./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/list-ext_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/list-ext-properties/list-ext_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 d6c9e5ba66547a8817cc7b16e9df45177efa4b55 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/list-ext-properties/list-ext_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 d6c9e5ba66547a8817cc7b16e9df45177efa4b55 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 05:50:35,073 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 05:50:35,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 05:50:35,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 05:50:35,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 05:50:35,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 05:50:35,124 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 05:50:35,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 05:50:35,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 05:50:35,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 05:50:35,138 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 05:50:35,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 05:50:35,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 05:50:35,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 05:50:35,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 05:50:35,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 05:50:35,150 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 05:50:35,151 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 05:50:35,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 05:50:35,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 05:50:35,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 05:50:35,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 05:50:35,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 05:50:35,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 05:50:35,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 05:50:35,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 05:50:35,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 05:50:35,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 05:50:35,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 05:50:35,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 05:50:35,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 05:50:35,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 05:50:35,176 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 05:50:35,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 05:50:35,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 05:50:35,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 05:50:35,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 05:50:35,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 05:50:35,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 05:50:35,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 05:50:35,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 05:50:35,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 05:50:35,213 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 05:50:35,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 05:50:35,214 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 05:50:35,214 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 05:50:35,216 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 05:50:35,216 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 05:50:35,217 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 05:50:35,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 05:50:35,217 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 05:50:35,217 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 05:50:35,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 05:50:35,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 05:50:35,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 05:50:35,218 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 05:50:35,219 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 05:50:35,219 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 05:50:35,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 05:50:35,219 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 05:50:35,219 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 05:50:35,225 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 05:50:35,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 05:50:35,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 05:50:35,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 05:50:35,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:50:35,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 05:50:35,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 05:50:35,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 05:50:35,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 05:50:35,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 05:50:35,227 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6c9e5ba66547a8817cc7b16e9df45177efa4b55 [2021-08-27 05:50:35,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 05:50:35,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 05:50:35,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 05:50:35,592 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 05:50:35,597 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 05:50:35,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/list-ext_2.i [2021-08-27 05:50:35,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7407d19b3/399d6e673c4749b59c8c04f2c373d8b4/FLAG5fa3f1bcd [2021-08-27 05:50:36,213 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 05:50:36,217 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/list-ext_2.i [2021-08-27 05:50:36,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7407d19b3/399d6e673c4749b59c8c04f2c373d8b4/FLAG5fa3f1bcd [2021-08-27 05:50:36,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7407d19b3/399d6e673c4749b59c8c04f2c373d8b4 [2021-08-27 05:50:36,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 05:50:36,540 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 05:50:36,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 05:50:36,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 05:50:36,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 05:50:36,546 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:50:36" (1/1) ... [2021-08-27 05:50:36,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4016e54b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:36, skipping insertion in model container [2021-08-27 05:50:36,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:50:36" (1/1) ... [2021-08-27 05:50:36,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 05:50:36,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 05:50:36,888 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/list-ext_2.i[23625,23638] [2021-08-27 05:50:36,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:50:36,911 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 05:50:36,965 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/list-ext_2.i[23625,23638] [2021-08-27 05:50:36,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:50:36,997 INFO L208 MainTranslator]: Completed translation [2021-08-27 05:50:36,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:36 WrapperNode [2021-08-27 05:50:36,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 05:50:36,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 05:50:36,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 05:50:36,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 05:50:37,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:36" (1/1) ... [2021-08-27 05:50:37,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:36" (1/1) ... [2021-08-27 05:50:37,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:36" (1/1) ... [2021-08-27 05:50:37,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:36" (1/1) ... [2021-08-27 05:50:37,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:36" (1/1) ... [2021-08-27 05:50:37,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:36" (1/1) ... [2021-08-27 05:50:37,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:36" (1/1) ... [2021-08-27 05:50:37,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 05:50:37,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 05:50:37,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 05:50:37,063 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 05:50:37,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:36" (1/1) ... [2021-08-27 05:50:37,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:50:37,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:50:37,089 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 05:50:37,092 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 05:50:37,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 05:50:37,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 05:50:37,121 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 05:50:37,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 05:50:37,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 05:50:37,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 05:50:37,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 05:50:37,122 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 05:50:37,122 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-27 05:50:37,122 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 05:50:37,123 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 05:50:37,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 05:50:37,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 05:50:37,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 05:50:37,123 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 05:50:37,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 05:50:37,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 05:50:37,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2021-08-27 05:50:37,124 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 05:50:37,124 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 05:50:37,124 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 05:50:37,124 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 05:50:37,124 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 05:50:37,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 05:50:37,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 05:50:37,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 05:50:37,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 05:50:37,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 05:50:37,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 05:50:37,125 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 05:50:37,126 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 05:50:37,126 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 05:50:37,126 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 05:50:37,126 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 05:50:37,126 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 05:50:37,126 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 05:50:37,126 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 05:50:37,126 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 05:50:37,127 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 05:50:37,127 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 05:50:37,127 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 05:50:37,127 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 05:50:37,127 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 05:50:37,127 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 05:50:37,127 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 05:50:37,128 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 05:50:37,128 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 05:50:37,128 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 05:50:37,128 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 05:50:37,128 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 05:50:37,128 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 05:50:37,128 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 05:50:37,129 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 05:50:37,129 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 05:50:37,129 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 05:50:37,129 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 05:50:37,129 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 05:50:37,129 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 05:50:37,129 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 05:50:37,130 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 05:50:37,130 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 05:50:37,130 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 05:50:37,130 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 05:50:37,130 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 05:50:37,130 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 05:50:37,130 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 05:50:37,131 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 05:50:37,131 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 05:50:37,131 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 05:50:37,131 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 05:50:37,131 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 05:50:37,131 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 05:50:37,131 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 05:50:37,136 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 05:50:37,136 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 