-30 16:36:28,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:36:28,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:28,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:36:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:36:28,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010106185] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:28,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:28,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2021-08-30 16:36:28,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730871874] [2021-08-30 16:36:28,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-30 16:36:28,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:28,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-30 16:36:28,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-30 16:36:28,712 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 20 states have internal predecessors, (66), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:29,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:29,146 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-08-30 16:36:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 16:36:29,147 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 20 states have internal predecessors, (66), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-08-30 16:36:29,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:29,147 INFO L225 Difference]: With dead ends: 55 [2021-08-30 16:36:29,147 INFO L226 Difference]: Without dead ends: 55 [2021-08-30 16:36:29,148 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 387.97ms TimeCoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2021-08-30 16:36:29,148 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 128 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 203.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.37ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 261.15ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:29,149 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 56 Invalid, 598 Unknown, 0 Unchecked, 3.37ms Time], IncrementalHoareTripleChecker [19 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 261.15ms Time] [2021-08-30 16:36:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-30 16:36:29,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2021-08-30 16:36:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-08-30 16:36:29,150 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 35 [2021-08-30 16:36:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:29,151 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-08-30 16:36:29,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 20 states have internal predecessors, (66), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:29,151 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-08-30 16:36:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-30 16:36:29,151 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:29,151 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:29,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:29,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-30 16:36:29,352 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrcmpErr9REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:29,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:29,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1790582486, now seen corresponding path program 1 times [2021-08-30 16:36:29,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:29,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770882147] [2021-08-30 16:36:29,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:29,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:29,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:29,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:36:29,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:29,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770882147] [2021-08-30 16:36:29,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770882147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:29,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132748414] [2021-08-30 16:36:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:29,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:29,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:29,538 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:29,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-30 16:36:29,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:29,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-30 16:36:29,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:36:29,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:30,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:36:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:36:30,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132748414] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:30,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:30,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 26 [2021-08-30 16:36:30,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786330839] [2021-08-30 16:36:30,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-30 16:36:30,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:30,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-30 16:36:30,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-08-30 16:36:30,081 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 27 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:30,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:30,598 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-08-30 16:36:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-30 16:36:30,599 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-08-30 16:36:30,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:30,599 INFO L225 Difference]: With dead ends: 57 [2021-08-30 16:36:30,599 INFO L226 Difference]: Without dead ends: 54 [2021-08-30 16:36:30,600 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 431.89ms TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2021-08-30 16:36:30,600 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 120 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 288.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.95ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 357.03ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:30,600 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 73 Invalid, 871 Unknown, 0 Unchecked, 4.95ms Time], IncrementalHoareTripleChecker [24 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 357.03ms Time] [2021-08-30 16:36:30,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-30 16:36:30,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-08-30 16:36:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-08-30 16:36:30,602 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 37 [2021-08-30 16:36:30,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:30,602 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-08-30 16:36:30,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:30,602 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-08-30 16:36:30,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-30 16:36:30,603 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:30,603 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:30,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:30,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:30,803 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:30,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:30,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1790532757, now seen corresponding path program 1 times [2021-08-30 16:36:30,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:30,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267774964] [2021-08-30 16:36:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:30,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:30,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:36:31,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:31,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267774964] [2021-08-30 16:36:31,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267774964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:31,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690709452] [2021-08-30 16:36:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:31,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:31,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:31,010 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:31,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-30 16:36:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:31,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-30 16:36:31,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:31,219 INFO L388 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 21 treesize of output 17 [2021-08-30 16:36:31,713 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-08-30 16:36:31,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 19 [2021-08-30 16:36:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:36:31,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:31,996 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:36:31,996 INFO L388 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 103 treesize of output 103 [2021-08-30 16:36:32,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-30 16:36:32,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-30 16:36:32,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:36:32,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690709452] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:32,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:32,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 16] total 40 [2021-08-30 16:36:32,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059287749] [2021-08-30 16:36:32,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-30 16:36:32,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:32,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-30 16:36:32,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2021-08-30 16:36:32,220 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 40 states, 38 states have (on average 2.236842105263158) internal successors, (85), 36 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:32,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:32,905 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2021-08-30 16:36:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-30 16:36:32,906 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.236842105263158) internal successors, (85), 36 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-08-30 16:36:32,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:32,906 INFO L225 Difference]: With dead ends: 118 [2021-08-30 16:36:32,906 INFO L226 Difference]: Without dead ends: 60 [2021-08-30 16:36:32,907 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1088.52ms TimeCoverageRelationStatistics Valid=318, Invalid=3104, Unknown=0, NotChecked=0, Total=3422 [2021-08-30 16:36:32,908 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 107 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 179.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.17ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 222.68ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:32,908 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 69 Invalid, 686 Unknown, 0 Unchecked, 3.17ms Time], IncrementalHoareTripleChecker [28 Valid, 485 Invalid, 0 Unknown, 173 Unchecked, 222.68ms Time] [2021-08-30 16:36:32,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-30 16:36:32,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-08-30 16:36:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-08-30 16:36:32,910 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 37 [2021-08-30 16:36:32,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:32,910 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-08-30 16:36:32,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.236842105263158) internal successors, (85), 36 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:32,910 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-08-30 16:36:32,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-30 16:36:32,910 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:32,910 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:32,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:33,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:33,119 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:33,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:33,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1666823887, now seen corresponding path program 2 times [2021-08-30 16:36:33,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:33,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263094072] [2021-08-30 16:36:33,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:33,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:33,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:36:33,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:33,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263094072] [2021-08-30 16:36:33,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263094072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:33,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798903678] [2021-08-30 16:36:33,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:36:33,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:33,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:33,295 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:33,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-30 16:36:33,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:36:33,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:33,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-30 16:36:33,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:36:33,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:33,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:36:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:36:33,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798903678] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:33,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:33,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2021-08-30 16:36:33,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869673182] [2021-08-30 16:36:33,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-30 16:36:33,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:33,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-30 16:36:33,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-08-30 16:36:33,852 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 26 states, 25 states have (on average 3.2) internal successors, (80), 22 states have internal predecessors, (80), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:34,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:34,264 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-08-30 16:36:34,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-30 16:36:34,265 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.2) internal successors, (80), 22 states have internal predecessors, (80), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-08-30 16:36:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:34,266 INFO L225 Difference]: With dead ends: 65 [2021-08-30 16:36:34,266 INFO L226 Difference]: Without dead ends: 65 [2021-08-30 16:36:34,266 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 425.57ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-08-30 16:36:34,267 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 116 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.91ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 242.34ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:34,267 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 52 Invalid, 624 Unknown, 0 Unchecked, 2.91ms Time], IncrementalHoareTripleChecker [18 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 242.34ms Time] [2021-08-30 16:36:34,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-30 16:36:34,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-08-30 16:36:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.12) internal successors, (56), 52 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-08-30 16:36:34,269 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 45 [2021-08-30 16:36:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:34,269 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-08-30 16:36:34,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.2) internal successors, (80), 22 states have internal predecessors, (80), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:34,269 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-08-30 16:36:34,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-30 16:36:34,269 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:34,269 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:34,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:34,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-30 16:36:34,485 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash 205044466, now seen corresponding path program 2 times [2021-08-30 16:36:34,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:34,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610874018] [2021-08-30 16:36:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:34,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:34,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:36:34,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:34,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610874018] [2021-08-30 16:36:34,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610874018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:34,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341388797] [2021-08-30 16:36:34,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:36:34,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:34,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:34,653 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:34,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-30 16:36:34,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:36:34,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:34,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-30 16:36:34,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:34,984 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:36:34,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:35,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:36:35,245 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:36:35,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341388797] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:35,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:35,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2021-08-30 16:36:35,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862165933] [2021-08-30 16:36:35,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-30 16:36:35,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:35,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-30 16:36:35,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2021-08-30 16:36:35,247 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 28 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:35,667 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-08-30 16:36:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-30 16:36:35,667 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-08-30 16:36:35,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:35,668 INFO L225 Difference]: With dead ends: 60 [2021-08-30 16:36:35,668 INFO L226 Difference]: Without dead ends: 60 [2021-08-30 16:36:35,668 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 460.63ms TimeCoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2021-08-30 16:36:35,668 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 146 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 209.