./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec 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/cstrcmp-alloca-2.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 df3db790fa8159689a8da2e25598b93c123cddf7 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Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 04:41:44,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:41:44,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:41:44,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:41:44,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:41:44,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:41:44,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:41:44,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:41:44,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:41:44,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:41:44,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:41:44,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:41:44,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:41:44,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:41:44,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:41:44,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:41:44,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:41:44,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:41:44,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:41:44,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:41:44,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:41:44,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:41:44,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:41:44,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:41:44,787 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:41:44,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:41:44,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:41:44,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:41:44,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:41:44,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:41:44,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:41:44,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:41:44,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:41:44,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:41:44,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:41:44,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:41:44,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:41:44,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:41:44,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:41:44,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:41:44,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:41:44,797 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 04:41:44,826 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:41:44,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:41:44,827 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:41:44,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:41:44,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:41:44,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:41:44,829 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:41:44,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:41:44,829 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:41:44,829 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:41:44,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:41:44,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:41:44,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:41:44,830 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:41:44,831 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:41:44,831 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 04:41:44,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:41:44,831 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:41:44,831 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:41:44,831 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:41:44,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:41:44,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:41:44,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:41:44,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:41:44,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:41:44,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:41:44,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:41:44,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:41:44,832 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:41:44,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df3db790fa8159689a8da2e25598b93c123cddf7 [2021-08-27 04:41:45,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:41:45,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:41:45,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:41:45,124 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:41:45,124 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:41:45,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2021-08-27 04:41:45,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e23e62ed/d8c92301a6d341ee84d52fb27af076fa/FLAG7e2f4dd81 [2021-08-27 04:41:45,618 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:41:45,621 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2021-08-27 04:41:45,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e23e62ed/d8c92301a6d341ee84d52fb27af076fa/FLAG7e2f4dd81 [2021-08-27 04:41:45,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e23e62ed/d8c92301a6d341ee84d52fb27af076fa [2021-08-27 04:41:45,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:41:45,649 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:41:45,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:41:45,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:41:45,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:41:45,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:41:45" (1/1) ... [2021-08-27 04:41:45,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c0bd19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:45, skipping insertion in model container [2021-08-27 04:41:45,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:41:45" (1/1) ... [2021-08-27 04:41:45,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:41:45,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:41:45,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:41:45,944 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:41:45,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:41:45,993 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:41:45,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:45 WrapperNode [2021-08-27 04:41:45,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:41:45,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:41:45,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:41:45,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:41:46,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:45" (1/1) ... [2021-08-27 04:41:46,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:45" (1/1) ... [2021-08-27 04:41:46,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:45" (1/1) ... [2021-08-27 04:41:46,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:45" (1/1) ... [2021-08-27 04:41:46,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:45" (1/1) ... [2021-08-27 04:41:46,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:45" (1/1) ... [2021-08-27 04:41:46,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:45" (1/1) ... [2021-08-27 04:41:46,052 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:41:46,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:41:46,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:41:46,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:41:46,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:45" (1/1) ... [2021-08-27 04:41:46,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:41:46,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:46,116 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) [2021-08-27 04:41:46,130 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 [2021-08-27 04:41:46,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:41:46,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:41:46,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 04:41:46,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 04:41:46,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 04:41:46,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 04:41:46,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 04:41:46,145 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcmp [2021-08-27 04:41:46,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:41:46,145 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:41:46,145 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:41:46,145 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:41:46,145 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:41:46,146 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:41:46,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:41:46,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:41:46,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:41:46,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:41:46,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:41:46,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:41:46,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:41:46,146 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:41:46,147 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:41:46,147 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:41:46,147 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:41:46,147 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 04:41:46,147 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 04:41:46,147 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 04:41:46,147 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 04:41:46,147 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 04:41:46,147 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:41:46,148 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:41:46,148 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:41:46,148 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:41:46,148 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:41:46,148 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:41:46,148 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:41:46,148 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:41:46,148 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:41:46,148 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:41:46,149 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:41:46,149 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:41:46,149 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:41:46,149 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:41:46,149 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:41:46,149 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:41:46,149 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:41:46,149 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:41:46,150 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:41:46,150 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:41:46,150 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:41:46,150 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:41:46,150 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:41:46,150 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:41:46,150 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:41:46,150 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:41:46,151 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:41:46,157 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:41:46,157 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:41:46,157 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:41:46,158 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:41:46,158 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:41:46,158 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:41:46,158 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:41:46,158 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:41:46,158 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:41:46,158 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:41:46,158 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:41:46,159 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:41:46,159 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:41:46,159 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:41:46,159 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:41:46,159 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:41:46,159 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:41:46,159 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:41:46,159 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:41:46,160 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:41:46,160 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:41:46,160 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:41:46,160 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:41:46,160 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:41:46,160 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:41:46,160 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:41:46,160 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:41:46,160 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:41:46,161 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:41:46,161 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:41:46,161 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:41:46,161 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:41:46,161 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:41:46,161 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:41:46,161 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:41:46,161 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:41:46,161 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:41:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:41:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:41:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:41:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:41:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:41:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:41:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:41:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:41:46,162 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:41:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:41:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:41:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:41:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:41:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:41:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:41:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:41:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:41:46,163 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:41:46,164 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:41:46,164 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:41:46,164 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:41:46,164 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:41:46,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:41:46,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-27 04:41:46,164 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcmp [2021-08-27 04:41:46,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:41:46,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:41:46,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:41:46,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:41:46,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:41:46,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:41:46,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:41:46,483 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:41:46,483 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-27 04:41:46,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:41:46 BoogieIcfgContainer [2021-08-27 04:41:46,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:41:46,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:41:46,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:41:46,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:41:46,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:41:45" (1/3) ... [2021-08-27 04:41:46,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c35c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:41:46, skipping insertion in model container [2021-08-27 04:41:46,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:41:45" (2/3) ... [2021-08-27 04:41:46,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71c35c42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:41:46, skipping insertion in model container [2021-08-27 04:41:46,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:41:46" (3/3) ... [2021-08-27 04:41:46,490 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcmp-alloca-2.i [2021-08-27 04:41:46,494 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:41:46,494 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-08-27 04:41:46,520 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:41:46,524 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 [2021-08-27 04:41:46,525 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-08-27 04:41:46,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 54 states have internal predecessors, (64), 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) [2021-08-27 04:41:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:41:46,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:46,539 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:46,540 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:46,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:46,543 INFO L82 PathProgramCache]: Analyzing trace with hash 903973826, now seen corresponding path program 1 times [2021-08-27 04:41:46,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:46,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848978175] [2021-08-27 04:41:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:46,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:46,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:46,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:46,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848978175] [2021-08-27 04:41:46,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848978175] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:46,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:46,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:41:46,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797562071] [2021-08-27 04:41:46,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:46,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:46,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:46,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:46,759 INFO L87 Difference]: Start difference. First operand has 61 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 54 states have internal predecessors, (64), 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 5 states, 5 states have (on average 1.6) 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) [2021-08-27 04:41:46,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:46,963 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-08-27 04:41:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:46,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) 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 [2021-08-27 04:41:46,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:46,975 INFO L225 Difference]: With dead ends: 82 [2021-08-27 04:41:46,976 INFO L226 Difference]: Without dead ends: 78 [2021-08-27 04:41:46,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:41:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-27 04:41:47,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2021-08-27 04:41:47,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 55 states have internal predecessors, (63), 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) [2021-08-27 04:41:47,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-08-27 04:41:47,006 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 11 [2021-08-27 04:41:47,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:47,007 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-08-27 04:41:47,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) 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) [2021-08-27 04:41:47,007 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-08-27 04:41:47,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:41:47,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:47,008 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:47,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:41:47,008 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:47,009 INFO L82 PathProgramCache]: Analyzing trace with hash 905820868, now seen corresponding path program 1 times [2021-08-27 04:41:47,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:47,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393156789] [2021-08-27 04:41:47,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:47,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:47,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:47,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393156789] [2021-08-27 04:41:47,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393156789] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:47,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:47,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:41:47,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168545658] [2021-08-27 04:41:47,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:41:47,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:41:47,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:47,114 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. 