05:50:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 05:50:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 05:50:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 05:50:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 05:50:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 05:50:37,137 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 05:50:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 05:50:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 05:50:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 05:50:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 05:50:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 05:50:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 05:50:37,138 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 05:50:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 05:50:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 05:50:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 05:50:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 05:50:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 05:50:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 05:50:37,139 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 05:50:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 05:50:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 05:50:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 05:50:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 05:50:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 05:50:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 05:50:37,140 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 05:50:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 05:50:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 05:50:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 05:50:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 05:50:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 05:50:37,141 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 05:50:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 05:50:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 05:50:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 05:50:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 05:50:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 05:50:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 05:50:37,142 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 05:50:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 05:50:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 05:50:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 05:50:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 05:50:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 05:50:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 05:50:37,143 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 05:50:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 05:50:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 05:50:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-27 05:50:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 05:50:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 05:50:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 05:50:37,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 05:50:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 05:50:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 05:50:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 05:50:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 05:50:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 05:50:37,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 05:50:37,523 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-27 05:50:37,762 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 05:50:37,762 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-27 05:50:37,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:50:37 BoogieIcfgContainer [2021-08-27 05:50:37,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 05:50:37,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 05:50:37,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 05:50:37,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 05:50:37,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:50:36" (1/3) ... [2021-08-27 05:50:37,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18afcb94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:50:37, skipping insertion in model container [2021-08-27 05:50:37,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:36" (2/3) ... [2021-08-27 05:50:37,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18afcb94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:50:37, skipping insertion in model container [2021-08-27 05:50:37,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:50:37" (3/3) ... [2021-08-27 05:50:37,771 INFO L111 eAbstractionObserver]: Analyzing ICFG list-ext_2.i [2021-08-27 05:50:37,776 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 05:50:37,777 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2021-08-27 05:50:37,811 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 05:50:37,816 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 05:50:37,817 INFO L340 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2021-08-27 05:50:37,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 92 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 05:50:37,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 05:50:37,840 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:37,840 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:50:37,841 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:37,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:37,857 INFO L82 PathProgramCache]: Analyzing trace with hash -234092837, now seen corresponding path program 1 times [2021-08-27 05:50:37,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:50:37,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275479988] [2021-08-27 05:50:37,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:37,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:50:37,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:38,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:50:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:38,096 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 05:50:38,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:50:38,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275479988] [2021-08-27 05:50:38,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275479988] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:38,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:38,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:50:38,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070698000] [2021-08-27 05:50:38,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 05:50:38,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:50:38,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 05:50:38,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:50:38,121 INFO L87 Difference]: Start difference. First operand has 98 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 92 states have internal predecessors, (106), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 05:50:38,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:38,323 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-08-27 05:50:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 05:50:38,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 05:50:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:38,331 INFO L225 Difference]: With dead ends: 98 [2021-08-27 05:50:38,332 INFO L226 Difference]: Without dead ends: 90 [2021-08-27 05:50:38,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 05:50:38,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-27 05:50:38,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-08-27 05:50:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 86 states have internal predecessors, (93), 2 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 05:50:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-08-27 05:50:38,374 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 11 [2021-08-27 05:50:38,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:38,375 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-08-27 05:50:38,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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 05:50:38,376 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-08-27 05:50:38,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-27 05:50:38,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:38,377 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:50:38,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 05:50:38,378 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:38,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:38,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1332069837, now seen corresponding path program 1 times [2021-08-27 05:50:38,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:50:38,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946428668] [2021-08-27 05:50:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:38,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:50:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:38,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:50:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:38,461 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 05:50:38,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:50:38,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946428668] [2021-08-27 05:50:38,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946428668] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:38,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:38,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:50:38,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084891316] [2021-08-27 05:50:38,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:50:38,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:50:38,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:50:38,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:50:38,464 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 05:50:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:38,696 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2021-08-27 05:50:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 05:50:38,696 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2021-08-27 05:50:38,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:38,700 INFO L225 Difference]: With dead ends: 111 [2021-08-27 05:50:38,700 INFO L226 Difference]: Without dead ends: 111 [2021-08-27 05:50:38,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:50:38,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-27 05:50:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2021-08-27 05:50:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 87 states have internal predecessors, (104), 2 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 05:50:38,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2021-08-27 05:50:38,715 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 12 [2021-08-27 05:50:38,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:38,715 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2021-08-27 05:50:38,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 05:50:38,716 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2021-08-27 05:50:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-27 05:50:38,716 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:38,716 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:50:38,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 05:50:38,717 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:38,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:38,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1332069838, now seen corresponding path program 1 times [2021-08-27 05:50:38,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:50:38,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026528697] [2021-08-27 05:50:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:38,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:50:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:38,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:50:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:38,858 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 05:50:38,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:50:38,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026528697] [2021-08-27 05:50:38,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026528697] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:38,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:38,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 05:50:38,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373591345] [2021-08-27 05:50:38,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 05:50:38,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:50:38,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 05:50:38,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:50:38,867 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 05:50:39,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:39,093 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-08-27 05:50:39,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:50:39,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 12 [2021-08-27 05:50:39,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:39,097 INFO L225 Difference]: With dead ends: 128 [2021-08-27 05:50:39,097 INFO L226 Difference]: Without dead ends: 128 [2021-08-27 05:50:39,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:50:39,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-27 