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.85ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 252.84ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:35,669 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 43 Invalid, 595 Unknown, 0 Unchecked, 1.85ms Time], IncrementalHoareTripleChecker [29 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 252.84ms Time] [2021-08-30 16:36:35,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-30 16:36:35,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-08-30 16:36:35,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-08-30 16:36:35,672 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 47 [2021-08-30 16:36:35,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:35,672 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-08-30 16:36:35,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:35,672 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-08-30 16:36:35,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-30 16:36:35,673 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:35,673 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:35,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:35,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-30 16:36:35,877 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrcmpErr9REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:35,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:35,877 INFO L82 PathProgramCache]: Analyzing trace with hash 2055891520, now seen corresponding path program 2 times [2021-08-30 16:36:35,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:35,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301768455] [2021-08-30 16:36:35,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:35,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:36,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:36:36,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:36,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301768455] [2021-08-30 16:36:36,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301768455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:36,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031837964] [2021-08-30 16:36:36,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:36:36,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:36,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:36,069 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:36,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-30 16:36:36,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-30 16:36:36,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:36,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-30 16:36:36,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-08-30 16:36:36,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 16:36:36,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031837964] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:36:36,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 16:36:36,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 17 [2021-08-30 16:36:36,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409877683] [2021-08-30 16:36:36,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:36:36,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:36,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:36:36,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-30 16:36:36,263 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:36,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:36,327 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-08-30 16:36:36,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:36:36,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-30 16:36:36,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:36,328 INFO L225 Difference]: With dead ends: 58 [2021-08-30 16:36:36,328 INFO L226 Difference]: Without dead ends: 55 [2021-08-30 16:36:36,328 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 139.68ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-30 16:36:36,329 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.37ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.64ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:36,329 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 16 Invalid, 123 Unknown, 0 Unchecked, 0.37ms Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 51.64ms Time] [2021-08-30 16:36:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-30 16:36:36,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-08-30 16:36:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 50 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-08-30 16:36:36,331 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 51 [2021-08-30 16:36:36,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:36,331 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-08-30 16:36:36,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:36,332 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-08-30 16:36:36,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-30 16:36:36,332 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:36,332 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:36,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:36,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-30 16:36:36,549 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:36,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2055941249, now seen corresponding path program 3 times [2021-08-30 16:36:36,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:36,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828401721] [2021-08-30 16:36:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:36,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:36,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:36:36,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:36,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828401721] [2021-08-30 16:36:36,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828401721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:36,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901268112] [2021-08-30 16:36:36,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:36:36,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:36,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:36,766 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:36,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-30 16:36:36,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-30 16:36:36,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:36,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-30 16:36:36,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:36,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-30 16:36:37,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:36:37,138 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:36:37,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-08-30 16:36:37,741 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-30 16:36:37,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-08-30 16:36:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:36:37,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:42,070 INFO L388 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 13 [2021-08-30 16:36:42,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 16:36:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:36:42,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901268112] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:42,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:42,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 36 [2021-08-30 16:36:42,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413851449] [2021-08-30 16:36:42,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-30 16:36:42,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:42,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-30 16:36:42,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2021-08-30 16:36:42,267 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 32 states have internal predecessors, (104), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:42,682 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-08-30 16:36:42,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-30 16:36:42,682 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 32 states have internal predecessors, (104), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-08-30 16:36:42,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:42,683 INFO L225 Difference]: With dead ends: 94 [2021-08-30 16:36:42,683 INFO L226 Difference]: Without dead ends: 62 [2021-08-30 16:36:42,683 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 5026.45ms TimeCoverageRelationStatistics Valid=178, Invalid=1714, Unknown=0, NotChecked=0, Total=1892 [2021-08-30 16:36:42,684 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 142.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.51ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 177.39ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:42,684 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 71 Invalid, 637 Unknown, 0 Unchecked, 1.51ms Time], IncrementalHoareTripleChecker [16 Valid, 492 Invalid, 0 Unknown, 129 Unchecked, 177.39ms Time] [2021-08-30 16:36:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-30 16:36:42,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-08-30 16:36:42,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 54 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:42,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-08-30 16:36:42,686 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 51 [2021-08-30 16:36:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:42,687 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-08-30 16:36:42,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 32 states have internal predecessors, (104), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-08-30 16:36:42,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-30 16:36:42,688 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:42,688 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:42,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:42,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:42,901 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:42,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1984837956, now seen corresponding path program 4 times [2021-08-30 16:36:42,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:42,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520436382] [2021-08-30 16:36:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:42,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:43,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:43,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-30 16:36:43,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:43,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520436382] [2021-08-30 16:36:43,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520436382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:43,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299295286] [2021-08-30 16:36:43,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:36:43,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:43,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:43,097 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:43,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-30 16:36:43,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:36:43,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:43,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 73 conjunts are in the unsatisfiable core [2021-08-30 16:36:43,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:43,217 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:36:43,218 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 16:36:43,512 INFO L388 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 15 treesize of output 11 [2021-08-30 16:36:43,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-08-30 16:36:44,069 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-08-30 16:36:44,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 24 [2021-08-30 16:36:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:36:44,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:44,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:36:44,885 INFO L388 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 109 treesize of output 109 [2021-08-30 16:36:44,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-08-30 16:36:44,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-30 16:36:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:36:45,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299295286] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:45,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:45,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 50 [2021-08-30 16:36:45,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828380958] [2021-08-30 16:36:45,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-30 16:36:45,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:45,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-30 16:36:45,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2280, Unknown=0, NotChecked=0, Total=2450 [2021-08-30 16:36:45,527 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 50 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 46 states have internal predecessors, (122), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:47,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:47,174 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2021-08-30 16:36:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-30 16:36:47,174 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 46 states have internal predecessors, (122), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-08-30 16:36:47,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:47,175 INFO L225 Difference]: With dead ends: 96 [2021-08-30 16:36:47,175 INFO L226 Difference]: Without dead ends: 74 [2021-08-30 16:36:47,176 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2343.02ms TimeCoverageRelationStatistics Valid=518, Invalid=5962, Unknown=0, NotChecked=0, Total=6480 [2021-08-30 16:36:47,177 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 151 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 419.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.72ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 567 IncrementalHoareTripleChecker+Unchecked, 506.48ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:47,177 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 120 Invalid, 1885 Unknown, 0 Unchecked, 3.72ms Time], IncrementalHoareTripleChecker [35 Valid, 1283 Invalid, 0 Unknown, 567 Unchecked, 506.48ms Time] [2021-08-30 16:36:47,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-30 16:36:47,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2021-08-30 16:36:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 62 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:47,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-08-30 16:36:47,179 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 55 [2021-08-30 16:36:47,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:47,179 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-08-30 16:36:47,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 2.5416666666666665) internal successors, (122), 46 states have internal predecessors, (122), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:47,179 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-08-30 16:36:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-30 16:36:47,180 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:47,180 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:47,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:47,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:47,380 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:47,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:47,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1240269832, now seen corresponding path program 3 times [2021-08-30 16:36:47,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:47,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88856580] [2021-08-30 16:36:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:47,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:47,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:36:47,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:47,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88856580] [2021-08-30 16:36:47,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88856580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:47,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736033216] [2021-08-30 16:36:47,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:36:47,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:47,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:47,597 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:47,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-30 16:36:47,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-30 16:36:47,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:47,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-30 16:36:47,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:47,732 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:36:47,733 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 16:36:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:36:48,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:36:48,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736033216] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:48,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:48,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 39 [2021-08-30 16:36:48,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777365584] [2021-08-30 16:36:48,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-30 16:36:48,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:48,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-30 16:36:48,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1373, Unknown=0, NotChecked=0, Total=1560 [2021-08-30 16:36:48,702 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 40 states, 38 states have (on average 3.6315789473684212) internal successors, (138), 36 states have internal predecessors, (138), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:49,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:49,310 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2021-08-30 16:36:49,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-30 16:36:49,311 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.6315789473684212) internal successors, (138), 36 states have internal predecessors, (138), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2021-08-30 16:36:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:49,311 INFO L225 Difference]: With dead ends: 70 [2021-08-30 16:36:49,312 INFO L226 Difference]: Without dead ends: 70 [2021-08-30 16:36:49,312 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 785.96ms TimeCoverageRelationStatistics Valid=338, Invalid=2212, Unknown=0, NotChecked=0, Total=2550 [2021-08-30 16:36:49,313 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 165 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 245.