./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-properties/simple-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-properties/simple-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 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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-properties/simple-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 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 06:50:35,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 06:50:36,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 06:50:36,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 06:50:36,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 06:50:36,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 06:50:36,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 06:50:36,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 06:50:36,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 06:50:36,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 06:50:36,037 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 06:50:36,038 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 06:50:36,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 06:50:36,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 06:50:36,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 06:50:36,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 06:50:36,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 06:50:36,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 06:50:36,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 06:50:36,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 06:50:36,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 06:50:36,059 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 06:50:36,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 06:50:36,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 06:50:36,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 06:50:36,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 06:50:36,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 06:50:36,083 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 06:50:36,083 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 06:50:36,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 06:50:36,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 06:50:36,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 06:50:36,085 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 06:50:36,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 06:50:36,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 06:50:36,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 06:50:36,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 06:50:36,087 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 06:50:36,087 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 06:50:36,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 06:50:36,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 06:50:36,089 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 06:50:36,108 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 06:50:36,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 06:50:36,111 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 06:50:36,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 06:50:36,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 06:50:36,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 06:50:36,113 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 06:50:36,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 06:50:36,113 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 06:50:36,113 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 06:50:36,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 06:50:36,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 06:50:36,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 06:50:36,114 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 06:50:36,114 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 06:50:36,114 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 06:50:36,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 06:50:36,115 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 06:50:36,115 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 06:50:36,115 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 06:50:36,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 06:50:36,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 06:50:36,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 06:50:36,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:50:36,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 06:50:36,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 06:50:36,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 06:50:36,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 06:50:36,116 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 06:50:36,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 [2021-08-27 06:50:36,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 06:50:36,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 06:50:36,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 06:50:36,405 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 06:50:36,405 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 06:50:36,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-2.i [2021-08-27 06:50:36,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0a801c03/dacee525c48b483baab5311ae91f26d6/FLAG30fd751a9 [2021-08-27 06:50:36,838 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 06:50:36,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i [2021-08-27 06:50:36,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0a801c03/dacee525c48b483baab5311ae91f26d6/FLAG30fd751a9 [2021-08-27 06:50:37,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0a801c03/dacee525c48b483baab5311ae91f26d6 [2021-08-27 06:50:37,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 06:50:37,223 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 06:50:37,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 06:50:37,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 06:50:37,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 06:50:37,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:50:37" (1/1) ... [2021-08-27 06:50:37,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18bf4aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:37, skipping insertion in model container [2021-08-27 06:50:37,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:50:37" (1/1) ... [2021-08-27 06:50:37,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 06:50:37,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 06:50:37,434 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-properties/simple-2.i[23225,23238] [2021-08-27 06:50:37,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:50:37,445 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 06:50:37,499 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-properties/simple-2.i[23225,23238] [2021-08-27 06:50:37,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:50:37,529 INFO L208 MainTranslator]: Completed translation [2021-08-27 06:50:37,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:37 WrapperNode [2021-08-27 06:50:37,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 06:50:37,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 06:50:37,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 06:50:37,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 06:50:37,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:37" (1/1) ... [2021-08-27 06:50:37,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:37" (1/1) ... [2021-08-27 06:50:37,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:37" (1/1) ... [2021-08-27 06:50:37,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:37" (1/1) ... [2021-08-27 06:50:37,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:37" (1/1) ... [2021-08-27 06:50:37,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:37" (1/1) ... [2021-08-27 06:50:37,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:37" (1/1) ... [2021-08-27 06:50:37,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 06:50:37,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 06:50:37,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 06:50:37,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 06:50:37,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:37" (1/1) ... [2021-08-27 06:50:37,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:50:37,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:50:37,593 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 06:50:37,595 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 06:50:37,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 06:50:37,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 06:50:37,625 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 06:50:37,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 06:50:37,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 06:50:37,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 06:50:37,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 06:50:37,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 06:50:37,625 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-27 06:50:37,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 06:50:37,626 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 06:50:37,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 06:50:37,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 06:50:37,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 06:50:37,626 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 06:50:37,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 06:50:37,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 06:50:37,627 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 06:50:37,627 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 06:50:37,627 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 06:50:37,627 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 06:50:37,627 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 06:50:37,627 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 06:50:37,627 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 06:50:37,627 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 06:50:37,627 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 06:50:37,628 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 06:50:37,628 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 06:50:37,628 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 06:50:37,628 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 06:50:37,628 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 06:50:37,628 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 06:50:37,628 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 06:50:37,628 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 06:50:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 06:50:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 06:50:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 06:50:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 06:50:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 06:50:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 06:50:37,629 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 06:50:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 06:50:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 06:50:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 06:50:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 06:50:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 06:50:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 06:50:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 06:50:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 06:50:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 06:50:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 06:50:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 06:50:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 06:50:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 06:50:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 06:50:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 06:50:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 06:50:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 06:50:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 06:50:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 06:50:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 06:50:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 06:50:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 06:50:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 