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) [2021-08-27 04:41:47,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:47,193 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-08-27 04:41:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:41:47,194 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 [2021-08-27 04:41:47,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:47,195 INFO L225 Difference]: With dead ends: 59 [2021-08-27 04:41:47,195 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 04:41:47,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 04:41:47,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-27 04:41:47,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 53 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) [2021-08-27 04:41:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-08-27 04:41:47,199 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 11 [2021-08-27 04:41:47,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:47,200 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-08-27 04:41:47,200 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) [2021-08-27 04:41:47,200 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-08-27 04:41:47,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 04:41:47,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:47,200 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:47,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:41:47,201 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:47,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:47,201 INFO L82 PathProgramCache]: Analyzing trace with hash 905820869, now seen corresponding path program 1 times [2021-08-27 04:41:47,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:47,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658989217] [2021-08-27 04:41:47,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:47,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:47,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:47,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658989217] [2021-08-27 04:41:47,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658989217] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:47,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:47,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:47,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138186699] [2021-08-27 04:41:47,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:47,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:47,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:47,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:47,264 INFO L87 Difference]: Start difference. First operand 59 states and 66 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) [2021-08-27 04:41:47,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:47,384 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-08-27 04:41:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:41:47,387 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 [2021-08-27 04:41:47,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:47,388 INFO L225 Difference]: With dead ends: 79 [2021-08-27 04:41:47,388 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 04:41:47,388 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:47,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 04:41:47,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-08-27 04:41:47,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.641025641025641) internal successors, (64), 55 states have internal predecessors, (64), 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) [2021-08-27 04:41:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-08-27 04:41:47,398 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 11 [2021-08-27 04:41:47,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:47,398 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-08-27 04:41:47,398 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) [2021-08-27 04:41:47,398 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-08-27 04:41:47,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:41:47,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:47,399 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:47,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:41:47,399 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:47,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:47,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1135404026, now seen corresponding path program 1 times [2021-08-27 04:41:47,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:47,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209203371] [2021-08-27 04:41:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:47,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:47,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:47,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209203371] [2021-08-27 04:41:47,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209203371] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:47,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:47,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:47,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498167625] [2021-08-27 04:41:47,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:47,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:47,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:47,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:47,447 INFO L87 Difference]: Start difference. First operand 61 states and 69 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) [2021-08-27 04:41:47,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:47,539 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-08-27 04:41:47,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:41:47,540 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 [2021-08-27 04:41:47,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:47,540 INFO L225 Difference]: With dead ends: 60 [2021-08-27 04:41:47,540 INFO L226 Difference]: Without dead ends: 60 [2021-08-27 04:41:47,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:47,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-27 04:41:47,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-27 04:41:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 54 states have internal predecessors, (63), 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) [2021-08-27 04:41:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-08-27 04:41:47,544 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 13 [2021-08-27 04:41:47,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:47,544 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-08-27 04:41:47,544 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) [2021-08-27 04:41:47,544 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-08-27 04:41:47,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:41:47,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:47,545 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:47,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:41:47,545 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:47,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:47,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1135404079, now seen corresponding path program 1 times [2021-08-27 04:41:47,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:47,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698687889] [2021-08-27 04:41:47,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:47,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:47,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:47,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698687889] [2021-08-27 04:41:47,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698687889] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:47,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:47,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:41:47,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871400023] [2021-08-27 04:41:47,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:41:47,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:47,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:41:47,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:47,612 INFO L87 Difference]: Start difference. First operand 60 states and 68 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) [2021-08-27 04:41:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:47,746 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-08-27 04:41:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:47,746 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 [2021-08-27 04:41:47,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:47,747 INFO L225 Difference]: With dead ends: 73 [2021-08-27 04:41:47,747 INFO L226 Difference]: Without dead ends: 73 [2021-08-27 04:41:47,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:41:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-27 04:41:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2021-08-27 04:41:47,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.6341463414634145) 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) [2021-08-27 04:41:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-08-27 04:41:47,751 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 13 [2021-08-27 04:41:47,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:47,752 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-08-27 04:41:47,752 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) [2021-08-27 04:41:47,752 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-08-27 04:41:47,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 04:41:47,753 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:47,753 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:47,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 04:41:47,753 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:47,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:47,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1135404078, now seen corresponding path program 1 times [2021-08-27 04:41:47,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:47,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095495544] [2021-08-27 04:41:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:47,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:47,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:47,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095495544] [2021-08-27 04:41:47,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095495544] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:47,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:47,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:41:47,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538350857] [2021-08-27 04:41:47,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:41:47,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:47,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:41:47,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:47,783 INFO L87 Difference]: Start difference. First operand 62 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) [2021-08-27 04:41:47,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:47,859 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2021-08-27 04:41:47,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:41:47,861 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 [2021-08-27 04:41:47,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:47,861 INFO L225 Difference]: With dead ends: 60 [2021-08-27 04:41:47,861 INFO L226 Difference]: Without dead ends: 60 [2021-08-27 04:41:47,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:47,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-27 04:41:47,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-27 04:41:47,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 54 states have internal predecessors, (64), 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) [2021-08-27 04:41:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-08-27 04:41:47,864 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 13 [2021-08-27 04:41:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:47,865 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-08-27 04:41:47,865 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) [2021-08-27 04:41:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-08-27 04:41:47,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 04:41:47,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:47,866 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:47,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 04:41:47,866 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr7REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:47,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:47,867 INFO L82 PathProgramCache]: Analyzing trace with hash 837786484, now seen corresponding path program 1 times [2021-08-27 04:41:47,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:47,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53824053] [2021-08-27 04:41:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:47,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:47,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:47,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53824053] [2021-08-27 04:41:47,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53824053] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:47,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:47,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:47,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226981348] [2021-08-27 04:41:47,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:47,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:47,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:47,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:47,911 INFO L87 Difference]: Start difference. First operand 60 states and 69 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) [2021-08-27 04:41:47,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:47,979 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-08-27 04:41:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:41:47,980 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 [2021-08-27 04:41:47,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:47,981 INFO L225 Difference]: With dead ends: 59 [2021-08-27 04:41:47,981 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 04:41:47,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:47,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 04:41:47,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-27 04:41:47,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 53 states have internal predecessors, (63), 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) [2021-08-27 04:41:47,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2021-08-27 04:41:47,984 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 14 [2021-08-27 04:41:47,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:47,984 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2021-08-27 04:41:47,984 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) [2021-08-27 04:41:47,984 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2021-08-27 04:41:47,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:41:47,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:47,985 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:47,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 04:41:47,985 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:47,986 INFO L82 PathProgramCache]: Analyzing trace with hash 930202632, now seen corresponding path program 1 times [2021-08-27 04:41:47,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:47,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593748581] [2021-08-27 04:41:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:47,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:48,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:48,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:48,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593748581] [2021-08-27 04:41:48,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593748581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:48,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132166864] [2021-08-27 04:41:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:48,053 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:48,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:48,069 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) [2021-08-27 04:41:48,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 04:41:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:48,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 04:41:48,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:48,312 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:41:48,313 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 [2021-08-27 04:41:48,324 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 [2021-08-27 04:41:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:48,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132166864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:48,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:48,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 04:41:48,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991548349] [2021-08-27 04:41:48,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:41:48,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:48,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:41:48,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:41:48,437 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-08-27 04:41:48,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:48,591 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-08-27 04:41:48,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:48,592 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 [2021-08-27 04:41:48,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:48,592 INFO L225 Difference]: With dead ends: 74 [2021-08-27 04:41:48,592 INFO L226 Difference]: Without dead ends: 74 [2021-08-27 04:41:48,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:48,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-27 04:41:48,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2021-08-27 04:41:48,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.5128205128205128) 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) [2021-08-27 04:41:48,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-08-27 04:41:48,595 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 15 [2021-08-27 04:41:48,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:48,595 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-08-27 04:41:48,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-08-27 04:41:48,596 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-08-27 04:41:48,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:41:48,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:48,596 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:48,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-27 04:41:48,812 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 [2021-08-27 04:41:48,812 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrcmpErr0REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:48,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:48,813 INFO L82 PathProgramCache]: Analyzing trace with hash 442243660, now seen corresponding path program 1 times [2021-08-27 04:41:48,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:48,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906148574] [2021-08-27 04:41:48,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:48,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:48,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:48,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:48,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:48,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906148574] [2021-08-27 04:41:48,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906148574] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:48,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:48,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:41:48,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533661943] [2021-08-27 04:41:48,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:41:48,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:48,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:41:48,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:48,852 INFO L87 Difference]: Start difference. First operand 56 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) [2021-08-27 04:41:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:48,957 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-08-27 04:41:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:48,957 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 [2021-08-27 04:41:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:48,958 INFO L225 Difference]: With dead ends: 53 [2021-08-27 04:41:48,958 INFO L226 Difference]: Without dead ends: 53 [2021-08-27 04:41:48,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-27 04:41:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-08-27 04:41:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.435897435897436) internal successors, (56), 47 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) [2021-08-27 04:41:48,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-08-27 04:41:48,960 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 17 [2021-08-27 04:41:48,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:48,961 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-08-27 04:41:48,961 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) [2021-08-27 04:41:48,961 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-08-27 04:41:48,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:41:48,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:48,962 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:48,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 04:41:48,962 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:48,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:48,962 INFO L82 PathProgramCache]: Analyzing trace with hash 442243661, now seen corresponding path program 1 times [2021-08-27 04:41:48,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:48,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096092817] [2021-08-27 04:41:48,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:48,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:48,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:49,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:49,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096092817] [2021-08-27 04:41:49,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096092817] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:49,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:49,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:41:49,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140372041] [2021-08-27 04:41:49,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:41:49,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:49,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:41:49,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:49,034 INFO L87 Difference]: Start difference. First operand 53 states and 61 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) [2021-08-27 04:41:49,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:49,225 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2021-08-27 04:41:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:41:49,226 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 [2021-08-27 04:41:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:49,229 INFO L225 Difference]: With dead ends: 72 [2021-08-27 04:41:49,229 INFO L226 Difference]: Without dead ends: 72 [2021-08-27 04:41:49,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:41:49,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-27 04:41:49,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2021-08-27 04:41:49,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.446808510638298) internal successors, (68), 55 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) [2021-08-27 04:41:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-08-27 04:41:49,244 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 17 [2021-08-27 04:41:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:49,245 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-08-27 04:41:49,245 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) [2021-08-27 04:41:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-08-27 04:41:49,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 04:41:49,248 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:49,248 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:49,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 04:41:49,248 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:49,249 INFO L82 PathProgramCache]: Analyzing trace with hash 490904818, now seen corresponding path program 1 times [2021-08-27 04:41:49,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:49,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667085420] [2021-08-27 04:41:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:49,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:49,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:49,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:49,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667085420] [2021-08-27 04:41:49,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667085420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:49,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769263443] [2021-08-27 04:41:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:49,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:49,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:49,361 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) [2021-08-27 04:41:49,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 04:41:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:49,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 04:41:49,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:49,535 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:41:49,536 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 [2021-08-27 04:41:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:49,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769263443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:49,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:49,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-27 04:41:49,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273473440] [2021-08-27 04:41:49,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:41:49,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:49,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:41:49,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:49,645 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-08-27 04:41:49,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:49,775 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-08-27 04:41:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:41:49,776 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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 [2021-08-27 04:41:49,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:49,776 INFO L225 Difference]: With dead ends: 68 [2021-08-27 04:41:49,776 INFO L226 Difference]: Without dead ends: 68 [2021-08-27 04:41:49,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-27 04:41:49,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-27 04:41:49,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-08-27 04:41:49,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 52 states have internal predecessors, (64), 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) [2021-08-27 04:41:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-08-27 04:41:49,779 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 17 [2021-08-27 04:41:49,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:49,779 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-08-27 04:41:49,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 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) [2021-08-27 04:41:49,779 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-08-27 04:41:49,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:41:49,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:49,780 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:49,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-27 04:41:49,998 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 [2021-08-27 04:41:49,998 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:49,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:49,999 INFO L82 PathProgramCache]: Analyzing trace with hash -18493692, now seen corresponding path program 1 times [2021-08-27 04:41:49,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:49,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328528182] [2021-08-27 04:41:49,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:49,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:50,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:50,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328528182] [2021-08-27 04:41:50,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328528182] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:50,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:50,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:50,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576952157] [2021-08-27 