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 294.47ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:49,313 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 56 Invalid, 866 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [36 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 294.47ms Time] [2021-08-30 16:36:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-30 16:36:49,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-08-30 16:36:49,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-08-30 16:36:49,316 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2021-08-30 16:36:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:49,317 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-08-30 16:36:49,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 3.6315789473684212) internal successors, (138), 36 states have internal predecessors, (138), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:49,317 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-08-30 16:36:49,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-30 16:36:49,318 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:49,318 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:49,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:49,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-30 16:36:49,521 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:49,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1003947369, now seen corresponding path program 5 times [2021-08-30 16:36:49,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:49,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813185319] [2021-08-30 16:36:49,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:49,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:49,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:36:49,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:49,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813185319] [2021-08-30 16:36:49,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813185319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:49,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880207337] [2021-08-30 16:36:49,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:36:49,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:49,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:49,773 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:49,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-30 16:36:49,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-30 16:36:49,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:49,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-30 16:36:49,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:49,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-30 16:36:50,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-08-30 16:36:50,235 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-30 16:36:50,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-08-30 16:36:51,208 INFO L354 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2021-08-30 16:36:51,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 34 [2021-08-30 16:36:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:36:51,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:51,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-08-30 16:36:51,836 INFO L388 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 13 [2021-08-30 16:36:51,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 16:36:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-30 16:36:52,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880207337] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:52,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:52,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 14] total 45 [2021-08-30 16:36:52,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562845230] [2021-08-30 16:36:52,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-30 16:36:52,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:52,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-30 16:36:52,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1818, Unknown=0, NotChecked=0, Total=1980 [2021-08-30 16:36:52,142 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 45 states, 44 states have (on average 3.409090909090909) internal successors, (150), 41 states have internal predecessors, (150), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:53,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:36:53,006 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2021-08-30 16:36:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-30 16:36:53,006 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.409090909090909) internal successors, (150), 41 states have internal predecessors, (150), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2021-08-30 16:36:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:36:53,007 INFO L225 Difference]: With dead ends: 126 [2021-08-30 16:36:53,007 INFO L226 Difference]: Without dead ends: 84 [2021-08-30 16:36:53,008 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1754.95ms TimeCoverageRelationStatistics Valid=331, Invalid=3451, Unknown=0, NotChecked=0, Total=3782 [2021-08-30 16:36:53,009 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 113 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 212.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.71ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 259.71ms IncrementalHoareTripleChecker+Time [2021-08-30 16:36:53,009 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 63 Invalid, 846 Unknown, 0 Unchecked, 1.71ms Time], IncrementalHoareTripleChecker [21 Valid, 672 Invalid, 0 Unknown, 153 Unchecked, 259.71ms Time] [2021-08-30 16:36:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-30 16:36:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2021-08-30 16:36:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 72 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:53,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-08-30 16:36:53,011 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 65 [2021-08-30 16:36:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:36:53,012 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-08-30 16:36:53,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.409090909090909) internal successors, (150), 41 states have internal predecessors, (150), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:36:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-08-30 16:36:53,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-30 16:36:53,013 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:36:53,013 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:36:53,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-30 16:36:53,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:53,233 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:36:53,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:36:53,233 INFO L82 PathProgramCache]: Analyzing trace with hash -614215269, now seen corresponding path program 4 times [2021-08-30 16:36:53,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:36:53,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833798735] [2021-08-30 16:36:53,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:36:53,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:36:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:53,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:36:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:36:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:36:53,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:36:53,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833798735] [2021-08-30 16:36:53,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833798735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:36:53,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949790487] [2021-08-30 16:36:53,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:36:53,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:36:53,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:36:53,701 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:36:53,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-30 16:36:53,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:36:53,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:36:53,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-30 16:36:53,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:36:53,831 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:36:53,831 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 16:36:54,205 INFO L388 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 15 treesize of output 11 [2021-08-30 16:36:54,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-08-30 16:36:54,759 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-08-30 16:36:54,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 24 [2021-08-30 16:36:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-30 16:36:54,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:36:57,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:36:57,748 INFO L388 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 109 treesize of output 109 [2021-08-30 16:36:57,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-08-30 16:36:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-30 16:36:58,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949790487] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:36:58,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:36:58,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 23] total 62 [2021-08-30 16:36:58,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139950797] [2021-08-30 16:36:58,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-30 16:36:58,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:36:58,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-30 16:36:58,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=3540, Unknown=1, NotChecked=0, Total=3782 [2021-08-30 16:36:58,507 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 62 states, 59 states have (on average 2.694915254237288) internal successors, (159), 58 states have internal predecessors, (159), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:00,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:00,101 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2021-08-30 16:37:00,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-30 16:37:00,101 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 59 states have (on average 2.694915254237288) internal successors, (159), 58 states have internal predecessors, (159), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-08-30 16:37:00,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:00,101 INFO L225 Difference]: With dead ends: 115 [2021-08-30 16:37:00,101 INFO L226 Difference]: Without dead ends: 87 [2021-08-30 16:37:00,103 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1904 ImplicationChecksByTransitivity, 4458.35ms TimeCoverageRelationStatistics Valid=629, Invalid=7380, Unknown=1, NotChecked=0, Total=8010 [2021-08-30 16:37:00,103 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 160 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 533.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.47ms SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 749 IncrementalHoareTripleChecker+Unchecked, 644.24ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:00,103 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 125 Invalid, 2605 Unknown, 0 Unchecked, 4.47ms Time], IncrementalHoareTripleChecker [43 Valid, 1813 Invalid, 0 Unknown, 749 Unchecked, 644.24ms Time] [2021-08-30 16:37:00,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-30 16:37:00,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2021-08-30 16:37:00,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 76 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-08-30 16:37:00,106 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 71 [2021-08-30 16:37:00,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:00,106 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-08-30 16:37:00,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 59 states have (on average 2.694915254237288) internal successors, (159), 58 states have internal predecessors, (159), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-08-30 16:37:00,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-30 16:37:00,107 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:00,107 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:00,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-30 16:37:00,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:37:00,321 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:37:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:00,321 INFO L82 PathProgramCache]: Analyzing trace with hash 746041886, now seen corresponding path program 5 times [2021-08-30 16:37:00,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:00,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532870055] [2021-08-30 16:37:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:00,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:00,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-30 16:37:00,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:00,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532870055] [2021-08-30 16:37:00,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532870055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:37:00,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917274932] [2021-08-30 16:37:00,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:37:00,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:37:00,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:37:00,565 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:37:00,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-30 16:37:00,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-30 16:37:00,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:37:00,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-30 16:37:00,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:37:00,718 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:37:00,719 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 16:37:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-30 16:37:01,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:37:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-30 16:37:01,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917274932] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:37:01,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:37:01,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 45 [2021-08-30 16:37:01,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737227571] [2021-08-30 16:37:01,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-30 16:37:01,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:01,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-30 16:37:01,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1837, Unknown=0, NotChecked=0, Total=2070 [2021-08-30 16:37:01,953 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 46 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:02,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:02,592 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2021-08-30 16:37:02,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-30 16:37:02,592 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-08-30 16:37:02,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:02,593 INFO L225 Difference]: With dead ends: 84 [2021-08-30 16:37:02,593 INFO L226 Difference]: Without dead ends: 84 [2021-08-30 16:37:02,594 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 900.80ms TimeCoverageRelationStatistics Valid=401, Invalid=3021, Unknown=0, NotChecked=0, Total=3422 [2021-08-30 16:37:02,595 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 156 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 274.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.93ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 338.87ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:02,595 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 47 Invalid, 963 Unknown, 0 Unchecked, 1.93ms Time], IncrementalHoareTripleChecker [34 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 338.87ms Time] [2021-08-30 16:37:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-30 16:37:02,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-08-30 16:37:02,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 78 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2021-08-30 16:37:02,597 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 75 [2021-08-30 16:37:02,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:02,597 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2021-08-30 16:37:02,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:02,598 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2021-08-30 16:37:02,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-30 16:37:02,598 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:02,598 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:02,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-30 16:37:02,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-30 16:37:02,816 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:37:02,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:02,816 INFO L82 PathProgramCache]: Analyzing trace with hash -421352019, now seen corresponding path program 6 times [2021-08-30 16:37:02,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:02,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953680623] [2021-08-30 16:37:02,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:02,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:03,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-30 16:37:03,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:03,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953680623] [2021-08-30 16:37:03,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953680623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:37:03,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051637939] [2021-08-30 16:37:03,172 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:37:03,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:37:03,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:37:03,173 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:37:03,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-30 16:37:03,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-30 16:37:03,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:37:03,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-30 16:37:03,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:37:03,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-30 16:37:03,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-08-30 16:37:03,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-30 16:37:03,697 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-30 16:37:03,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-08-30 16:37:04,348 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-08-30 16:37:04,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 32 [2021-08-30 16:37:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-08-30 16:37:04,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:37:05,069 INFO L388 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 31 treesize of output 29 [2021-08-30 16:37:05,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-08-30 16:37:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-08-30 16:37:05,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051637939] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:37:05,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:37:05,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 8] total 35 [2021-08-30 16:37:05,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073717149] [2021-08-30 16:37:05,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-30 16:37:05,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:05,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-30 16:37:05,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1104, Unknown=0, NotChecked=0, Total=1190 [2021-08-30 16:37:05,260 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 35 states, 34 states have (on average 3.3529411764705883) internal successors, (114), 31 states have internal predecessors, (114), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:06,425 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2021-08-30 16:37:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-30 16:37:06,426 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.3529411764705883) internal successors, (114), 31 states have internal predecessors, (114), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2021-08-30 16:37:06,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:06,426 INFO L225 Difference]: With dead ends: 141 [2021-08-30 16:37:06,427 INFO L226 Difference]: Without dead ends: 89 [2021-08-30 16:37:06,427 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1637.63ms TimeCoverageRelationStatistics Valid=336, Invalid=4086, Unknown=0, NotChecked=0, Total=4422 [2021-08-30 16:37:06,428 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 188.