05:50:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 111. [2021-08-27 05:50:39,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.5061728395061729) internal successors, (122), 107 states have internal predecessors, (122), 2 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 05:50:39,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2021-08-27 05:50:39,118 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 12 [2021-08-27 05:50:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:39,119 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2021-08-27 05:50:39,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 05:50:39,119 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2021-08-27 05:50:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 05:50:39,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:39,121 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:50:39,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 05:50:39,121 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:39,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:39,123 INFO L82 PathProgramCache]: Analyzing trace with hash 296118254, now seen corresponding path program 1 times [2021-08-27 05:50:39,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:50:39,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797266704] [2021-08-27 05:50:39,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:39,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:50:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:39,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:50:39,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:50:39,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:50:39,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797266704] [2021-08-27 05:50:39,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797266704] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:39,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:39,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 05:50:39,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622883408] [2021-08-27 05:50:39,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:50:39,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:50:39,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:50:39,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:50:39,265 INFO L87 Difference]: Start difference. First operand 111 states and 125 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, (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 05:50:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:39,637 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2021-08-27 05:50:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:50:39,638 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, (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 21 [2021-08-27 05:50:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:39,639 INFO L225 Difference]: With dead ends: 156 [2021-08-27 05:50:39,639 INFO L226 Difference]: Without dead ends: 156 [2021-08-27 05:50:39,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 05:50:39,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-08-27 05:50:39,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 115. [2021-08-27 05:50:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 86 states have (on average 1.5116279069767442) internal successors, (130), 111 states have internal predecessors, (130), 2 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 05:50:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2021-08-27 05:50:39,644 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 21 [2021-08-27 05:50:39,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:39,644 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2021-08-27 05:50:39,644 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, (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 05:50:39,644 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2021-08-27 05:50:39,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 05:50:39,645 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:39,645 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:50:39,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 05:50:39,646 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:39,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:39,646 INFO L82 PathProgramCache]: Analyzing trace with hash 296118255, now seen corresponding path program 1 times [2021-08-27 05:50:39,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:50:39,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849723236] [2021-08-27 05:50:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:39,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:50:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:39,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:50:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:50:39,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:50:39,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849723236] [2021-08-27 05:50:39,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849723236] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:39,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:39,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 05:50:39,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558146108] [2021-08-27 05:50:39,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:50:39,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:50:39,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:50:39,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:50:39,765 INFO L87 Difference]: Start difference. First operand 115 states and 133 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, (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 05:50:40,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:40,196 INFO L93 Difference]: Finished difference Result 159 states and 180 transitions. [2021-08-27 05:50:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 05:50:40,197 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, (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 21 [2021-08-27 05:50:40,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:40,198 INFO L225 Difference]: With dead ends: 159 [2021-08-27 05:50:40,198 INFO L226 Difference]: Without dead ends: 159 [2021-08-27 05:50:40,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-27 05:50:40,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-08-27 05:50:40,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 99. [2021-08-27 05:50:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 73 states have (on average 1.4794520547945205) internal successors, (108), 95 states have internal predecessors, (108), 2 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 05:50:40,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2021-08-27 05:50:40,202 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 21 [2021-08-27 05:50:40,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:40,203 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2021-08-27 05:50:40,203 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, (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 05:50:40,203 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2021-08-27 05:50:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 05:50:40,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:40,204 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] [2021-08-27 05:50:40,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 05:50:40,204 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:40,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:40,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1432577259, now seen corresponding path program 1 times [2021-08-27 05:50:40,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:50:40,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93519536] [2021-08-27 05:50:40,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:40,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:50:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:40,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:50:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:40,308 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 05:50:40,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:50:40,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93519536] [2021-08-27 05:50:40,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93519536] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:40,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:40,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 05:50:40,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008146901] [2021-08-27 05:50:40,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 05:50:40,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:50:40,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 05:50:40,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:50:40,310 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 05:50:40,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:40,565 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2021-08-27 05:50:40,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:50:40,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 22 [2021-08-27 05:50:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:40,569 INFO L225 Difference]: With dead ends: 191 [2021-08-27 05:50:40,569 INFO L226 Difference]: Without dead ends: 191 [2021-08-27 05:50:40,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:50:40,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-08-27 05:50:40,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 110. [2021-08-27 05:50:40,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 106 states have internal predecessors, (123), 2 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 05:50:40,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2021-08-27 05:50:40,579 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 22 [2021-08-27 05:50:40,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:40,579 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2021-08-27 05:50:40,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 05:50:40,579 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2021-08-27 05:50:40,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-27 05:50:40,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:40,582 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:50:40,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 05:50:40,583 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:40,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:40,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1350239013, now seen corresponding path program 1 times [2021-08-27 05:50:40,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:50:40,588 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309833128] [2021-08-27 05:50:40,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:40,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:50:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:40,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:50:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:50:40,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:50:40,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309833128] [2021-08-27 05:50:40,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309833128] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:40,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:40,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 05:50:40,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929718533] [2021-08-27 05:50:40,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:50:40,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:50:40,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:50:40,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:50:40,675 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 05:50:40,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:40,984 INFO L93 Difference]: Finished difference Result 138 states and 156 transitions. [2021-08-27 05:50:40,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 05:50:40,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 24 [2021-08-27 05:50:40,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:40,986 INFO L225 Difference]: With dead ends: 138 [2021-08-27 05:50:40,986 INFO L226 Difference]: Without dead ends: 138 [2021-08-27 05:50:40,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 05:50:40,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-27 05:50:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 108. [2021-08-27 05:50:40,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 104 states have internal predecessors, (121), 2 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 05:50:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2021-08-27 05:50:40,990 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 24 [2021-08-27 05:50:40,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:40,990 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2021-08-27 05:50:40,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 05:50:40,990 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2021-08-27 05:50:40,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-27 05:50:40,991 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:40,991 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:50:40,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 05:50:40,991 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:40,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1350239012, now seen