04:41:50,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:41:50,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:50,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:41:50,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:41:50,043 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-08-27 04:41:50,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:50,108 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-08-27 04:41:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:41:50,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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 21 [2021-08-27 04:41:50,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:50,109 INFO L225 Difference]: With dead ends: 60 [2021-08-27 04:41:50,110 INFO L226 Difference]: Without dead ends: 60 [2021-08-27 04:41:50,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:50,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-27 04:41:50,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-27 04:41:50,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 54 states have internal predecessors, (66), 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) [2021-08-27 04:41:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-08-27 04:41:50,113 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 21 [2021-08-27 04:41:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:50,113 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-08-27 04:41:50,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 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) [2021-08-27 04:41:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-08-27 04:41:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:41:50,114 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:50,114 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:50,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 04:41:50,114 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrcmpErr4REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:50,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:50,115 INFO L82 PathProgramCache]: Analyzing trace with hash -18502766, now seen corresponding path program 1 times [2021-08-27 04:41:50,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:50,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138790231] [2021-08-27 04:41:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:50,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:50,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:50,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138790231] [2021-08-27 04:41:50,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138790231] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:50,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:50,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:41:50,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428744356] [2021-08-27 04:41:50,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:41:50,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:50,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:41:50,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:41:50,170 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 6 states, 4 states have (on average 4.25) internal successors, (17), 4 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) [2021-08-27 04:41:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:50,249 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-08-27 04:41:50,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:41:50,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 4 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 [2021-08-27 04:41:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:50,250 INFO L225 Difference]: With dead ends: 58 [2021-08-27 04:41:50,250 INFO L226 Difference]: Without dead ends: 58 [2021-08-27 04:41:50,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:50,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-27 04:41:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-08-27 04:41:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 52 states have internal predecessors, (63), 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) [2021-08-27 04:41:50,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-08-27 04:41:50,254 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 21 [2021-08-27 04:41:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:50,255 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-08-27 04:41:50,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 4 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) [2021-08-27 04:41:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-08-27 04:41:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:41:50,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:50,256 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:41:50,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 04:41:50,257 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:50,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:50,257 INFO L82 PathProgramCache]: Analyzing trace with hash -18502765, now seen corresponding path program 1 times [2021-08-27 04:41:50,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:50,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411258662] [2021-08-27 04:41:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:50,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:50,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:50,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411258662] [2021-08-27 04:41:50,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411258662] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:50,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:50,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 04:41:50,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382908810] [2021-08-27 04:41:50,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 04:41:50,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:50,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 04:41:50,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:41:50,340 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) 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) [2021-08-27 04:41:50,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:50,499 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2021-08-27 04:41:50,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 04:41:50,499 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) 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 [2021-08-27 04:41:50,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:50,500 INFO L225 Difference]: With dead ends: 65 [2021-08-27 04:41:50,500 INFO L226 Difference]: Without dead ends: 65 [2021-08-27 04:41:50,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-27 04:41:50,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-27 04:41:50,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2021-08-27 04:41:50,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 54 states have internal predecessors, (64), 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) [2021-08-27 04:41:50,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-08-27 04:41:50,502 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 21 [2021-08-27 04:41:50,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:50,502 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-08-27 04:41:50,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) 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) [2021-08-27 04:41:50,503 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-08-27 04:41:50,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-27 04:41:50,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:50,503 INFO L512 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] [2021-08-27 04:41:50,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 04:41:50,504 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:50,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:50,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1460095726, now seen corresponding path program 1 times [2021-08-27 04:41:50,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:50,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384882042] [2021-08-27 04:41:50,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:50,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:50,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:50,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:50,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384882042] [2021-08-27 04:41:50,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384882042] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:50,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:50,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-08-27 04:41:50,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330837009] [2021-08-27 04:41:50,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-27 04:41:50,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:50,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-27 04:41:50,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-27 04:41:50,696 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 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) [2021-08-27 04:41:51,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:51,146 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2021-08-27 04:41:51,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 04:41:51,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 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 24 [2021-08-27 04:41:51,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:51,148 INFO L225 Difference]: With dead ends: 95 [2021-08-27 04:41:51,148 INFO L226 Difference]: Without dead ends: 95 [2021-08-27 04:41:51,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:41:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-08-27 04:41:51,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2021-08-27 04:41:51,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 73 states have internal predecessors, (85), 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) [2021-08-27 04:41:51,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2021-08-27 04:41:51,150 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 24 [2021-08-27 04:41:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:51,151 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2021-08-27 04:41:51,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 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) [2021-08-27 04:41:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2021-08-27 04:41:51,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 04:41:51,151 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:51,152 INFO L512 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, 1] [2021-08-27 04:41:51,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-27 04:41:51,152 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:51,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:51,152 INFO L82 PathProgramCache]: Analyzing trace with hash -76483473, now seen corresponding path program 1 times [2021-08-27 04:41:51,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:51,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913865723] [2021-08-27 04:41:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:51,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:41:51,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:51,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913865723] [2021-08-27 04:41:51,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913865723] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:51,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:51,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 04:41:51,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76386501] [2021-08-27 04:41:51,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 04:41:51,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:51,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 04:41:51,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-08-27 04:41:51,284 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 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) [2021-08-27 04:41:51,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:51,507 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2021-08-27 04:41:51,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:41:51,507 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 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 28 [2021-08-27 04:41:51,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:51,508 INFO L225 Difference]: With dead ends: 122 [2021-08-27 04:41:51,508 INFO L226 Difference]: Without dead ends: 122 [2021-08-27 04:41:51,509 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-27 04:41:51,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-27 04:41:51,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2021-08-27 04:41:51,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 93 states have internal predecessors, (106), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 04:41:51,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2021-08-27 04:41:51,511 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 28 [2021-08-27 04:41:51,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:51,512 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2021-08-27 04:41:51,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 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) [2021-08-27 04:41:51,512 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2021-08-27 04:41:51,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 04:41:51,512 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:51,513 INFO L512 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, 1] [2021-08-27 04:41:51,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 04:41:51,513 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:51,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:51,513 INFO L82 PathProgramCache]: Analyzing trace with hash 142371245, now seen corresponding path program 1 times [2021-08-27 04:41:51,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:51,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590962526] [2021-08-27 04:41:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:51,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:41:51,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:51,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590962526] [2021-08-27 04:41:51,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590962526] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:51,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:51,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 04:41:51,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112300099] [2021-08-27 04:41:51,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 04:41:51,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:51,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 04:41:51,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:41:51,658 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 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) [2021-08-27 04:41:51,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:51,884 INFO L93 Difference]: Finished difference Result 147 states and 165 transitions. [2021-08-27 04:41:51,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:41:51,884 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 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 28 [2021-08-27 04:41:51,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:51,885 INFO L225 Difference]: With dead ends: 147 [2021-08-27 04:41:51,885 INFO L226 Difference]: Without dead ends: 147 [2021-08-27 04:41:51,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-27 04:41:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-08-27 04:41:51,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 102. [2021-08-27 04:41:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 94 states have internal predecessors, (108), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 04:41:51,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2021-08-27 04:41:51,888 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 28 [2021-08-27 04:41:51,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:51,888 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2021-08-27 04:41:51,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 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) [2021-08-27 04:41:51,889 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2021-08-27 04:41:51,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 04:41:51,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:51,889 INFO L512 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, 1, 1, 1] [2021-08-27 04:41:51,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-27 04:41:51,890 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:51,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1893037799, now seen corresponding path program 1 times [2021-08-27 04:41:51,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:51,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912192661] [2021-08-27 04:41:51,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:51,891 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:51,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:41:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:52,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:52,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912192661] [2021-08-27 04:41:52,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912192661] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:52,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:52,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-08-27 04:41:52,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071172603] [2021-08-27 04:41:52,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-27 04:41:52,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:52,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-27 04:41:52,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-27 04:41:52,137 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:52,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:52,565 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2021-08-27 04:41:52,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 04:41:52,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-08-27 04:41:52,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:52,566 INFO L225 Difference]: With dead ends: 146 [2021-08-27 04:41:52,566 INFO L226 Difference]: Without dead ends: 143 [2021-08-27 04:41:52,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:41:52,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-27 04:41:52,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2021-08-27 04:41:52,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 107 states have internal predecessors, (120), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 04:41:52,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2021-08-27 04:41:52,571 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 30 [2021-08-27 04:41:52,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:52,571 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2021-08-27 04:41:52,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 04:41:52,572 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2021-08-27 04:41:52,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-27 04:41:52,573 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:52,573 INFO L512 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, 1, 1, 1] [2021-08-27 04:41:52,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-27 04:41:52,573 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:52,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:52,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1835779497, now seen corresponding path program 1 times [2021-08-27 04:41:52,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:52,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524047034] [2021-08-27 04:41:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:52,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 04:41:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:41:52,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:52,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524047034] [2021-08-27 04:41:52,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524047034] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:41:52,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:41:52,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:41:52,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922775715] [2021-08-27 04:41:52,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:41:52,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:52,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:41:52,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:52,638 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-08-27 04:41:52,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:52,685 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2021-08-27 04:41:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:41:52,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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 30 [2021-08-27 04:41:52,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:52,686 INFO L225 Difference]: With dead ends: 114 [2021-08-27 04:41:52,686 INFO L226 Difference]: Without dead ends: 47 [2021-08-27 04:41:52,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:41:52,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-27 04:41:52,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-08-27 04:41:52,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.236842105263158) internal successors, (47), 42 states have internal predecessors, (47), 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) [2021-08-27 04:41:52,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-08-27 04:41:52,688 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 30 [2021-08-27 04:41:52,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:52,688 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-08-27 04:41:52,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 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) [2021-08-27 04:41:52,688 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-08-27 04:41:52,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 04:41:52,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:52,689 INFO L512 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, 1, 1, 1, 1, 1] [2021-08-27 04:41:52,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-27 04:41:52,689 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:52,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:52,690 INFO L82 PathProgramCache]: Analyzing trace with hash 816426698, now seen corresponding path program 1 times [2021-08-27 04:41:52,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:52,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804473117] [2021-08-27 04:41:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:52,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:41:52,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:52,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804473117] [2021-08-27 04:41:52,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804473117] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:52,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958801356] [2021-08-27 04:41:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:52,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:52,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:52,793 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) [2021-08-27 04:41:52,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 04:41:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:52,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-27 04:41:52,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:53,011 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:41:53,012 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 [2021-08-27 04:41:53,018 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 [2021-08-27 04:41:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:41:53,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958801356] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:53,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:53,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-08-27 04:41:53,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565044083] [2021-08-27 04:41:53,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 04:41:53,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:53,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 04:41:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-27 04:41:53,247 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-08-27 04:41:53,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:53,485 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2021-08-27 04:41:53,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:41:53,486 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 12 states have internal predecessors, (47), 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 32 [2021-08-27 04:41:53,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:53,486 INFO L225 Difference]: With dead ends: 63 [2021-08-27 04:41:53,486 INFO L226 Difference]: Without dead ends: 63 [2021-08-27 04:41:53,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:41:53,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-27 04:41:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-08-27 04:41:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 51 states have internal predecessors, (59), 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) [2021-08-27 04:41:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-08-27 