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.64ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 237.44ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:06,428 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 91 Invalid, 871 Unknown, 0 Unchecked, 1.64ms Time], IncrementalHoareTripleChecker [2 Valid, 687 Invalid, 0 Unknown, 182 Unchecked, 237.44ms Time] [2021-08-30 16:37:06,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-30 16:37:06,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2021-08-30 16:37:06,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:06,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2021-08-30 16:37:06,431 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 79 [2021-08-30 16:37:06,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:06,431 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2021-08-30 16:37:06,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.3529411764705883) internal successors, (114), 31 states have internal predecessors, (114), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:06,431 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2021-08-30 16:37:06,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-30 16:37:06,432 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:06,432 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:06,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-30 16:37:06,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:37:06,645 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:37:06,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:06,645 INFO L82 PathProgramCache]: Analyzing trace with hash -735803919, now seen corresponding path program 6 times [2021-08-30 16:37:06,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:06,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113401599] [2021-08-30 16:37:06,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:06,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:07,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:07,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:07,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113401599] [2021-08-30 16:37:07,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113401599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:37:07,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597176198] [2021-08-30 16:37:07,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:37:07,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:37:07,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:37:07,233 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:37:07,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-30 16:37:07,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-30 16:37:07,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:37:07,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 89 conjunts are in the unsatisfiable core [2021-08-30 16:37:07,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:37:07,588 INFO L388 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 21 treesize of output 17 [2021-08-30 16:37:07,855 INFO L388 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 [2021-08-30 16:37:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 88 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-30 16:37:07,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:37:08,145 INFO L388 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 13 [2021-08-30 16:37:08,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-30 16:37:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 88 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-30 16:37:08,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597176198] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:37:08,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:37:08,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21, 22] total 49 [2021-08-30 16:37:08,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874567505] [2021-08-30 16:37:08,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-30 16:37:08,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-30 16:37:08,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2201, Unknown=0, NotChecked=0, Total=2352 [2021-08-30 16:37:08,334 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 49 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 45 states have internal predecessors, (130), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:09,718 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2021-08-30 16:37:09,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-30 16:37:09,719 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 45 states have internal predecessors, (130), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-08-30 16:37:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:09,719 INFO L225 Difference]: With dead ends: 130 [2021-08-30 16:37:09,719 INFO L226 Difference]: Without dead ends: 96 [2021-08-30 16:37:09,720 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 148 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 1497.42ms TimeCoverageRelationStatistics Valid=352, Invalid=4760, Unknown=0, NotChecked=0, Total=5112 [2021-08-30 16:37:09,720 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 135 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 652.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.82ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 803.68ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:09,720 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 114 Invalid, 2579 Unknown, 0 Unchecked, 4.82ms Time], IncrementalHoareTripleChecker [38 Valid, 2434 Invalid, 0 Unknown, 107 Unchecked, 803.68ms Time] [2021-08-30 16:37:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-30 16:37:09,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-08-30 16:37:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2021-08-30 16:37:09,723 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 85 [2021-08-30 16:37:09,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:09,723 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2021-08-30 16:37:09,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 45 states have internal predecessors, (130), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:09,724 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2021-08-30 16:37:09,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-30 16:37:09,724 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:09,724 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:09,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-30 16:37:09,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:37:09,940 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:37:09,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:09,940 INFO L82 PathProgramCache]: Analyzing trace with hash 650863924, now seen corresponding path program 7 times [2021-08-30 16:37:09,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:09,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652506190] [2021-08-30 16:37:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:09,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:10,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:10,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-30 16:37:10,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:10,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652506190] [2021-08-30 16:37:10,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652506190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:37:10,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609266780] [2021-08-30 16:37:10,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:37:10,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:37:10,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:37:10,229 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:37:10,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-30 16:37:10,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:10,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-30 16:37:10,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:37:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-30 16:37:10,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:37:11,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:37:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-30 16:37:11,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609266780] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:37:11,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:37:11,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 39 [2021-08-30 16:37:11,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131328216] [2021-08-30 16:37:11,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-30 16:37:11,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:11,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-30 16:37:11,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1401, Unknown=0, NotChecked=0, Total=1560 [2021-08-30 16:37:11,262 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 40 states, 36 states have (on average 3.861111111111111) internal successors, (139), 36 states have internal predecessors, (139), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:12,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:12,039 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2021-08-30 16:37:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-30 16:37:12,039 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 3.861111111111111) internal successors, (139), 36 states have internal predecessors, (139), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-08-30 16:37:12,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:12,040 INFO L225 Difference]: With dead ends: 97 [2021-08-30 16:37:12,040 INFO L226 Difference]: Without dead ends: 97 [2021-08-30 16:37:12,040 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 841.92ms TimeCoverageRelationStatistics Valid=345, Invalid=2625, Unknown=0, NotChecked=0, Total=2970 [2021-08-30 16:37:12,041 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 156 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 388.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.84ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 476.05ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:12,041 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 73 Invalid, 1469 Unknown, 0 Unchecked, 2.84ms Time], IncrementalHoareTripleChecker [36 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 476.05ms Time] [2021-08-30 16:37:12,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-30 16:37:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-08-30 16:37:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:12,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2021-08-30 16:37:12,043 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 89 [2021-08-30 16:37:12,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:12,044 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2021-08-30 16:37:12,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 3.861111111111111) internal successors, (139), 36 states have internal predecessors, (139), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2021-08-30 16:37:12,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-30 16:37:12,045 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:12,045 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:12,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-30 16:37:12,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:37:12,249 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:37:12,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:12,249 INFO L82 PathProgramCache]: Analyzing trace with hash -264733948, now seen corresponding path program 8 times [2021-08-30 16:37:12,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:12,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466852348] [2021-08-30 16:37:12,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:12,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:12,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 82 proven. 71 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-30 16:37:12,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:12,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466852348] [2021-08-30 16:37:12,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466852348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:37:12,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174706345] [2021-08-30 16:37:12,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:37:12,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:37:12,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:37:12,529 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:37:12,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-30 16:37:12,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:37:12,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:37:12,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-30 16:37:12,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:37:12,691 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 16:37:12,692 INFO L388 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-30 16:37:12,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:37:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 103 proven. 50 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-30 16:37:13,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:37:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 87 proven. 66 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-30 16:37:13,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174706345] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:37:13,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:37:13,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 44 [2021-08-30 16:37:13,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725636625] [2021-08-30 16:37:13,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-30 16:37:13,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:13,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-30 16:37:13,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=1596, Unknown=0, NotChecked=0, Total=1892 [2021-08-30 16:37:13,678 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 44 states, 44 states have (on average 3.8636363636363638) internal successors, (170), 41 states have internal predecessors, (170), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:14,292 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2021-08-30 16:37:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-30 16:37:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.8636363636363638) internal successors, (170), 41 states have internal predecessors, (170), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-08-30 16:37:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:14,293 INFO L225 Difference]: With dead ends: 166 [2021-08-30 16:37:14,293 INFO L226 Difference]: Without dead ends: 103 [2021-08-30 16:37:14,293 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 900.21ms TimeCoverageRelationStatistics Valid=556, Invalid=2866, Unknown=0, NotChecked=0, Total=3422 [2021-08-30 16:37:14,294 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 109 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 254.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.87ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 306.87ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:14,294 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 44 Invalid, 869 Unknown, 0 Unchecked, 1.87ms Time], IncrementalHoareTripleChecker [16 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 306.87ms Time] [2021-08-30 16:37:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-30 16:37:14,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-08-30 16:37:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:14,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2021-08-30 16:37:14,298 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 95 [2021-08-30 16:37:14,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:14,299 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2021-08-30 16:37:14,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.8636363636363638) internal successors, (170), 41 states have internal predecessors, (170), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:14,299 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2021-08-30 16:37:14,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-08-30 16:37:14,299 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:14,300 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:14,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-30 16:37:14,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-30 16:37:14,513 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:37:14,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:14,513 INFO L82 PathProgramCache]: Analyzing trace with hash -452087993, now seen corresponding path program 9 times [2021-08-30 16:37:14,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:14,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524426494] [2021-08-30 16:37:14,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:14,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:15,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:15,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:15,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524426494] [2021-08-30 16:37:15,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524426494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:37:15,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346333588] [2021-08-30 16:37:15,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:37:15,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:37:15,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:37:15,218 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:37:15,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-30 16:37:15,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-30 16:37:15,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:37:15,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 143 conjunts are in the unsatisfiable core [2021-08-30 16:37:15,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:37:15,542 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:37:15,542 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 16:37:15,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-30 16:37:16,847 INFO L388 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 [2021-08-30 16:37:16,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-30 16:37:16,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-08-30 16:37:18,342 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-30 16:37:18,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 