06:50:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 06:50:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 06:50:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 06:50:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 06:50:37,633 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 06:50:37,633 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 06:50:37,633 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 06:50:37,633 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 06:50:37,633 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 06:50:37,633 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 06:50:37,633 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 06:50:37,633 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 06:50:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 06:50:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 06:50:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 06:50:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 06:50:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 06:50:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 06:50:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 06:50:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 06:50:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 06:50:37,635 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 06:50:37,636 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 06:50:37,636 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 06:50:37,636 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 06:50:37,636 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 06:50:37,636 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 06:50:37,636 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 06:50:37,636 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 06:50:37,636 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 06:50:37,636 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 06:50:37,636 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 06:50:37,637 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 06:50:37,637 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 06:50:37,637 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 06:50:37,637 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 06:50:37,637 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 06:50:37,637 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 06:50:37,637 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 06:50:37,637 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 06:50:37,637 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 06:50:37,638 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 06:50:37,638 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-27 06:50:37,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 06:50:37,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 06:50:37,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 06:50:37,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 06:50:37,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 06:50:37,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 06:50:37,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 06:50:37,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 06:50:37,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 06:50:37,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 06:50:37,904 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-27 06:50:37,995 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 06:50:37,995 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-27 06:50:37,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:37 BoogieIcfgContainer [2021-08-27 06:50:37,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 06:50:37,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 06:50:37,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 06:50:38,000 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 06:50:38,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 06:50:37" (1/3) ... [2021-08-27 06:50:38,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a66282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:50:38, skipping insertion in model container [2021-08-27 06:50:38,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:37" (2/3) ... [2021-08-27 06:50:38,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a66282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:50:38, skipping insertion in model container [2021-08-27 06:50:38,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:37" (3/3) ... [2021-08-27 06:50:38,002 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-08-27 06:50:38,005 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 06:50:38,005 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-08-27 06:50:38,035 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 06:50:38,039 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 06:50:38,039 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-08-27 06:50:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 44 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:50:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 06:50:38,052 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:38,052 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:38,052 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:38,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:38,056 INFO L82 PathProgramCache]: Analyzing trace with hash 875395723, now seen corresponding path program 1 times [2021-08-27 06:50:38,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:38,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105003892] [2021-08-27 06:50:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:38,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:38,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:38,256 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 06:50:38,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:38,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105003892] [2021-08-27 06:50:38,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105003892] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:38,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:38,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 06:50:38,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007259617] [2021-08-27 06:50:38,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 06:50:38,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:38,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 06:50:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 06:50:38,280 INFO L87 Difference]: Start difference. First operand has 50 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 44 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 06:50:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:38,371 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-08-27 06:50:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 06:50:38,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 10 [2021-08-27 06:50:38,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:38,377 INFO L225 Difference]: With dead ends: 50 [2021-08-27 06:50:38,377 INFO L226 Difference]: Without dead ends: 43 [2021-08-27 06:50:38,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 06:50:38,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-27 06:50:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-08-27 06:50:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 39 states have internal predecessors, (41), 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 06:50:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-08-27 06:50:38,403 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 10 [2021-08-27 06:50:38,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:38,404 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-08-27 06:50:38,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 06:50:38,405 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-08-27 06:50:38,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 06:50:38,405 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:38,405 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:38,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 06:50:38,406 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:38,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:38,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1367438898, now seen corresponding path program 1 times [2021-08-27 06:50:38,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:38,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084476774] [2021-08-27 06:50:38,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:38,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:38,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:38,504 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 06:50:38,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:38,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084476774] [2021-08-27 06:50:38,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084476774] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:38,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:38,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:50:38,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990321115] [2021-08-27 06:50:38,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:50:38,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:38,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:50:38,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:38,508 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:38,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:38,618 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-08-27 06:50:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:50:38,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 06:50:38,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:38,619 INFO L225 Difference]: With dead ends: 51 [2021-08-27 06:50:38,619 INFO L226 Difference]: Without dead ends: 51 [2021-08-27 06:50:38,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:38,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-27 06:50:38,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2021-08-27 06:50:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.6) internal successors, (48), 41 states have internal predecessors, (48), 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 06:50:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-08-27 06:50:38,623 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 11 [2021-08-27 06:50:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:38,624 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-08-27 06:50:38,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-08-27 06:50:38,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 06:50:38,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:38,625 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:38,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 06:50:38,625 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:38,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:38,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1367438899, now seen corresponding path program 1 times [2021-08-27 06:50:38,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:38,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379933968] [2021-08-27 06:50:38,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:38,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:38,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:38,689 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 06:50:38,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:38,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379933968] [2021-08-27 06:50:38,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379933968] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:38,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:38,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:50:38,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950039964] [2021-08-27 06:50:38,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:50:38,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:38,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:50:38,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:38,691 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:38,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:38,783 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-08-27 06:50:38,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:50:38,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 06:50:38,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:38,785 INFO