04:41:53,488 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 32 [2021-08-27 04:41:53,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:53,489 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-08-27 04:41:53,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 12 states have internal predecessors, (47), 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) [2021-08-27 04:41:53,489 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-08-27 04:41:53,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-27 04:41:53,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:53,489 INFO L512 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, 1] [2021-08-27 04:41:53,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-27 04:41:53,696 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 [2021-08-27 04:41:53,696 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:53,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:53,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1395308944, now seen corresponding path program 1 times [2021-08-27 04:41:53,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:53,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474962080] [2021-08-27 04:41:53,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:53,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:53,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:41:53,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:53,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474962080] [2021-08-27 04:41:53,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474962080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:53,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227629678] [2021-08-27 04:41:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:53,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:53,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:53,859 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) [2021-08-27 04:41:53,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 04:41:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:54,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-27 04:41:54,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:41:54,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227629678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:54,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:54,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-08-27 04:41:54,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547315313] [2021-08-27 04:41:54,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-27 04:41:54,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:54,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-27 04:41:54,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-27 04:41:54,198 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 17 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 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) [2021-08-27 04:41:54,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:54,384 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-08-27 04:41:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:41:54,385 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 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 36 [2021-08-27 04:41:54,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:54,385 INFO L225 Difference]: With dead ends: 61 [2021-08-27 04:41:54,385 INFO L226 Difference]: Without dead ends: 57 [2021-08-27 04:41:54,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-08-27 04:41:54,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-27 04:41:54,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-08-27 04:41:54,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2) internal successors, (54), 49 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) [2021-08-27 04:41:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-08-27 04:41:54,387 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 36 [2021-08-27 04:41:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:54,388 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-08-27 04:41:54,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 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) [2021-08-27 04:41:54,388 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-08-27 04:41:54,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 04:41:54,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:54,388 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-08-27 04:41:54,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 04:41:54,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:54,597 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:54,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:54,597 INFO L82 PathProgramCache]: Analyzing trace with hash 955222517, now seen corresponding path program 2 times [2021-08-27 04:41:54,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:54,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100773371] [2021-08-27 04:41:54,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:54,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:54,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:41:54,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:54,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100773371] [2021-08-27 04:41:54,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100773371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:54,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8100922] [2021-08-27 04:41:54,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:41:54,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:54,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:54,861 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) [2021-08-27 04:41:54,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 04:41:55,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:41:55,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:41:55,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-27 04:41:55,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:55,181 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 [2021-08-27 04:41:55,645 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-08-27 04:41:55,645 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 32 [2021-08-27 04:41:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:41:55,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8100922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:55,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:55,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-08-27 04:41:55,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674155748] [2021-08-27 04:41:55,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-27 04:41:55,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:55,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-27 04:41:55,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:41:55,697 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 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) [2021-08-27 04:41:56,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:56,908 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2021-08-27 04:41:56,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-27 04:41:56,909 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 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 39 [2021-08-27 04:41:56,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:56,910 INFO L225 Difference]: With dead ends: 127 [2021-08-27 04:41:56,910 INFO L226 Difference]: Without dead ends: 68 [2021-08-27 04:41:56,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1215.2ms TimeCoverageRelationStatistics Valid=346, Invalid=2734, Unknown=0, NotChecked=0, Total=3080 [2021-08-27 04:41:56,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-27 04:41:56,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2021-08-27 04:41:56,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.169811320754717) internal successors, (62), 57 states have internal predecessors, (62), 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) [2021-08-27 04:41:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-08-27 04:41:56,912 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 39 [2021-08-27 04:41:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:56,912 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-08-27 04:41:56,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 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) [2021-08-27 04:41:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-08-27 04:41:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 04:41:56,913 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:56,913 INFO L512 BasicCegarLoop]: trace histogram [2, 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] [2021-08-27 04:41:56,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-27 04:41:57,127 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,SelfDestructingSolverStorable21 [2021-08-27 04:41:57,127 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:57,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:57,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2015293125, now seen corresponding path program 3 times [2021-08-27 04:41:57,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:57,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961250771] [2021-08-27 04:41:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:57,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:57,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:41:57,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:57,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961250771] [2021-08-27 04:41:57,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961250771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:57,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555107457] [2021-08-27 04:41:57,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:41:57,233 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:57,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:57,234 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) [2021-08-27 04:41:57,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 04:41:57,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-27 04:41:57,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:41:57,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-27 04:41:57,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:57,490 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 04:41:57,490 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 [2021-08-27 04:41:57,493 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 [2021-08-27 04:41:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:41:57,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555107457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:57,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:57,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-08-27 04:41:57,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149689307] [2021-08-27 04:41:57,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:41:57,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:57,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:41:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:41:57,825 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 16 states have internal predecessors, (74), 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) [2021-08-27 04:41:58,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:58,219 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2021-08-27 04:41:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 04:41:58,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 16 states have internal predecessors, (74), 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 47 [2021-08-27 04:41:58,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:58,220 INFO L225 Difference]: With dead ends: 75 [2021-08-27 04:41:58,220 INFO L226 Difference]: Without dead ends: 75 [2021-08-27 04:41:58,221 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-08-27 04:41:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-27 04:41:58,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-08-27 04:41:58,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 66 states have internal predecessors, (74), 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) [2021-08-27 04:41:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-08-27 04:41:58,222 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 47 [2021-08-27 04:41:58,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:58,222 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-08-27 04:41:58,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 16 states have internal predecessors, (74), 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) [2021-08-27 04:41:58,223 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-08-27 04:41:58,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-27 04:41:58,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:58,223 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-27 04:41:58,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 04:41:58,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:58,441 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:58,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1575388287, now seen corresponding path program 2 times [2021-08-27 04:41:58,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:58,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805282750] [2021-08-27 04:41:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:58,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:58,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:41:58,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:58,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805282750] [2021-08-27 04:41:58,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805282750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:58,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175192161] [2021-08-27 04:41:58,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:41:58,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:58,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:58,585 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) [2021-08-27 04:41:58,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 04:41:58,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:41:58,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:41:58,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-27 04:41:58,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:41:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:41:59,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175192161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:59,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:41:59,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-27 04:41:59,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667177732] [2021-08-27 04:41:59,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 04:41:59,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:41:59,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 04:41:59,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-08-27 04:41:59,060 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 19 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 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) [2021-08-27 04:41:59,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:41:59,329 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2021-08-27 04:41:59,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 04:41:59,330 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 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 51 [2021-08-27 04:41:59,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:41:59,330 INFO L225 Difference]: With dead ends: 73 [2021-08-27 04:41:59,330 INFO L226 Difference]: Without dead ends: 69 [2021-08-27 04:41:59,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:41:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-27 04:41:59,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-08-27 04:41:59,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.15) internal successors, (69), 64 states have internal predecessors, (69), 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) [2021-08-27 04:41:59,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-08-27 04:41:59,332 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 51 [2021-08-27 04:41:59,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:41:59,332 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-08-27 04:41:59,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 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) [2021-08-27 04:41:59,333 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-08-27 04:41:59,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-27 04:41:59,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:41:59,333 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-08-27 04:41:59,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 04:41:59,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:59,551 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:41:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:41:59,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1284852124, now seen corresponding path program 4 times [2021-08-27 04:41:59,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:41:59,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794705343] [2021-08-27 04:41:59,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:41:59,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:41:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:59,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:41:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:41:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:41:59,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:41:59,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794705343] [2021-08-27 04:41:59,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794705343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:41:59,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739535558] [2021-08-27 04:41:59,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:41:59,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:41:59,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:41:59,743 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) [2021-08-27 04:41:59,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 04:42:00,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:42:00,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:00,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-27 04:42:00,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:00,068 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:00,068 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 [2021-08-27 04:42:00,329 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 [2021-08-27 04:42:00,800 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-08-27 04:42:00,801 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 49 treesize of output 41 [2021-08-27 04:42:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-27 04:42:00,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739535558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:00,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:00,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2021-08-27 04:42:00,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475470536] [2021-08-27 04:42:00,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-27 04:42:00,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:00,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-27 04:42:00,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-08-27 04:42:00,840 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 31 states, 30 states have (on average 2.9) internal successors, (87), 28 states have internal predecessors, (87), 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) [2021-08-27 04:42:02,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:02,518 INFO L93 Difference]: Finished difference Result 167 states and 172 transitions. [2021-08-27 04:42:02,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-27 04:42:02,519 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.9) internal successors, (87), 28 states have internal predecessors, (87), 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 54 [2021-08-27 04:42:02,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:02,519 INFO L225 Difference]: With dead ends: 167 [2021-08-27 04:42:02,519 INFO L226 Difference]: Without dead ends: 83 [2021-08-27 04:42:02,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1576.4ms TimeCoverageRelationStatistics Valid=522, Invalid=4308, Unknown=0, NotChecked=0, Total=4830 [2021-08-27 04:42:02,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-27 04:42:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2021-08-27 04:42:02,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 72 states have internal predecessors, (77), 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) [2021-08-27 04:42:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-08-27 04:42:02,522 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 54 [2021-08-27 04:42:02,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:02,522 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-08-27 04:42:02,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.9) internal successors, (87), 28 states have internal predecessors, (87), 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) [2021-08-27 04:42:02,522 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-08-27 04:42:02,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-27 04:42:02,522 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:02,522 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-08-27 04:42:02,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:02,723 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,SelfDestructingSolverStorable24 [2021-08-27 04:42:02,723 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:02,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1240638882, now seen corresponding path program 5 times [2021-08-27 04:42:02,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:02,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402000598] [2021-08-27 04:42:02,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:02,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:02,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:42:02,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:02,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402000598] [2021-08-27 04:42:02,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402000598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:02,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301574332] [2021-08-27 04:42:02,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:42:02,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:02,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:02,901 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) [2021-08-27 04:42:02,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 04:42:03,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-27 04:42:03,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:03,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-27 04:42:03,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:42:03,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301574332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:03,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:03,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-08-27 04:42:03,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089487509] [2021-08-27 04:42:03,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-27 04:42:03,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:03,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-27 04:42:03,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-08-27 04:42:03,682 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 17 states have internal predecessors, (81), 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) [2021-08-27 04:42:04,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:04,105 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2021-08-27 04:42:04,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 04:42:04,106 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 17 states have internal predecessors, (81), 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 62 [2021-08-27 04:42:04,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:04,106 INFO L225 Difference]: With dead ends: 90 [2021-08-27 04:42:04,106 INFO L226 Difference]: Without dead ends: 90 [2021-08-27 04:42:04,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-08-27 04:42:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-27 04:42:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-08-27 04:42:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.155844155844156) internal successors, (89), 81 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) [2021-08-27 04:42:04,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2021-08-27 04:42:04,108 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 62 [2021-08-27 04:42:04,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:04,109 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2021-08-27 04:42:04,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 17 states have internal predecessors, (81), 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) [2021-08-27 04:42:04,109 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2021-08-27 04:42:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-27 04:42:04,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:04,109 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-08-27 04:42:04,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:04,327 