55 treesize of output 47 [2021-08-30 16:37:18,612 INFO L354 Elim1Store]: treesize reduction 74, result has 3.9 percent of original size [2021-08-30 16:37:18,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 43 [2021-08-30 16:37:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:18,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:37:20,368 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-08-30 16:37:20,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 248 treesize of output 213 [2021-08-30 16:37:20,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:37:20,383 INFO L388 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 181 treesize of output 175 [2021-08-30 16:37:20,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-08-30 16:37:20,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:37:20,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:37:20,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 63 [2021-08-30 16:37:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:37:28,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346333588] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:37:28,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:37:28,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 38, 38] total 101 [2021-08-30 16:37:28,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97257025] [2021-08-30 16:37:28,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-08-30 16:37:28,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:37:28,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-08-30 16:37:28,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=9472, Unknown=0, NotChecked=0, Total=10100 [2021-08-30 16:37:28,242 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 101 states, 98 states have (on average 2.7244897959183674) internal successors, (267), 97 states have internal predecessors, (267), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:50,727 WARN L210 SmtUtils]: Spent 18.10s on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-08-30 16:37:56,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:37:56,362 INFO L93 Difference]: Finished difference Result 223 states and 228 transitions. [2021-08-30 16:37:56,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-30 16:37:56,363 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 98 states have (on average 2.7244897959183674) internal successors, (267), 97 states have internal predecessors, (267), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-08-30 16:37:56,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:37:56,364 INFO L225 Difference]: With dead ends: 223 [2021-08-30 16:37:56,364 INFO L226 Difference]: Without dead ends: 143 [2021-08-30 16:37:56,366 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7169 ImplicationChecksByTransitivity, 31934.89ms TimeCoverageRelationStatistics Valid=1822, Invalid=25564, Unknown=4, NotChecked=0, Total=27390 [2021-08-30 16:37:56,367 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 407 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 3736 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1329.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 5162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.66ms SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 3736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1298 IncrementalHoareTripleChecker+Unchecked, 1584.70ms IncrementalHoareTripleChecker+Time [2021-08-30 16:37:56,367 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 185 Invalid, 5162 Unknown, 0 Unchecked, 9.66ms Time], IncrementalHoareTripleChecker [128 Valid, 3736 Invalid, 0 Unknown, 1298 Unchecked, 1584.70ms Time] [2021-08-30 16:37:56,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-30 16:37:56,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2021-08-30 16:37:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:56,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2021-08-30 16:37:56,370 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 99 [2021-08-30 16:37:56,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:37:56,370 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2021-08-30 16:37:56,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 98 states have (on average 2.7244897959183674) internal successors, (267), 97 states have internal predecessors, (267), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:37:56,371 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2021-08-30 16:37:56,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-08-30 16:37:56,371 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:37:56,371 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:37:56,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-30 16:37:56,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-30 16:37:56,581 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:37:56,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:37:56,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1035648330, now seen corresponding path program 10 times [2021-08-30 16:37:56,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:37:56,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797879855] [2021-08-30 16:37:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:37:56,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:37:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:56,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:37:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:37:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-30 16:37:56,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:37:56,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797879855] [2021-08-30 16:37:56,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797879855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:37:56,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875485134] [2021-08-30 16:37:56,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:37:56,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:37:56,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:37:56,922 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:37:56,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-30 16:37:57,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:37:57,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:37:57,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 139 conjunts are in the unsatisfiable core [2021-08-30 16:37:57,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:37:57,071 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:37:57,071 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 16:37:57,656 INFO L388 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 [2021-08-30 16:37:58,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-30 16:37:58,693 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-08-30 16:37:58,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 20 [2021-08-30 16:37:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 50 proven. 124 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-30 16:37:58,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:02,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:38:02,436 INFO L388 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 116 treesize of output 116 [2021-08-30 16:38:02,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-30 16:38:02,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-08-30 16:38:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-30 16:38:04,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875485134] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:04,003 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:04,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30, 30] total 79 [2021-08-30 16:38:04,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78793295] [2021-08-30 16:38:04,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-08-30 16:38:04,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:04,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-08-30 16:38:04,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=5739, Unknown=1, NotChecked=0, Total=6320 [2021-08-30 16:38:04,005 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 80 states, 76 states have (on average 3.0) internal successors, (228), 76 states have internal predecessors, (228), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:06,747 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2021-08-30 16:38:06,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-30 16:38:06,747 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 76 states have (on average 3.0) internal successors, (228), 76 states have internal predecessors, (228), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2021-08-30 16:38:06,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:06,748 INFO L225 Difference]: With dead ends: 116 [2021-08-30 16:38:06,748 INFO L226 Difference]: Without dead ends: 116 [2021-08-30 16:38:06,748 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 6360.49ms TimeCoverageRelationStatistics Valid=1125, Invalid=10646, Unknown=1, NotChecked=0, Total=11772 [2021-08-30 16:38:06,749 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 304 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 2527 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 902.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.88ms SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 2527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 1069.20ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:06,749 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 98 Invalid, 2911 Unknown, 0 Unchecked, 5.88ms Time], IncrementalHoareTripleChecker [145 Valid, 2527 Invalid, 0 Unknown, 239 Unchecked, 1069.20ms Time] [2021-08-30 16:38:06,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-30 16:38:06,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-08-30 16:38:06,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 111 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2021-08-30 16:38:06,756 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 103 [2021-08-30 16:38:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:06,757 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2021-08-30 16:38:06,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 76 states have (on average 3.0) internal successors, (228), 76 states have internal predecessors, (228), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2021-08-30 16:38:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-30 16:38:06,761 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:06,761 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:06,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:06,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:06,965 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:38:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:06,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1010836502, now seen corresponding path program 11 times [2021-08-30 16:38:06,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:06,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314876096] [2021-08-30 16:38:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:06,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:07,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:07,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 165 proven. 93 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-30 16:38:07,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:07,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314876096] [2021-08-30 16:38:07,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314876096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:07,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674748073] [2021-08-30 16:38:07,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:38:07,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:07,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:07,263 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:38:07,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-30 16:38:07,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-30 16:38:07,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:07,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-30 16:38:07,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:07,498 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:38:07,498 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 16:38:08,235 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 185 proven. 73 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-30 16:38:08,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 185 proven. 73 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-30 16:38:08,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674748073] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:08,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:08,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 54 [2021-08-30 16:38:08,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51703812] [2021-08-30 16:38:08,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-30 16:38:08,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:08,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-30 16:38:08,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=2432, Unknown=0, NotChecked=0, Total=2862 [2021-08-30 16:38:08,820 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 54 states, 53 states have (on average 3.9622641509433962) internal successors, (210), 50 states have internal predecessors, (210), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:09,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:09,450 INFO L93 Difference]: Finished difference Result 172 states and 175 transitions. [2021-08-30 16:38:09,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-30 16:38:09,451 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 3.9622641509433962) internal successors, (210), 50 states have internal predecessors, (210), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-08-30 16:38:09,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:09,451 INFO L225 Difference]: With dead ends: 172 [2021-08-30 16:38:09,452 INFO L226 Difference]: Without dead ends: 123 [2021-08-30 16:38:09,452 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 900.63ms TimeCoverageRelationStatistics Valid=664, Invalid=3758, Unknown=0, NotChecked=0, Total=4422 [2021-08-30 16:38:09,452 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 132 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 321.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.40ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 392.07ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:09,453 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 50 Invalid, 1107 Unknown, 0 Unchecked, 2.40ms Time], IncrementalHoareTripleChecker [35 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 392.07ms Time] [2021-08-30 16:38:09,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-30 16:38:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2021-08-30 16:38:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 115 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2021-08-30 16:38:09,455 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 115 [2021-08-30 16:38:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:09,456 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2021-08-30 16:38:09,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 3.9622641509433962) internal successors, (210), 50 states have internal predecessors, (210), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2021-08-30 16:38:09,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-08-30 16:38:09,457 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:09,457 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:09,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:09,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:09,665 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:38:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:09,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1586398189, now seen corresponding path program 12 times [2021-08-30 16:38:09,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:09,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702750790] [2021-08-30 16:38:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:09,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:10,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 156 proven. 102 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-30 16:38:10,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:10,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702750790] [2021-08-30 16:38:10,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702750790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:10,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743184776] [2021-08-30 16:38:10,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:38:10,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:10,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:10,057 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:38:10,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-30 16:38:10,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-30 16:38:10,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:10,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-30 16:38:10,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:10,575 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 16:38:10,575 INFO L388 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-30 16:38:10,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:38:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 192 proven. 66 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-30 16:38:11,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 192 proven. 66 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-30 16:38:11,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743184776] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:11,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:11,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 52 [2021-08-30 16:38:11,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757927100] [2021-08-30 16:38:11,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-30 16:38:11,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:11,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-30 16:38:11,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=2216, Unknown=0, NotChecked=0, Total=2652 [2021-08-30 16:38:11,958 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 52 states, 52 states have (on average 4.1923076923076925) internal successors, (218), 48 states have internal predecessors, (218), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:12,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:12,916 INFO L93 Difference]: Finished difference Result 288 states and 293 transitions. [2021-08-30 16:38:12,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-30 16:38:12,917 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.1923076923076925) internal successors, (218), 48 states have internal predecessors, (218), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2021-08-30 16:38:12,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:12,917 INFO L225 Difference]: With dead ends: 288 [2021-08-30 16:38:12,917 INFO L226 Difference]: Without dead ends: 128 [2021-08-30 16:38:12,918 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 1301.80ms TimeCoverageRelationStatistics Valid=883, Invalid=4667, Unknown=0, NotChecked=0, Total=5550 [2021-08-30 16:38:12,919 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 154 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 370.