corresponding path program 1 times [2021-08-27 05:50:40,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:50:40,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982754166] [2021-08-27 05:50:40,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:40,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:50:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:41,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:50:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:50:41,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:50:41,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982754166] [2021-08-27 05:50:41,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982754166] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:41,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:41,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 05:50:41,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149512102] [2021-08-27 05:50:41,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 05:50:41,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:50:41,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 05:50:41,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:50:41,094 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 05:50:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:41,451 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2021-08-27 05:50:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 05:50:41,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 24 [2021-08-27 05:50:41,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:41,452 INFO L225 Difference]: With dead ends: 136 [2021-08-27 05:50:41,452 INFO L226 Difference]: Without dead ends: 136 [2021-08-27 05:50:41,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-27 05:50:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-27 05:50:41,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2021-08-27 05:50:41,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 89 states have internal predecessors, (104), 2 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 05:50:41,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2021-08-27 05:50:41,456 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 24 [2021-08-27 05:50:41,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:41,456 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2021-08-27 05:50:41,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 05:50:41,456 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2021-08-27 05:50:41,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-27 05:50:41,457 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:41,457 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 05:50:41,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 05:50:41,458 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr26ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:41,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:41,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2025386131, now seen corresponding path program 1 times [2021-08-27 05:50:41,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:50:41,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856813731] [2021-08-27 05:50:41,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:41,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:50:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 05:50:41,472 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 05:50:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 05:50:41,504 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 05:50:41,505 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 05:50:41,505 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr26ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 05:50:41,507 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 05:50:41,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 05:50:41,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 05:50:41,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-08-27 05:50:41,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-08-27 05:50:41,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-08-27 05:50:41,509 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-08-27 05:50:41,509 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-08-27 05:50:41,509 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-08-27 05:50:41,509 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-08-27 05:50:41,509 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-08-27 05:50:41,510 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-08-27 05:50:41,510 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-08-27 05:50:41,510 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-08-27 05:50:41,510 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-08-27 05:50:41,510 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-08-27 05:50:41,510 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-08-27 05:50:41,511 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-08-27 05:50:41,511 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-08-27 05:50:41,511 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-08-27 05:50:41,511 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-08-27 05:50:41,511 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-08-27 05:50:41,511 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-08-27 05:50:41,512 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-08-27 05:50:41,512 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-08-27 05:50:41,512 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-08-27 05:50:41,512 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-08-27 05:50:41,512 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-08-27 05:50:41,512 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-08-27 05:50:41,512 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-08-27 05:50:41,513 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:50:41,513 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:50:41,513 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:50:41,513 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:50:41,513 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:50:41,514 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:50:41,514 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 05:50:41,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 05:50:41,519 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 05:50:41,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 05:50:41 BoogieIcfgContainer [2021-08-27 05:50:41,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 05:50:41,546 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 05:50:41,546 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 05:50:41,546 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 05:50:41,547 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:50:37" (3/4) ... [2021-08-27 05:50:41,550 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 05:50:41,550 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 05:50:41,551 INFO L168 Benchmark]: Toolchain (without parser) took 5011.30 ms. Allocated memory was 50.3 MB in the beginning and 130.0 MB in the end (delta: 79.7 MB). Free memory was 26.3 MB in the beginning and 107.5 MB in the end (delta: -81.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:50:41,552 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 50.3 MB. Free memory was 32.3 MB in the beginning and 32.3 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:50:41,552 INFO L168 Benchmark]: CACSL2BoogieTranslator took 455.74 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.1 MB in the beginning and 37.1 MB in the end (delta: -11.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-08-27 05:50:41,552 INFO L168 Benchmark]: Boogie Preprocessor took 57.38 ms. Allocated memory is still 60.8 MB. Free memory was 37.0 MB in the beginning and 34.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 05:50:41,552 INFO L168 Benchmark]: RCFGBuilder took 702.55 ms. Allocated memory is still 60.8 MB. Free memory was 34.1 MB in the beginning and 28.1 MB in the end (delta: 6.0 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. [2021-08-27 05:50:41,553 INFO L168 Benchmark]: TraceAbstraction took 3780.28 ms. Allocated memory was 60.8 MB in the beginning and 130.0 MB in the end (delta: 69.2 MB). Free memory was 27.8 MB in the beginning and 108.5 MB in the end (delta: -80.8 MB). Peak memory consumption was 49.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:50:41,553 INFO L168 Benchmark]: Witness Printer took 3.79 ms. Allocated memory is still 130.0 MB. Free memory was 108.5 MB in the beginning and 107.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:50:41,555 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 50.3 MB. Free memory was 32.3 MB in the beginning and 32.3 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 455.74 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 26.1 MB in the beginning and 37.1 MB in the end (delta: -11.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 57.38 ms. Allocated memory is still 60.8 MB. Free memory was 37.0 MB in the beginning and 34.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 702.55 ms. Allocated memory is still 60.8 MB. Free memory was 34.1 MB in the beginning and 28.1 MB in the end (delta: 6.0 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3780.28 ms. Allocated memory was 60.8 MB in the beginning and 130.0 MB in the end (delta: 69.2 MB). Free memory was 27.8 MB in the beginning and 108.5 MB in the end (delta: -80.8 MB). Peak memory consumption was 49.1 MB. Max. memory is 16.1 GB. * Witness Printer took 3.79 ms. Allocated memory is still 130.0 MB. Free memory was 108.5 MB in the beginning and 107.5 MB in the end (delta: 1.0 MB). There was no memory consumed. 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 - UnprovableResult [Line: 569]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 569. Possible FailurePath: [L533] int i = 0; [L534] int y = 0; [L535] List a = (List) malloc(sizeof(struct node)); [L536] COND FALSE !(a == 0) VAL [a={-1:0}, i=0, y=0] [L537] List t; [L538] List p = a; VAL [a={-1:0}, i=0, p={-1:0}, y=0] [L539] i < 10 && __VERIFIER_nondet_int() [L539] i < 10 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={-1:0}, i=0, i < 10 && __VERIFIER_nondet_int()=0, p={-1:0}, y=0] [L539] COND FALSE !(i < 10 && __VERIFIER_nondet_int()) [L547] y < 10 && __VERIFIER_nondet_int() [L547] y < 10 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={-1:0}, i=0, p={-1:0}, y=0, y < 10 && __VERIFIER_nondet_int()=0] [L547] COND FALSE !(y < 10 && __VERIFIER_nondet_int()) [L555] p->h = 3 VAL [a={-1:0}, i=0, p={-1:0}, y=0] [L556] p->n = (void*)__VERIFIER_nondet_ulong() VAL [__VERIFIER_nondet_ulong()=0, a={-1:0}, i=0, p={-1:0}, y=0] [L557] i = 0 [L558] y = 0 [L559] p = a VAL [a={-1:0}, i=0, p={-1:0}, y=0] [L560] EXPR p->h VAL [a={-1:0}, i=0, p={-1:0}, p->h=3, y=0] [L560] COND FALSE !(p->h == 1) [L564] EXPR p->h VAL [a={-1:0}, i=0, p={-1:0}, p->h=3, y=0] [L564] COND FALSE !(p->h == 2) [L568] EXPR p->h VAL [a={-1:0}, i=0, p={-1:0}, p->h=3, y=0] [L568] COND TRUE p->h != 3 || (i + y) < 20 [L569] reach_error() VAL [a={-1:0}, i=0, p={-1:0}, y=0] - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 117 locations, 38 error locations. Started 1 CEGAR loops. OverallTime: 3707.7ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 18.3ms, AutomataDifference: 2441.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 578 SDtfs, 865 SDslu, 1008 SDs, 0 SdLazy, 2288 SolverSat, 143 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1516.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 490.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=4, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 87.0ms AutomataMinimizationTime, 8 MinimizatonAttempts, 292 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 27.5ms SsaConstructionTime, 157.8ms SatisfiabilityAnalysisTime, 712.6ms InterpolantComputationTime, 171 NumberOfCodeBlocks, 171 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 139 ConstructedInterpolants, 0 QuantifiedInterpolants, 700 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 17/17 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-27 05:50:41,598 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... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 05:50:43,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 05:50:43,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 05:50:43,399 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 05:50:43,400 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 05:50:43,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 05:50:43,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 05:50:43,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 05:50:43,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 05:50:43,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 05:50:43,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 05:50:43,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 05:50:43,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 05:50:43,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 05:50:43,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 05:50:43,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 05:50:43,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 05:50:43,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 05:50:43,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 05:50:43,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 05:50:43,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 05:50:43,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 05:50:43,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 05:50:43,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 05:50:43,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 05:50:43,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 05:50:43,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 05:50:43,460 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 05:50:43,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 05:50:43,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 05:50:43,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 05:50:43,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 05:50:43,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 05:50:43,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 05:50:43,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 05:50:43,466 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 05:50:43,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 05:50:43,467 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 05:50:43,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 05:50:43,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 05:50:43,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 05:50:43,470 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-08-27 05:50:43,519 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 05:50:43,520 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 05:50:43,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 05:50:43,521 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 05:50:43,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 05:50:43,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 05:50:43,523 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 05:50:43,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 05:50:43,524 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 05:50:43,524 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 05:50:43,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 05:50:43,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 05:50:43,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 05:50:43,525 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 05:50:43,525 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 05:50:43,526 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 05:50:43,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 05:50:43,526 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 05:50:43,526 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-27 05:50:43,526 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-27 05:50:43,526 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 05:50:43,527 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 05:50:43,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 05:50:43,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 05:50:43,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 05:50:43,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:50:43,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 05:50:43,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 05:50:43,528 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-27 05:50:43,528 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-27 05:50:43,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 05:50:43,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-27 05:50:43,529 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6c9e5ba66547a8817cc7b16e9df45177efa4b55 [2021-08-27 05:50:43,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 05:50:43,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 05:50:43,848 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 05:50:43,849 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 05:50:43,850 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 05:50:43,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/list-ext_2.i [2021-08-27 05:50:43,912 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c974a6242/8ca763aadbef40a9bff316f9c0c7ca6d/FLAG91f93715d [2021-08-27 05:50:44,361 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 05:50:44,362 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/list-ext_2.i [2021-08-27 05:50:44,377 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c974a6242/8ca763aadbef40a9bff316f9c0c7ca6d/FLAG91f93715d [2021-08-27 05:50:44,688 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c974a6242/8ca763aadbef40a9bff316f9c0c7ca6d [2021-08-27 05:50:44,691 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 05:50:44,693 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 05:50:44,695 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 05:50:44,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 05:50:44,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 05:50:44,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:50:44" (1/1) ... [2021-08-27 05:50:44,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51876d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:44, skipping insertion in model container [2021-08-27 05:50:44,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:50:44" (1/1) ... [2021-08-27 05:50:44,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 05:50:44,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 05:50:45,056 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/list-ext_2.i[23625,23638] [2021-08-27 05:50:45,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:50:45,086 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 05:50:45,137 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/list-ext_2.i[23625,23638] [2021-08-27 05:50:45,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:50:45,177 INFO L208 MainTranslator]: Completed translation [2021-08-27 05:50:45,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:45 WrapperNode [2021-08-27 05:50:45,179 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 05:50:45,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 05:50:45,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 05:50:45,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 05:50:45,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:45" (1/1) ... [2021-08-27 05:50:45,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:45" (1/1) ... [2021-08-27 05:50:45,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:45" (1/1) ... [2021-08-27 05:50:45,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:45" (1/1) ... [2021-08-27 05:50:45,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:45" (1/1) ... [2021-08-27 05:50:45,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:45" (1/1) ... [2021-08-27 05:50:45,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:45" (1/1) ... [2021-08-27 05:50:45,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 05:50:45,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 05:50:45,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 05:50:45,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 05:50:45,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:45" (1/1) ... [2021-08-27 05:50:45,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:50:45,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:50:45,306 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 05:50:45,344 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 05:50:45,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 05:50:45,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 05:50:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-08-27 05:50:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 05:50:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 05:50:45,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 05:50:45,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 05:50:45,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 05:50:45,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 05:50:45,363 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-27 05:50:45,363 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 05:50:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 05:50:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 05:50:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 05:50:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 05:50:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 05:50:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 05:50:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 05:50:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2021-08-27 05:50:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 05:50:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 05:50:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 05:50:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 05:50:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 05:50:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 05:50:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 05:50:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 05:50:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 05:50:45,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 05:50:45,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 05:50:45,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 05:50:45,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 05:50:45,366 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 05:50:45,366 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 05:50:45,367 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 05:50:45,367 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 05:50:45,367 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 05:50:45,367 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 05:50:45,367 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 05:50:45,367 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 05:50:45,368 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 05:50:45,368 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 05:50:45,368 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 05:50:45,368 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 05:50:45,369 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 05:50:45,369 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 05:50:45,369 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 05:50:45,370 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 05:50:45,370 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 05:50:45,370 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 05:50:45,370 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 05:50:45,370 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 05:50:45,370 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 05:50:45,370 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 05:50:45,371 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 05:50:45,371 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 05:50:45,371 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 05:50:45,371 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 05:50:45,372 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 05:50:45,372 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 05:50:45,372 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 05:50:45,373 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 05:50:45,373 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 05:50:45,374 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 05:50:45,374 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 05:50:45,375 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 05:50:45,375 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 05:50:45,375 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 05:50:45,375 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 05:50:45,375 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 05:50:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 05:50:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 05:50:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 05:50:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 05:50:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 05:50:45,376 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 05:50:45,377 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 05:50:45,377 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 05:50:45,377 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 05:50:45,378 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 05:50:45,378 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 05:50:45,378 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 05:50:45,378 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 05:50:45,378 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 05:50:45,379 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 05:50:45,379 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 05:50:45,387 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 05:50:45,387 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 05:50:45,387 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 05:50:45,387 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 05:50:45,387 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 05:50:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 05:50:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 05:50:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 05:50:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 05:50:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 05:50:45,388 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 05:50:45,389 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 05:50:45,389 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 05:50:45,389 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 05:50:45,389 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 05:50:45,389 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 05:50:45,390 