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,SelfDestructingSolverStorable25 [2021-08-27 04:42:04,328 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:04,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:04,328 INFO L82 PathProgramCache]: Analyzing trace with hash -521766108, now seen corresponding path program 3 times [2021-08-27 04:42:04,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:04,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276955547] [2021-08-27 04:42:04,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:04,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:04,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:04,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:04,490 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:42:04,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:04,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276955547] [2021-08-27 04:42:04,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276955547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:04,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153651354] [2021-08-27 04:42:04,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:42:04,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:04,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:04,496 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) [2021-08-27 04:42:04,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 04:42:04,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-27 04:42:04,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:04,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-27 04:42:04,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:04,897 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:04,897 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 [2021-08-27 04:42:05,057 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 [2021-08-27 04:42:05,284 INFO L354 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2021-08-27 04:42:05,285 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 34 treesize of output 51 [2021-08-27 04:42:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-08-27 04:42:05,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153651354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:05,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:05,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-08-27 04:42:05,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074772950] [2021-08-27 04:42:05,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-27 04:42:05,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:05,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-27 04:42:05,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:42:05,481 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 24 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 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) [2021-08-27 04:42:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:07,305 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-08-27 04:42:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-27 04:42:07,306 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 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 66 [2021-08-27 04:42:07,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:07,306 INFO L225 Difference]: With dead ends: 89 [2021-08-27 04:42:07,307 INFO L226 Difference]: Without dead ends: 82 [2021-08-27 04:42:07,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1569.6ms TimeCoverageRelationStatistics Valid=470, Invalid=2392, Unknown=0, NotChecked=0, Total=2862 [2021-08-27 04:42:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-27 04:42:07,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-08-27 04:42:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 73 states have (on average 1.095890410958904) internal successors, (80), 75 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) [2021-08-27 04:42:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-08-27 04:42:07,309 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 66 [2021-08-27 04:42:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:07,309 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-08-27 04:42:07,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 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) [2021-08-27 04:42:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-08-27 04:42:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-08-27 04:42:07,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:07,309 INFO L512 BasicCegarLoop]: trace histogram [4, 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] [2021-08-27 04:42:07,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:07,510 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,SelfDestructingSolverStorable26 [2021-08-27 04:42:07,510 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:07,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:07,510 INFO L82 PathProgramCache]: Analyzing trace with hash -447516703, now seen corresponding path program 6 times [2021-08-27 04:42:07,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:07,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389832699] [2021-08-27 04:42:07,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:07,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:07,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:42:07,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:07,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389832699] [2021-08-27 04:42:07,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389832699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:07,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996000025] [2021-08-27 04:42:07,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:42:07,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:07,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:07,814 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) [2021-08-27 04:42:07,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 04:42:08,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-27 04:42:08,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:08,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-27 04:42:08,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:08,248 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 [2021-08-27 04:42:08,586 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 [2021-08-27 04:42:08,634 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-08-27 04:42:08,635 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 [2021-08-27 04:42:09,369 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-08-27 04:42:09,370 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 [2021-08-27 04:42:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:42:09,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996000025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:09,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:09,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-08-27 04:42:09,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454440590] [2021-08-27 04:42:09,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-27 04:42:09,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:09,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-27 04:42:09,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2021-08-27 04:42:09,393 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 30 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 27 states have internal predecessors, (103), 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) [2021-08-27 04:42:30,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:30,522 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-08-27 04:42:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-27 04:42:30,523 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 27 states have internal predecessors, (103), 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 69 [2021-08-27 04:42:30,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:30,523 INFO L225 Difference]: With dead ends: 129 [2021-08-27 04:42:30,523 INFO L226 Difference]: Without dead ends: 87 [2021-08-27 04:42:30,524 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 21066.6ms TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2021-08-27 04:42:30,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-27 04:42:30,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2021-08-27 04:42:30,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 79 states have internal predecessors, (84), 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) [2021-08-27 04:42:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-08-27 04:42:30,525 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 69 [2021-08-27 04:42:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:30,525 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-08-27 04:42:30,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 27 states have internal predecessors, (103), 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) [2021-08-27 04:42:30,526 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-08-27 04:42:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-27 04:42:30,526 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:30,526 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-08-27 04:42:30,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:30,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-27 04:42:30,727 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:30,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:30,727 INFO L82 PathProgramCache]: Analyzing trace with hash 831442788, now seen corresponding path program 7 times [2021-08-27 04:42:30,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:30,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447909371] [2021-08-27 04:42:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:30,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:30,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:42:30,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:30,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447909371] [2021-08-27 04:42:30,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447909371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:30,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975844593] [2021-08-27 04:42:30,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:42:30,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:30,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:30,924 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) [2021-08-27 04:42:30,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 04:42:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:31,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-27 04:42:31,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 04:42:31,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975844593] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:31,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:31,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-08-27 04:42:31,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855549461] [2021-08-27 04:42:31,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-27 04:42:31,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:31,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-27 04:42:31,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-08-27 04:42:31,750 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 24 states, 23 states have (on average 4.173913043478261) internal successors, (96), 21 states have internal predecessors, (96), 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) [2021-08-27 04:42:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:32,265 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-08-27 04:42:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:42:32,265 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.173913043478261) internal successors, (96), 21 states have internal predecessors, (96), 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 73 [2021-08-27 04:42:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:32,266 INFO L225 Difference]: With dead ends: 93 [2021-08-27 04:42:32,266 INFO L226 Difference]: Without dead ends: 91 [2021-08-27 04:42:32,266 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 368.1ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-08-27 04:42:32,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-27 04:42:32,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-08-27 04:42:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 86 states have internal predecessors, (91), 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) [2021-08-27 04:42:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2021-08-27 04:42:32,268 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 73 [2021-08-27 04:42:32,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:32,268 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2021-08-27 04:42:32,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.173913043478261) internal successors, (96), 21 states have internal predecessors, (96), 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) [2021-08-27 04:42:32,269 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2021-08-27 04:42:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-27 04:42:32,269 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:32,269 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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] [2021-08-27 04:42:32,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:32,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-27 04:42:32,487 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:32,487 INFO L82 PathProgramCache]: Analyzing trace with hash -8689637, now seen corresponding path program 8 times [2021-08-27 04:42:32,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:32,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573464328] [2021-08-27 04:42:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:32,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:32,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 49 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:42:32,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:32,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573464328] [2021-08-27 04:42:32,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573464328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:32,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578776433] [2021-08-27 04:42:32,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:42:32,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:32,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:32,667 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) [2021-08-27 04:42:32,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 04:42:33,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:42:33,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:33,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-27 04:42:33,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:33,189 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:33,190 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 [2021-08-27 04:42:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:42:33,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578776433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:33,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:33,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-08-27 04:42:33,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176945261] [2021-08-27 04:42:33,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-27 04:42:33,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:33,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-27 04:42:33,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-08-27 04:42:33,644 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 29 states, 28 states have (on average 4.321428571428571) internal successors, (121), 26 states have internal predecessors, (121), 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) [2021-08-27 04:42:34,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:34,030 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2021-08-27 04:42:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 04:42:34,031 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.321428571428571) internal successors, (121), 26 states have internal predecessors, (121), 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 80 [2021-08-27 04:42:34,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:34,032 INFO L225 Difference]: With dead ends: 135 [2021-08-27 04:42:34,032 INFO L226 Difference]: Without dead ends: 98 [2021-08-27 04:42:34,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 348.6ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-08-27 04:42:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-27 04:42:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2021-08-27 04:42:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 88 states have (on average 1.0795454545454546) internal successors, (95), 90 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) [2021-08-27 04:42:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-08-27 04:42:34,040 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 80 [2021-08-27 04:42:34,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:34,041 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-08-27 04:42:34,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.321428571428571) internal successors, (121), 26 states have internal predecessors, (121), 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) [2021-08-27 04:42:34,041 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-08-27 04:42:34,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-27 04:42:34,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:34,046 INFO L512 BasicCegarLoop]: trace histogram [5, 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] [2021-08-27 04:42:34,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:34,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:34,261 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:34,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:34,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1792286072, now seen corresponding path program 9 times [2021-08-27 04:42:34,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:34,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612921429] [2021-08-27 04:42:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:34,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:34,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:42:34,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:34,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612921429] [2021-08-27 04:42:34,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612921429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:34,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867744856] [2021-08-27 04:42:34,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:42:34,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:34,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:34,646 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) [2021-08-27 04:42:34,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 04:42:35,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-27 04:42:35,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:35,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-27 04:42:35,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:35,311 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:35,311 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 [2021-08-27 04:42:36,146 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 30 treesize of output 26 [2021-08-27 04:42:36,226 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-08-27 04:42:36,227 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 48 treesize of output 47 [2021-08-27 04:42:39,461 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-27 04:42:39,461 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 51 treesize of output 34 [2021-08-27 04:42:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:42:39,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867744856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:39,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:39,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2021-08-27 04:42:39,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924943242] [2021-08-27 04:42:39,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-27 04:42:39,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:39,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-27 04:42:39,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1050, Unknown=0, NotChecked=0, Total=1122 [2021-08-27 04:42:39,507 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 34 states, 33 states have (on average 3.787878787878788) internal successors, (125), 31 states have internal predecessors, (125), 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) [2021-08-27 04:42:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:41,178 INFO L93 Difference]: Finished difference Result 155 states and 160 transitions. [2021-08-27 04:42:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-27 04:42:41,179 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.787878787878788) internal successors, (125), 31 states have internal predecessors, (125), 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 84 [2021-08-27 04:42:41,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:41,179 INFO L225 Difference]: With dead ends: 155 [2021-08-27 04:42:41,179 INFO L226 Difference]: Without dead ends: 102 [2021-08-27 04:42:41,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1447.6ms TimeCoverageRelationStatistics Valid=192, Invalid=2358, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 04:42:41,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-27 04:42:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-08-27 04:42:41,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 92 states have (on average 1.076086956521739) internal successors, (99), 94 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) [2021-08-27 04:42:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-08-27 04:42:41,182 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 84 [2021-08-27 04:42:41,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:41,182 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-08-27 04:42:41,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.787878787878788) internal successors, (125), 31 states have internal predecessors, (125), 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) [2021-08-27 04:42:41,182 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-08-27 04:42:41,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-27 04:42:41,183 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:41,183 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-08-27 04:42:41,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-27 04:42:41,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:41,401 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:41,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:41,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1345546133, now seen corresponding path program 10 times [2021-08-27 04:42:41,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:41,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719218551] [2021-08-27 04:42:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:41,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:41,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 04:42:41,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:41,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719218551] [2021-08-27 04:42:41,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719218551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:41,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158944229] [2021-08-27 04:42:41,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:42:41,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:41,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:41,592 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) [2021-08-27 04:42:41,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 04:42:42,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:42:42,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:42,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-27 04:42:42,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:42,369 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:42,370 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 [2021-08-27 04:42:42,770 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 [2021-08-27 04:42:43,400 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-08-27 04:42:43,401 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 49 treesize of output 41 [2021-08-27 04:42:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 67 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:42:43,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158944229] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:43,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:43,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 38 [2021-08-27 04:42:43,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815022352] [2021-08-27 04:42:43,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-27 04:42:43,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:43,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-27 04:42:43,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:42:43,470 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 38 states, 37 states have (on average 3.675675675675676) internal successors, (136), 35 states have internal predecessors, (136), 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) [2021-08-27 04:42:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:45,438 