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.26ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 445.11ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:12,919 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 41 Invalid, 1071 Unknown, 0 Unchecked, 2.26ms Time], IncrementalHoareTripleChecker [25 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 445.11ms Time] [2021-08-30 16:38:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-30 16:38:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-08-30 16:38:12,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.032520325203252) internal successors, (127), 123 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2021-08-30 16:38:12,922 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 119 [2021-08-30 16:38:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:12,922 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2021-08-30 16:38:12,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.1923076923076925) internal successors, (218), 48 states have internal predecessors, (218), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2021-08-30 16:38:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-08-30 16:38:12,923 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:12,923 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:12,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-30 16:38:13,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:13,137 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:38:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:13,137 INFO L82 PathProgramCache]: Analyzing trace with hash -363601677, now seen corresponding path program 13 times [2021-08-30 16:38:13,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:13,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762978883] [2021-08-30 16:38:13,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:13,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:13,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 24 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:13,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:13,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762978883] [2021-08-30 16:38:13,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762978883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:13,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621181635] [2021-08-30 16:38:13,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:38:13,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:13,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:13,965 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:38:13,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-30 16:38:14,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:14,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 181 conjunts are in the unsatisfiable core [2021-08-30 16:38:14,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:14,657 INFO L388 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 21 treesize of output 17 [2021-08-30 16:38:15,056 INFO L388 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 [2021-08-30 16:38:15,062 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 24 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:38:15,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:16,165 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:38:16,165 INFO L388 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 103 treesize of output 103 [2021-08-30 16:38:16,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-30 16:38:16,487 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 24 proven. 259 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-30 16:38:16,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621181635] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:16,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:16,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34, 34] total 81 [2021-08-30 16:38:16,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940234528] [2021-08-30 16:38:16,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-08-30 16:38:16,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:16,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-08-30 16:38:16,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6235, Unknown=0, NotChecked=0, Total=6480 [2021-08-30 16:38:16,489 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 81 states, 78 states have (on average 3.2051282051282053) internal successors, (250), 77 states have internal predecessors, (250), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:20,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:20,065 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2021-08-30 16:38:20,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-30 16:38:20,065 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 78 states have (on average 3.2051282051282053) internal successors, (250), 77 states have internal predecessors, (250), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2021-08-30 16:38:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:20,066 INFO L225 Difference]: With dead ends: 190 [2021-08-30 16:38:20,066 INFO L226 Difference]: Without dead ends: 138 [2021-08-30 16:38:20,067 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 209 SyntacticMatches, 4 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 3557.21ms TimeCoverageRelationStatistics Valid=501, Invalid=12155, Unknown=0, NotChecked=0, Total=12656 [2021-08-30 16:38:20,067 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 192 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 6465 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1813.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 6785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.27ms SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 6465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 2201.67ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:20,067 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 203 Invalid, 6785 Unknown, 0 Unchecked, 12.27ms Time], IncrementalHoareTripleChecker [60 Valid, 6465 Invalid, 0 Unknown, 260 Unchecked, 2201.67ms Time] [2021-08-30 16:38:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-30 16:38:20,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-08-30 16:38:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.031496062992126) internal successors, (131), 127 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:20,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2021-08-30 16:38:20,070 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 127 [2021-08-30 16:38:20,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:20,070 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2021-08-30 16:38:20,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 78 states have (on average 3.2051282051282053) internal successors, (250), 77 states have internal predecessors, (250), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:20,070 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2021-08-30 16:38:20,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-08-30 16:38:20,071 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:20,071 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:20,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-30 16:38:20,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-30 16:38:20,273 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:38:20,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:20,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1645665398, now seen corresponding path program 14 times [2021-08-30 16:38:20,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:20,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844637061] [2021-08-30 16:38:20,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:20,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:20,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:20,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 66 proven. 246 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-30 16:38:20,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:20,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844637061] [2021-08-30 16:38:20,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844637061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:20,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954253939] [2021-08-30 16:38:20,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:38:20,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:20,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:20,713 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:38:20,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-30 16:38:20,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:38:20,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:20,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 87 conjunts are in the unsatisfiable core [2021-08-30 16:38:20,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 91 proven. 221 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-30 16:38:21,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:21,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-08-30 16:38:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 91 proven. 221 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-30 16:38:22,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954253939] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:22,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:22,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 51 [2021-08-30 16:38:22,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630361376] [2021-08-30 16:38:22,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-30 16:38:22,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:22,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-30 16:38:22,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2385, Unknown=0, NotChecked=0, Total=2652 [2021-08-30 16:38:22,073 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 52 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:23,261 INFO L93 Difference]: Finished difference Result 139 states and 142 transitions. [2021-08-30 16:38:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-30 16:38:23,262 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2021-08-30 16:38:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:23,263 INFO L225 Difference]: With dead ends: 139 [2021-08-30 16:38:23,263 INFO L226 Difference]: Without dead ends: 139 [2021-08-30 16:38:23,263 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1244.24ms TimeCoverageRelationStatistics Valid=561, Invalid=4695, Unknown=0, NotChecked=0, Total=5256 [2021-08-30 16:38:23,264 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 223 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 583.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.28ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 709.39ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:23,264 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 71 Invalid, 2133 Unknown, 0 Unchecked, 4.28ms Time], IncrementalHoareTripleChecker [50 Valid, 2083 Invalid, 0 Unknown, 0 Unchecked, 709.39ms Time] [2021-08-30 16:38:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-30 16:38:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-08-30 16:38:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 133 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:23,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2021-08-30 16:38:23,267 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 131 [2021-08-30 16:38:23,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:23,267 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2021-08-30 16:38:23,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 48 states have (on average 4.145833333333333) internal successors, (199), 48 states have internal predecessors, (199), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:23,267 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2021-08-30 16:38:23,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-08-30 16:38:23,268 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:23,268 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:23,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:23,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-30 16:38:23,481 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:38:23,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:23,481 INFO L82 PathProgramCache]: Analyzing trace with hash -265684794, now seen corresponding path program 15 times [2021-08-30 16:38:23,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:23,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816719502] [2021-08-30 16:38:23,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:23,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:23,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 202 proven. 161 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-30 16:38:23,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:23,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816719502] [2021-08-30 16:38:23,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816719502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:23,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921567764] [2021-08-30 16:38:23,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:38:23,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:23,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:23,921 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:38:23,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-30 16:38:24,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-30 16:38:24,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:24,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-30 16:38:24,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:24,537 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-30 16:38:24,537 INFO L388 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-08-30 16:38:24,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-08-30 16:38:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 243 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-30 16:38:25,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 243 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-30 16:38:26,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921567764] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:26,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:26,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 60 [2021-08-30 16:38:26,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508317122] [2021-08-30 16:38:26,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-30 16:38:26,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:26,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-30 16:38:26,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=564, Invalid=2976, Unknown=0, NotChecked=0, Total=3540 [2021-08-30 16:38:26,243 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 60 states, 60 states have (on average 4.233333333333333) internal successors, (254), 56 states have internal predecessors, (254), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:26,924 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2021-08-30 16:38:26,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-30 16:38:26,924 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 4.233333333333333) internal successors, (254), 56 states have internal predecessors, (254), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2021-08-30 16:38:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:26,925 INFO L225 Difference]: With dead ends: 238 [2021-08-30 16:38:26,926 INFO L226 Difference]: Without dead ends: 145 [2021-08-30 16:38:26,926 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 1392.31ms TimeCoverageRelationStatistics Valid=854, Invalid=4548, Unknown=0, NotChecked=0, Total=5402 [2021-08-30 16:38:26,927 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 129 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 275.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.89ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 343.24ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:26,927 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 29 Invalid, 891 Unknown, 0 Unchecked, 1.89ms Time], IncrementalHoareTripleChecker [21 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 343.24ms Time] [2021-08-30 16:38:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-30 16:38:26,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2021-08-30 16:38:26,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 137 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2021-08-30 16:38:26,930 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 137 [2021-08-30 16:38:26,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:26,930 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2021-08-30 16:38:26,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 4.233333333333333) internal successors, (254), 56 states have internal predecessors, (254), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:26,931 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2021-08-30 16:38:26,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-08-30 16:38:26,931 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:26,931 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:26,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-30 16:38:27,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-30 16:38:27,137 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:38:27,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:27,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1432234313, now seen corresponding path program 16 times [2021-08-30 16:38:27,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:27,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557457708] [2021-08-30 16:38:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:27,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:28,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 27 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:28,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:28,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557457708] [2021-08-30 16:38:28,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557457708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:28,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527895018] [2021-08-30 16:38:28,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-30 16:38:28,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:28,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:28,133 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:38:28,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-30 16:38:28,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-30 16:38:28,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:28,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 177 conjunts are in the unsatisfiable core [2021-08-30 16:38:28,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:28,300 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:38:28,300 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 16:38:29,340 INFO L388 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 15 treesize of output 11 [2021-08-30 16:38:30,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-08-30 16:38:30,499 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-08-30 16:38:30,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 24 [2021-08-30 16:38:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 204 proven. 311 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:38:30,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:34,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:38:34,748 INFO L388 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 109 treesize of output 109 [2021-08-30 16:38:34,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-08-30 16:38:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 27 proven. 