L225 Difference]: With dead ends: 60 [2021-08-27 06:50:38,785 INFO L226 Difference]: Without dead ends: 60 [2021-08-27 06:50:38,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:38,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-27 06:50:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2021-08-27 06:50:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.4324324324324325) internal successors, (53), 48 states have internal predecessors, (53), 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 06:50:38,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-08-27 06:50:38,799 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 11 [2021-08-27 06:50:38,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:38,799 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-08-27 06:50:38,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:38,799 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-08-27 06:50:38,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 06:50:38,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:38,800 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:38,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 06:50:38,800 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr15ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:38,801 INFO L82 PathProgramCache]: Analyzing trace with hash 707569559, now seen corresponding path program 1 times [2021-08-27 06:50:38,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:38,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726118838] [2021-08-27 06:50:38,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:38,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:38,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:38,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:38,871 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 06:50:38,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:38,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726118838] [2021-08-27 06:50:38,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726118838] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:38,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:38,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 06:50:38,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524009325] [2021-08-27 06:50:38,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:50:38,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:38,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:50:38,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:38,874 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 06:50:38,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:38,937 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-08-27 06:50:38,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:50:38,939 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 16 [2021-08-27 06:50:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:38,939 INFO L225 Difference]: With dead ends: 57 [2021-08-27 06:50:38,939 INFO L226 Difference]: Without dead ends: 57 [2021-08-27 06:50:38,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:38,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-27 06:50:38,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2021-08-27 06:50:38,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 48 states have internal predecessors, (52), 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 06:50:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-08-27 06:50:38,943 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 16 [2021-08-27 06:50:38,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:38,943 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-08-27 06:50:38,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 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 06:50:38,943 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-08-27 06:50:38,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 06:50:38,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:38,943 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:38,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 06:50:38,944 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:38,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:38,944 INFO L82 PathProgramCache]: Analyzing trace with hash 459860759, now seen corresponding path program 1 times [2021-08-27 06:50:38,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:38,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793428914] [2021-08-27 06:50:38,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:38,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:39,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:39,042 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 06:50:39,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:39,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793428914] [2021-08-27 06:50:39,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793428914] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:39,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:39,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-27 06:50:39,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378349428] [2021-08-27 06:50:39,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 06:50:39,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:39,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 06:50:39,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:50:39,044 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 06:50:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:39,168 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2021-08-27 06:50:39,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 06:50:39,169 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 17 [2021-08-27 06:50:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:39,170 INFO L225 Difference]: With dead ends: 89 [2021-08-27 06:50:39,170 INFO L226 Difference]: Without dead ends: 89 [2021-08-27 06:50:39,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:50:39,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-27 06:50:39,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 56. [2021-08-27 06:50:39,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 52 states have internal predecessors, (56), 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 06:50:39,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2021-08-27 06:50:39,173 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 17 [2021-08-27 06:50:39,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:39,173 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2021-08-27 06:50:39,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 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 06:50:39,173 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2021-08-27 06:50:39,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 06:50:39,173 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:39,173 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:39,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 06:50:39,174 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:39,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:39,174 INFO L82 PathProgramCache]: Analyzing trace with hash 976099109, now seen corresponding path program 1 times [2021-08-27 06:50:39,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:39,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892400265] [2021-08-27 06:50:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:39,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:39,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:39,262 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 06:50:39,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:39,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892400265] [2021-08-27 06:50:39,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892400265] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:39,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:39,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:50:39,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187620754] [2021-08-27 06:50:39,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:50:39,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:39,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:50:39,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:50:39,269 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 06:50:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:39,408 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-08-27 06:50:39,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:50:39,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 19 [2021-08-27 06:50:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:39,410 INFO L225 Difference]: With dead ends: 68 [2021-08-27 06:50:39,410 INFO L226 Difference]: Without dead ends: 68 [2021-08-27 06:50:39,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:50:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-27 06:50:39,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2021-08-27 06:50:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 50 states have internal predecessors, (54), 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 06:50:39,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-08-27 06:50:39,418 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 19 [2021-08-27 06:50:39,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:39,418 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-08-27 06:50:39,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 06:50:39,419 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-08-27 06:50:39,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 06:50:39,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:39,419 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:39,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 06:50:39,420 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:39,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:39,421 INFO L82 PathProgramCache]: Analyzing trace with hash 976099110, now seen corresponding path program 1 times [2021-08-27 06:50:39,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:39,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948374188] [2021-08-27 06:50:39,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:39,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:39,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:39,522 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 06:50:39,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:39,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948374188] [2021-08-27 06:50:39,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948374188] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:39,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:39,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:50:39,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422552170] [2021-08-27 06:50:39,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:50:39,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:39,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:50:39,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:50:39,524 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 06:50:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:39,707 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-08-27 06:50:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 06:50:39,707 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 19 [2021-08-27 06:50:39,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:39,708 INFO L225 Difference]: With dead ends: 64 [2021-08-27 06:50:39,708 INFO L226 Difference]: Without dead ends: 64 [2021-08-27 06:50:39,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-27 06:50:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-27 06:50:39,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 44. [2021-08-27 06:50:39,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 40 states have internal predecessors, (44), 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 06:50:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-08-27 06:50:39,710 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 19 [2021-08-27 06:50:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:39,710 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-08-27 06:50:39,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 06:50:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-08-27 06:50:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 06:50:39,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:39,711 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:39,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 