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2021-08-27 04:42:45,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-27 04:42:45,439 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.675675675675676) internal successors, (136), 35 states have internal predecessors, (136), 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 88 [2021-08-27 04:42:45,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:45,439 INFO L225 Difference]: With dead ends: 154 [2021-08-27 04:42:45,439 INFO L226 Difference]: Without dead ends: 113 [2021-08-27 04:42:45,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1671.3ms TimeCoverageRelationStatistics Valid=603, Invalid=4947, Unknown=0, NotChecked=0, Total=5550 [2021-08-27 04:42:45,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-27 04:42:45,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-08-27 04:42:45,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 105 states have internal predecessors, (110), 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) [2021-08-27 04:42:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-08-27 04:42:45,442 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 88 [2021-08-27 04:42:45,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:45,442 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-08-27 04:42:45,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.675675675675676) internal successors, (136), 35 states have internal predecessors, (136), 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) [2021-08-27 04:42:45,442 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-08-27 04:42:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-08-27 04:42:45,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:45,443 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-08-27 04:42:45,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:45,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:45,643 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:45,644 INFO L82 PathProgramCache]: Analyzing trace with hash -47887411, now seen corresponding path program 11 times [2021-08-27 04:42:45,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:45,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220269210] [2021-08-27 04:42:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:45,644 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:46,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:42:46,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:46,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220269210] [2021-08-27 04:42:46,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220269210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:46,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709264915] [2021-08-27 04:42:46,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:42:46,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:46,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:46,022 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) [2021-08-27 04:42:46,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 04:42:46,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-27 04:42:46,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:46,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-27 04:42:46,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:47,245 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 [2021-08-27 04:42:48,360 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-08-27 04:42:48,360 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 36 [2021-08-27 04:42:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-08-27 04:42:48,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709264915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:48,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:48,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2021-08-27 04:42:48,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405556797] [2021-08-27 04:42:48,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-27 04:42:48,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:48,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-27 04:42:48,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1634, Unknown=0, NotChecked=0, Total=1722 [2021-08-27 04:42:48,411 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 42 states, 41 states have (on average 3.731707317073171) internal successors, (153), 39 states have internal predecessors, (153), 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) [2021-08-27 04:42:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:51,811 INFO L93 Difference]: Finished difference Result 283 states and 288 transitions. [2021-08-27 04:42:51,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-27 04:42:51,811 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.731707317073171) internal successors, (153), 39 states have internal predecessors, (153), 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 99 [2021-08-27 04:42:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:51,812 INFO L225 Difference]: With dead ends: 283 [2021-08-27 04:42:51,812 INFO L226 Difference]: Without dead ends: 124 [2021-08-27 04:42:51,813 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 2671.5ms TimeCoverageRelationStatistics Valid=491, Invalid=7341, Unknown=0, NotChecked=0, Total=7832 [2021-08-27 04:42:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-27 04:42:51,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2021-08-27 04:42:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 111 states have (on average 1.063063063063063) internal successors, (118), 113 states have internal predecessors, (118), 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) [2021-08-27 04:42:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-08-27 04:42:51,816 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 99 [2021-08-27 04:42:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:51,816 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-08-27 04:42:51,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.731707317073171) internal successors, (153), 39 states have internal predecessors, (153), 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) [2021-08-27 04:42:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-08-27 04:42:51,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-08-27 04:42:51,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:51,817 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-08-27 04:42:51,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:52,037 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,SelfDestructingSolverStorable32 [2021-08-27 04:42:52,037 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:52,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:52,037 INFO L82 PathProgramCache]: Analyzing trace with hash 242398739, now seen corresponding path program 12 times [2021-08-27 04:42:52,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:52,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775823858] [2021-08-27 04:42:52,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:52,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:52,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 28 proven. 149 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:42:52,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:52,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775823858] [2021-08-27 04:42:52,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775823858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:52,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532835901] [2021-08-27 04:42:52,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:42:52,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:52,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:52,360 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) [2021-08-27 04:42:52,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-27 04:42:53,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-27 04:42:53,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:42:53,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-27 04:42:53,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:53,406 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:42:53,406 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 [2021-08-27 04:42:53,416 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 [2021-08-27 04:42:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:42:54,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532835901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:54,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:54,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-08-27 04:42:54,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72594162] [2021-08-27 04:42:54,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-27 04:42:54,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:54,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-27 04:42:54,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 04:42:54,709 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 35 states, 34 states have (on average 4.764705882352941) internal successors, (162), 32 states have internal predecessors, (162), 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) [2021-08-27 04:42:55,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:42:55,863 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2021-08-27 04:42:55,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 04:42:55,864 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.764705882352941) internal successors, (162), 32 states have internal predecessors, (162), 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 107 [2021-08-27 04:42:55,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:42:55,864 INFO L225 Difference]: With dead ends: 127 [2021-08-27 04:42:55,864 INFO L226 Difference]: Without dead ends: 125 [2021-08-27 04:42:55,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1041.7ms TimeCoverageRelationStatistics Valid=277, Invalid=2173, Unknown=0, NotChecked=0, Total=2450 [2021-08-27 04:42:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-27 04:42:55,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-08-27 04:42:55,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 118 states have (on average 1.0593220338983051) internal successors, (125), 120 states have internal predecessors, (125), 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) [2021-08-27 04:42:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2021-08-27 04:42:55,867 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 107 [2021-08-27 04:42:55,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:42:55,867 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2021-08-27 04:42:55,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.764705882352941) internal successors, (162), 32 states have internal predecessors, (162), 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) [2021-08-27 04:42:55,867 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2021-08-27 04:42:55,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-08-27 04:42:55,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:42:55,867 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 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] [2021-08-27 04:42:55,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-27 04:42:56,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:56,068 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:42:56,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:42:56,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1099534708, now seen corresponding path program 13 times [2021-08-27 04:42:56,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:42:56,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424498374] [2021-08-27 04:42:56,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:42:56,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:42:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:56,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:42:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 31 proven. 189 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:42:56,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:42:56,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424498374] [2021-08-27 04:42:56,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424498374] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:56,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740197698] [2021-08-27 04:42:56,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:42:56,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:42:56,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:42:56,553 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) [2021-08-27 04:42:56,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-27 04:42:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:42:57,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-27 04:42:57,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:42:57,995 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 [2021-08-27 04:42:59,205 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-08-27 04:42:59,206 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 32 [2021-08-27 04:42:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 7 proven. 213 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-08-27 04:42:59,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740197698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:42:59,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:42:59,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 46 [2021-08-27 04:42:59,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544131863] [2021-08-27 04:42:59,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-27 04:42:59,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:42:59,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-27 04:42:59,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1974, Unknown=0, NotChecked=0, Total=2070 [2021-08-27 04:42:59,259 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 46 states, 45 states have (on average 3.888888888888889) internal successors, (175), 43 states have internal predecessors, (175), 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) [2021-08-27 04:43:03,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:03,356 INFO L93 Difference]: Finished difference Result 323 states and 328 transitions. [2021-08-27 04:43:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-27 04:43:03,358 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.888888888888889) internal successors, (175), 43 states have internal predecessors, (175), 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 114 [2021-08-27 04:43:03,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:03,358 INFO L225 Difference]: With dead ends: 323 [2021-08-27 04:43:03,358 INFO L226 Difference]: Without dead ends: 139 [2021-08-27 04:43:03,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 3099.2ms TimeCoverageRelationStatistics Valid=529, Invalid=8783, Unknown=0, NotChecked=0, Total=9312 [2021-08-27 04:43:03,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-27 04:43:03,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 133. [2021-08-27 04:43:03,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 126 states have (on average 1.0555555555555556) internal successors, (133), 128 states have internal predecessors, (133), 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) [2021-08-27 04:43:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2021-08-27 04:43:03,362 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 114 [2021-08-27 04:43:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:03,362 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2021-08-27 04:43:03,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.888888888888889) internal successors, (175), 43 states have internal predecessors, (175), 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) [2021-08-27 04:43:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2021-08-27 04:43:03,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-08-27 04:43:03,363 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:03,363 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:03,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:03,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:03,563 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:43:03,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:03,563 INFO L82 PathProgramCache]: Analyzing trace with hash -972370042, now seen corresponding path program 14 times [2021-08-27 04:43:03,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:03,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108072626] [2021-08-27 04:43:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:03,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:03,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 45 proven. 200 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:43:03,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:03,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108072626] [2021-08-27 04:43:03,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108072626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:03,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144511464] [2021-08-27 04:43:03,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:43:03,829 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:03,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:03,830 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) [2021-08-27 04:43:03,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-27 04:43:04,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:43:04,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:04,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-27 04:43:04,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 66 proven. 179 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:43:05,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144511464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:05,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:05,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-08-27 04:43:05,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75332814] [2021-08-27 04:43:05,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-27 04:43:05,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:05,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-27 04:43:05,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 04:43:05,495 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 33 states, 32 states have (on average 4.40625) internal successors, (141), 30 states have internal predecessors, (141), 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) [2021-08-27 04:43:06,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:06,360 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2021-08-27 04:43:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-27 04:43:06,361 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.40625) internal successors, (141), 30 states have internal predecessors, (141), 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 122 [2021-08-27 04:43:06,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:06,362 INFO L225 Difference]: With dead ends: 142 [2021-08-27 04:43:06,362 INFO L226 Difference]: Without dead ends: 140 [2021-08-27 04:43:06,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 503.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-08-27 04:43:06,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-27 04:43:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-08-27 04:43:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 133 states have (on average 1.0526315789473684) internal successors, (140), 135 states have internal predecessors, (140), 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) [2021-08-27 04:43:06,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2021-08-27 04:43:06,364 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 122 [2021-08-27 04:43:06,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:06,365 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2021-08-27 04:43:06,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.40625) internal successors, (141), 30 states have internal predecessors, (141), 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) [2021-08-27 04:43:06,365 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2021-08-27 04:43:06,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-08-27 04:43:06,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:06,366 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:43:06,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:06,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:06,581 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:43:06,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:06,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1936154041, now seen corresponding path program 15 times [2021-08-27 04:43:06,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:06,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101455142] [2021-08-27 04:43:06,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:06,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:07,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:07,100 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 36 proven. 259 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-08-27 04:43:07,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:07,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101455142] [2021-08-27 04:43:07,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101455142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:07,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203155575] [2021-08-27 04:43:07,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:43:07,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:07,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:07,113 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) [2021-08-27 04:43:07,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-27 04:43:08,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-27 04:43:08,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:08,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 106 conjunts are in the unsatisfiable core [2021-08-27 04:43:08,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:09,876 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 [2021-08-27 04:43:11,458 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-08-27 04:43:11,459 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 27 [2021-08-27 04:43:11,538 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 8 proven. 377 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 04:43:11,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203155575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:11,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:11,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 35] total 57 [2021-08-27 04:43:11,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735953015] [2021-08-27 04:43:11,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-27 04:43:11,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:11,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-27 04:43:11,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=3058, Unknown=0, NotChecked=0, Total=3192 [2021-08-27 04:43:11,539 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 57 states, 56 states have (on average 3.9464285714285716) internal successors, (221), 54 states have internal predecessors, (221), 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) [2021-08-27 04:43:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:16,435 INFO L93 Difference]: Finished difference Result 363 states and 368 transitions. [2021-08-27 04:43:16,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-27 04:43:16,437 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.9464285714285716) internal successors, (221), 54 states have internal predecessors, (221), 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 129 [2021-08-27 04:43:16,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:16,438 INFO L225 Difference]: With dead ends: 363 [2021-08-27 04:43:16,438 INFO L226 Difference]: Without dead ends: 154 [2021-08-27 04:43:16,439 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2722 ImplicationChecksByTransitivity, 4340.1ms TimeCoverageRelationStatistics Valid=668, Invalid=13612, Unknown=0, NotChecked=0, Total=14280 [2021-08-27 04:43:16,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-27 04:43:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2021-08-27 04:43:16,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 141 states have (on average 1.049645390070922) internal successors, (148), 143 states have internal predecessors, (148), 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) [2021-08-27 04:43:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2021-08-27 04:43:16,441 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 129 [2021-08-27 04:43:16,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:16,441 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2021-08-27 04:43:16,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.9464285714285716) internal successors, (221), 54 states have internal predecessors, (221), 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) [2021-08-27 04:43:16,441 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2021-08-27 04:43:16,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-08-27 04:43:16,447 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:16,447 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 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] [2021-08-27 04:43:16,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:16,647 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,SelfDestructingSolverStorable36 [2021-08-27 04:43:16,648 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:43:16,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:16,648 INFO L82 PathProgramCache]: Analyzing trace with hash 171788671, now seen corresponding path program 16 times [2021-08-27 04:43:16,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:16,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976095026] [2021-08-27 04:43:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:16,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:17,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 66 proven. 