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 05:50:45,390 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 05:50:45,390 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 05:50:45,390 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 05:50:45,390 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 05:50:45,390 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 05:50:45,391 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 05:50:45,391 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 05:50:45,391 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 05:50:45,391 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 05:50:45,391 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 05:50:45,391 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 05:50:45,392 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 05:50:45,392 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 05:50:45,392 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 05:50:45,392 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 05:50:45,392 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 05:50:45,392 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 05:50:45,393 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 05:50:45,393 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 05:50:45,393 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 05:50:45,394 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 05:50:45,394 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 05:50:45,396 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-27 05:50:45,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 05:50:45,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 05:50:45,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-27 05:50:45,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 05:50:45,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 05:50:45,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-27 05:50:45,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 05:50:45,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 05:50:45,406 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-27 05:50:45,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 05:50:45,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-08-27 05:50:45,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-08-27 05:50:45,407 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-08-27 05:50:45,833 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-27 05:50:46,207 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 05:50:46,207 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-27 05:50:46,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:50:46 BoogieIcfgContainer [2021-08-27 05:50:46,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 05:50:46,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 05:50:46,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 05:50:46,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 05:50:46,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:50:44" (1/3) ... [2021-08-27 05:50:46,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8ffb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:50:46, skipping insertion in model container [2021-08-27 05:50:46,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:50:45" (2/3) ... [2021-08-27 05:50:46,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8ffb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:50:46, skipping insertion in model container [2021-08-27 05:50:46,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:50:46" (3/3) ... [2021-08-27 05:50:46,216 INFO L111 eAbstractionObserver]: Analyzing ICFG list-ext_2.i [2021-08-27 05:50:46,220 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 05:50:46,221 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2021-08-27 05:50:46,256 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 05:50:46,261 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 05:50:46,261 INFO L340 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2021-08-27 05:50:46,273 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 88 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 05:50:46,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 05:50:46,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:46,280 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:50:46,280 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:46,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1300184920, now seen corresponding path program 1 times [2021-08-27 05:50:46,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:50:46,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179363648] [2021-08-27 05:50:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:46,296 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:50:46,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:50:46,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:50:46,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-27 05:50:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:46,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 05:50:46,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:50:46,648 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:50:46,699 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 05:50:46,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:50:46,785 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 05:50:46,786 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:50:46,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179363648] [2021-08-27 05:50:46,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179363648] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:46,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:46,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-08-27 05:50:46,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464074902] [2021-08-27 05:50:46,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:50:46,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:50:46,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:50:46,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:50:46,812 INFO L87 Difference]: Start difference. First operand has 94 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 88 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 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 05:50:47,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:47,198 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2021-08-27 05:50:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:50:47,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 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 10 [2021-08-27 05:50:47,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:47,205 INFO L225 Difference]: With dead ends: 111 [2021-08-27 05:50:47,205 INFO L226 Difference]: Without dead ends: 103 [2021-08-27 05:50:47,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:50:47,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-27 05:50:47,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2021-08-27 05:50:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 79 states have internal predecessors, (92), 2 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 05:50:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2021-08-27 05:50:47,235 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 10 [2021-08-27 05:50:47,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:47,236 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2021-08-27 05:50:47,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 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 05:50:47,236 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2021-08-27 05:50:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 05:50:47,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:47,236 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:50:47,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-27 05:50:47,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:50:47,446 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:47,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:47,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1300184921, now seen corresponding path program 1 times [2021-08-27 05:50:47,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:50:47,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92947629] [2021-08-27 05:50:47,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:47,447 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:50:47,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:50:47,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:50:47,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-27 05:50:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:47,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 05:50:47,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:50:47,648 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:50:47,735 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 05:50:47,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:50:47,890 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 05:50:47,890 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:50:47,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92947629] [2021-08-27 05:50:47,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92947629] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:47,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:47,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-08-27 05:50:47,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108712603] [2021-08-27 05:50:47,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:50:47,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:50:47,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:50:47,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:50:47,894 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 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 05:50:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:48,444 INFO L93 Difference]: Finished difference Result 119 states and 127 transitions. [2021-08-27 05:50:48,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:50:48,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 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 10 [2021-08-27 05:50:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:48,446 INFO L225 Difference]: With dead ends: 119 [2021-08-27 05:50:48,446 INFO L226 Difference]: Without dead ends: 119 [2021-08-27 05:50:48,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-27 05:50:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-27 05:50:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2021-08-27 05:50:48,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 72 states have (on average 1.4861111111111112) internal successors, (107), 97 states have internal predecessors, (107), 2 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 05:50:48,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2021-08-27 05:50:48,454 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 10 [2021-08-27 05:50:48,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:48,454 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2021-08-27 05:50:48,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 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 05:50:48,455 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2021-08-27 05:50:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 05:50:48,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:48,455 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:50:48,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-27 05:50:48,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:50:48,664 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:48,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:48,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1952159409, now seen corresponding path program 1 times [2021-08-27 05:50:48,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:50:48,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1633760576] [2021-08-27 05:50:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:48,666 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:50:48,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:50:48,667 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:50:48,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-27 05:50:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:48,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 05:50:48,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:50:48,864 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:50:48,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-27 05:50:48,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-27 05:50:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:50:48,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:50:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:50:49,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:50:49,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1633760576] [2021-08-27 05:50:49,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1633760576] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:49,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:49,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-08-27 05:50:49,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136650852] [2021-08-27 05:50:49,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:50:49,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:50:49,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:50:49,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:50:49,045 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 