336 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-30 16:38:36,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527895018] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:36,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:36,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 38, 38] total 110 [2021-08-30 16:38:36,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820926951] [2021-08-30 16:38:36,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-08-30 16:38:36,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:36,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-08-30 16:38:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=11392, Unknown=1, NotChecked=0, Total=11990 [2021-08-30 16:38:36,459 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 110 states, 107 states have (on average 3.3738317757009346) internal successors, (361), 106 states have internal predecessors, (361), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:41,218 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2021-08-30 16:38:41,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-30 16:38:41,219 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 107 states have (on average 3.3738317757009346) internal successors, (361), 106 states have internal predecessors, (361), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2021-08-30 16:38:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:41,220 INFO L225 Difference]: With dead ends: 210 [2021-08-30 16:38:41,220 INFO L226 Difference]: Without dead ends: 152 [2021-08-30 16:38:41,221 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6087 ImplicationChecksByTransitivity, 9205.44ms TimeCoverageRelationStatistics Valid=1702, Invalid=25029, Unknown=1, NotChecked=0, Total=26732 [2021-08-30 16:38:41,222 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 496 mSDsluCounter, 1508 mSDsCounter, 0 mSdLazyCounter, 5597 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1616.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 7865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.64ms SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 5597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2175 IncrementalHoareTripleChecker+Unchecked, 1950.32ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:41,222 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 161 Invalid, 7865 Unknown, 0 Unchecked, 12.64ms Time], IncrementalHoareTripleChecker [93 Valid, 5597 Invalid, 0 Unknown, 2175 Unchecked, 1950.32ms Time] [2021-08-30 16:38:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-08-30 16:38:41,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2021-08-30 16:38:41,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0283687943262412) internal successors, (145), 141 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2021-08-30 16:38:41,225 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 141 [2021-08-30 16:38:41,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:41,225 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2021-08-30 16:38:41,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 107 states have (on average 3.3738317757009346) internal successors, (361), 106 states have internal predecessors, (361), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:41,226 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2021-08-30 16:38:41,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-08-30 16:38:41,226 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:41,227 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:41,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:41,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:41,441 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:38:41,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:41,441 INFO L82 PathProgramCache]: Analyzing trace with hash -527899764, now seen corresponding path program 17 times [2021-08-30 16:38:41,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:41,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268726077] [2021-08-30 16:38:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:41,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:41,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 91 proven. 305 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-30 16:38:41,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:41,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268726077] [2021-08-30 16:38:41,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268726077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:41,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113184834] [2021-08-30 16:38:41,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-30 16:38:41,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:41,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:41,914 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:38:41,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-30 16:38:42,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-30 16:38:42,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:42,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-30 16:38:42,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:42,295 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:38:42,296 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 16:38:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 120 proven. 276 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-30 16:38:43,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:45,023 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 153 proven. 243 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-30 16:38:45,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113184834] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:45,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:45,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 75 [2021-08-30 16:38:45,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859060476] [2021-08-30 16:38:45,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-08-30 16:38:45,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:45,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-08-30 16:38:45,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=5087, Unknown=0, NotChecked=0, Total=5700 [2021-08-30 16:38:45,025 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 76 states, 74 states have (on average 4.297297297297297) internal successors, (318), 72 states have internal predecessors, (318), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:46,528 INFO L93 Difference]: Finished difference Result 153 states and 156 transitions. [2021-08-30 16:38:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-30 16:38:46,529 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 74 states have (on average 4.297297297297297) internal successors, (318), 72 states have internal predecessors, (318), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2021-08-30 16:38:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:46,529 INFO L225 Difference]: With dead ends: 153 [2021-08-30 16:38:46,529 INFO L226 Difference]: Without dead ends: 153 [2021-08-30 16:38:46,530 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3087 ImplicationChecksByTransitivity, 2148.59ms TimeCoverageRelationStatistics Valid=976, Invalid=8726, Unknown=0, NotChecked=0, Total=9702 [2021-08-30 16:38:46,530 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 241 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 2440 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 694.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.82ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 843.93ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:46,531 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 65 Invalid, 2493 Unknown, 0 Unchecked, 4.82ms Time], IncrementalHoareTripleChecker [53 Valid, 2440 Invalid, 0 Unknown, 0 Unchecked, 843.93ms Time] [2021-08-30 16:38:46,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-30 16:38:46,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-08-30 16:38:46,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 147 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2021-08-30 16:38:46,533 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 145 [2021-08-30 16:38:46,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:46,534 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2021-08-30 16:38:46,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 74 states have (on average 4.297297297297297) internal successors, (318), 72 states have internal predecessors, (318), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2021-08-30 16:38:46,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-08-30 16:38:46,535 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:46,535 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:46,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:46,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-30 16:38:46,761 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:38:46,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:46,761 INFO L82 PathProgramCache]: Analyzing trace with hash 679728988, now seen corresponding path program 18 times [2021-08-30 16:38:46,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:46,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79979521] [2021-08-30 16:38:46,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:46,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:47,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 254 proven. 199 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-30 16:38:47,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:47,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79979521] [2021-08-30 16:38:47,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79979521] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:47,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956304390] [2021-08-30 16:38:47,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-30 16:38:47,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:47,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:47,200 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:38:47,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-30 16:38:48,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-30 16:38:48,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:38:48,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 100 conjunts are in the unsatisfiable core [2021-08-30 16:38:48,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:48,078 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:38:48,078 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 16:38:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 300 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:50,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:38:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 300 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:52,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956304390] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:38:52,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:38:52,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 36, 36] total 87 [2021-08-30 16:38:52,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016378402] [2021-08-30 16:38:52,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-30 16:38:52,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:38:52,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-30 16:38:52,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=986, Invalid=6496, Unknown=0, NotChecked=0, Total=7482 [2021-08-30 16:38:52,132 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 87 states, 87 states have (on average 3.9310344827586206) internal successors, (342), 83 states have internal predecessors, (342), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:53,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:38:53,626 INFO L93 Difference]: Finished difference Result 263 states and 268 transitions. [2021-08-30 16:38:53,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-30 16:38:53,626 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.9310344827586206) internal successors, (342), 83 states have internal predecessors, (342), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2021-08-30 16:38:53,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:38:53,627 INFO L225 Difference]: With dead ends: 263 [2021-08-30 16:38:53,627 INFO L226 Difference]: Without dead ends: 156 [2021-08-30 16:38:53,628 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4662 ImplicationChecksByTransitivity, 3150.10ms TimeCoverageRelationStatistics Valid=1948, Invalid=12814, Unknown=0, NotChecked=0, Total=14762 [2021-08-30 16:38:53,628 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 302.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.04ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 388.27ms IncrementalHoareTripleChecker+Time [2021-08-30 16:38:53,628 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 65 Invalid, 1179 Unknown, 0 Unchecked, 2.04ms Time], IncrementalHoareTripleChecker [10 Valid, 997 Invalid, 0 Unknown, 172 Unchecked, 388.27ms Time] [2021-08-30 16:38:53,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-30 16:38:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-08-30 16:38:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2021-08-30 16:38:53,631 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 151 [2021-08-30 16:38:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:38:53,632 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2021-08-30 16:38:53,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.9310344827586206) internal successors, (342), 83 states have internal predecessors, (342), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:38:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2021-08-30 16:38:53,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-08-30 16:38:53,633 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:38:53,633 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:38:53,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-30 16:38:53,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-30 16:38:53,834 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:38:53,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:38:53,834 INFO L82 PathProgramCache]: Analyzing trace with hash -2115279201, now seen corresponding path program 19 times [2021-08-30 16:38:53,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:38:53,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857241132] [2021-08-30 16:38:53,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:38:53,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:38:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:54,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:38:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 30 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:38:54,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:38:54,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857241132] [2021-08-30 16:38:54,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857241132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:38:54,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254985703] [2021-08-30 16:38:54,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-30 16:38:54,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:38:54,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:38:54,963 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:38:54,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-30 16:38:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:38:55,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 221 conjunts are in the unsatisfiable core [2021-08-30 16:38:55,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:38:56,140 INFO L388 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 21 treesize of output 17 [2021-08-30 16:38:58,621 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-08-30 16:38:58,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 30 [2021-08-30 16:38:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 30 proven. 612 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:38:58,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:00,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:39:00,430 INFO L388 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 109 treesize of output 109 [2021-08-30 16:39:00,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-30 16:39:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 30 proven. 423 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-30 16:39:01,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254985703] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:01,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:01,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42, 42] total 120 [2021-08-30 16:39:01,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119306305] [2021-08-30 16:39:01,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-08-30 16:39:01,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:01,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-08-30 16:39:01,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=446, Invalid=13834, Unknown=0, NotChecked=0, Total=14280 [2021-08-30 16:39:01,743 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 120 states, 117 states have (on average 3.3675213675213675) internal successors, (394), 116 states have internal predecessors, (394), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:05,873 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2021-08-30 16:39:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-30 16:39:05,877 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 117 states have (on average 3.3675213675213675) internal successors, (394), 116 states have internal predecessors, (394), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2021-08-30 16:39:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:05,878 INFO L225 Difference]: With dead ends: 230 [2021-08-30 16:39:05,879 INFO L226 Difference]: Without dead ends: 166 [2021-08-30 16:39:05,880 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6073 ImplicationChecksByTransitivity, 6693.45ms TimeCoverageRelationStatistics Valid=759, Invalid=22803, Unknown=0, NotChecked=0, Total=23562 [2021-08-30 16:39:05,880 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 141 mSDsluCounter, 1795 mSDsCounter, 0 mSdLazyCounter, 6178 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1767.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 7631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.91ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 6178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1396 IncrementalHoareTripleChecker+Unchecked, 2128.38ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:05,881 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 222 Invalid, 7631 Unknown, 0 Unchecked, 11.91ms Time], IncrementalHoareTripleChecker [57 Valid, 6178 Invalid, 0 Unknown, 1396 Unchecked, 2128.38ms Time] [2021-08-30 16:39:05,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-08-30 16:39:05,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-08-30 16:39:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:05,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2021-08-30 16:39:05,884 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 155 [2021-08-30 16:39:05,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:05,884 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2021-08-30 16:39:05,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 117 states have (on average 3.3675213675213675) internal successors, (394), 116 states have internal predecessors, (394), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:05,885 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2021-08-30 16:39:05,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-08-30 16:39:05,885 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:05,886 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:39:05,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-30 16:39:06,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-30 16:39:06,101 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:39:06,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:06,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1717497950, now seen corresponding path program 20 times [2021-08-30 16:39:06,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:06,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560673092] [2021-08-30 16:39:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:06,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:06,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 120 proven. 