258 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 04:43:17,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:17,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976095026] [2021-08-27 04:43:17,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976095026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:17,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846697248] [2021-08-27 04:43:17,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:43:17,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:17,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:17,021 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) [2021-08-27 04:43:17,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-27 04:43:18,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:43:18,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:18,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-27 04:43:18,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:18,347 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:43:18,348 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 [2021-08-27 04:43:18,358 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 [2021-08-27 04:43:19,601 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 16 treesize of output 12 [2021-08-27 04:43:19,660 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 04:43:19,661 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 33 treesize of output 32 [2021-08-27 04:43:21,377 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-08-27 04:43:21,378 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 26 [2021-08-27 04:43:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 98 proven. 226 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 04:43:21,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846697248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:21,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:21,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 47 [2021-08-27 04:43:21,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526900229] [2021-08-27 04:43:21,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-27 04:43:21,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:21,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-27 04:43:21,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2081, Unknown=0, NotChecked=0, Total=2256 [2021-08-27 04:43:21,716 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 48 states, 46 states have (on average 4.478260869565218) internal successors, (206), 45 states have internal predecessors, (206), 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) [2021-08-27 04:43:24,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:24,163 INFO L93 Difference]: Finished difference Result 157 states and 162 transitions. [2021-08-27 04:43:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-27 04:43:24,164 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 4.478260869565218) internal successors, (206), 45 states have internal predecessors, (206), 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 137 [2021-08-27 04:43:24,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:24,165 INFO L225 Difference]: With dead ends: 157 [2021-08-27 04:43:24,165 INFO L226 Difference]: Without dead ends: 155 [2021-08-27 04:43:24,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 2096.2ms TimeCoverageRelationStatistics Valid=367, Invalid=3665, Unknown=0, NotChecked=0, Total=4032 [2021-08-27 04:43:24,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-27 04:43:24,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-08-27 04:43:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 148 states have (on average 1.0472972972972974) internal successors, (155), 150 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) [2021-08-27 04:43:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2021-08-27 04:43:24,168 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 137 [2021-08-27 04:43:24,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:24,168 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2021-08-27 04:43:24,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 4.478260869565218) internal successors, (206), 45 states have internal predecessors, (206), 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) [2021-08-27 04:43:24,168 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2021-08-27 04:43:24,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-08-27 04:43:24,169 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:24,169 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-08-27 04:43:24,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:24,391 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,SelfDestructingSolverStorable37 [2021-08-27 04:43:24,391 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:43:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:24,392 INFO L82 PathProgramCache]: Analyzing trace with hash -349214304, now seen corresponding path program 17 times [2021-08-27 04:43:24,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:24,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991825861] [2021-08-27 04:43:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:24,392 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:24,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 41 proven. 340 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 04:43:24,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:24,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991825861] [2021-08-27 04:43:24,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991825861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:24,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95093021] [2021-08-27 04:43:24,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:43:24,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:24,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:24,981 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) [2021-08-27 04:43:24,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-27 04:43:26,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-27 04:43:26,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:26,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-27 04:43:26,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:27,188 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 [2021-08-27 04:43:28,525 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-08-27 04:43:28,525 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 36 [2021-08-27 04:43:28,578 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 9 proven. 372 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-08-27 04:43:28,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95093021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:28,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:28,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 54 [2021-08-27 04:43:28,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343330994] [2021-08-27 04:43:28,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-27 04:43:28,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:28,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-27 04:43:28,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2750, Unknown=0, NotChecked=0, Total=2862 [2021-08-27 04:43:28,581 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand has 54 states, 53 states have (on average 4.132075471698113) internal successors, (219), 51 states have internal predecessors, (219), 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) [2021-08-27 04:43:34,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:34,213 INFO L93 Difference]: Finished difference Result 403 states and 408 transitions. [2021-08-27 04:43:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-27 04:43:34,214 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 4.132075471698113) internal successors, (219), 51 states have internal predecessors, (219), 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 144 [2021-08-27 04:43:34,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:34,214 INFO L225 Difference]: With dead ends: 403 [2021-08-27 04:43:34,215 INFO L226 Difference]: Without dead ends: 169 [2021-08-27 04:43:34,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 3890.8ms TimeCoverageRelationStatistics Valid=605, Invalid=12051, Unknown=0, NotChecked=0, Total=12656 [2021-08-27 04:43:34,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-27 04:43:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 163. [2021-08-27 04:43:34,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 156 states have (on average 1.044871794871795) internal successors, (163), 158 states have internal predecessors, (163), 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) [2021-08-27 04:43:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 167 transitions. [2021-08-27 04:43:34,218 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 167 transitions. Word has length 144 [2021-08-27 04:43:34,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:34,218 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 167 transitions. [2021-08-27 04:43:34,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 4.132075471698113) internal successors, (219), 51 states have internal predecessors, (219), 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) [2021-08-27 04:43:34,218 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 167 transitions. [2021-08-27 04:43:34,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-08-27 04:43:34,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:34,219 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-08-27 04:43:34,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:34,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-27 04:43:34,429 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:43:34,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:34,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2138052890, now seen corresponding path program 18 times [2021-08-27 04:43:34,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:34,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455479787] [2021-08-27 04:43:34,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:34,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:34,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:34,830 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 91 proven. 323 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 04:43:34,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:34,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455479787] [2021-08-27 04:43:34,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455479787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:34,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325728392] [2021-08-27 04:43:34,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:43:34,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:34,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:34,841 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) [2021-08-27 04:43:34,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-27 04:43:37,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-27 04:43:37,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:37,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-27 04:43:37,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 04:43:38,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325728392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:38,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:38,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 37 [2021-08-27 04:43:38,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520812839] [2021-08-27 04:43:38,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-27 04:43:38,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:38,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-27 04:43:38,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-08-27 04:43:38,690 INFO L87 Difference]: Start difference. First operand 163 states and 167 transitions. Second operand has 38 states, 37 states have (on average 5.054054054054054) internal successors, (187), 35 states have internal predecessors, (187), 2 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) [2021-08-27 04:43:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:39,951 INFO L93 Difference]: Finished difference Result 172 states and 177 transitions. [2021-08-27 04:43:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-27 04:43:39,952 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 5.054054054054054) internal successors, (187), 35 states have internal predecessors, (187), 2 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 152 [2021-08-27 04:43:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:39,953 INFO L225 Difference]: With dead ends: 172 [2021-08-27 04:43:39,953 INFO L226 Difference]: Without dead ends: 170 [2021-08-27 04:43:39,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 993.6ms TimeCoverageRelationStatistics Valid=322, Invalid=2228, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 04:43:39,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-08-27 04:43:39,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-08-27 04:43:39,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 163 states have (on average 1.0429447852760736) internal successors, (170), 165 states have internal predecessors, (170), 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) [2021-08-27 04:43:39,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2021-08-27 04:43:39,955 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 152 [2021-08-27 04:43:39,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:39,955 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2021-08-27 04:43:39,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 5.054054054054054) internal successors, (187), 35 states have internal predecessors, (187), 2 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) [2021-08-27 04:43:39,955 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2021-08-27 04:43:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-08-27 04:43:39,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:39,956 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 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] [2021-08-27 04:43:39,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:40,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:40,165 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:43:40,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:40,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1839471195, now seen corresponding path program 19 times [2021-08-27 04:43:40,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:40,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211605280] [2021-08-27 04:43:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:40,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:40,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 46 proven. 432 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 04:43:40,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:40,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211605280] [2021-08-27 04:43:40,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211605280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:40,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929350326] [2021-08-27 04:43:40,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-27 04:43:40,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:40,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:40,756 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) [2021-08-27 04:43:40,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-27 04:43:42,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:42,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-27 04:43:42,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:43,002 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 [2021-08-27 04:43:44,713 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-08-27 04:43:44,713 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 36 [2021-08-27 04:43:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 10 proven. 468 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-08-27 04:43:44,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929350326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:44,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:44,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 58 [2021-08-27 04:43:44,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608528429] [2021-08-27 04:43:44,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-08-27 04:43:44,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:44,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-27 04:43:44,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3186, Unknown=0, NotChecked=0, Total=3306 [2021-08-27 04:43:44,778 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 58 states, 57 states have (on average 4.228070175438597) internal successors, (241), 55 states have internal predecessors, (241), 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) [2021-08-27 04:43:51,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:51,264 INFO L93 Difference]: Finished difference Result 443 states and 448 transitions. [2021-08-27 04:43:51,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-27 04:43:51,265 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 4.228070175438597) internal successors, (241), 55 states have internal predecessors, (241), 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 159 [2021-08-27 04:43:51,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:51,266 INFO L225 Difference]: With dead ends: 443 [2021-08-27 04:43:51,266 INFO L226 Difference]: Without dead ends: 184 [2021-08-27 04:43:51,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 4573.1ms TimeCoverageRelationStatistics Valid=643, Invalid=13877, Unknown=0, NotChecked=0, Total=14520 [2021-08-27 04:43:51,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-08-27 04:43:51,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 178. [2021-08-27 04:43:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 171 states have (on average 1.04093567251462) internal successors, (178), 173 states have internal predecessors, (178), 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) [2021-08-27 04:43:51,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2021-08-27 04:43:51,269 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 159 [2021-08-27 04:43:51,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:51,269 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2021-08-27 04:43:51,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 4.228070175438597) internal successors, (241), 55 states have internal predecessors, (241), 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) [2021-08-27 04:43:51,270 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2021-08-27 04:43:51,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-08-27 04:43:51,270 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:51,270 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 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] [2021-08-27 04:43:51,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-27 04:43:51,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:51,481 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:43:51,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:51,481 INFO L82 PathProgramCache]: Analyzing trace with hash -988368149, now seen corresponding path program 20 times [2021-08-27 04:43:51,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:51,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128226933] [2021-08-27 04:43:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:51,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:51,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 120 proven. 395 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-27 04:43:51,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:51,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128226933] [2021-08-27 04:43:51,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128226933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:51,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259161668] [2021-08-27 04:43:51,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 04:43:51,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:51,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:51,921 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) [2021-08-27 04:43:51,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-27 04:43:53,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 04:43:53,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:53,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-27 04:43:53,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:43:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 153 proven. 362 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-27 04:43:54,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259161668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:54,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:43:54,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 41 [2021-08-27 04:43:54,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412174392] [2021-08-27 04:43:54,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-27 04:43:54,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:43:54,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-27 04:43:54,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2021-08-27 04:43:54,595 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 42 states, 41 states have (on average 4.536585365853658) internal successors, (186), 39 states have internal predecessors, (186), 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) [2021-08-27 04:43:55,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:43:55,961 INFO L93 Difference]: Finished difference Result 187 states and 192 transitions. [2021-08-27 04:43:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 04:43:55,961 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.536585365853658) internal successors, (186), 39 states have internal predecessors, (186), 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 167 [2021-08-27 04:43:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:43:55,962 INFO L225 Difference]: With dead ends: 187 [2021-08-27 04:43:55,962 INFO L226 Difference]: Without dead ends: 185 [2021-08-27 04:43:55,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 828.2ms TimeCoverageRelationStatistics Valid=356, Invalid=2724, Unknown=0, NotChecked=0, Total=3080 [2021-08-27 04:43:55,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-08-27 04:43:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-08-27 04:43:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 178 states have (on average 1.0393258426966292) internal successors, (185), 180 states have internal predecessors, (185), 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) [2021-08-27 04:43:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2021-08-27 04:43:55,965 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 167 [2021-08-27 04:43:55,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:43:55,965 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2021-08-27 04:43:55,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.536585365853658) internal successors, (186), 39 states have internal predecessors, (186), 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) [2021-08-27 04:43:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2021-08-27 04:43:55,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-08-27 04:43:55,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:43:55,966 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 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] [2021-08-27 04:43:55,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-27 04:43:56,180 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,SelfDestructingSolverStorable41 [2021-08-27 04:43:56,181 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:43:56,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:43:56,181 INFO L82 PathProgramCache]: Analyzing trace with hash 681365172, now seen corresponding path program 21 times [2021-08-27 04:43:56,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:43:56,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835527781] [2021-08-27 04:43:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:43:56,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:43:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:56,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:43:56,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:43:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 51 proven. 535 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-27 04:43:56,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:43:56,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835527781] [2021-08-27 04:43:56,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835527781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:43:56,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520459791] [2021-08-27 04:43:56,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 04:43:56,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:43:56,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:43:56,809 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) [2021-08-27 04:43:56,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-27 04:43:59,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-27 04:43:59,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:43:59,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 84 conjunts are in the unsatisfiable core [2021-08-27 04:43:59,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:00,295 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 [2021-08-27 04:44:02,280 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-08-27 04:44:02,280 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 32 [2021-08-27 04:44:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 11 proven. 