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 05:50:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:49,596 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2021-08-27 05:50:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:50:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 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 17 [2021-08-27 05:50:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:49,598 INFO L225 Difference]: With dead ends: 140 [2021-08-27 05:50:49,598 INFO L226 Difference]: Without dead ends: 140 [2021-08-27 05:50:49,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:50:49,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-08-27 05:50:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2021-08-27 05:50:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.4933333333333334) internal successors, (112), 99 states have internal predecessors, (112), 2 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 05:50:49,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-08-27 05:50:49,606 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 17 [2021-08-27 05:50:49,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:49,606 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-08-27 05:50:49,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 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 05:50:49,606 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-08-27 05:50:49,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 05:50:49,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:49,607 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:50:49,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-27 05:50:49,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:50:49,808 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:49,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:49,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1952159408, now seen corresponding path program 1 times [2021-08-27 05:50:49,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:50:49,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2080239377] [2021-08-27 05:50:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:49,809 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:50:49,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:50:49,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:50:49,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-27 05:50:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:49,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 05:50:49,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:50:50,021 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:50:50,056 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 13 treesize of output 9 [2021-08-27 05:50:50,065 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 19 treesize of output 15 [2021-08-27 05:50:50,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-08-27 05:50:50,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-08-27 05:50:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:50:50,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:50:50,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:50:50,441 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:50:50,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2080239377] [2021-08-27 05:50:50,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2080239377] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:50,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:50,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-08-27 05:50:50,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584190] [2021-08-27 05:50:50,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 05:50:50,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:50:50,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 05:50:50,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 05:50:50,444 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 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 05:50:51,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:51,810 INFO L93 Difference]: Finished difference Result 145 states and 159 transitions. [2021-08-27 05:50:51,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:50:51,821 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 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 17 [2021-08-27 05:50:51,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:51,825 INFO L225 Difference]: With dead ends: 145 [2021-08-27 05:50:51,826 INFO L226 Difference]: Without dead ends: 145 [2021-08-27 05:50:51,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 348.2ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-27 05:50:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-27 05:50:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 91. [2021-08-27 05:50:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 87 states have internal predecessors, (96), 2 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 05:50:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2021-08-27 05:50:51,860 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 17 [2021-08-27 05:50:51,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:51,860 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2021-08-27 05:50:51,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 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 05:50:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2021-08-27 05:50:51,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 05:50:51,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:51,862 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:50:51,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-27 05:50:52,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:50:52,071 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:52,072 INFO L82 PathProgramCache]: Analyzing trace with hash -2002045966, now seen corresponding path program 1 times [2021-08-27 05:50:52,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:50:52,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164032768] [2021-08-27 05:50:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:52,072 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:50:52,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:50:52,075 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:50:52,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-27 05:50:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:52,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 05:50:52,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:50:52,308 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 11 treesize of output 7 [2021-08-27 05:50:52,353 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-27 05:50:52,354 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 27 treesize of output 11 [2021-08-27 05:50:52,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 05:50:52,411 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 05:50:52,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:50:52,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 140 [2021-08-27 05:50:52,651 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 05:50:52,651 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:50:52,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164032768] [2021-08-27 05:50:52,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164032768] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:52,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:52,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-08-27 05:50:52,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943585275] [2021-08-27 05:50:52,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 05:50:52,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:50:52,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 05:50:52,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-27 05:50:52,656 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (2), 1 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 05:50:53,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:53,267 INFO L93 Difference]: Finished difference Result 192 states and 204 transitions. [2021-08-27 05:50:53,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 05:50:53,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (2), 1 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 18 [2021-08-27 05:50:53,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:53,269 INFO L225 Difference]: With dead ends: 192 [2021-08-27 05:50:53,269 INFO L226 Difference]: Without dead ends: 192 [2021-08-27 05:50:53,269 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-08-27 05:50:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-27 05:50:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 98. [2021-08-27 05:50:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 94 states have internal predecessors, (105), 2 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 05:50:53,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-08-27 05:50:53,292 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 18 [2021-08-27 05:50:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:53,293 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-08-27 05:50:53,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (2), 1 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 05:50:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-08-27 05:50:53,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 05:50:53,294 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:53,294 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:50:53,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-27 05:50:53,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:50:53,504 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:53,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1259494057, now seen corresponding path program 1 times [2021-08-27 05:50:53,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:50:53,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148015127] [2021-08-27 05:50:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:53,505 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:50:53,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:50:53,506 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:50:53,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-27 05:50:53,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:53,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 05:50:53,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:50:53,717 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:50:53,752 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 19 treesize of output 15 [2021-08-27 05:50:53,761 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 13 treesize of output 9 [2021-08-27 05:50:53,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-08-27 05:50:53,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-08-27 05:50:53,846 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 05:50:53,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:50:54,139 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 05:50:54,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:50:54,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148015127] [2021-08-27 05:50:54,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148015127] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:54,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:54,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-08-27 05:50:54,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021420215] [2021-08-27 05:50:54,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 05:50:54,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:50:54,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 05:50:54,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 05:50:54,142 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 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 05:50:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:55,255 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2021-08-27 05:50:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 05:50:55,256 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 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 18 [2021-08-27 05:50:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:55,257 INFO L225 Difference]: With dead ends: 124 [2021-08-27 05:50:55,257 INFO L226 Difference]: Without dead ends: 124 [2021-08-27 05:50:55,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 350.1ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-27 05:50:55,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-08-27 05:50:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 88. [2021-08-27 05:50:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 68 states have (on average 1.3970588235294117) internal successors, (95), 84 states have internal predecessors, (95), 2 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 05:50:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2021-08-27 05:50:55,261 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 18 [2021-08-27 05:50:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:55,265 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2021-08-27 05:50:55,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 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 05:50:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2021-08-27 05:50:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 05:50:55,267 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:55,267 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:50:55,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-27 