06:50:39,711 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:39,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:39,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1228946458, now seen corresponding path program 1 times [2021-08-27 06:50:39,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:39,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115065825] [2021-08-27 06:50:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:39,711 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:39,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:39,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:39,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115065825] [2021-08-27 06:50:39,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115065825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:50:39,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643699777] [2021-08-27 06:50:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:39,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:50:39,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:50:39,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 06:50:39,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 06:50:39,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:39,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-27 06:50:39,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:40,097 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 06:50:40,104 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 06:50:40,213 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 29 treesize of output 21 [2021-08-27 06:50:40,218 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 18 treesize of output 10 [2021-08-27 06:50:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:40,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643699777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 06:50:40,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:50:40,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2021-08-27 06:50:40,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953329669] [2021-08-27 06:50:40,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 06:50:40,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:40,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 06:50:40,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-27 06:50:40,237 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:40,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:40,384 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-08-27 06:50:40,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 06:50:40,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-08-27 06:50:40,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:40,385 INFO L225 Difference]: With dead ends: 59 [2021-08-27 06:50:40,385 INFO L226 Difference]: Without dead ends: 59 [2021-08-27 06:50:40,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:50:40,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-27 06:50:40,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2021-08-27 06:50:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.205128205128205) internal successors, (47), 43 states have internal predecessors, (47), 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 06:50:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2021-08-27 06:50:40,396 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 20 [2021-08-27 06:50:40,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:40,396 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2021-08-27 06:50:40,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:40,398 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2021-08-27 06:50:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 06:50:40,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:40,400 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:40,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:40,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 06:50:40,609 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr15ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:40,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:40,610 INFO L82 PathProgramCache]: Analyzing trace with hash 557364199, now seen corresponding path program 1 times [2021-08-27 06:50:40,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:40,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740817847] [2021-08-27 06:50:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:40,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 06:50:40,624 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 06:50:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 06:50:40,642 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 06:50:40,642 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 06:50:40,643 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr15ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 06:50:40,644 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 06:50:40,645 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 06:50:40,645 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 06:50:40,645 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-08-27 06:50:40,645 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-08-27 06:50:40,645 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-08-27 06:50:40,645 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-08-27 06:50:40,645 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-08-27 06:50:40,645 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-08-27 06:50:40,646 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-08-27 06:50:40,646 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-08-27 06:50:40,646 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-08-27 06:50:40,646 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 06:50:40,646 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-08-27 06:50:40,646 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-08-27 06:50:40,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 06:50:40,650 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 06:50:40,655 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-27 06:50:40,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 06:50:40 BoogieIcfgContainer [2021-08-27 06:50:40,662 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 06:50:40,663 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 06:50:40,663 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 06:50:40,663 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 06:50:40,663 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:37" (3/4) ... [2021-08-27 06:50:40,665 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 06:50:40,665 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 06:50:40,666 INFO L168 Benchmark]: Toolchain (without parser) took 3443.33 ms. Allocated memory was 56.6 MB in the beginning and 121.6 MB in the end (delta: 65.0 MB). Free memory was 33.6 MB in the beginning and 94.1 MB in the end (delta: -60.5 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:40,667 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 56.6 MB. Free memory was 38.1 MB in the beginning and 38.1 MB in the end (delta: 44.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:50:40,667 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.69 ms. Allocated memory is still 56.6 MB. Free memory was 33.5 MB in the beginning and 34.5 MB in the end (delta: -1.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:40,667 INFO L168 Benchmark]: Boogie Preprocessor took 41.19 ms. Allocated memory is still 56.6 MB. Free memory was 34.3 MB in the beginning and 31.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:40,667 INFO L168 Benchmark]: RCFGBuilder took 424.42 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 31.9 MB in the beginning and 33.9 MB in the end (delta: -2.0 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:40,668 INFO L168 Benchmark]: TraceAbstraction took 2664.95 ms. Allocated memory was 69.2 MB in the beginning and 121.6 MB in the end (delta: 52.4 MB). Free memory was 33.6 MB in the beginning and 94.1 MB in the end (delta: -60.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:50:40,668 INFO L168 Benchmark]: Witness Printer took 2.53 ms. Allocated memory is still 121.6 MB. Free memory is still 94.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:50:40,669 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 56.6 MB. Free memory was 38.1 MB in the beginning and 38.1 MB in the end (delta: 44.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 306.69 ms. Allocated memory is still 56.6 MB. Free memory was 33.5 MB in the beginning and 34.5 MB in the end (delta: -1.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.19 ms. Allocated memory is still 56.6 MB. Free memory was 34.3 MB in the beginning and 31.9 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 424.42 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 31.9 MB in the beginning and 33.9 MB in the end (delta: -2.0 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2664.95 ms. Allocated memory was 69.2 MB in the beginning and 121.6 MB in the end (delta: 52.4 MB). Free memory was 33.6 MB in the beginning and 94.1 MB in the end (delta: -60.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 2.53 ms. Allocated memory is still 121.6 MB. Free memory is still 94.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * 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: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={-1:0}, p={-1:0}] [L544] p->n = 0 VAL [a={-1:0}, p={-1:0}] [L545] p = a VAL [a={-1:0}, p={-1:0}] [L546] COND TRUE p!=0 VAL [a={-1:0}, p={-1:0}] [L547] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={-1:0}, p={-1:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={-1:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={-1:0}, p={0:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: 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: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: 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: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 69 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 2615.2ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 11.8ms, AutomataDifference: 990.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 233 SDtfs, 410 SDslu, 407 SDs, 0 SdLazy, 902 SolverSat, 82 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 545.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 91 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 465.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=5, InterpolantAutomatonStates: 53, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 55.7ms AutomataMinimizationTime, 8 MinimizatonAttempts, 98 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 32.1ms SsaConstructionTime, 115.2ms SatisfiabilityAnalysisTime, 907.5ms InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 134 ConstructedInterpolants, 0 QuantifiedInterpolants, 861 SizeOfPredicates, 8 NumberOfNonLiveVariables, 125 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 9 InterpolantComputations, 7 PerfectInterpolantSequences, 6/8 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 06:50:40,701 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 06:50:42,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 06:50:42,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 06:50:42,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 06:50:42,227 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 06:50:42,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 06:50:42,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 06:50:42,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 06:50:42,236 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 06:50:42,239 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 06:50:42,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 06:50:42,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 06:50:42,243 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 06:50:42,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 06:50:42,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 06:50:42,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 06:50:42,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 06:50:42,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 06:50:42,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 06:50:42,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 06:50:42,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 06:50:42,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 06:50:42,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 