370 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-30 16:39:06,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:06,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560673092] [2021-08-30 16:39:06,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560673092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:06,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031891955] [2021-08-30 16:39:06,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-30 16:39:06,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:06,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:06,618 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:39:06,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-30 16:39:06,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-30 16:39:06,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:39:06,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 107 conjunts are in the unsatisfiable core [2021-08-30 16:39:06,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:39:06,779 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:39:06,779 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 16:39:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 153 proven. 337 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-30 16:39:08,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 190 proven. 300 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-30 16:39:09,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031891955] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:09,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:09,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 81 [2021-08-30 16:39:09,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28868] [2021-08-30 16:39:09,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-08-30 16:39:09,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:09,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-08-30 16:39:09,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=713, Invalid=5929, Unknown=0, NotChecked=0, Total=6642 [2021-08-30 16:39:09,822 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 82 states, 80 states have (on average 4.35) internal successors, (348), 78 states have internal predecessors, (348), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:11,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:11,938 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2021-08-30 16:39:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-30 16:39:11,939 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 80 states have (on average 4.35) internal successors, (348), 78 states have internal predecessors, (348), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2021-08-30 16:39:11,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:11,940 INFO L225 Difference]: With dead ends: 167 [2021-08-30 16:39:11,940 INFO L226 Difference]: Without dead ends: 167 [2021-08-30 16:39:11,941 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3668 ImplicationChecksByTransitivity, 2501.56ms TimeCoverageRelationStatistics Valid=1121, Invalid=10221, Unknown=0, NotChecked=0, Total=11342 [2021-08-30 16:39:11,941 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 317 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 3368 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1060.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 3434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.32ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 3368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1299.05ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:11,942 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 89 Invalid, 3434 Unknown, 0 Unchecked, 7.32ms Time], IncrementalHoareTripleChecker [66 Valid, 3368 Invalid, 0 Unknown, 0 Unchecked, 1299.05ms Time] [2021-08-30 16:39:11,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-08-30 16:39:11,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2021-08-30 16:39:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 161 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:11,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2021-08-30 16:39:11,945 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 159 [2021-08-30 16:39:11,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:11,945 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2021-08-30 16:39:11,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 80 states have (on average 4.35) internal successors, (348), 78 states have internal predecessors, (348), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2021-08-30 16:39:11,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-08-30 16:39:11,946 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:39:11,946 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:39:11,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-30 16:39:12,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:12,161 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-30 16:39:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:39:12,161 INFO L82 PathProgramCache]: Analyzing trace with hash -845931790, now seen corresponding path program 21 times [2021-08-30 16:39:12,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:39:12,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10536170] [2021-08-30 16:39:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:39:12,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:39:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:12,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:39:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:39:12,673 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 312 proven. 241 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-30 16:39:12,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:39:12,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10536170] [2021-08-30 16:39:12,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10536170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:39:12,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394462378] [2021-08-30 16:39:12,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-30 16:39:12,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:39:12,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:39:12,674 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-30 16:39:12,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-30 16:39:15,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-30 16:39:15,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-30 16:39:15,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 89 conjunts are in the unsatisfiable core [2021-08-30 16:39:15,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:39:15,831 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-30 16:39:15,832 INFO L388 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-08-30 16:39:16,194 INFO L388 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 23 treesize of output 19 [2021-08-30 16:39:16,982 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-08-30 16:39:16,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 46 [2021-08-30 16:39:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 40 proven. 43 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2021-08-30 16:39:17,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:39:25,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-30 16:39:25,044 INFO L388 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 118 treesize of output 118 [2021-08-30 16:39:25,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-08-30 16:39:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2021-08-30 16:39:25,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394462378] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:39:25,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:39:25,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12, 14] total 55 [2021-08-30 16:39:25,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552237285] [2021-08-30 16:39:25,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-30 16:39:25,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:39:25,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-30 16:39:25,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2695, Unknown=3, NotChecked=0, Total=2970 [2021-08-30 16:39:25,532 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand has 55 states, 53 states have (on average 3.6792452830188678) internal successors, (195), 51 states have internal predecessors, (195), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:39:28,385 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2021-08-30 16:39:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-30 16:39:28,385 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 3.6792452830188678) internal successors, (195), 51 states have internal predecessors, (195), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2021-08-30 16:39:28,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:39:28,385 INFO L225 Difference]: With dead ends: 285 [2021-08-30 16:39:28,385 INFO L226 Difference]: Without dead ends: 0 [2021-08-30 16:39:28,386 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 9769.80ms TimeCoverageRelationStatistics Valid=2155, Invalid=17582, Unknown=3, NotChecked=0, Total=19740 [2021-08-30 16:39:28,387 INFO L928 BasicCegarLoop]: 4 mSDtfsCounter, 56 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.40ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 181.10ms IncrementalHoareTripleChecker+Time [2021-08-30 16:39:28,387 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 86 Invalid, 704 Unknown, 0 Unchecked, 1.40ms Time], IncrementalHoareTripleChecker [4 Valid, 406 Invalid, 0 Unknown, 294 Unchecked, 181.10ms Time] [2021-08-30 16:39:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-30 16:39:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-30 16:39:28,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-30 16:39:28,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-30 16:39:28,388 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 165 [2021-08-30 16:39:28,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:39:28,388 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-30 16:39:28,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 3.6792452830188678) internal successors, (195), 51 states have internal predecessors, (195), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:39:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-30 16:39:28,389 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-30 16:39:28,391 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr0REQUIRES_VIOLATION (18 of 19 remaining) [2021-08-30 16:39:28,391 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr1REQUIRES_VIOLATION (17 of 19 remaining) [2021-08-30 16:39:28,392 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr2REQUIRES_VIOLATION (16 of 19 remaining) [2021-08-30 16:39:28,392 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr3REQUIRES_VIOLATION (15 of 19 remaining) [2021-08-30 16:39:28,392 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr4REQUIRES_VIOLATION (14 of 19 remaining) [2021-08-30 16:39:28,392 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr5REQUIRES_VIOLATION (13 of 19 remaining) [2021-08-30 16:39:28,392 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr6REQUIRES_VIOLATION (12 of 19 remaining) [2021-08-30 16:39:28,392 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr7REQUIRES_VIOLATION (11 of 19 remaining) [2021-08-30 16:39:28,392 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr8REQUIRES_VIOLATION (10 of 19 remaining) [2021-08-30 16:39:28,392 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr9REQUIRES_VIOLATION (9 of 19 remaining) [2021-08-30 16:39:28,393 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION (8 of 19 remaining) [2021-08-30 16:39:28,393 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION (7 of 19 remaining) [2021-08-30 16:39:28,393 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION (6 of 19 remaining) [2021-08-30 16:39:28,393 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION (5 of 19 remaining) [2021-08-30 16:39:28,393 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION (4 of 19 remaining) [2021-08-30 16:39:28,393 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION (3 of 19 remaining) [2021-08-30 16:39:28,393 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION (2 of 19 remaining) [2021-08-30 16:39:28,394 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION (1 of 19 remaining) [2021-08-30 16:39:28,394 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2021-08-30 16:39:28,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-30 16:39:28,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-30 16:39:28,600 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 16:39:28,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:39:28 BoogieIcfgContainer [2021-08-30 16:39:28,602 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 16:39:28,602 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 16:39:28,603 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 16:39:28,603 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 16:39:28,603 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:36:18" (3/4) ... [2021-08-30 16:39:28,605 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-30 16:39:28,613 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-30 16:39:28,613 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrcmp [2021-08-30 16:39:28,613 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-30 16:39:28,613 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-30 16:39:28,614 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-30 16:39:28,614 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-30 16:39:28,614 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-30 16:39:28,614 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-30 16:39:28,619 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-08-30 16:39:28,620 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-08-30 16:39:28,620 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 16:39:28,620 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-30 16:39:28,654 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 16:39:28,654 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 16:39:28,656 INFO L158 Benchmark]: Toolchain (without parser) took 191505.10ms. Allocated memory was 67.1MB in the beginning and 232.8MB in the end (delta: 165.7MB). Free memory was 46.1MB in the beginning and 126.1MB in the end (delta: -80.1MB). Peak memory consumption was 86.5MB. Max. memory is 16.1GB. [2021-08-30 16:39:28,657 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 67.1MB. Free memory was 47.6MB in the beginning and 47.6MB in the end (delta: 44.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 16:39:28,657 INFO L158 Benchmark]: CACSL2BoogieTranslator took 447.31ms. Allocated memory is still 67.1MB. Free memory was 46.0MB in the beginning and 44.3MB in the end (delta: 1.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-30 16:39:28,657 INFO L158 Benchmark]: Boogie Preprocessor took 54.23ms. Allocated memory is still 67.1MB. Free memory was 44.1MB in the beginning and 41.8MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:39:28,657 INFO L158 Benchmark]: RCFGBuilder took 448.05ms. Allocated memory is still 67.1MB. Free memory was 41.8MB in the beginning and 42.0MB in the end (delta: -233.9kB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. [2021-08-30 16:39:28,657 INFO L158 Benchmark]: TraceAbstraction took 190491.84ms. Allocated memory was 67.1MB in the beginning and 232.8MB in the end (delta: 165.7MB). Free memory was 41.7MB in the beginning and 130.0MB in the end (delta: -88.3MB). Peak memory consumption was 76.3MB. Max. memory is 16.1GB. [2021-08-30 16:39:28,658 INFO L158 Benchmark]: Witness Printer took 51.62ms. Allocated memory is still 232.8MB. Free memory was 130.0MB in the beginning and 126.1MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-30 16:39:28,658 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 67.1MB. Free memory was 47.6MB in the beginning and 47.6MB in the end (delta: 44.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 447.31ms. Allocated memory is still 67.1MB. Free memory was 46.0MB in the beginning and 44.3MB in the end (delta: 1.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.23ms. Allocated memory is still 67.1MB. Free memory was 44.1MB in the beginning and 41.8MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 448.05ms. Allocated memory is still 67.1MB. Free memory was 41.8MB in the beginning and 42.0MB in the end (delta: -233.9kB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. * TraceAbstraction took 190491.84ms. Allocated memory was 67.1MB in the beginning and 232.8MB in the end (delta: 165.7MB). Free memory was 41.7MB in the beginning and 130.0MB in the end (delta: -88.3MB). Peak memory consumption was 76.3MB. Max. memory is 16.1GB. * Witness Printer took 51.62ms. Allocated memory is still 232.8MB. Free memory was 130.0MB in the beginning and 126.1MB in the end (delta: 3.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 542]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 542]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 73 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 190423.96ms, OverallIterations: 52, TraceHistogramMax: 12, EmptinessCheckTime: 58.04ms, AutomataDifference: 71555.96ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 11.09ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6524 SdHoareTripleChecker+Valid, 22011.06ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6506 mSDsluCounter, 2953 SdHoareTripleChecker+Invalid, 18076.23ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 7894 IncrementalHoareTripleChecker+Unchecked, 12663 mSDsCounter, 1355 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 56823 IncrementalHoareTripleChecker+Invalid, 66072 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1355 mSolverCounterUnsat, 228 mSDtfsCounter, 56823 mSolverCounterSat, 169.25ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7288 GetRequests, 4739 SyntacticMatches, 42 SemanticMatches, 2507 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 57351 ImplicationChecksByTransitivity, 105435.37ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=51, InterpolantAutomatonStates: 1179, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 181.16ms AutomataMinimizationTime, 52 MinimizatonAttempts, 287 StatesRemovedByMinimization, 36 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 438.64ms SsaConstructionTime, 7243.30ms SatisfiabilityAnalysisTime, 101388.98ms InterpolantComputationTime, 5989 NumberOfCodeBlocks, 5916 NumberOfCodeBlocksAsserted, 175 NumberOfCheckSat, 8638 ConstructedInterpolants, 545 QuantifiedInterpolants, 110842 SizeOfPredicates, 802 NumberOfNonLiveVariables, 12680 ConjunctsInSsa, 2424 ConjunctsInUnsatCore, 117 InterpolantComputations, 20 PerfectInterpolantSequences, 10677/21943 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 - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-30 16:39:28,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...