05:50:55,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:50:55,477 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:55,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:55,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1259494058, now seen corresponding path program 1 times [2021-08-27 05:50:55,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:50:55,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057380971] [2021-08-27 05:50:55,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:55,478 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:50:55,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:50:55,479 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:50:55,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-27 05:50:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:50:55,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 05:50:55,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 05:50:55,723 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 05:50:55,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-27 05:50:55,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-27 05:50:55,795 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 05:50:55,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 05:50:55,873 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 05:50:55,873 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 05:50:55,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057380971] [2021-08-27 05:50:55,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057380971] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 05:50:55,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:50:55,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-08-27 05:50:55,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221397111] [2021-08-27 05:50:55,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:50:55,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 05:50:55,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:50:55,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:50:55,876 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 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 05:50:56,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:50:56,238 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2021-08-27 05:50:56,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 05:50:56,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 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 18 [2021-08-27 05:50:56,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:50:56,239 INFO L225 Difference]: With dead ends: 113 [2021-08-27 05:50:56,239 INFO L226 Difference]: Without dead ends: 113 [2021-08-27 05:50:56,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-27 05:50:56,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-27 05:50:56,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2021-08-27 05:50:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 79 states have internal predecessors, (89), 2 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 05:50:56,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2021-08-27 05:50:56,243 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 18 [2021-08-27 05:50:56,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:50:56,243 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2021-08-27 05:50:56,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 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 05:50:56,244 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2021-08-27 05:50:56,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 05:50:56,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:50:56,245 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] [2021-08-27 05:50:56,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-27 05:50:56,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:50:56,456 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr26ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 33 more)] === [2021-08-27 05:50:56,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:50:56,456 INFO L82 PathProgramCache]: Analyzing trace with hash 131545524, now seen corresponding path program 1 times [2021-08-27 05:50:56,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 05:50:56,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458122199] [2021-08-27 05:50:56,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:50:56,457 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 05:50:56,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 05:50:56,457 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 05:50:56,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-27 05:50:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 05:50:56,660 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 05:50:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 05:50:56,734 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-27 05:50:56,735 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 05:50:56,736 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr26ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 05:50:56,737 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 05:50:56,737 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 05:50:56,738 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 05:50:56,738 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-08-27 05:50:56,738 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-08-27 05:50:56,738 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-08-27 05:50:56,738 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-08-27 05:50:56,738 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-08-27 05:50:56,738 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-08-27 05:50:56,739 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-08-27 05:50:56,739 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-08-27 05:50:56,739 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-08-27 05:50:56,739 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-08-27 05:50:56,739 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-08-27 05:50:56,739 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-08-27 05:50:56,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-08-27 05:50:56,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-08-27 05:50:56,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-08-27 05:50:56,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-08-27 05:50:56,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-08-27 05:50:56,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-08-27 05:50:56,740 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-08-27 05:50:56,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-08-27 05:50:56,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-08-27 05:50:56,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-08-27 05:50:56,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-08-27 05:50:56,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-08-27 05:50:56,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-08-27 05:50:56,741 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-08-27 05:50:56,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-08-27 05:50:56,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:50:56,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:50:56,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:50:56,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:50:56,742 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:50:56,743 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:50:56,743 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 05:50:56,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-08-27 05:50:56,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 05:50:56,951 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 05:50:56,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 05:50:56 BoogieIcfgContainer [2021-08-27 05:50:56,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 05:50:56,969 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 05:50:56,969 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 05:50:56,969 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 05:50:56,970 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:50:46" (3/4) ... [2021-08-27 05:50:56,973 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 05:50:56,973 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 05:50:56,974 INFO L168 Benchmark]: Toolchain (without parser) took 12281.22 ms. Allocated memory was 65.0 MB in the beginning and 117.4 MB in the end (delta: 52.4 MB). Free memory was 43.6 MB in the beginning and 84.3 MB in the end (delta: -40.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. [2021-08-27 05:50:56,974 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 45.8 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:50:56,975 INFO L168 Benchmark]: CACSL2BoogieTranslator took 484.03 ms. Allocated memory is still 65.0 MB. Free memory was 43.5 MB in the beginning and 39.2 MB in the end (delta: 4.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-27 05:50:56,975 INFO L168 Benchmark]: Boogie Preprocessor took 95.89 ms. Allocated memory is still 65.0 MB. Free memory was 39.0 MB in the beginning and 36.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:50:56,975 INFO L168 Benchmark]: RCFGBuilder took 933.13 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 35.9 MB in the beginning and 49.7 MB in the end (delta: -13.8 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. [2021-08-27 05:50:56,976 INFO L168 Benchmark]: TraceAbstraction took 10758.04 ms. Allocated memory was 79.7 MB in the beginning and 117.4 MB in the end (delta: 37.7 MB). Free memory was 49.2 MB in the beginning and 84.3 MB in the end (delta: -35.1 MB). Peak memory consumption was 2.4 MB. Max. memory is 16.1 GB. [2021-08-27 05:50:56,976 INFO L168 Benchmark]: Witness Printer took 4.05 ms. Allocated memory is still 117.4 MB. Free memory is still 84.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:50:56,978 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 45.8 MB in the end (delta: 31.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 484.03 ms. Allocated memory is still 65.0 MB. Free memory was 43.5 MB in the beginning and 39.2 MB in the end (delta: 4.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 95.89 ms. Allocated memory is still 65.0 MB. Free memory was 39.0 MB in the beginning and 36.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 933.13 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 35.9 MB in the beginning and 49.7 MB in the end (delta: -13.8 MB). Peak memory consumption was 20.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10758.04 ms. Allocated memory was 79.7 MB in the beginning and 117.4 MB in the end (delta: 37.7 MB). Free memory was 49.2 MB in the beginning and 84.3 MB in the end (delta: -35.1 MB). Peak memory consumption was 2.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.05 ms. Allocated memory is still 117.4 MB. Free memory is still 84.3 MB. There was no memory consumed. 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 - UnprovableResult [Line: 569]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 569. Possible FailurePath: [L533] int i = 0; [L534] int y = 0; [L535] List a = (List) malloc(sizeof(struct node)); [L536] COND FALSE !(a == 0) VAL [a={1:0}, i=0, y=0] [L537] List t; [L538] List p = a; VAL [a={1:0}, i=0, p={1:0}, y=0] [L539] COND FALSE !(i < 10 && __VERIFIER_nondet_int()) [L547] COND FALSE !(y < 10 && __VERIFIER_nondet_int()) [L555] p->h = 3 VAL [a={1:0}, i=0, p={1:0}, y=0] [L556] p->n = (void*)__VERIFIER_nondet_ulong() VAL [__VERIFIER_nondet_ulong()=0, a={1:0}, i=0, p={1:0}, y=0] [L557] i = 0 [L558] y = 0 [L559] p = a VAL [a={1:0}, i=0, p={1:0}, y=0] [L560] EXPR p->h VAL [a={1:0}, i=0, p={1:0}, p->h=3, y=0] [L560] COND FALSE !(p->h == 1) [L564] EXPR p->h VAL [a={1:0}, i=0, p={1:0}, p->h=3, y=0] [L564] COND FALSE !(p->h == 2) [L568] EXPR p->h VAL [a={1:0}, i=0, p={1:0}, p->h=3, y=0] [L568] COND TRUE p->h != 3 || (i + y) < 20 [L569] reach_error() VAL [a={1:0}, i=0, p={1:0}, y=0] - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 549]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 560]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 562]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 564]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 571]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 572]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 573]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 532]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 119 locations, 38 error locations. Started 1 CEGAR loops. OverallTime: 10694.7ms, OverallIterations: 8, TraceHistogramMax: 2, EmptinessCheckTime: 14.3ms, AutomataDifference: 5003.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 406 SDtfs, 1052 SDslu, 1045 SDs, 0 SdLazy, 1679 SolverSat, 191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3553.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 239 GetRequests, 169 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1160.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=3, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 95.3ms AutomataMinimizationTime, 7 MinimizatonAttempts, 289 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 79.1ms SsaConstructionTime, 230.8ms SatisfiabilityAnalysisTime, 2276.4ms InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 202 ConstructedInterpolants, 1 QuantifiedInterpolants, 1010 SizeOfPredicates, 31 NumberOfNonLiveVariables, 613 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 14/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-27 05:50:57,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...