06:50:42,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 06:50:42,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 06:50:42,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 06:50:42,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 06:50:42,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 06:50:42,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 06:50:42,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 06:50:42,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 06:50:42,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 06:50:42,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 06:50:42,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 06:50:42,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 06:50:42,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 06:50:42,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 06:50:42,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 06:50:42,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 06:50:42,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 06:50:42,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 06:50:42,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-08-27 06:50:42,291 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 06:50:42,291 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 06:50:42,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 06:50:42,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 06:50:42,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 06:50:42,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 06:50:42,294 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 06:50:42,294 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 06:50:42,294 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 06:50:42,294 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 06:50:42,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 06:50:42,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 06:50:42,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 06:50:42,295 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 06:50:42,295 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 06:50:42,295 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 06:50:42,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 06:50:42,296 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 06:50:42,296 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-27 06:50:42,296 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-27 06:50:42,296 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 06:50:42,296 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 06:50:42,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 06:50:42,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 06:50:42,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 06:50:42,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:50:42,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 06:50:42,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 06:50:42,297 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-27 06:50:42,298 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-27 06:50:42,298 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 06:50:42,298 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-27 06:50:42,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 [2021-08-27 06:50:42,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 06:50:42,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 06:50:42,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 06:50:42,582 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 06:50:42,583 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 06:50:42,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-2.i [2021-08-27 06:50:42,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f77503ee/b7c078c693334c18b54e2497092b2471/FLAG933d09b1f [2021-08-27 06:50:43,057 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 06:50:43,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i [2021-08-27 06:50:43,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f77503ee/b7c078c693334c18b54e2497092b2471/FLAG933d09b1f [2021-08-27 06:50:43,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f77503ee/b7c078c693334c18b54e2497092b2471 [2021-08-27 06:50:43,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 06:50:43,084 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 06:50:43,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 06:50:43,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 06:50:43,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 06:50:43,090 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:50:43" (1/1) ... [2021-08-27 06:50:43,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fde1d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:43, skipping insertion in model container [2021-08-27 06:50:43,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:50:43" (1/1) ... [2021-08-27 06:50:43,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 06:50:43,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 06:50:43,407 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-properties/simple-2.i[23225,23238] [2021-08-27 06:50:43,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:50:43,422 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 06:50:43,451 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-properties/simple-2.i[23225,23238] [2021-08-27 06:50:43,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:50:43,474 INFO L208 MainTranslator]: Completed translation [2021-08-27 06:50:43,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:43 WrapperNode [2021-08-27 06:50:43,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 06:50:43,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 06:50:43,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 06:50:43,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 06:50:43,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:43" (1/1) ... [2021-08-27 06:50:43,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:43" (1/1) ... [2021-08-27 06:50:43,492 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:43" (1/1) ... [2021-08-27 06:50:43,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:43" (1/1) ... [2021-08-27 06:50:43,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:43" (1/1) ... [2021-08-27 06:50:43,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:43" (1/1) ... [2021-08-27 06:50:43,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:43" (1/1) ... [2021-08-27 06:50:43,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 06:50:43,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 06:50:43,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 06:50:43,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 06:50:43,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:43" (1/1) ... [2021-08-27 06:50:43,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:50:43,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:50:43,537 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 06:50:43,555 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 06:50:43,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 06:50:43,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 06:50:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-08-27 06:50:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 06:50:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 06:50:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 06:50:43,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 06:50:43,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 06:50:43,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 06:50:43,575 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-27 06:50:43,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 06:50:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 06:50:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 06:50:43,575 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 06:50:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 06:50:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 06:50:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 06:50:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 06:50:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 06:50:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 06:50:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 06:50:43,576 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 06:50:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 06:50:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 06:50:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 06:50:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 06:50:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 06:50:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 06:50:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 06:50:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 06:50:43,577 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 06:50:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 06:50:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 06:50:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 06:50:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 06:50:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 06:50:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 06:50:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 06:50:43,578 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 06:50:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 06:50:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 06:50:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 06:50:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 06:50:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 06:50:43,579 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 06:50:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 06:50:43,580 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 06:50:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 06:50:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 06:50:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 06:50:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 06:50:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 06:50:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 06:50:43,581 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 06:50:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 06:50:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 06:50:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 06:50:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 06:50:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 06:50:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 06:50:43,582 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 06:50:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 06:50:43,583 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 06:50:43,590 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 06:50:43,590 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 06:50:43,590 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 06:50:43,591 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 06:50:43,591 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 06:50:43,591 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 06:50:43,591 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 06:50:43,591 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 06:50:43,591 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 06:50:43,591 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 06:50:43,592 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 06:50:43,592 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 06:50:43,592 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 06:50:43,592 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 06:50:43,592 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 06:50:43,593 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 06:50:43,593 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 06:50:43,593 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 06:50:43,594 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 06:50:43,594 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 06:50:43,594 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 06:50:43,594 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 06:50:43,594 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 06:50:43,594 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 06:50:43,594 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 06:50:43,594 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 06:50:43,595 