575 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-08-27 04:44:02,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520459791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:02,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:02,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34] total 62 [2021-08-27 04:44:02,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886284526] [2021-08-27 04:44:02,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-27 04:44:02,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:02,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-27 04:44:02,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=3654, Unknown=0, NotChecked=0, Total=3782 [2021-08-27 04:44:02,349 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand has 62 states, 61 states have (on average 4.311475409836065) internal successors, (263), 59 states have internal predecessors, (263), 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) [2021-08-27 04:44:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:10,034 INFO L93 Difference]: Finished difference Result 483 states and 488 transitions. [2021-08-27 04:44:10,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-08-27 04:44:10,035 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 4.311475409836065) internal successors, (263), 59 states have internal predecessors, (263), 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 174 [2021-08-27 04:44:10,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:10,036 INFO L225 Difference]: With dead ends: 483 [2021-08-27 04:44:10,036 INFO L226 Difference]: Without dead ends: 199 [2021-08-27 04:44:10,037 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 5252.9ms TimeCoverageRelationStatistics Valid=681, Invalid=15831, Unknown=0, NotChecked=0, Total=16512 [2021-08-27 04:44:10,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-08-27 04:44:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 193. [2021-08-27 04:44:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 186 states have (on average 1.0376344086021505) internal successors, (193), 188 states have internal predecessors, (193), 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) [2021-08-27 04:44:10,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 197 transitions. [2021-08-27 04:44:10,039 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 197 transitions. Word has length 174 [2021-08-27 04:44:10,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:10,039 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 197 transitions. [2021-08-27 04:44:10,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 4.311475409836065) internal successors, (263), 59 states have internal predecessors, (263), 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) [2021-08-27 04:44:10,039 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 197 transitions. [2021-08-27 04:44:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-08-27 04:44:10,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:10,040 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:44:10,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:10,240 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,SelfDestructingSolverStorable42 [2021-08-27 04:44:10,240 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:44:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:10,241 INFO L82 PathProgramCache]: Analyzing trace with hash -119444306, now seen corresponding path program 22 times [2021-08-27 04:44:10,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:10,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401734682] [2021-08-27 04:44:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:10,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:10,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 153 proven. 474 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-27 04:44:10,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:10,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401734682] [2021-08-27 04:44:10,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401734682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:10,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279565159] [2021-08-27 04:44:10,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 04:44:10,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:10,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:10,743 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) [2021-08-27 04:44:10,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-27 04:44:12,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 04:44:12,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:12,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 81 conjunts are in the unsatisfiable core [2021-08-27 04:44:12,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:12,909 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-08-27 04:44:12,909 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 [2021-08-27 04:44:12,917 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 [2021-08-27 04:44:14,719 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 16 treesize of output 12 [2021-08-27 04:44:14,776 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-08-27 04:44:14,777 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 33 treesize of output 32 [2021-08-27 04:44:17,164 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-08-27 04:44:17,165 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 26 [2021-08-27 04:44:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 200 proven. 427 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-27 04:44:17,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279565159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:17,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:17,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32] total 59 [2021-08-27 04:44:17,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969755624] [2021-08-27 04:44:17,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-27 04:44:17,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:17,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-27 04:44:17,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=3263, Unknown=0, NotChecked=0, Total=3540 [2021-08-27 04:44:17,499 INFO L87 Difference]: Start difference. First operand 193 states and 197 transitions. Second operand has 60 states, 58 states have (on average 4.689655172413793) internal successors, (272), 57 states have internal predecessors, (272), 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) [2021-08-27 04:44:21,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:21,031 INFO L93 Difference]: Finished difference Result 202 states and 207 transitions. [2021-08-27 04:44:21,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-27 04:44:21,031 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 58 states have (on average 4.689655172413793) internal successors, (272), 57 states have internal predecessors, (272), 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 182 [2021-08-27 04:44:21,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:21,032 INFO L225 Difference]: With dead ends: 202 [2021-08-27 04:44:21,032 INFO L226 Difference]: Without dead ends: 200 [2021-08-27 04:44:21,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 2896.8ms TimeCoverageRelationStatistics Valid=523, Invalid=5639, Unknown=0, NotChecked=0, Total=6162 [2021-08-27 04:44:21,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-08-27 04:44:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-08-27 04:44:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 195 states have internal predecessors, (200), 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) [2021-08-27 04:44:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2021-08-27 04:44:21,035 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 182 [2021-08-27 04:44:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:21,036 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2021-08-27 04:44:21,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 58 states have (on average 4.689655172413793) internal successors, (272), 57 states have internal predecessors, (272), 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) [2021-08-27 04:44:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2021-08-27 04:44:21,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-08-27 04:44:21,038 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:21,038 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:44:21,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:21,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:21,263 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:44:21,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:21,263 INFO L82 PathProgramCache]: Analyzing trace with hash -679140463, now seen corresponding path program 23 times [2021-08-27 04:44:21,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:21,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926623645] [2021-08-27 04:44:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:21,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:21,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 56 proven. 649 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-27 04:44:21,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:21,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926623645] [2021-08-27 04:44:21,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926623645] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:21,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701683600] [2021-08-27 04:44:21,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 04:44:21,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:21,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:21,881 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) [2021-08-27 04:44:21,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-27 04:44:24,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-27 04:44:24,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:24,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 88 conjunts are in the unsatisfiable core [2021-08-27 04:44:24,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:25,714 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 [2021-08-27 04:44:27,859 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-08-27 04:44:27,860 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 32 [2021-08-27 04:44:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 12 proven. 693 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-08-27 04:44:27,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701683600] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:27,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:27,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36] total 66 [2021-08-27 04:44:27,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672101758] [2021-08-27 04:44:27,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-27 04:44:27,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-27 04:44:27,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4154, Unknown=0, NotChecked=0, Total=4290 [2021-08-27 04:44:27,931 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 66 states, 65 states have (on average 4.384615384615385) internal successors, (285), 63 states have internal predecessors, (285), 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) [2021-08-27 04:44:36,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:36,899 INFO L93 Difference]: Finished difference Result 523 states and 528 transitions. [2021-08-27 04:44:36,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-08-27 04:44:36,900 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 4.384615384615385) internal successors, (285), 63 states have internal predecessors, (285), 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 189 [2021-08-27 04:44:36,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:36,901 INFO L225 Difference]: With dead ends: 523 [2021-08-27 04:44:36,901 INFO L226 Difference]: Without dead ends: 214 [2021-08-27 04:44:36,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 5754.2ms TimeCoverageRelationStatistics Valid=719, Invalid=17913, Unknown=0, NotChecked=0, Total=18632 [2021-08-27 04:44:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-27 04:44:36,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 208. [2021-08-27 04:44:36,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 201 states have (on average 1.0348258706467661) internal successors, (208), 203 states have internal predecessors, (208), 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) [2021-08-27 04:44:36,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2021-08-27 04:44:36,904 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 189 [2021-08-27 04:44:36,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:36,904 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2021-08-27 04:44:36,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 4.384615384615385) internal successors, (285), 63 states have internal predecessors, (285), 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) [2021-08-27 04:44:36,905 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2021-08-27 04:44:36,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-08-27 04:44:36,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:44:36,905 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:44:36,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-27 04:44:37,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:37,106 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-08-27 04:44:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:44:37,106 INFO L82 PathProgramCache]: Analyzing trace with hash -761712041, now seen corresponding path program 24 times [2021-08-27 04:44:37,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:44:37,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813679034] [2021-08-27 04:44:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:44:37,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:44:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:37,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:44:37,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:44:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 190 proven. 560 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-08-27 04:44:37,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:44:37,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813679034] [2021-08-27 04:44:37,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813679034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:37,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43870763] [2021-08-27 04:44:37,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-27 04:44:37,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:37,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:44:37,640 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) [2021-08-27 04:44:37,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-27 04:44:43,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-27 04:44:43,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 04:44:43,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-27 04:44:43,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 04:44:43,274 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 [2021-08-27 04:44:43,279 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 [2021-08-27 04:44:44,380 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 15 treesize of output 11 [2021-08-27 04:44:44,420 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-08-27 04:44:44,420 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 32 treesize of output 31 [2021-08-27 04:44:45,396 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-08-27 04:44:45,397 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 26 [2021-08-27 04:44:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2021-08-27 04:44:45,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43870763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 04:44:45,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 04:44:45,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 40 [2021-08-27 04:44:45,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79252649] [2021-08-27 04:44:45,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-27 04:44:45,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:44:45,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-27 04:44:45,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 04:44:45,629 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand has 41 states, 39 states have (on average 4.615384615384615) internal successors, (180), 38 states have internal predecessors, (180), 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) [2021-08-27 04:44:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:44:48,580 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2021-08-27 04:44:48,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-27 04:44:48,581 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 4.615384615384615) internal successors, (180), 38 states have internal predecessors, (180), 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 197 [2021-08-27 04:44:48,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:44:48,581 INFO L225 Difference]: With dead ends: 206 [2021-08-27 04:44:48,581 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 04:44:48,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2165.4ms TimeCoverageRelationStatistics Valid=655, Invalid=4601, Unknown=0, NotChecked=0, Total=5256 [2021-08-27 04:44:48,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 04:44:48,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 04:44:48,582 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) [2021-08-27 04:44:48,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 04:44:48,582 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 197 [2021-08-27 04:44:48,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:44:48,583 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 04:44:48,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 4.615384615384615) internal successors, (180), 38 states have internal predecessors, (180), 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) [2021-08-27 04:44:48,583 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 04:44:48,583 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 04:44:48,584 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr0REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr1REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr2REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr3REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr4REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr5REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr6REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr7REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr8REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr9REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-08-27 04:44:48,585 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-08-27 04:44:48,586 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-08-27 04:44:48,586 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-08-27 04:44:48,586 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:44:48,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-27 04:44:48,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 04:44:48,789 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:44:48,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:44:48 BoogieIcfgContainer [2021-08-27 04:44:48,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:44:48,791 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:44:48,791 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:44:48,791 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:44:48,791 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:41:46" (3/4) ... [2021-08-27 04:44:48,793 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 04:44:48,796 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 04:44:48,802 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrcmp [2021-08-27 04:44:48,802 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 04:44:48,802 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 04:44:48,802 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-08-27 04:44:48,802 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-08-27 04:44:48,803 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 04:44:48,803 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-08-27 04:44:48,811 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-08-27 04:44:48,811 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-27 04:44:48,812 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:44:48,812 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 04:44:48,871 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 04:44:48,872 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:44:48,872 INFO L168 Benchmark]: Toolchain (without parser) took 183223.54 ms. Allocated memory was 58.7 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 41.7 MB in the beginning and 757.1 MB in the end (delta: -715.4 MB). Peak memory consumption was 585.9 MB. Max. memory is 16.1 GB. [2021-08-27 04:44:48,872 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 48.2 MB. Free memory was 28.9 MB in the beginning and 28.9 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:44:48,872 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.55 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 35.7 MB in the end (delta: 5.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-27 04:44:48,873 INFO L168 Benchmark]: Boogie Preprocessor took 63.83 ms. Allocated memory is still 58.7 MB. Free memory was 35.7 MB in the beginning and 33.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:44:48,873 INFO L168 Benchmark]: RCFGBuilder took 425.48 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 33.2 MB in the beginning and 43.1 MB in the end (delta: -9.8 MB). Peak memory consumption was 11.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:44:48,873 INFO L168 Benchmark]: TraceAbstraction took 182304.45 ms. Allocated memory was 71.3 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 42.3 MB in the beginning and 760.3 MB in the end (delta: -718.0 MB). Peak memory consumption was 569.5 MB. Max. memory is 16.1 GB. [2021-08-27 04:44:48,873 INFO L168 Benchmark]: Witness Printer took 80.93 ms. Allocated memory is still 1.4 GB. Free memory was 760.3 MB in the beginning and 757.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:44:48,874 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 48.2 MB. Free memory was 28.9 MB in the beginning and 28.9 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 343.55 ms. Allocated memory is still 58.7 MB. Free memory was 41.5 MB in the beginning and 35.7 MB in the end (delta: 5.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.83 ms. Allocated memory is still 58.7 MB. Free memory was 35.7 MB in the beginning and 33.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 425.48 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 33.2 MB in the beginning and 43.1 MB in the end (delta: -9.8 MB). Peak memory consumption was 11.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 182304.45 ms. Allocated memory was 71.3 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 42.3 MB in the beginning and 760.3 MB in the end (delta: -718.0 MB). Peak memory consumption was 569.5 MB. Max. memory is 16.1 GB. * Witness Printer took 80.93 ms. Allocated memory is still 1.4 GB. Free memory was 760.3 MB in the beginning and 757.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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: 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: 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: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: 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: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: 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, 76 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 182270.0ms, OverallIterations: 46, TraceHistogramMax: 12, EmptinessCheckTime: 39.6ms, AutomataDifference: 89807.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1849 SDtfs, 8404 SDslu, 13028 SDs, 0 SdLazy, 78534 SolverSat, 1349 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 31705.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4392 GetRequests, 2503 SyntacticMatches, 23 SemanticMatches, 1866 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24834 ImplicationChecksByTransitivity, 71827.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=45, InterpolantAutomatonStates: 1177, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 132.6ms AutomataMinimizationTime, 46 MinimizatonAttempts, 285 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 468.1ms SsaConstructionTime, 8117.6ms SatisfiabilityAnalysisTime, 51394.7ms InterpolantComputationTime, 6093 NumberOfCodeBlocks, 6038 NumberOfCodeBlocksAsserted, 170 NumberOfCheckSat, 6018 ConstructedInterpolants, 720 QuantifiedInterpolants, 65704 SizeOfPredicates, 312 NumberOfNonLiveVariables, 10916 ConjunctsInSsa, 1397 ConjunctsInUnsatCore, 75 InterpolantComputations, 17 PerfectInterpolantSequences, 7090/17384 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! [2021-08-27 04:44:48,940 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...