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 06:50:43,595 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 06:50:43,595 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 06:50:43,595 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 06:50:43,595 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 06:50:43,595 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 06:50:43,595 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 06:50:43,595 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 06:50:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 06:50:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 06:50:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 06:50:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 06:50:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 06:50:43,596 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 06:50:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 06:50:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 06:50:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 06:50:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 06:50:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 06:50:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 06:50:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 06:50:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 06:50:43,597 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 06:50:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 06:50:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 06:50:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 06:50:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 06:50:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 06:50:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 06:50:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 06:50:43,598 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 06:50:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 06:50:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 06:50:43,599 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 06:50:43,600 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 06:50:43,600 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-27 06:50:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 06:50:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 06:50:43,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-27 06:50:43,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 06:50:43,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 06:50:43,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-27 06:50:43,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 06:50:43,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-27 06:50:43,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 06:50:43,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-08-27 06:50:43,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-08-27 06:50:43,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-08-27 06:50:43,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 06:50:43,999 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-27 06:50:44,195 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 06:50:44,196 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-27 06:50:44,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:44 BoogieIcfgContainer [2021-08-27 06:50:44,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 06:50:44,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 06:50:44,198 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 06:50:44,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 06:50:44,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 06:50:43" (1/3) ... [2021-08-27 06:50:44,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59387ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:50:44, skipping insertion in model container [2021-08-27 06:50:44,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:43" (2/3) ... [2021-08-27 06:50:44,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59387ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:50:44, skipping insertion in model container [2021-08-27 06:50:44,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:44" (3/3) ... [2021-08-27 06:50:44,202 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-08-27 06:50:44,205 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 06:50:44,205 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-08-27 06:50:44,242 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 06:50:44,246 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 06:50:44,246 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-08-27 06:50:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 43 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:50:44,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 06:50:44,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:44,263 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:44,264 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:44,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:44,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1701322882, now seen corresponding path program 1 times [2021-08-27 06:50:44,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:44,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529090718] [2021-08-27 06:50:44,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:44,275 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:44,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:44,276 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 06:50:44,285 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 06:50:44,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:44,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 06:50:44,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:44,471 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 06:50:44,523 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 06:50:44,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:44,585 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 06:50:44,586 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:44,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529090718] [2021-08-27 06:50:44,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529090718] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:44,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:44,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-08-27 06:50:44,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352886744] [2021-08-27 06:50:44,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:50:44,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:44,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:50:44,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:50:44,604 INFO L87 Difference]: Start difference. First operand has 49 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 43 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 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 06:50:44,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:44,759 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-08-27 06:50:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:50:44,760 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 06:50:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:44,765 INFO L225 Difference]: With dead ends: 57 [2021-08-27 06:50:44,765 INFO L226 Difference]: Without dead ends: 49 [2021-08-27 06:50:44,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:44,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-27 06:50:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-08-27 06:50:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 39 states have internal predecessors, (46), 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 06:50:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2021-08-27 06:50:44,787 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 10 [2021-08-27 06:50:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:44,788 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2021-08-27 06:50:44,788 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 06:50:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2021-08-27 06:50:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 06:50:44,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:44,789 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:44,800 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 06:50:44,995 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 06:50:44,996 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:44,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1701322883, now seen corresponding path program 1 times [2021-08-27 06:50:44,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:44,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613594837] [2021-08-27 06:50:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:44,998 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:44,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:44,999 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 06:50:45,003 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 06:50:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:45,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 06:50:45,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:45,187 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 06:50:45,267 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 06:50:45,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:45,429 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 06:50:45,430 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:45,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613594837] [2021-08-27 06:50:45,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613594837] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:45,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:45,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-08-27 06:50:45,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060633671] [2021-08-27 06:50:45,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:50:45,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:45,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:50:45,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:45,433 INFO L87 Difference]: Start difference. First operand 43 states and 49 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 06:50:45,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:45,678 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-08-27 06:50:45,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:50:45,678 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 06:50:45,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:45,679 INFO L225 Difference]: With dead ends: 58 [2021-08-27 06:50:45,679 INFO L226 Difference]: Without dead ends: 58 [2021-08-27 06:50:45,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:50:45,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-27 06:50:45,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2021-08-27 06:50:45,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.457142857142857) internal successors, (51), 46 states have internal predecessors, (51), 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 06:50:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-08-27 06:50:45,683 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 10 [2021-08-27 06:50:45,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:45,683 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-08-27 06:50:45,684 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 06:50:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-08-27 06:50:45,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 06:50:45,684 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:45,684 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:45,699 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 06:50:45,884 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 06:50:45,885 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr15ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:45,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:45,886 INFO L82 PathProgramCache]: Analyzing trace with hash 932559388, now seen corresponding path program 1 times [2021-08-27 06:50:45,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:45,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174012648] [2021-08-27 06:50:45,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:45,887 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:45,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:45,888 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 06:50:45,889 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 06:50:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:46,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 06:50:46,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:46,064 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 06:50:46,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:46,111 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 06:50:46,112 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:46,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174012648] [2021-08-27 06:50:46,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174012648] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:46,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:46,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-08-27 06:50:46,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313945661] [2021-08-27 06:50:46,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:50:46,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:46,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:50:46,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:50:46,114 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 06:50:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:46,199 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2021-08-27 06:50:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:50:46,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 15 [2021-08-27 06:50:46,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:46,201 INFO L225 Difference]: With dead ends: 55 [2021-08-27 06:50:46,201 INFO L226 Difference]: Without dead ends: 55 [2021-08-27 06:50:46,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:46,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-27 06:50:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2021-08-27 06:50:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 46 states have internal predecessors, (50), 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 06:50:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-08-27 06:50:46,204 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 15 [2021-08-27 06:50:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:46,204 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-08-27 06:50:46,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 06:50:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-08-27 06:50:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 06:50:46,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:46,205 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:46,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-08-27 06:50:46,408 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 06:50:46,409 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr12ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:46,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1155389113, now seen corresponding path program 1 times [2021-08-27 06:50:46,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:46,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1763559769] [2021-08-27 06:50:46,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:46,410 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:46,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:46,411 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 06:50:46,413 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 06:50:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:46,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 06:50:46,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:46,599 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 06:50:46,648 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-08-27 06:50:46,648 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 06:50:46,686 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 06:50:46,697 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 06:50:46,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:46,776 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 73 treesize of output 69 [2021-08-27 06:50:46,841 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 06:50:46,841 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:46,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1763559769] [2021-08-27 06:50:46,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1763559769] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:46,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:46,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-08-27 06:50:46,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371416593] [2021-08-27 06:50:46,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 06:50:46,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:46,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 06:50:46,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:50:46,842 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 06:50:47,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:47,128 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2021-08-27 06:50:47,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:50:47,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 16 [2021-08-27 06:50:47,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:47,134 INFO L225 Difference]: With dead ends: 86 [2021-08-27 06:50:47,134 INFO L226 Difference]: Without dead ends: 86 [2021-08-27 06:50:47,134 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:50:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-27 06:50:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2021-08-27 06:50:47,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 50 states have internal predecessors, (54), 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 06:50:47,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2021-08-27 06:50:47,138 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 16 [2021-08-27 06:50:47,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:47,138 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2021-08-27 06:50:47,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 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 06:50:47,138 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2021-08-27 06:50:47,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 06:50:47,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:47,138 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:47,147 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 06:50:47,347 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 06:50:47,348 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:47,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:47,348 INFO L82 PathProgramCache]: Analyzing trace with hash -718408589, now seen corresponding path program 1 times [2021-08-27 06:50:47,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:47,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2039126675] [2021-08-27 06:50:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:47,349 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:47,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:47,350 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 06:50:47,350 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 06:50:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:47,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 06:50:47,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:47,531 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 06:50:47,553 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 06:50:47,572 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 06:50:47,599 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 06:50:47,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:47,657 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 06:50:47,657 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:47,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2039126675] [2021-08-27 06:50:47,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2039126675] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:47,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:47,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-08-27 06:50:47,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993256452] [2021-08-27 06:50:47,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:50:47,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:47,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:50:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:47,660 INFO L87 Difference]: Start difference. First operand 54 states and 57 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 06:50:47,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:47,870 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-08-27 06:50:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:50:47,871 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 06:50:47,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:47,871 INFO L225 Difference]: With dead ends: 66 [2021-08-27 06:50:47,871 INFO L226 Difference]: Without dead ends: 66 [2021-08-27 06:50:47,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:50:47,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-27 06:50:47,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2021-08-27 06:50:47,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 48 states have internal predecessors, (52), 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 06:50:47,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-08-27 06:50:47,877 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 17 [2021-08-27 06:50:47,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:47,877 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-08-27 06:50:47,877 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 06:50:47,877 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-08-27 06:50:47,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 06:50:47,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:47,878 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:47,885 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 06:50:48,084 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 06:50:48,085 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:48,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:48,085 INFO L82 PathProgramCache]: Analyzing trace with hash -718408588, now seen corresponding path program 1 times [2021-08-27 06:50:48,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:48,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739798826] [2021-08-27 06:50:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:48,085 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:48,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:48,086 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 06:50:48,087 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 06:50:48,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:48,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 06:50:48,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:48,264 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 06:50:48,297 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 06:50:48,304 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 06:50:48,333 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 06:50:48,338 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 06:50:48,379 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 06:50:48,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:48,602 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 06:50:48,602 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:48,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739798826] [2021-08-27 06:50:48,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739798826] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:48,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:48,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-08-27 06:50:48,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062098794] [2021-08-27 06:50:48,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 06:50:48,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:48,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 06:50:48,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:50:48,604 INFO L87 Difference]: Start difference. First operand 52 states and 55 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 06:50:49,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:49,152 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-08-27 06:50:49,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 06:50:49,157 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 06:50:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:49,158 INFO L225 Difference]: With dead ends: 62 [2021-08-27 06:50:49,158 INFO L226 Difference]: Without dead ends: 62 [2021-08-27 06:50:49,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:50:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-27 06:50:49,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2021-08-27 06:50:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 38 states have internal predecessors, (42), 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 06:50:49,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-08-27 06:50:49,161 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 17 [2021-08-27 06:50:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:49,161 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-08-27 06:50:49,162 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 06:50:49,162 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-08-27 06:50:49,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 06:50:49,162 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:49,162 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:49,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-08-27 06:50:49,371 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 06:50:49,371 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:49,372 INFO L82 PathProgramCache]: Analyzing trace with hash -324277973, now seen corresponding path program 1 times [2021-08-27 06:50:49,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:49,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1636119172] [2021-08-27 06:50:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:49,372 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:49,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:49,373 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 06:50:49,374 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 06:50:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:49,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 06:50:49,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:49,572 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 06:50:49,579 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 06:50:49,652 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 37 treesize of output 25 [2021-08-27 06:50:49,655 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 22 treesize of output 10 [2021-08-27 06:50:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:49,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:49,749 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 35 treesize of output 29 [2021-08-27 06:50:49,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:50:49,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 06:50:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:49,789 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:49,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1636119172] [2021-08-27 06:50:49,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1636119172] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-27 06:50:49,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 06:50:49,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-27 06:50:49,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707653807] [2021-08-27 06:50:49,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:50:49,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:49,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:50:49,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:50:49,791 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 06:50:50,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:50,327 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2021-08-27 06:50:50,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:50:50,328 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 19 [2021-08-27 06:50:50,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:50,329 INFO L225 Difference]: With dead ends: 57 [2021-08-27 06:50:50,329 INFO L226 Difference]: Without dead ends: 57 [2021-08-27 06:50:50,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:50:50,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-27 06:50:50,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2021-08-27 06:50:50,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 41 states have internal predecessors, (45), 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 06:50:50,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-08-27 06:50:50,331 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 19 [2021-08-27 06:50:50,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:50,331 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-08-27 06:50:50,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 06:50:50,331 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-08-27 06:50:50,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 06:50:50,332 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:50,332 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 06:50:50,345 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 06:50:50,542 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 06:50:50,543 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr15ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 11 more)] === [2021-08-27 06:50:50,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:50,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1462683817, now seen corresponding path program 1 times [2021-08-27 06:50:50,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:50,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040218533] [2021-08-27 06:50:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:50,543 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:50,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:50,544 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 06:50:50,546 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 06:50:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 06:50:50,715 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 06:50:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 06:50:50,777 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-27 06:50:50,777 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 06:50:50,778 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr15ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 06:50:50,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 06:50:50,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 06:50:50,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 06:50:50,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-08-27 06:50:50,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-08-27 06:50:50,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-08-27 06:50:50,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-08-27 06:50:50,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-08-27 06:50:50,780 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-08-27 06:50:50,796 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-08-27 06:50:50,797 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-08-27 06:50:50,797 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-08-27 06:50:50,797 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 06:50:50,797 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-08-27 06:50:50,797 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-08-27 06:50:50,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-08-27 06:50:51,004 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 06:50:51,009 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 06:50:51,013 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-27 06:50:51,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 06:50:51 BoogieIcfgContainer [2021-08-27 06:50:51,024 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 06:50:51,025 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 06:50:51,025 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 06:50:51,025 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 06:50:51,025 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:44" (3/4) ... [2021-08-27 06:50:51,030 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 06:50:51,030 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 06:50:51,031 INFO L168 Benchmark]: Toolchain (without parser) took 7946.31 ms. Allocated memory was 58.7 MB in the beginning and 119.5 MB in the end (delta: 60.8 MB). Free memory was 36.3 MB in the beginning and 37.3 MB in the end (delta: -1.0 MB). Peak memory consumption was 60.5 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:51,031 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:50:51,032 INFO L168 Benchmark]: CACSL2BoogieTranslator took 387.76 ms. Allocated memory is still 58.7 MB. Free memory was 36.1 MB in the beginning and 34.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:51,032 INFO L168 Benchmark]: Boogie Preprocessor took 37.09 ms. Allocated memory is still 58.7 MB. Free memory was 34.9 MB in the beginning and 31.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:51,032 INFO L168 Benchmark]: RCFGBuilder took 684.47 ms. Allocated memory was 58.7 MB in the beginning and 81.8 MB in the end (delta: 23.1 MB). Free memory was 31.8 MB in the beginning and 44.8 MB in the end (delta: -12.9 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:51,033 INFO L168 Benchmark]: TraceAbstraction took 6826.17 ms. Allocated memory was 81.8 MB in the beginning and 119.5 MB in the end (delta: 37.7 MB). Free memory was 44.4 MB in the beginning and 38.4 MB in the end (delta: 6.0 MB). Peak memory consumption was 45.8 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:51,033 INFO L168 Benchmark]: Witness Printer took 5.60 ms. Allocated memory is still 119.5 MB. Free memory was 38.4 MB in the beginning and 37.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:50:51,034 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 387.76 ms. Allocated memory is still 58.7 MB. Free memory was 36.1 MB in the beginning and 34.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.09 ms. Allocated memory is still 58.7 MB. Free memory was 34.9 MB in the beginning and 31.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 684.47 ms. Allocated memory was 58.7 MB in the beginning and 81.8 MB in the end (delta: 23.1 MB). Free memory was 31.8 MB in the beginning and 44.8 MB in the end (delta: -12.9 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6826.17 ms. Allocated memory was 81.8 MB in the beginning and 119.5 MB in the end (delta: 37.7 MB). Free memory was 44.4 MB in the beginning and 38.4 MB in the end (delta: 6.0 MB). Peak memory consumption was 45.8 MB. Max. memory is 16.1 GB. * Witness Printer took 5.60 ms. Allocated memory is still 119.5 MB. Free memory was 38.4 MB in the beginning and 37.3 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.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * 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: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={1:0}] [L534] List t; [L535] List p = a; VAL [a={1:0}, p={1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={1:0}, p={1:0}] [L544] p->n = 0 VAL [a={1:0}, p={1:0}] [L545] p = a VAL [a={1:0}, p={1:0}] [L546] COND TRUE p!=0 VAL [a={1:0}, p={1:0}] [L547] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={1:0}, p={1:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={1:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={1:0}, p={0:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: 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: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: 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: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 74 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 6767.1ms, OverallIterations: 8, TraceHistogramMax: 2, EmptinessCheckTime: 13.4ms, AutomataDifference: 2106.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 191 SDtfs, 381 SDslu, 443 SDs, 0 SdLazy, 627 SolverSat, 88 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1437.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 221 GetRequests, 169 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 670.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=4, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 32.2ms AutomataMinimizationTime, 7 MinimizatonAttempts, 97 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 61.4ms SsaConstructionTime, 162.4ms SatisfiabilityAnalysisTime, 1674.1ms InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 194 ConstructedInterpolants, 1 QuantifiedInterpolants, 994 SizeOfPredicates, 32 NumberOfNonLiveVariables, 561 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 6/8 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 06:50:51,063 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...